PUMY P36NKMU4 Split Type Heat Pump Air Conditioners Instruction Manual

CONTENTS
1. SAFETY PRECAUTION ······················· 2 2. OVERVIEW OF UNITS ························ 5 3. SPECIFICATIONS ···························· 11 4. DATA·············································· 14 5. OUTLINES AND DIMENSIONS ··········· 36 6. WIRING DIAGRAM ··························· 37 7. NECESSARY CONDITIONS
FOR SYSTEM CONSTRUCTION ········· 40 8. TROUBLESHOOTING ······················· 55 9. ELECTRICAL WIRING ·····················133 10. REFRIGERANT PIPING TASKS ·········139 11. DISASSEMBLY PROCEDURE ···········147 12. REMOTE CONTROLLER ··················168
PARTS CATALOG (OCB811)

1 SAFETY PRECAUTION
1-1. ALWAYS OBSERVE FOR SAFETY
Before obtaining access to terminal, all supply circuit must be disconnected.

Preparation before the repair service
· Prepare the proper tools. · Prepare the proper protectors. · Provide adequate ventilation. · After stopping the operation of the air conditioner, turn
off the power-supply breaker. · Discharge the condenser before the work involving the
electric parts.

Precautions during the repair service
· Do not perform the work involving the electric parts with wet hands.
· Do not pour water into the electric parts. · Do not touch the refrigerant. · Do not touch the hot or cold areas in the refrigerating
cycle. · When the repair or the inspection of the circuit needs
to be done without turning off the power, exercise great caution not to touch the live parts. · When opening or closing the valve below freezing temperatures, refrigerant may spurt out from the gap between the valve stem and the valve body, resulting in injuries.

1-2. CAUTIONS RELATED TO NEW REFRIGERANT
Cautions for units utilizing refrigerant R410A

Use new refrigerant pipes.
Avoid using thin pipes.
Make sure that the inside and outside of refrigerant piping is clean and it has no contaminants such as sulfur, oxides, dirt, shaving particles, etc., which are hazard to refrigerant cycle. In addition, use pipes with specified thickness.
Contamination inside refrigerant piping can cause deterioration of refrigerant oil, etc.
Follow the instructions below to prevent abrasive components contained in sandpaper and cutting tools from entering the refrigerant circuit because those components can cause failures of the compressor and valves.
· To deburr pipes, use a reamer or other deburring tools, not sandpaper.
· To cut pipes, use a pipe cutter, not a grinder or other tools that use abrasive materials.
· When cutting or deburring pipes, do not allow cutting chips or other foreign matters to enter the pipes.
· If cutting chips or other foreign matters enter pipes, wipe them off the inside of the pipes.
Store the piping indoors, and keep both ends of the piping sealed until just before brazing. (Leave elbow joints, etc. in their packaging.)
If dirt, dust or moisture enters into refrigerant cycle, that can cause deterioration of refrigerant oil or malfunction of compressor.

Use a vacuum pump with a reverse flow check valve.
Vacuum pump oil may flow back into refrigerant cycle and that can cause deterioration of refrigerant oil, etc.

Use the following tools specifically designed for use with R410A refrigerant.

The following tools are necessary to use R410A

refrigerant.

Tools for R410A

Gauge manifold

Flare tool

Charge hose

Size adjustment gauge

Gas leak detector

Vacuum pump adaptor

Torque wrench

Electronic refrigerant charging scale

Handle tools with care.
If dirt, dust or moisture enters into refrigerant cycle, that can cause deterioration of refrigerant oil or malfunction of compressor.

Do not use a charging cylinder.
If a charging cylinder is used, the composition of refrigerant will change and the efficiency will be lowered.

Ventilate the room if refrigerant leaks during operation. If refrigerant comes into contact with a flame, poisonous gases will be released.

OCH811B

The refrigerant oil applied to flare and flange connections must be ester oil, ether oil or alkylbenzene oil in a small amount. If large amount of mineral oil enters, that can cause deterioration of refrigerant oil, etc.
Charge refrigerant from liquid phase of gas cylinder.
If the refrigerant is charged from gas phase, composition change may occur in refrigerant and the efficiency will be lowered.
Do not use refrigerant other than R410A.
If other refrigerant (R22, etc.) is used, chlorine in refrigerant can cause deterioration of refrigerant oil, etc.

Use the specified refrigerant only.
Never use any refrigerant other than that specified. Doing so may cause a burst, an explosion, or fire when the unit is being used, serviced, or disposed of. Correct refrigerant is specified in the manuals and on the spec labels provided with our products. We will not be held responsible for mechanical failure, system malfunction, unit breakdown or accidents caused by failure to follow the instructions.
Do not pump down the system when a gas leak has been detected.
The intake of air or other gases causes abnormally high pressure in the refrigeration cycle, which may cause explosion or injury.

[1] Cautions for service
(1) Perform service after recovering the refrigerant left in unit completely. (2) Do not release refrigerant in the air. (3) After completing service, charge the cycle with specified amount of refrigerant. (4) If moisture or foreign matter might have entered the refrigerant piping during service, ensure to remove them.
[2] Additional refrigerant charge
When charging directly from cylinder (1) Check that cylinder for R410A on the market is a syphon type. (2) Charging should be performed with the cylinder of syphon stood vertically. (Refrigerant is charged from liquid phase.)

Unit

Electronic weighing scale

[3] Service tools
Use the below service tools as exclusive tools for R410A refrigerant.

No.

Tool name

1 Gauge manifold

2 Charge hose
3 Electronic weighing scale 4 Gas leak detector 5 Adaptor for reverse flow check 6 Refrigerant charge base 7 Refrigerant cylinder
8 Refrigerant recovery equipment

Specifications · Only for R410A · Use the existing fitting specifications. (UNF1/2) · Use high-tension side pressure of 768.7 PSIG [5.3 MPa.G] or over. · Only for R410A · Use pressure performance of 738.2 PSIG [5.09 MPa.G] or over.
— · Use the detector for R134a, R407C or R410A. · Attach on vacuum pump.
— · Only for R410A · Top of cylinder (Pink) · Cylinder with syphon
—

OCH811B

Cautions for refrigerant piping work
New refrigerant R410A is adopted for replacement inverter series. Although the refrigerant piping work for R410A is same as for R22, exclusive tools are necessary so as not to mix with different kind of refrigerant. Furthermore as the working pressure of R410A is 1.6 times higher than that of R22, their sizes of flared sections and flare nuts are different.
Thickness of pipes Because the working pressure of R410A is higher compared to R22, be sure to use refrigerant piping with thickness shown below. (Never use pipes of 7/256 in [0.7 mm] or below.)

1 Diagram below: Piping diameter and thickness

Nominal

Outside

dimensions (in) diameter (mm)

Thickness : in [mm]

R410A

R22

1/4

Ø6.35

1/32 [0.8]

3/8

Ø9.52

1/32 [0.8]

1/2

Ø12.70

1/32 [0.8]

5/8

Ø15.88

5/128 [1.0] 5/128 [1.0]

3/4

Ø19.05

5/128 [1.0]* 5/128 [1.0]

*Use 1/2 H or H pipes.

2 Dimensions of flare cutting and flare nut The component molecules in HFC refrigerant are smaller compared to conventional refrigerants. In addition to that, R410A is a refrigerant, which has higher risk of leakage because its working pressure is higher than that of other refrigerants. Therefore, to enhance airtightness and strength, flare cutting dimension of copper pipe for R410A has been specified separately from the dimensions for other refrigerants as shown below. The dimension B of flare nut for R410A also has partly been changed to increase strength as shown below. Set copper pipe correctly referring to copper pipe flaring dimensions for R410A below. For 1/2 and 5/8 inch pipes, the dimension B changes. Use torque wrench corresponding to each dimension.

Dimension A

Dimension B

Flare cutting dimensions

Unit : in [mm]

Nominal

Outside

dimensions (in) diameter (mm)

Dimension

(

0 -0.4

)

R410A

R22

1/4

Ø6.35 11/32-23/64 [ 9.1]

9.0

3/8

Ø9.52 1/2-33/64 [13.2] 13.0

1/2

Ø12.70 41/64-21/32 [16.6] 16.2

5/8

Ø15.88 49/64-25/32 [19.7] 19.4

3/4

Ø19.05

—

23.3

Flare nut dimensions

Unit: in [mm]

Nominal

Outside

Dimension B

dimensions (in) diameter (mm) R410A

R22

1/4

Ø6.35

43/64 [17.0] 17.0

3/8

Ø9.52

7/8 [22.0] 22.0

1/2

Ø12.70 1-3/64 [26.0] 24.0

5/8

Ø15.88 1-9/64 [29.0] 27.0

3/4

Ø19.05

—

36.0

3 Tools for R410A (The following table shows whether conventional tools can be used or not.)

Tools and materials

Use

R410A tools

Can R22 tools be used? Can R407C tools be used?

Gauge manifold

Air purge, refrigerant charge Tool exclusive for R410A

Charge hose

and operation check

Tool exclusive for R410A

Gas leak detector

Gas leak check

Tool for HFC refrigerant

Refrigerant recovery equipment Refrigerant recovery

Tool exclusive for R410A

Refrigerant cylinder

Refrigerant charge

Tool exclusive for R410A

Applied oil

Apply to flared section

Ester oil, ether oil and alkylbenzene oil (minimum amount)

Ester oil, ether oil: Alkylbenzene oil: minimum amount

Safety charger

Prevent compressor malfunction Tool exclusive for R410A

when charging refrigerant by

spraying liquid refrigerant

Charge valve

Prevent gas from blowing out Tool exclusive for R410A

when detaching charge hose

Vacuum pump

Vacuum drying and air Tools for other refrigerants can (Usable if equipped

(Usable if equipped

purge

be used if equipped with adop- with adopter for rever- with adopter for rever-

ter for reverse flow check

se flow)

Flare tool

Flaring work of piping

Tools for other refrigerants can be used by adjusting
flaring dimension

(Usable by adjusting flaring dimension)

Bender

Bend the pipes

Tools for other refrigerants can be used

Pipe cutter

Cut the pipes

Tools for other refrigerants can be used

Welder and nitrogen gas cylinder Weld the pipes

Tools for other refrigerants can be used

Refrigerant charging scale Refrigerant charge

Tools for other refrigerants can be used

Vacuum gauge or thermis- Check the degree of vacuum. (Vacuum Tools for other refrigerants

tor vacuum gauge and valve prevents back flow of oil and refri- can be used

vacuum valve

gerant to thermistor vacuum gauge)

Charging cylinder

Refrigerant charge

Tool exclusive for R410A

: Prepare a new tool. (Use the new tool as the tool exclusive for R410A.)

: Tools for other refrigerants can be used under certain conditions. : Tools for other refrigerants can be used.

OCH811B

2 OVERVIEW OF UNITS
2-1. Auxiliary HEATING ON/OFF CONTROL SET-UP
(1) Auxiliary heating operation controls another heat source that depends on the main system’s operations,which means the interlock operation shown in “b)” will be possible.
a) Indoor unit must be R410A UL model for this function to operate. b) Different Indoor unit applications that can be applied:

PLFY PCFY PKFY PFFY

PEFY

Electric Heating or
Hot water Heating
(2) Outdoor unit DIPSW5-4 for auxiliary heating control: Set DIPSW5-4 when power is turned off at unit. OFF: Disable auxiliary Heating Function (Initial setting) ON: Enable auxiliary Heating Function
(3) Determine required indoor fan speed during defrost mode: To set the fan speed, see the chapter referring to heater control in the indoor unit’s Technical & Service Manual.

OCH811B

(4) Determine fan speed setting during indoor thermo-OFF conditions: a) These settings are done within Indoor DIPSW1-7 and DIPSW1-8, see chart below for options. b) Recommended SW1-7 OFF and SW1-8 ON will determine airflow based on “Setting on the remote controller”.

Auxiliary heating signal
Thermo contidion

SW1-7 SW1-8

OFF

Fan speed setting
OFF

Fan speed setting
ON

Very low Low

Setting on remote controller

IC3
RA17°C
20°C Thermo – ON

IC2
RA19°C

IC1
RA21°C

20°C Thermo – ON

20°C Thermo – OFF

OFF ON

ON Setting on remote controller

Stopped

Baseboard Heating

(5) Setting outdoor unit and auxiliary heat switch over temperatures When the DIPSW 5-4 is set to “ON”, the outdoor unit and the contact output operates as shown below.
a)Outdoor default setting and operations are shown below:

Amb. decreasing Amb. increasing

Stage 1 – Outdoor unit HP operation – Defrost : Heater contact ON signal – Other than defrost : Contact OFF

Stage 2 – Outdoor unit HP operation – Heater contact ON signal
Stage 3 – Outdoor unit OFF (Standby) – Heater contact ON signal

a
-13°F [-25°C]

b 32°F [0°C]

c 50°F [10°C]

d 68°F [20°C]

TH7 = Outdoor temperature

When the set temperature ranges overlap, the previously set pattern (1, 2 or 3) has a priority. The stage 1 has the highest priority, 2 the second and then 3.
b) Based on above chart listed the sequence of operation on “On ambient decrease” Stage 1: (TH7 50°F [10°C]): the outdoor unit runs in HP mode. Stage 2: (TH7 = 50 to -13°F [10 to -25°C]): the outdoor unit runs in HP mode with auxiliary heating. Stage 3: (TH7 -13°F [-25°C]): Auxiliary heating only (Outdoor unit is OFF).
c) Based on above chart listed the sequence of operation on “On ambient increase”
Stage 3: (TH7 32°F [0°C]): Auxiliary heating only (Outdoor unit is OFF). Stage 2: (TH7 32 to 68°F [0 to 20°C]): Auxiliary heating with outdoor unit in HP mode. Stage 1: (TH7 68°F [20°C]): Outdoor unit in HP mode only.

OCH811B

(6) Locally procured wiring

A basic connection method is shown.

(i.e. interlocked operation with the electric heater with the fan speed setting on high)

Remote control Board

Relay circuit

Adapter

Indoor unit control board

Red 1

CN24

Outdoor unit control board
Dip switch SW5-4 “ON”

Electric Heater power source Green Yellow

X
Electric Heater

X +

White 2 Red 1
Red 2

CN22

Preparations in the field

Maximum cable length is 10 m (32ft)

For relay X use the specifications given below operation coil

Rated voltage: 12 V DC Power consumption: 0.9 W or less *Use the diode that is recommended by the relay manufacturer at both ends of the relay coil.

The length of the electrical wiring for the PAC-YU24HT is 2 meters (6-1/2 ft)

To extend this length, use sheathed 2-core cable.

Control cable type: CVV, CVS, CPEV, or equivalent.

Cable size: 0.5 mm2 to 1.25 mm2 (AWG22 to AWG16) Do not extend the cable more than 10 meters (32 ft).

Recommended circuit

1-phase power supply

208V, 230V/60Hz R

S
Wiring diagram

Control board

88H

FS1

88H

FS2 FS1

FS2 88H

CN24

H1 H2 26H

FS1, 2 —– Thermal fuse
H1, H2 —– Heater
26H ——— Overheat protection thermostat
88H ——— Electromagnetic contactor

OCH811B

2-2. SYSTEM CONSTRUCTION

Outdoor unit
Applicable Capacity indoor unit Number of units
Total system capacity range

4HP P36NKMU4 HP36NKMU2
04 to 36 1 to 11

4.5HP

5HP

HP42NKMU2

P48NKMU4 HP48NKMU2

04 to 54

1 to 12

50 to 130% of outdoor unit capacity

Model name Number of branches

CMY-Y62-G-E 2

CMY-Y64-G-E 4

CMY-Y68-G-E 8

7HP P60NKMU4
04 to 72

Connectable indoor unit lineup

Model type

Model name

04 05 06 08 12 15 18 24 27 30 36 48 54 72

Ceiling Cassette

4-way flow PLFY-EP NEMU-E

2 by 2

PLFY-P NFMU-E

1-way flow PMFY-P NBMU-E

Ceiling Concealed

PEFY-P NMAU-E

NMSU-E

NMHU-E

Wall Mounted

PKFY-P

NMHSU-E NKMU-E

NLMU-E

Ceiling Suspended

PCFY-P NKMU-E

Floor standing

Exposed PFFY-P Concealed

NEMU-E NRMU-E

Multi-position air handling unit

PVFY-P

* Only PUMY-P60 is connectable.

NAMU-E

Remote controller

Name Model number Functions

M-NET remote controller
PAR-F27MEA-E, PAR-U01MEDU
· A handy remote controller for use in conjunction with the Melans centralized management system.
· Addresses must be set.

MA remote controller PAR-21MAA, PAR-41MAA · Addresses setting is not necessary.

OCH811B

2-3 SYSTEM CONSTRUCTION( BRANCH BOX SYSTEM)

Outdoor unit
Applicable indoor unit

Model name
Horse power Capacity class

P36NKMU4 HP36NKMU2

HP42NKMU2

P48NKMU4 HP48NKMU2

4HP

4.5HP

5HP

Type 06 to Type 36

Caution: The indoor unit which rated capacity exceeds 36 kBtu/ h (Type 36) can NOT be connected.

Number of units
Total system capacity range

2(*1) to 4 33 to 130% of outdoor
unit capacity
12 to 46.8 kBtu/h

2(*1) to 5 29 to 130% of outdoor
unit capacity
12 to 54.6 kBtu/h

2(*1) to 8 25 to 130% of outdoor
unit capacity
12 to 62.4 kBtu/h

Branch box that can Number of units be connected

1 or 2

P60NKMU4 7HP
2(*1) to 8 20 to 130% of outdoor
unit capacity 12 to 78 kBtu/h

Wall-mounted

Model type Deluxe
Designer

Connectable indoor unit lineups (Heat pump inverter type)

Model name

MSZ-FH06/09/12/15NA, 18NA MSZ-FS·NA

MSZ-EF·NAW(B/S)

Ducted

Standard Low static*3 *4

MSZ-GL·NA MSZ-GS·NA
SEZ-KD·NA

P-series mid static*3 *4

PEAD-A·AA

1-way ceiling cassette

MLZ-KY06NA* MLZ-KP09/12/18NA

4-way ceiling cassette

P-series 22*22 P-series 33*33

Floor standing

Standard Multi-position air handler*2

A-coil

SLZ-KF·NA PLA-A·EA*5 MFZ-KJ·NA SVZ-KP·NA PAA-A·A *5

Branch box
Number of branches (Indoor unit that can be connected)

PAC-MKA52/53BC 5 (MAX. 5 units)

Note: A maximum of 2 branch boxes can be connected to 1 outdoor unit.

2- branch pipe (joint), Optional parts
Using 1 branch box Using 2 branch boxes

Model name
MSDD-50AR-E MSDD-50BR-E

Note:Select a model according to the connection method.

PAC-MKA32/33BC 3 (MAX. 3 units)
Note No required
Connection method: flare Connection method: brazing

Option

Optional accessories for indoor units and outdoor units are available.

*1 Only one unit connection is possible with ducted unit. *2 When connecting a multi-position unit(s), set additional constraints as follows. For connections other than those specified below, consult your dealer.

Models other than PUMY-P60NKMU4 (For each connected branch box)

Number of connecting multi-position unit

Constraints

Any indoor units other than ducted units are not connectable.

PUMY-P60NKMU4 (For each connected branch box)

Number of connecting multi-position unit

Constraints

Any indoor units other than ducted unit are not connectable.

· The total system wide capacity should be 130% or below

including the ducted unit.

· Only 1 ducted unit can be included in the connection.

· The total system wide capacity should be 100% or

below including the ducted unit.

· Only 1 ducted unit can be included in the connection.

*3 For PUMY-P60NKMU4; When connecting the SEZ and PEAD-series units, the total system wide capacity per 1 branch box should be 100% or below including the ducted units. (Only if connecting to branch box)
*4 When not outside units 60: A branch box can connect to maximum 3 of the ducted units. When connecting with 3 of the ducted units per 1 branch box, other
indoor units cannot be connected. When outside units 60: A branch box can connect to maximum 2 of the ducted units. When connecting with 1 and over 1 of the ducted units, the total ability including of the ducted units is 100% and below 100%. *5 When 1 or more PLA-A EA or PAA-AA units is connected, the number of the maximum connectable indoor units is decreased as follows:
3 for PUMY-(H)P36, 4 for PUMY-HP42, and 6 for PUMY-(H)P48 and PUMY-P60 *6 Only PUMY-(H)P36/42/48 are connectable.

OCH811B

2-4. SYSTEM SPECIFICATIONS
(1) Outdoor Unit

Outdoor unit
Capacity

Model name
Cooling (kBtu/h) Heating (kBtu/h)

P36NKMU4 HP36NKMU2

HP42NKMU2
42 48

P48NKMU4 HP48NKMU2

P60NKMU4
60 66

Cooling/Heating capacity indicates the maximum value at operation under the following condition.

Cooling Heating

Indoor D.B. 80°F/W.B. 67°F: [D.B. 26.7°C/W.B. 19.4°C] Outdoor D.B. 95°F/W.B. 75°F: [D.B. 35°C/W.B. 23.9°C] Indoor D.B. 70°F/W.B. 60°F: [D.B. 21.1°C/W.B. 15.6°C] Outdoor D.B. 47°F/W.B. 43°F: [D.B. 8.3°C/W.B. 6.1°C]

(2) Method for identifying

Hyper-Heating INVERTER

Refrigerant R410A

PU M Y – H P 36 N K M U 4

Sub-number UL model

Frequency conversion controller

M-NET control Outdoor unit model type

MULTI-S

Power supply N: 1-phase 208/230 V, 60 Hz

Outdoor unit

Indicates equivalent to rated cooling capacity. (kBtu/h)

OCH811B

3 SPECIFICATIONS

Cooling

Service Ref.
Indoor type Capacity Rated*1 Rated power consumption*1
Current input (208/230V)
EER2
SEER2 Capacity Rated 47°F*1 Capacity Max. 17°F*2 Capacity Max. 5°F Rated power consumption 47°F*1
Current input (208/230V) COP 47°F*1
HSPF2 /
Power supply Breaker Size/Maximum over current protection

Heating

Minimum circuit ampacity

Indoor unit connectable

Total capacity Model/Quantity *3

Sound pressure level (measured in anechoic room)

Refrigerant piping diameter

Liquid pipe Gas pipe

Btu/h W A
Btu/h/W –
Btu/h Btu/h Btu/h
W A W/W –
CITY MULTI Branch box
dB <A>

PUMY-P36NKMU4

PUMY-P48NKMU4

Non-Ducted

Mix

Ducted

Non-Ducted

Mix

36,000

48,000

2,400

2,740

3,190

3,665

4,090

11.7/10.6

13.4/12.1

15.6/14.1

17.9/16.2

20.0/18.1

15.00

13.15

11.30

13.10

11.75

23.00

19.30

15.60

23.00

18.85

41,000

50,000

36,000

43,000

29,000

35,400

3,005

3,250

3,535

3,665

4,075

14.7/13.3

15.9/14.3

17.3/15.6

17.9/16.2

19.9/18.0

4.00

3.70

3.40

4.00

3.60

11.00/8.75

9.80/8.05

8.60/7.40

10.40/8.35

9.35/7.90

1-phase 208/230 V, 60 Hz

30 A/64 A (When power is supplied separately) 40 A/70 A (When power is supplied from the outdoor unit)

36 A (When power is supplied separately) 42 A (When power is supplied from the outdoor unit)

50 to 130% of outdoor unit capacity

04 – 36/11

04 – 54/12

06 – 36/4

06 – 36/8

49/53

51/54

Ducted 48,000 4,615 22.5/20.4 10.40 14.70 50,000 43,000 35,400 4,580 22.4/20.2
3.20 8.30/7.50

inch (mm) inch (mm)

3/8 (ø9.52) 5/8 (ø15.88)

Fan

Type × Quantity

Propeller fan × 2

Airflow rate

m³/min

110

L/s

1,834

cfm

3,885

Control, Driving mechanism

DC control

Motor output

0.074 × 2

External static press.

Compressor

Type × Quantity

Scroll hermetic compressor x 1

Manufacture

Mitsubishi Electric Corporation

Starting method

Inverter

Motor output

2.8

3.4

Case heater

Lubricant

FV50S 78oz. (2.3L)

External finish

Galvanized Steel Sheet <Munsell 3Y 7.8/ 1.1>

External dimension H × W × D

1,338 × 1,050 × 330 (+25)

inch

52-11/16 × 41-11/32 × 13 (+1)

Protection devices

High pressure protection Inverter circuit (COMP./FAN)

High pressure switch Overcurrent detection, Overheat detection (Heat sink thermistor)

Compressor protection

Compressor thermo, Overcurrent detection

Fan motor protection

Overheating/Voltage protection

Refrigerant

Type × original charge

R410A 10 lbs. 9 oz. (4.8kg)

Control

Linear Expansion Valve

Net weight

lb (kg)

271 (123)

Heat exchanger

Cross fin and tube

HIC circuit (HIC: Heat Inter-Changer)

HIC circuit

Defrosting method

Reversed refrigerant circuit

Guaranteed operation range

(Cooling)

D.B 23 to 115°F [ D.B.-5 to 46°C ] *4*5*6

(Heating)

W.B. -13 to 59°F [W.B. -25 to 15°C]

Remarks

Details on foundation work, duct work, insulation work, electrical wiring, power source switch, and

other items shall be referred to the Installation Manual.

Due to continuing improvement, above specifications may be subject to change without notice.

*1 Rating conditions Cooling Indoor : D.B. 80°F/W.B. 67 °F [D.B.26.7°C/W.B. 19.4°C]

*2 Conditions

Outdoor : D.B. 95°F [D.B. 35.0°C] Heating Indoor : D.B. 70°F [D.B. 21.1°C] Outdoor : D.B. 47°F/W.B. 43°F [D.B. 8.3°C/W.B. 6.1°C] Heating Indoor : D.B. 70°F [D.B. 21.1°C]

kcal/h = kW o 860 Conversion formula: Btu/h = kW o 3412
CFM = m3/min o 35.31

Outdoor : D.B. 17°F/W.B. 15°F [D.B. -8.3°C/W.B. -9.4°C]

*3 It cannot be connected mixed CITY MULTI indoor unit and branch box indoor unit.

*4 D.B. 5 to 115°F [D.B. -15 to 46°C], when an optional Air Outlet Guide is installed.

However, this condition does not apply to the indoor units listed in *5.

*5 50 to 115°F (10 to 46°C) D.B.: When connecting PKFY-P04/06/08/12NLMU, PFFY-P06/08/12NEMU, and PFFY-P06/08/12NRMU type indoor unit.

*6 When the temperature is below D.B. 50°F [D.B. 10°C] with branch box system, noise could potentially occur.

Note: Refer to the indoor unit’s service manual for the indoor units specifications.

OCH811B

Service Ref.

PUMY-HP36NKMU2

PUMY-HP42NKMU2

PUMY-HP48NKMU2

Indoor type Capacity Rated*1 Rated power consumption*1 Current input (208/230V)

Btu/h W A

Non-Ducted 36,000 2,400
11.7/10.6

Mix 36,000 2,740 13.4/12.1

Ducted 36,000 3,190 15.6/14.1

Non-Ducted 42,000 3,135
15.3/13.8

Mix 42,000 3,500 17.1/15.4

Ducted 42,000 3,965 19.4/17.5

Non-Ducted 48,000 3,665
17.9/16.2

Mix 48,000 4,090 20.0/18.1

Ducted 48,000 4,615 22.5/20.4

Cooling

EER2

Btu/h/W

15.00

13.15

11.30

13.40

12.00

10.60

13.10

11.75

10.40

Heating

SEER2 Capacity Rated 47°F*1 Capacity Max. 17°F*2 Capacity Max. 5°F Rated power consumption 47°F*1 Current input (208/230V) COP 47°F*1 HSPF2 /

Btu/h Btu/h Btu/h
W A W/W –

23.00

19.30

42,000

38,500

3,080

3,330

15.0/13.6 16.3/14.7

4.00

3.70

12.00/10.65 10.95/9.70

15.60 42,000 42,000 38,500 3,620 17.7/16.0
3.40 9.90/8.80

21.50

18.85

48,000 48,000

44,000 44,000

3,435

3,805

16.8/15.2 18.6/16.8

4.10

3.70

11.10/9.80 10.10/9.30

14.70 48,000 48,000 44,000 4,265 20.8/18.8
3.30 9.10/8.80

23.00

18.85

54,000 54,000

47,000 47,000

3,960

4,400

19.3/17.5 21.5/19.4

4.00

3.60

11.50/9.80 10.15/9.05

14.70 54,000 54,000 47,000 4,950 24.2/21.8
3.20 8.80/8.30

Power supply

1-phase 208/230 V, 60 Hz

Breaker Size/Maximum over current protection

40 A/80 A (When power is supplied separately) 45 A/86 A (When power is supplied from the outdoor unit)

Minimum circuit ampacity

45 A (When power is supplied separately) 51 A (When power is supplied from the outdoor unit)

Indoor unit connectable

Total capacity Model/Quantity *3

Sound pressure level (measured in anechoic room)

CITY MULTI Branch box
dB <A>

04 – 36/11 06 – 36/4
49/53

50 to 130% of outdoor unit capacity 04 – 54/12 06 – 36/5
50/54

04 – 54/12 06 – 36/8
51/54

Refrigerant

Liquid pipe

piping diameter Gas pipe

inch (mm) inch (mm)

3/8 (ø9.52) 5/8 (ø15.88)

Fan

Type × Quantity

Propeller fan × 2

Airflow rate

m³/min L/s

110 1,834

cfm

3,885

Control, Driving mechanism

DC control

Motor output

0.074 × 2

Compressor

External static press. Type × Quantity

0 Scroll hermetic compressor × 1

Manufacture

Mitsubishi Electric Corporation

Starting method

Inverter

Motor output

2.8

2.9

3.4

Case heater

Lubricant

FV50S 78oz. (2.3L)

External finish

External dimension H × W × D

inch

Galvanized Steel Sheet <Munsell 3Y 7.8/ 1.1> 1,338 × 1,050 × 330 (+25)
52-11/16 × 41-11/32 × 13 (+1)

Protection devices

High pressure protection Inverter circuit (COMP./FAN)

High pressure switch Overcurrent detection, Overheat detection (Heat sink thermistor)

Compressor protection

Compressor thermo, Overcurrent detection

Fan motor protection

Overheating/Voltage protection

Refrigerant Net weight

Type x original charge Control
lb (kg)

R410A 10 lbs. 9 oz. (4.8kg) Linear Expansion Valve 278 (126)

Heat exchanger HIC circuit (HIC: Heat Inter-Changer)

Cross fin and tube HIC circuit

Defrosting method Guaranteed operation range

(Cooling) (Heating)

Reversed refrigerant circuit D.B 23 to 115°F [D.B.-5 to 46°C] *4*5*6
W.B. -13 to 59°F [W.B. -25 to 15°C]

Remarks

Details on foundation work, duct work, insulation work, electrical wiring, power source switch, and other items shall be referred to the Installation Manual. Due to continuing improvement, above specifications may be subject to change without notice.

*1 Rating conditions *2 Conditions

Cooling Indoor : D.B. 80°F/W.B. 67 °F [D.B.26.7°C/W.B. 19.4°C] Outdoor : D.B. 95°F [D.B. 35.0°C] Heating Indoor : D.B. 70°F [D.B. 21.1°C] Outdoor : D.B. 47°F/W.B. 43°F [D.B. 8.3°C/W.B. 6.1°C] Heating Indoor : D.B. 70°F [D.B. 21.1°C]

kcal/h = kW o 860 Conversion formula: Btu/h = kW o 3412
CFM = m3/min o 35.31

Outdoor : D.B. 17°F/W.B. 15°F [D.B. -8.3°C/W.B. -9.4°C]

*3 It cannot be connected mixed CITY MULTI indoor unit and branch box indoor unit.

*4 D.B. 5 to 115°F [D.B. -15 to 46°C], when an optional Air Outlet Guide is installed.

However, this condition does not apply to the indoor units listed in *5.

*5 50 to 115°F (10 to 46°C)D.B.: When connecting PKFY-P04/06/08/12NLMU, PFFY-P06/08/12NEMU, and PFFY-P06/08/12NRMU type indoor unit.

*6 When the temperature is below D.B. 50°F [D.B. 10°C] with branch box system, noise could potentially occur.

Note: Refer to the indoor unit’s service manual for the indoor units specifications.

OCH811B

Service Ref.

PUMY-P60NKMU4

Indoor type Capacity Rated*1 Rated power consumption*1

Btu/h W

Non-Ducted 60,000 4,515

Mix 60,000 5,065

Ducted 60,000 5,770

Cooling

Current input (208/230V)

21.9/19.8

24.6/22.3

28.0/25.4

EER2

Btu/h/W

13.30

11.85

10.40

SEER2

–

20.00

17.75

15.50

Capacity Rated 47°F*1 Capacity Max. 17°F*2

Btu/h Btu/h

66,000 65,000

Heating

Capacity Max. 5°F Rated power consumption 47°F*1

Btu/h W

46,500 4,720

46,500 5,175

46,500 5,690

Current input (208/230V)

22.9/20.7

25.2/22.8

27.7/25.0

COP 47°F*1

W/W

4.10

3.74

3.40

HSPF2 /

–

10.50/8.65

9.55/8.05

8.60/7.45

Power supply

1-phase 208/230 V, 60 Hz

Breaker Size/Maximum over current protection

40 A/80 A (When power is supplied separately) 50 A/90 A (When power is supplied from the outdoor unit)

Minimum circuit ampacity

45 A (When power is supplied separately) 55 A (When power is supplied from the outdoor unit)

Indoor unit connectable

Total capacity Model/Quantity*3

CITY MULTI

50 to 130% of outdoor unit capacity 04 – 72 /12

Branch box

06 – 36 / 8

Sound pressure level (measured in anechoic room)

dB <A>

58/59

Refrigerant piping diameter

Liquid pipe Gas pipe

inch (mm) inch (mm)

3/8 (ø9.52) 3/4 (ø19.05)

Fan

Type × Quantity

Propeller fan × 2

Airflow rate

m³/min

138

L/s

2,300

cfm

4,879

Control, Driving mechanism

DC control

Motor output

0.200 × 2

External static press.

Compressor

Type × Quantity

Scroll hermetic compressor x 1

Manufacture

Mitsubishi Electric Corporation

Starting method

Inverter

Motor output

3.9

Case heater

Lubricant

FVC68D 78oz. (2.3L)

External finish

Galvanized Steel Sheet <Munsell 3Y 7.8/ 1.1>

External dimension H × W × D

1,338 × 1,050 × 330 (+25)

inch

52-11/16 × 41-11/32 × 13 (+1)

Protection devices

High pressure protection Inverter circuit (COMP./FAN)

High pressure switch Overcurrent detection, Overheat detection(Heat sink thermistor)

Compressor protection

Compressor thermo, Overcurrent detection

Fan motor protection

Overheating/Voltage protection

Refrigerant

Type x original charge

R410A 11 lbs. 4 oz. (5.1kg)

Control

Linear Expansion Valve

Net weight

lb (kg)

300 (136)

Heat exchanger

Cross fin and tube

HIC circuit (HIC: Heat Inter-Changer)

HIC circuit

Defrosting method Guaranteed operation range

(Cooling)

Reversed refrigerant circuit D.B 23 to 115°F [D.B.-5 to 46°C] *4*5*6

(Heating)

W.B. -13 to 59°F [W.B. -25 to 15°C]

Remarks

Details on foundation work, duct work, insulation work, electrical wiring, power source switch, and

other items shall be referred to the Installation Manual.

Due to continuing improvement, above specifications may be subject to change without notice.

*1 Rating conditions *2 Conditions

kcal/h = kW o 860 Conversion formula: Btu/h = kW o 3412
CFM = m3/min o 35.31

Outdoor : D.B. 17°F/W.B. 15°F [D.B. -8.3°C/W.B. -9.4°C]

*3 It cannot be connected mixed CITY MULTI indoor unit and branch box indoor unit.

*4 D.B. 5 to 115°F [D.B. -15 to 46°C], when an optional Air Outlet Guide is installed.

However, this condition does not apply to the indoor units listed in *5.

*5 50 to 115°F (10 to 46°C) D.B.: When connecting PKFY-P04/06/08/12NLMU, PFFY-P06/08/12NEMU, and PFFY-P06/08/12NRMU type indoor unit.

*6 When the temperature is below D.B. 50°F [D.B. 10°C] with branch box system, noise could potentially occur.

Note: Refer to the indoor unit’s service manual for the indoor units specifications.

OCH811B

4 DATA

4-1. SELECTION OF COOLING/HEATING UNITS
How to determine the capacity when less than or equal 100% indoor model size units are connected in total:
The purpose of this flow chart is to select the indoor and outdoor units. For other purposes, this flow chart is intended only for reference.
Determine the load (L) and the Indoor/Outdoor Temperature
Temporarily select the Indoor/Outdoor Units

Reselect the indoor units Reselect the outdoor units

Indoor Unit

Total Indoor Units Capacity (CTi) = (Individual Rated Indoor Unit Capacity CTik ×

k=1

Individual Indoor Temperature Correction Coef. k) (Figure 1, 4)

n: Total Number of Indoor Units k: Indoor Unit Number

Outdoor Unit *1 Outdoor Unit Capacity (CTo) = Rated Outdoor Unit Capacity × Outdoor Temperature Correction Coef. (Figure 2, 5) × Piping Length
Correction Coef. (Figure 3, 6) × Defrost Correction Coef. (in heating operation, Table 1)

(If indoor to outdoor connectable capacity ratio is less than 100%, the capacity correction is set as 100% )

Capacity Determination

CTo CTi

Yes Maximum Capacity(CTmax) = CTo

No L CTo

Yes

Want to change to smaller

indoor units?

CTik × k

Individual Indoor Unit Capacity: CT’ik= CTmax ×

(CTim

m=1

Maximum Capacity(CTmax) = CTi

L CTi

Yes

Need to select smaller

Yes

outdoor unit?

No
No Does it fulfill the load of
each room?

Yes

Input Calculation

Does it fulfill the load of

each room?

Yes Completed Selecting Units

Completed Selecting Units

*ck: Outdoor unit power input coefficient of k indoor unit room temp. (Refer to 4-2.) *Mk: Number part of the k indoor unit model (e.g. P80 80)

Average Indoor temp. power input Coef. (cave)

cave

{ck

(Mk/

Mk)}

k=1

Average Indoor temp. power input Coef. (cave)

cave

{ck

(Mk/

Mk)}

k=1

Outdoor Unit Input = Rated Outdoor Unit Input × cave

Outdoor Unit Input = Rated Outdoor Unit Input × cave
× (CTi )
(x) is the approximate correction function when less than or equal 100% model size units are input as connected.

OCH811B

How to determine the capacity when greater than 100% indoor model size units are connected in total:
The purpose of this flow chart is to select the indoor and outdoor units. For other purposes, this flow chart is intended only for reference.
Determine the load (L) and the Indoor/Outdoor Temperature
Temporarily select the indoor/outdoor units

Reselect the indoor units

Reselect the outdoor units

Indoor Unit

Total Indoor Units Capacity (CTi) = (Individual Rated Indoor Unit Capacity CTik ×

k=1

Individual Indoor Temperature Correction Coef. k) (Figure 1, 4)

n: Total Number of Indoor Units k: Indoor Unit Number

Outdoor Unit *1 Outdoor Unit Capacity (CTo) = Rated Outdoor Unit Capacity × (CT i)
× Outdoor Temperature Correction Coef. (Figure 2, 5) × Piping Length Correction Coef. (Figure 3, 6) × Defrost Correction Coef. (in heating, Table 1)

(x) is the approximate correction function when greater than 100% model size units are connected.
(x) refers to STANDARD CAPACITY DIAGRAM.

No CTo CTi
Yes Maximum Capacity(CTmax) = CTo

Maximum Capacity(CTmax) = CTi No
L CTi

Input Calculation

No L CTo

Yes

Want to change to smaller

indoor units?

CTik × k

Individual Indoor Unit Capacity: CT’ik= CTmax ×

(CTim

m=1

Yes

Need to select smaller

Yes

outdoor unit?

No
No Does it fulfill the load of
each room?

Yes Completed Selecting Units

Does it fulfill the load of

each room?

Yes Completed Selecting Units

Rated Outdoor Unit Capacity < Total Indoor Units Capacity

*ck: Outdoor unit power input coefficient of k indoor unit room temp. (Refer to 4-2.) *Mk: Number part of the k indoor unit model (e.g. P80 80)

Yes

Outdoor Unit Input

= Rated Outdoor Unit Input ×

Outdoor Temperature

Correction Coef.

× (CTi )

(x) is the approximate correction function when less than or equal 100% model size units are input as connected.

Average Indoor temp. power input Coef. (cave)

cave

{ck

(Mk/

Mk)}

k=1

Average Indoor temp. power input Coef. (cave)

= {ck × (Mk/ Mk)}

k=1

Outdoor Unit Input =Rated Outdoor Unit Input × cave
× (CTi )

Outdoor Unit Input = Rated Outdoor Unit Input × cave
× (CTi )

(x) is the approximate correction function when greater than 100% model size units are input as connected.

OCH811B

<Cooling>
Design Condition Outdoor Design Dry Bulb Temperature Total Cooling Load Room1
Indoor Design Dry Bulb Temperature Indoor Design Wet Bulb Temperature Cooling Load Room2 Indoor Design Dry Bulb Temperature Indoor Design Wet Bulb Temperature Cooling Load <Other> Indoor/Outdoor Equivalent Piping Length
Capacity of indoor unit <P·FY series>

98.6ºF (37.0ºC) 30.3 kBtu/h
80.6ºF (27.0ºC) 68.0ºF (20.0ºC)
13.6 kBtu/h
75.2ºF (24.0ºC) 66.2ºF (19.0ºC)
16.7 kBtu/h
250 ft

(kBtu/h)

Model Number for indoor unit

Model 04

Model 05

Model 06

Model 08

Model 12

Model 15

Model 18

Model 24

Model 27

Model 30

Model 36

Model 48

Model 54

Model 72

Model Capacity

4.0

5.0

6.0

8.0

12.0

15.0

18.0

24.0

27.0

30.0

36.0

48.0

54.0

72.0

<M,S,P series>

Model name

Capacity class 06 09 12 15 18 24 30 36

SVZ

–

– 12.0 – 18.0 24.0 30.0 36.0

SLZ-KF

–

8.4 11.1 15.0 –

–

SEZ-KD

–

8.1 11.5 14.1 17.2 –

–

MFZ-KJ

–

9.0 12.0 15.0 17.0 –

–

MLZ-KP

–

9.0 12.0 – 17.2 –

–

MLZ-KY 6.0

–

MSZ-FH 6.0 9.0 12.0 15.0 17.2 –

–

MSZ-FS 6.0 9.0 12.0 15.0 17.2 –

–

MSZ-GL 6.0 9.0 12.0 14.0 17.2 22.5 –

–

MSZ-GS 6.0 9.0 12.0 14.0 18.0 22.4 –

–

MSZ-EF

–

9.0 12.0 15.0 18.0 –

–

PEAD

–

9.0 12.0 15.0 18.0 24.0 30.0 36.0

PLA

–

– 12.0 – 18.0 24.0 30.0 36.0

PAA-A

–

– 18.0 24.0 30.0 36.0

1. Cooling Calculation

(1) Temporary Selection of Indoor Units

1.2

Room1

PEFY-P15

15.0 kBtu/h (Rated)

1.0

Ratio of cooling capacity

Room2

0.8

PEFY-P18

18.0 kBtu/h (Rated)

0.6

(2) Total Indoor Units Capacity P15+ P18 = P33

(3) Selection of Outdoor Unit The P36 outdoor unit is selected as total indoor units capacity is P33

PUMY-P36NKMU4

36.0 kBtu/h

(4) Total Indoor Units Capacity Correction Calculation Room1 Indoor Design Wet Bulb Temperature Correction (68.0ºF) Room2 Indoor Design Wet Bulb Temperature Correction (66.2ºF)

1.02 (Refer to Figure 1) 0.95 (Refer to Figure 1)

Total Indoor Units Capacity (CTi)

CTi = (Indoor Unit Rating × Indoor Design Temperature Correction) = 15.0 × 1.02 + 18.0 × 0.95 = 32.4 kBtu/h
(5) Outdoor Unit Correction Calculation

Outdoor Design Dry Bulb Temperature Correction (98.6ºF)

0.98 (Refer to Figure 2)

Piping Length Correction (250 ft)

0.93 (Refer to Figure 3)

Total Outdoor Unit Capacity (CTo) CTo = Outdoor Rating × G(CTi)*1 × Outdoor Design Temperature Correction
× Piping Length Correction = 36.0 × 0.98 × 0.93 = 32.8 kBtu/h
*1 G(CTi) is used only when greater than 100% indoor model size are connected in total, refer to STANDARD CAPACITY DIAGRAM.

0.459 15

60.8 62.6 64.4 66.2 68 69.8 71.6 73.4 75.2 [°FW.B.] 16 17 18 19 20 21 22 23 24 [°CW.B.] Indoor Temperature

Figure 1 Indoor unit temperature correction
To be used to correct indoor unit only

1.4

Indoor

1.3

Temperature

Ratio of cooling capacity

1.2

1.1

1.0

0.9

19.4°C (67.0°F) W.B

0.8

0.7

0.6

0.5 5

95 104 113 [°F D.B.]

-15 -10 -5

45 [°C D.B.]

Outdoor Temperature

Figure 2 Outdoor unit temperature correction

To be used to correct outdoor unit only

Capacity ratio

1.00 0.95 0.90 0.85 0.80 0.75 0.70 0.65 0.60 0.55 0.50
0

Total capacity of indoor unit 18 [kBtu/h] 27 [kBtu/h] 36 [kBtu/h] 46.8 [kBtu/h] 50 100 150 200 250 300 350 400 450 500 550 600 Piping equivalent length (ft)

Figure 3 Correction of refrigerant piping length

(6) Determination of Maximum System Capacity

Comparison of Capacity between Total Indoor Units Capacity (CTi) and Total Outdoor Unit Capacity (CTo)

CTi = 32.4 < CTo = 32.8, thus, select CTi.

CTx = CTi = 32.4 kBtu/h

OCH811B

(7) Comparison with Essential Load Against the essential load 30.3 kBtu/h, the maximum system capacity is 32.4 kBtu/h: Proper outdoor units have been selected.

(8) Calculation of Maximum Indoor Unit Capacity of Each Room

CTx = CTi, thus, calculate by the calculation below

Room1

Indoor Unit Rating × Indoor Design Temperature Correction

= 15.0 × 1.02

= 15.3 kBtu/h

OK: fulfills the load 13.6 kBtu/h

Room2

Indoor Unit Rating × Indoor Design Temperature Correction

= 18.0 × 0.95

= 17.1 kBtu/h

OK: fulfills the load 16.7 kBtu/h

Go on to the heating trial calculation since the selected units fulfill the cooling loads of Room 1, 2.

<Heating>
Design Condition
Outdoor Design Wet Bulb Temperature Total Heating Load Room1
Indoor Design Dry Bulb Temperature Heating Load Room2 Indoor Design Dry Bulb Temperature Heating Load <Other> Indoor/Outdoor Equivalent Piping Length

35.6ºF (2.0ºC) 34.0 kBtu/h
69.8ºF (21.0ºC) 16.3 kBtu/h
73.4ºF (23.0ºC) 17.7 kBtu/h
328 ft

Capacity of indoor unit

(kBtu/h)

<P·FY series>

Model Number for indoor unit
Model Capacity

Model 04 Model 05 Model 06 Model 08 Model 12 Model 15 Model 18 Model 24 Model 27 Model 30 Model 36 Model 48 Model 54

4.5

5.6

6.7

9.0

13.5

17.0

20.0

27.0

30.0

34.0

40.0

54.0

60.0

<M,S,P series>

Model name
SVZ SLZ-KF SEZ-KD MFZ-KJ MLZ-KP MLZ-KY MSZ-FH MSZ-FS MSZ-GL MSZ-GS MSZ-EF PEAD PLA PAA-A

Capacity class

06 09 12 15 18 24 30 36

–

– 12.0 – 18.0 27.0 34.0 40.0

– 10.2 13.7 17.1 –

–

– 10.9 13.6 18.0 17.2 –

–

– 10.9 13.0 18.0 21.0 –

–

– 10.9 13.0 – 21.0 –

–

7.2

–

8.7 10.9 13.6 18.0 20.3 –

–

8.7 10.9 13.6 18.0 20.3 –

–

7.2 10.9 14.4 18.0 21.6 27.6 –

–

7.2 10.9 14.4 18.0 21.6 27.6 –

–

– 10.9 13.0 18.0 21.0 –

–

– 10.9 13.5 15.7 18.0 26.0 34.0 40.0

–

– 13.5 – 18.0 26.0 34.0 40.0

–

– 19.0 26.0 32.0 38.0

OCH811B

2. Heating Calculation

(1) Temporary Selection of Indoor Units

Room1

PEFY-P15

17.0 kBtu/h (Rated)

Room2

PEFY-P18

20.0 kBtu/h (Rated)

(2) Total Indoor Units Capacity

P15 + P18 = P33

(3) Selection of Outdoor Unit

The P36 outdoor unit is selected as total indoor units capacity is P33

PUMY-P36NKMU4

41.0 kBtu/h

(4) Total Indoor Units Capacity Correction Calculation

Room1

Indoor Design Dry Bulb Temperature Correction (69.8ºF)

Room2

Indoor Design Dry Bulb Temperature Correction (73.4ºF)

1.00 (Refer to Figure 4) 0.92 (Refer to Figure 4)

Total Indoor Units Capacity (CTi)
CTi = (Indoor Unit Rating × Indoor Design Temperature Correction) = 17.0 × 1.00 + 20.0 × 0.92 = 35.4 kBtu/h

Ratio of heating capacity

1.3
1.2
1.1
1.0
0.9
0.8
0.7
0.6 59 60.8 62.6 64.4 66.2 68 69.8 71.6 73.4 75.2 77 78.8 80.6 [°F D.B.] 15 16 17 18 19 20 21 22 23 24 25 26 27 [°C D.B.] Indoor Temperature
Figure 4 Indoor unit temperature correction
To be used to correct indoor unit only

Ratio of heating capacity

1.4 1.3 1.2

1.1 1.0 0.9

0.8

0.7

0.6

0.5

0.4

-13

-4

-25

-20

-15

-10

-5

Outdoor Temperature

Indoor Temperature
21.1°C (70.0°F) D.B.

59 [°F W.B.]

15 [°C W.B.]

Figure 5 Outdoor unit temperature correction
To be used to correct outdoor unit only

(5) Outdoor Unit Correction Calculation Outdoor Design Wet Bulb Temperature Correction (35.6ºF) Piping Length Correction (328 ft) Defrost Correction

1.00
1.0 (Refer to Figure 5) 0.94 (Refer to Figure 6) 0.95 0.89 (Refer to Table 1) 0.90

Total capacity of indoor unit

Capacity ratio

Total Outdoor Unit Capacity (CTo)

0.85

CTo = Outdoor Unit Rating × G(CTi)*1× Outdoor Design Temperature Correction 0.80 × Piping Length Correction × Defrost Correction

= 41.0 × 1.0 × 0.94 × 0.89

0.75

= 34.3 kBtu/h 0.70

*1 G(CTi) is used only when greater than 100% indoor model size are connected in total,

50 100 150 200 250 300 350 400 450 500 550 600

refer to STANDARD CAPACITY DIAGRAM.

Piping equivalent length (ft)

Table 1 Table of correction factor at frost and defrost

Figure 6 Correction of refrigerant piping length

Outdoor Intake temperature <W.B.°F (°C)> 43(6) 37(4) 36(2) 32(0) 28(-2) 25(-4) 21(-6) 18(-8) 14(-10) 5(-15) -4(-20) -13(-25)

Correction factor

1.00 0.98 0.89 0.88 0.89 0.90 0.95 0.95 0.95 0.95 0.95 0.95

(6) Determination of Maximum System Capacity Comparison of Capacity between Total Indoor Units Capacity (CTi) and Total Outdoor Unit Capacity (CTo)

CTi = 35.4 > CTo = 34.3, thus, select CTo.

CTx = CTo = 34.3 kBtu/h

(7) Comparison with Essential Load

Against the essential load 34.0 kBtu/h, the maximum system capacity is 34.3 kBtu/h: Proper outdoor units have been selected.

(8) Calculation of Maximum Indoor Unit Capacity of Each Room

CTx = CTo, thus, calculate by the calculation below

Room1

Maximum Capacity × Room1 Capacity after the Temperature Correction/(Room1,2 Total Capacity after the Temperature Correction

= 34.3 × (17.0 × 1.00) / (17.0 × 1.00 + 20.0 × 0.92)

= 16.5 kBtu/h

OK: fulfills the load 16.3 kBtu/h

Room2

Maximum Capacity × Room1 Capacity after the Temperature Correction/(Room1,2 Total Capacity after the Temperature Correction

= 34.3 × (20.0 × 0.92) / (17.0 × 1.00 + 20.0 × 0.92)

= 17.8 kBtu/h

OK: fulfills the load 17.7 kBtu/h

Completed selecting units since the selected units fulfill the heating loads of Room 1, 2.

OCH811B

3. Power input of outdoor unit Outdoor unit: PUMY-P36NKMU4 Indoor unit 1: PEFY-P15 Indoor unit 2: PEFY-P18
<Cooling>
(1) Rated power input of outdoor unit

2.40 kW

(2) Calculation of the average indoor temperature power input coefficient
Coefficient of the outdoor unit for indoor unit 1 (Outdoor temp. 98.6°F [37.0°C] D.B., Indoor temp. 68.0°F [20.0°C] W.B.) 1.04 (Refer to “4-2. CORRECTION BY TEMPERATURE”.)
Coefficient of the outdoor unit for indoor unit 2 (Outdoor temp. 98.6°F [37.0°C] D.B., Indoor temp. 64.4°F [18.0°C] W.B.) 0.85 (Refer to “4-2. CORRECTION BY TEMPERATURE”.)

Average

indoor

temp.

power

input

coefficient

(cave)

{ck

(Mk/

Mk)}

k=1

n: Total number of the indoor units k: Number of the indoor unit c k : Outdoor unit power input coefficient of k indoor unit room temp. Mk: Number part of the k indoor unit model (e.g. P80 80)

Correction Coefficient of Indoor temperature = 1.04 × 15/(15 + 18) + 0.85 × 18/(15 + 18) = 0.94

(3) Coefficient of the partial load (CTi)
Total Indoor units capacity 15 + 18 = 33, thus, (CTi) = 0.9 (Refer to the tables in “4-4.STANDARD CAPACITY DIAGRAM”.)
(4) Outdoor power input (PIo)
Maximum System Capacity (CTx) = Total Outdoor unit Capacity (CTo), so use the following formula PIo = Outdoor unit Cooling Rated Power Input × Correction Coefficient of Indoor temperature × (CTi)
= 2.40 × 0.94 × 0.9 = 2.03 kW
<Heating>

(1) Rated power input of outdoor unit

3.01 kW

(2) Calculation of the average indoor temperature power input coefficient
Coefficient of the outdoor unit for indoor unit 1 (Outdoor temp. 26.6°F [-3°C] W.B., Indoor temp. 70°F [21.1°C] D.B.) 1.16 (Refer to “4-2. CORRECTION BY TEMPERATURE”.)
Coefficient of the outdoor unit for indoor unit 2 (Outdoor temp. 26.6°F [-3°C] W.B., Indoor temp. 78.8°F [26°C] D.B.) 1.09 (Refer to “4-2. CORRECTION BY TEMPERATURE”.)

Average indoor temp. power input coefficient (cave) = {ck × (Mk/ Mk)}

k=1

n: Total number of the indoor units k: Number of the indoor unit c k : Outdoor unit power input coefficient of k indoor unit room temp. Mk : Number part of the k indoor unit model (e.g. P80 80)

Correction Coefficient of Indoor temperature = 1.16 × 15/(15 + 18) + 1.09 × 18/(15 + 18) = 1.12

(3) Coefficient of the partial load (CTi)
Total indoor units capacity 15 + 18 = 33, thus, (CTi) = 0.9 (Refer to the tables in “4-4. STANDARD CAPACITY DIAGRAM”.)
(4) Outdoor power input (PIo)
Maximum System Capacity (CTx) = Total Indoor unit Capacity (CTi), so use the following formula PIo = Outdoor unit Heating Rated Power Input × Correction Coefficient of Indoor temperature × (CTi)
= 3.01 × 1.12 × 0.9 = 3.03 kW

OCH811B

4-2. CORRECTION BY TEMPERATURE
CITY MULTI could have varied capacity at different designing temperature. Using the nominal cooling/heating capacity value and the ratio below, the capacity can be observed at various temperature.
<Cooling>
Figure 7 Indoor unit temperature correction To be used to correct indoor unit capacity only

Ratio of cooling capacity

1.2

1.0

0.8

0.6

0.459 15

60.8 62.6 64.4 66.2 68 69.8 71.6 73.4 75.2 [°FW.B.] 16 17 18 19 20 21 22 23 24 [°CW.B.] Indoor Temperature

Figure 8 Outdoor unit temperature correction To be used to correct outdoor unit capacity only

Ratio of cooling capacity

1.3 1.2 1.1 1.0 0.9 0.8 0.7 0.6 0.5 0.4 5
-15
1.2
1.0

Indoor Temperature 67.0°F (19.4°C) W.B.

-10

-5

Outdoor Temperature

68.0°F (20.0°C) W.B. 75.2°F (24.0°C) W.B. 72.0°F (22.0°C) W.B.

104

113 [°F D.B.]

45 [°C D.B.]

Indoor Temperature

Ratio of power input

0.8

0.6

67.0°F (19.4°C) W.B.

64.0°F (18.0°C) W.B.

0.4

61.0°F (16.0°C) W.B.

0.2

0.0 5

104

113 115 [°F D.B.]

-15

-10

-5

45 46 [°C D.B.]

Outdoor Temperature

OCH811B

<Heating>
PUMY-P36NKMU4

PUMY-P48NKMU4

Figure 9 Indoor unit temperature correction To be used to correct indoor unit capacity only

PUMY-P60NKMU4

Ratio of heating capacity

1.3 1.2 1.1 1.0 0.9 0.8 0.7 0.6
59 60.8 62.6 64.4 66.2 68 69.8 71.6 73.4 75.2 77 78.8 80.6 [°F D.B.] 15 16 17 18 19 20 21 22 23 24 25 26 27 [°C D.B.] Indoor Temperature
Figure 10 Outdoor unit temperature correction To be used to correct outdoor unit capacity only

Ratio of heating capacity 1*

Indoor Temperature
1.4

1.3

1.2

1.1

70.0°F (21.1°C) D.B.

1.0

0.9

0.8 0.7

0.6

0.5

0.4

-13

-4

59 [°F W.B.]

-25

-20

-15

-10

-5

15 [°C W.B.]

Outdoor Temperature

*1 Ratio of heating capacity vary according to connected indoor unit combinations, this chart shows the

minimum ratio of heating capacity.

Indoor Temperature

1.4

1.2 1.0

0.8 70.0°F (21.1°C) D.B.

0.6

61.0°F (16.0°C) D.B.

79.0°F (26.0°C) D.B. 0.4

0.2

0.0

-13

-4

59 [°F W.B.]

-25

-20

-15

-10

-5

15 [°C W.B.]

Outdoor Temperature

Ratio of power input

OCH811B

<Heating>
PUMY-HP36NKMU2

PUMY-HP42NKMU2

Figure 11 Indoor unit temperature correction To be used to correct indoor unit capacity only

PUMY-HP48NKMU2

Ratio of heating capacity

1.3 1.2 1.1 1.0 0.9 0.8 0.7 0.6
59 60.8 62.6 64.4 66.2 68 69.8 71.6 73.4 75.2 77 78.8 80.6 [°F D.B.] 15 16 17 18 19 20 21 22 23 24 25 26 27 [°C D.B.] Indoor Temperature

Figure 12 Outdoor unit temperature correction To be used to correct outdoor unit capacity only

Ratio of heating capacity

1.4

1.3

1.2

1.1

1.0

0.9

0.8

0.7

0.6

0.5

0.4

-13

-4

-25

-20

-15

-10

-5

Outdoor Temperature

1.8 1.6

Indoor Temperature

59 [°F W.B.]

15 [°C W.B.]

Indoor Temperature

Ratio of power input

1.4

1.2 1.0

0.8

70.0°F (21.1°C) D.B.

0.6

61.0°F (16.0°C) D.B.

79.0°F (26.0°C) D.B.

0.4

-13

-4

59 [°F W.B.]

-25

-20

-15

-10

-5

15 [°C W.B.]

Outdoor Temperature

OCH811B

4-3. STANDARD OPERATION DATA (REFERENCE DATA)

Operation

PUMY-P36NKMU4

PUMY-P48NKMU4

PUMY-P60NKMU4

Operating Ambient Indoor conditions temperature
Outdoor

DB/WB

80°F/67°F [26.7°C / 19.4°C]

70°F/60°F

80°F/67°F

70°F/60°F

80°F/67°F

70°F/60°F

[21.1°C/15.6°C] [26.7°C/19.4°C] [21.1°C/15.6°C] [26.7°C/19.4°C] [21.1°C/15.6°C]

95°F/75°F

47°F / 43°F

[35.0°C/23.9°C] [8.3°C/6.1°C]

95°F/ 75°F [35.0°C / 23.9°C]

47°F/43°F

95°F/75°F

47°F/43°F

[8.3°C/6.1°C] [35.0°C/23.9°C] [8.3°C/6.1°C]

Indoor unit No. of connected units Unit

No. of units in operation

Piping

Model Main pipe

12 × 3

9.84 (3)

12 × 4 9.84 (3)

15 × 4 9.84 (3)

Branch pipe

Ft (m)

14.76 (4.5)

Total pipe length

54.13 (16.5)

68.90 (21)

Fan speed

Amount of refrigerant

LBS. OZ. (kg)

17 LBS. (7.7)

17 LBS. 3 OZ. (7.8)

19 LBS. 6 OZ. (8.8)

Outdoor Electric current

unit

Voltage

10.2

13.3

230

15.6

17.1

230

19.3

20.4

230

Compressor frequency

LEV

Indoor unit

opening

Pulse

268

438

247

313

386

498

Pressure High pressure/Low pressure

PSIG [MPaG]

370/159 [2.55/1.10]

306/104 [2.11/0.72]

415/159 [2.86/1.09]

315/97 [2.17/0.67]

397/144 [2.75/1.02]

330/98 [2.28/0.68]

Temp. of Outdoor

each

unit

section

Discharge Heat exchanger outlet Accumulator inlet Compressor inlet

°F[°C]

139.1 [59.5] 101.3 [38.5] 56.7 [13.7] 62.8 [17.1]

118.9 [48.3] 34.3 [1.3] 33.4 [0.8] 33.6 [0.9]

149.5 [65.3] 102.2 [39.0] 57.6 [14.2] 60.4 [15.8]

135.9 [57.7] 32.2 [0.1] 31.3 [-0.4] 32.7 [0.4]

143.2 [61.8] 102.9 [39.4] 52.3 [11.3] 53.8 [12.1]

121.1 [49.5] 32.9 [0.5] 32.3 [0.1] 31.6 [-0.2]

Indoor unit Lev inlet

73.8 [23.2]

81.4 [27.4]

68.4 [20.2]

75.2 [24.0]

85.3 [29.6]

84.6 [29.2]

Heat exchanger inlet

68.2 [20.1]

71.4 [21.9]

67.9 [19.9]

127.8 [53.2]

84.2 [29.0]

113.9 [45.5]

Operation

PUMY-HP36NKMU2

PUMY-HP42NKMU2

PUMY-HP48NKMU2

Operating Ambient Indoor conditions temperature
Outdoor

DB/WB

80°F/67°F

70°F/60°F

80°F/67°F

70°F/60°F

80°F/67°F

70°F/60°F

[26.7°C/19.4°C] [21.1°C/15.6°C] [26.7°C/19.4°C] [21.1°C/15.6°C] [26.7°C/19.4°C] [21.1°C/15.6°C]

95°F/75°F

47°F / 43°F

95°F/ 75°F

47°F/43°F

95°F/ 75°F

47°F/43°F

[35.0°C/23.9°C] [8.3°C/6.1°C] [35.0°C/23.9°C] [8.3°C/6.1°C] [35.0°C/23.9°C] [8.3°C/6.1°C]

Indoor unit No. of connected units

No. of units in operation Unit

Piping

Model Main pipe

12 × 3

9.84 (3)

12 × 2 + 18 × 1 9.84 (3)

12 × 4 9.84 (3)

Branch pipe

Ft (m)

14.76 (4.5)

Total pipe length

54.13 (16.5)

68.90 (21)

Fan speed

Amount of refrigerant

LBS. OZ. (kg)

17 LBS. (7.7)

17 LBS. 3 OZ. (7.8)

Outdoor Electric current

unit

Voltage

10.2

13.3

230

13.4

14.8

230

15.6

17.1

230

Compressor frequency

LEV

Indoor unit

opening

Pulse

268

438

299/414

348/520

247

313

Pressure High pressure/Low pressure

PSIG [MPaG]

370/159 [2.55/1.10]

306/104 [2.11/0.72]

419/155 [2.89/1.17]

347/115 [2.39/0.79]

415/159 [2.86/1.09]

316/96 [2.18/0.66]

Temp. of each section

Outdoor unit
Indoor unit

Discharge Heat exchanger outlet Accumulator inlet Compressor inlet Lev inlet

°F[°C]

139.1 [59.5] 101.3 [38.5] 56.7 [13.7] 62.8 [17.1] 73.8 [23.2]

118.9 [48.3] 34.3 [1.3] 33.4 [0.8] 33.6 [0.9] 81.4 [27.4]

142.9 [61.6] 100.9 [38.3] 55.4 [13.0] 54.5 [12.5] 73.8 [23.2]

131.7 [55.4] 32.9 [0.5] 31.8 [-0.1] 31.1 [-0.5] 79.0 [26.1]

149.5 [65.3] 102.2 [39.0] 57.6 [14.2] 60.4 [15.8] 68.4 [20.2]

128.1 [53.4] 32.4 [0.2] 32.0 [0.0] 32.7 [0.4] 68.7 [20.4]

Heat exchanger inlet

68.2 [20.1]

71.4 [21.9]

56.5 [13.6]

123.8 [51.0]

67.9 [19.9]

122.0 [50.0]

OCH811B

4-4. STANDARD CAPACITY DIAGRAM

Before calculating the sum of total capacity of indoor units, please convert the value into the kBtu/h model capacity following the formula on “4-1. Method for obtaining system cooling and heating capacity”.

4-4-1. PUMY-P36NKMU4

PUMY-HP36NKMU2

G(x)

Ratio of capacity

Ratio of power input

1.0
0.8
0.6
0.4
0.2 0.0
0
1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0
0
1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0
0

Total capacity of indoor units (kBtu/h)

50
208, 230 V

Total capacity of indoor units (kBtu/h)

Ratio of current

OCH811B

4-4-2. PUMY-P36NKMU4

PUMY-HP36NKMU2

Ratio of capacity

Ratio of power input

1.0
0.8
0.6
0.4
0.2 0.0
0
1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0
0
1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0
0

G(x)

Total capacity of indoor units (kBtu/h)

50
208, 230 V

Total capacity of indoor units (kBtu/h)

Ratio of current

OCH811B

4-4-3. PUMY-HP42NKMU2 <Cooling>

Ratio of capacity

Ratio of power input

1.2
1.0
0.8
0.6
0.4
0.2 0.0
0
1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0
0
1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0
0

G(x)

Total capacity of indoor units (kBtu/h)

208, 230 V

Total capacity of indoor units (kBtu/h)

Ratio of current

OCH811B

4-4-4. PUMY-HP42NKMU2 <Heating>

Ratio of capacity

Ratio of power input

1.2
1.0 0.8 0.6 0.4 0.2 0.0
0
1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.00.0
1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0
0.0

G(x)

Total capacity of indoor units (kBtu/h)

7.5

15.0

22.5

30.0

37.5

45.0

52.5

60.0

Total capacity of indoor units (kBtu/h)

7.5

15.0

22.5

30.0

37.5

45.0

52.5

60.0

Total capacity of indoor units (kBtu/h)

208, 230 V

Ratio of current

OCH811B

4-4-5. PUMY-P48NKMU4

PUMY-HP48NKMU2

Ratio of capacity

Ratio of power input

1.2 1.0 0.8 0.6 0.4 0.2 0.0
0
1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0
0
1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0
0

G(x)

Total capacity of indoor units (kBtu/h)

208, 230 V

Ratio of current

OCH811B

4-4-6. PUMY-P48NKMU4

PUMY-HP48NKMU2

Ratio of capacity

Ratio of power input

1.2 1.0 0.8 0.6 0.4 0.2 0.0
0
1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 0
1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 0

G(x)

Total capacity of indoor units (kBtu/h)

208, 230 V

Total capacity of indoor units (kBtu/h)

Ratio of current

OCH811B

4-4-7. PUMY-P60NKMU4

Ratio of capacity

Ratio of power input

1.2 1.0 0.8 0.6 0.4 0.2 0.0
0
1.2 1.0 0.8 0.6 0.4 0.2 0.0
0
1.2 1.0 0.8 0.6 0.4 0.2 0.0
0

G(x)

Total capacity of indoor units (kBtu/h)

208, 230 V

Ratio of current

OCH811B

4-4-8. PUMY-P60NKMU4

Ratio of capacity

Ratio of power input

1.2 1.0 0.8 0.6 0.4 0.2 0.0
0
1.2 1.0 0.8 0.6 0.4 0.2 0.0
0
1.2 1.0 0.8 0.6 0.4 0.2 0.0
0

G(x)

Total capacity of indoor units (kBtu/h)

208, 230 V

Ratio of current

OCH811B

4-5. CORRECTING CAPACITY FOR CHANGES IN THE LENGTH OF REFRIGERANT PIPING
(1) During cooling, obtain the ratio (and the equivalent piping length) of the outdoor units rated capacity and the total in-use indoor capacity, and find the capacity ratio corresponding to the standard piping length from Figure 13 to 17. Then multiply by the cooling capacity from Figure 7 and 8 in “4-2. CORRECTION BY TEMPERATURE” to obtain the actual capacity.
(2) During heating, find the equivalent piping length, and find the capacity ratio corresponding to standard piping length from Figure 18. Then multiply by the heating capacity from Figure 9 and 10 in “4-2. CORRECTION BY TEMPERATURE” to obtain the actual capacity.

(1) Capacity Correction Curve Figure 13 PUMY-P36NKMU4
1.00 0.95

PUMY-HP36NKMU2

Total capacity of indoor unit 18 [kBtu/h]

0.90

0.85

27 [kBtu/h]

Capacity ratio

0.80 36 [kBtu/h] 0.75

0.70

0.65

0.60

46.8 [kBtu/h]

0.55

0.50 0

50 100 150 200 250 300 350 400 450 500 550 600 Piping equivalent length (ft)

Figure 14 PUMY-HP42NKMU2

Total capacity of indoor unit 1.00

0.95 21 [kBtu/h] 0.90

0.85 31.5 [kBtu/h] 0.80

Capacity ratio

0.75

0.70

42 [kBtu/h]

0.65

54.6 [kBtu/h]

0.60

0.55

0.50 0

50 100 150 200 250 300 350 400 450 500 550 600 Piping equivalent length (ft)

OCH811B

Figure 15 PUMY-P48NKMU4

PUMY-HP48NKMU2

Capacity ratio

1.00 0.95 0.90 0.85 0.80 0.75 0.70 0.65 0.60 0.55 0.50
0

Total capacity of indoor unit 24 [kBtu/h] 36 [kBtu/h] 48 [kBtu/h] 62.4 [kBtu/h] 50 100 150 200 250 300 350 400 450 500 550 600 Piping equivalent length (ft)

Figure 16 PUMY-P60NKMU4
1.00

Total capacity of indoor unit

Capacity ratio

0.95 30 [kBtu/h] 45 [kBtu/h] 0.90
60 [kBtu/h] 0.85

0.80 78 [kBtu/h] 0.75

0.70 0

20 40 60 80 100 120 140 160 180 200 220 240 260 Piping equivalent length (ft)

OCH811B

Figure 17 PUMY-P36NKMU4
PUMY-P48NKMU4
1.00

PUMY-HP36NKMU2 PUMY-HP42NKMU2 PUMY-HP48NKMU2

0.95

0.90

Capacity ratio

0.85

0.80

0.75

0.70 0

50 100 150 200 250 300 350 400 450 500 550 600 Piping equivalent length (ft)

Figure 18 PUMY-P60NKMU4
1.00

0.95

Capacity ratio

0.90

0.85

0.80

0.75

0.70 0

20 40 60 80 100 120 140 160 180 200 220 240 260 Piping equivalent length (ft)

(2) Method for Obtaining the Equivalent Piping Length Equivalent length = (length of piping to farthest indoor unit) + (0.99 × number of bends in the piping) (ft)

4-5-1. Correction of Heating Capacity for Frost and Defrosting If heating capacity has been reduced due to frost formation or defrosting, multiply the capacity by the appropriate correction factor from the following table to obtain the actual heating capacity.

Correction factor diagram

Outdoor Intake temperature <W.B.°F (°C)> 43(6) 37(4) 36(2) 32(0) 28(-2) 25(-4) 21(-6) 18(-8) 14(-10) 5(-15) -4(-20) -13(-25)

Correction factor

1.00 0.98 0.89 0.88 0.89 0.90 0.95 0.95 0.95 0.95 0.95 0.95

OCH811B

4-6. NOISE CRITERION CURVES

PUMY-P36NKMU4 PUMY-HP36NKMU2

MODE SPL(dB) COOLING 49 HEATING 53

LINE

OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)

70 NC-70

60 NC-60

50 NC-50

40 NC-40

30 NC-30

APPROXIMATE
20 THRESHOLD OF
HEARING FOR CONTINUOUS NOISE

NC-20

10 63 125 250 500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

PUMY-P48NKMU4 PUMY-HP48NKMU2
90

MODE SPL(dB) COOLING 51 HEATING 54

LINE

OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)

70 NC-70

60 NC-60

50 NC-50

40 NC-40

30 NC-30

APPROXIMATE
20 THRESHOLD OF
HEARING FOR CONTINUOUS NOISE

NC-20

10 63 125 250 500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

OCH811B

PUMY-HP42NKMU2
90

MODE SPL(dB) COOLING 50 HEATING 54

LINE

OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)

70 NC-70

60 NC-60

50 NC-50

40 NC-40

30 NC-30

APPROXIMATE
20 THRESHOLD OF
HEARING FOR CONTINUOUS NOISE

NC-20

10 63 125 250 500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

PUMY-P60NKMU4
90

MODE SPL(dB) COOLING 58 HEATING 59

LINE

OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)

70 NC-70

60 NC-60

50 NC-50

40 NC-40

30 NC-30

APPROXIMATE
20 THRESHOLD OF
HEARING FOR CONTINUOUS NOISE

NC-20

10 63 125 250 500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

MICROPHONE
1 m [3.3 ft]

UNIT

1.5 m [4.9 ft]

GROUND

5 OUTLINES AND DIMENSIONS

Unit: mm <inch>

*1 *1

OCH811B

6 WIRING DIAGRAM

PUMY-P36NKMU4

PUMY-P48NKMU4

MULTI. B. M1

63H TRS

63LS 63HSTH7 TH6 TH3 TH4 TH2

LEV-A LEV-B

MS 3

t t t t t

is the switch position.

1
M2 MS 3
1

CNF1 7WH
CNF2 7WH

1
2 3 CNDC PK

1 31 4 1 2 2 1 12 63HS TH7/6 TH3 TH4 TH2

CN3D CN3S CN3N WHRDBU

WHRDWHWHBK

1 31 31 3 1 5 1 5

CNLVA CNLVB

WH RD

13 63LS
BU

13 63H
YE

CN2 1 RD 7

1 CN51 5 WH

7 F1

CN4
WH 12

SWU2SWU1

SW5

SW6

SW9 1

SW1 SW8 1 SW2 1

SW4 1 SW3 SW7

LED1 LED2

X505 X504 X503 X502 X501

1 3 SV3 1 321S4 1 3 SV2 1 3 SV1 1 3 SS/BH

GN BU GY

2
LED3 1 2 CNAC
RD

CNS1 CNS2 CN41 CN40 RDYEWH WH
2 1 2 14 14 1

CN102 WH 41

21S4

SV1

M-NET P.B. BK

14 CN2
TB1WH CN1
WH 53 1

TO INDOOR UNIT OR BRANCH BOX 30V DC(Non-polar)

TB3 M1 RD

RD M2

BK S

FOR CENTRALIZED CONTROL 30V DC(Non-polar)

TB7 M1 YE 2
YE M2
S

P. B.

W BK MS V WH 3 U RD
MC

IC600 W
V U

TO BRANCH BOX 208/230V AC 60Hz

TB1B B1 RD

FUSE1

B2 BU FUSE2

GNYE

1 CN2 7 RD

TH8

12 12 CN6 CN4

CNAC2 3RD 1

3CNWAHC1 LI NI

WHWHCNDC

PK1 3

IC500

BK EI

BK E3
BK E4

TB3A

TB2A

TB1A

BK TB3B WH TB2B RD TB1B

DCL1 DCL2

DCL3

*2
POWER SUPPLY 208/230V AC 60Hz

TB1
L1 RD L2 BU
GNYE

*1 MODEL SELECTION
The black square indicates a switch position.

MODEL SW2 SW4 SW8 SW9 MODEL SW2 SW4 SW8 SW9

PUMY-P36NKMU4 OFF OFF

OFF

PUMY-P48NKMU4 OFF OFF

OFF

123456

3456

123456

3456

* * 2 Use copper supply wires.

3 When a Branch box is connected,

Utiliser des fils d’alimentation en cuivre. SW2-5 should be ON.

LEGEND

SYMBOL

NAME

SYMBOL

NAME

SYMBOL

NAME

TB1

Terminal BlockPower Supply

TH8

ThermistorHeat Sink

SW5

SwitchFunction Selection

TB1B

Terminal BlockBranch box

TRS

Thermal Protector

SW6

SwitchFunction Selection

TB3

Terminal BlockIndoor/Outdoor, Branch LEV-A, LEV-B Linear Expansion Valve

SW7

SwitchFunction Selection

box/Outdoor Transmission Line

DCL1, DCL2, DCL3 Reactor

SW8

SwitchModel Selection

TB7

Terminal Block

P.B.

Power Circuit Board

SW9

SwitchFunction/Model Selection

Centralized Control Transmission Line U/V/W Connection Terminal U/V/W-Phase SWU1 SwitchUnit Address Selection, ones digit

FUSE1, FUSE2 FuseT20A L250V

Connection Terminal L1-Phase

SWU2 SwitchUnit Address Selection, tens digit

Motor for Compressor

Connection Terminal L2-Phase

SS/BH Connector Connection for Option

MF1, MF2 Fan Motor

TB1A, TB2A, TB3A Connection Terminal Reactor

CN3D Connector Connection for Option

21S4

Solenoid Valve Coil 4-Way Valve TB1B, TB2B, TB3B

CN3S Connector Connection for Option

63H

High Pressure Switch

IC500 Converter

CN3N Connector Connection for Option

63HS

High Pressure Sensor

IC600 Inverter

CN51 Connector Connection for Option

63LS

Low Pressure Sensor

EI, E3, E4 ConnectionTerminal Electrical Parts Box LED1, LED2 LEDOperation Inspection Display

SV1

Solenoid Valve Coil Bypass Valve MULTI.B. Multi Controller Circuit Board

LED3

LEDPower Supply to Main Microcomputer

TH2

Thermistor HIC Pipe

SW1

SwitchDisplay Selection

F1, F2 FuseT6.3A L250V

TH3

Thermistor Outdoor Liquid Pipe

SW2

SwitchFunction/Model Selection X501X505 Relay

TH4

Thermistor Compressor

SW3

SwitchTest Run

M-NET P.B. M-NET Power Circuit Board

TH6

Thermistor Suction Pipe

SW4

SwitchModel Selection

TB1

ConnectionTerminal Electrical Parts Box

TH7

ThermistorAmbient

OCH811B

PUMY-P60NKMU4

MULTI. B. M1

63H TRS

63LS 63HSTH7 TH6 TH3 TH4 TH2

LEV-A LEV-B

MS 3

t t t t t

is the switch position.

1
M2 MS 3
1

CNF1 7WH
CNF2 7WH

1
2 3 CNDC PK

1 31 4 1 2 2 1 12 63HS TH7/6 TH3 TH4 TH2
WHRDWHWHBK

13 63LS
BU

13 63H
YE

CN3D CN3S CN3N WHRDBU
1 31 31 3 1 5 1 5 CNLVA CNLVB WH RD

SWU2SWU1 SW9 1

SW5

SW6

SW1 SW8 1 SW2 1

CN2 1 RD 7
7

CN4 WH
12

1 CN51 5 WH

SW4 1 SW3 SW7 LED1 LED2

X505 X504 X503 X502 X501

1 3 SV3 1 321S4 1 3 SV2 1 3 SV1 1 3 SS/BH

BK GN BU GY

1 2 CNAC RD

LED3

2
CNS1 CNS2 CN41 CN40 RDYEWH WH
2 1 2 14 14 1

CN102 WH 41

21S4

SV1

4 M-NET P.B.

P. B.

TO INDOOR UNIT OR BRANCH BOX 30V DC(Non-polar)

TB3 M1 RD

RD M2

W BK MS V WH 3 U RD
MC

TH8 7 2
t

21 21 7 CN4 CN6 WHWH W
V U

CN2 1 RD
IC500

IC600

CN2

TB1WH CN1

53 1

TB3B

TB2B

TB1B

TB1A

TB2A

TB3A

TB4 TB3

FOR CENTRALIZED CONTROL 30V DC(Non-polar)

TB7 M1 YE 2
YE M2
S

DCL1 DCL2 DCL3

CNDC PK 1 3
2

TO BRANCH BOX 208/230V AC 60Hz

TB1B B1 RD
B2 BU GNYE

FUSE1 FUSE2

N. F.

E4 E3

BU TB2

RD TB1

CNAC2 3RD 1

3CNWAHC1

*2
POWER SUPPLY 208/230V AC 60Hz

TB1 L1 RD L2 BU
GNYE

*1 MODEL SELECTION
The black square indicates a switch position.

MODEL SW2 SW4 SW8 SW9

PUMY-P60NKMU4 OFF OFF

OFF

123456

3456

*2 Use copper supply wires. Utiliser des fils d’alimentation en cuivre.
*3 When a Branch box is connected, SW2-5 should be ON.

LEGEND

SYMBOL

NAME

SYMBOL

NAME

SYMBOL

NAME

TB1 TB1B

Terminal BlockPower Supply Terminal BlockBranch box

TRS

Thermal Protector

LEV-A, LEV-B Linear Expansion Valve

SW4 SW5

SwitchModel Selection SwitchFunction Selection

TB3

Terminal BlockIndoor/Outdoor, Branch DCL1, DCL2, DCL3 Reactor

SW6

SwitchFunction Selection

box/Outdoor Transmission Line

N.F.

Noise Filter Board

SW7

SwitchFunction Selection

TB7

Terminal Block

Centralized Control Transmission Line NI

Connection Terminal L1-Phase Connection Terminal L2-Phase

SW8 SW9

SwitchModel Selection SwitchFunction/Model Selection

FUSE1, FUSE2 FuseT20A L250V

Motor for Compressor

TB1, TB2 ConnectionTerminal Power Circuit Board SWU1 EI, E3, E4 ConnectionTerminal Electrical Parts Box SWU2

SwitchUnit Address Selection, ones digit SwitchUnit Address Selection, tens digit

MF1, MF2 Fan Motor

P.B.

Power Circuit Board

SS/BH Connector Connection for Option

21S4

Solenoid Valve Coil 4-Way Valve TB3, TB4 ConnectionTerminal Noise Filter Board CN3D Connector Connection for Option

63H

High Pressure Switch

U/V/W Connection Terminal U/V/W-Phase CN3S

Connector Connection for Option

63HS 63LS SV1 TH2

High Pressure Sensor Low Pressure Sensor Solenoid Valve Coil Bypass Valve Thermistor HIC Pipe

TB1A, TB2A, TB3A Connection Terminal Reactor TB1B, TB2B, TB3B
IC500 Converter IC600 Inverter

CN3N Connector Connection for Option

CN51

Connector Connection for Option

LED1, LED2 LEDOperation Inspection Display

LED3

LEDPower Supply to Main Microcomputer

TH3

Thermistor Outdoor Liquid Pipe

MULTI.B. Multi Controller Circuit Board

F1, F2 FuseT6.3A L250V

TH4

Thermistor Compressor

SW1

SwitchDisplay Selection

X501X505 Relay

TH6

Thermistor Suction Pipe

SW2

SwitchFunction/Model Selection M-NET P.B. M-NET Power Circuit Board

TH7

Thermistor Ambient

SW3

SwitchTest Run

TB1

ConnectionTerminal Electrical Parts Box

TH8

Thermistor Heat Sink

OCH811B

PUMY-HP36NKMU2

PUMY-HP42NKMU2

PUMY-HP48NKMU2

MULTI. B. M1

63H TRS 63LS 63HSTH7 TH6 TH3 TH4 TH2
22

LEV-A LEV-B

MS 3

t t t t t

is the switch position.

1
M2 MS 3
1

CNF1 7WH
CNF2 7WH

1
2 3 CNDC PK

1 31 4 1 2 2 1 12 63HS TH7/6 TH3 TH4 TH2
WHRDWHWHBK

13 63LS
BU

13 63H
YE

CN3D CN3S CN3N WHRDBU
1 31 31 3 1 5 1 5 CNLVA CNLVB WH RD

SWU2SWU1 SW9 1

SW5

SW6

SW1 SW8 1 SW2 1

CN2 1 RD 7
7

CN4 WH
12

1 CN51 5 WH

SW4 1 SW3 SW7 LED1 LED2

X505 X504 X503 X502 X501

1 3 SV3 1 3 21S4 1 3 SV2 1 3 SV1 1 3 SS/BH

BK GN BU GY

1 2 CNAC RD

LED3

CNS1 CNS2 CN41 CN40 RDYEWH WH
2 1 2 14 14 1

CN102 WH 41

21S4

SV2

SV1

21 2

4 M-NET P.B.

TO INDOOR UNIT OR BRANCH BOX 30V DC(Non-polar)

TB3 M1 RD

RD M2

S BK

FOR CENTRALIZED CONTROL 30V DC(Non-polar)

TB7 M1 YE 2
YE M2
S

TO BRANCH BOX 208/230V AC 60Hz

TB1B B1 RD
B2 BU

FUSE1 FUSE2

GNYE

*2
POWER SUPPLY 208/230V AC 60Hz

TB1 L1 RD L2 BU
GNYE

THP BH
P. B.
W BK MS V WH 3 U RD MC

TH8 7 2
t

21 21 CN4 CN6 WHWH

7 CN2 RD
W
V U

1 IC500

IC600

TB3B

TB2B

TB1B

TB1A

TB2A

TB3A

TB4 TB3

DCL1 DCL2 DCL3

N. F.

E4 E3

BU TB2

RD TB1

CNDC PK 1 3
2

CNAC2

CNAC1

1 3RD 1 3WH

CN2

TB1WH CN1

53 1

*1 MODEL SELECTION
The black square indicates a switch position.

MODEL SW2 SW4 SW8 SW9 MODEL SW2 SW4 SW8 SW9 MODEL SW2 SW4 SW8 SW9

PUMY-HP36NKMU2 OFF OFF

OFF

PUMY-HP42NKMU2 OFF OFF

OFF

PUMY-HP48NKMU2 OFF OFF

OFF

123456

3456

123456

3456

123456

3456

* * 2 Use copper supply wires.

3 When a Branch box is connected, SW2-5 should be ON.

Utiliser des fils d’alimentation en cuivre.

LEGEND

SYMBOL

NAME

SYMBOL

NAME

SYMBOL

NAME

TB1 TB1B TB3

Terminal BlockPower Supply

TH7

Thermistor Ambient

Terminal BlockBranch box

TH8

Thermistor Heat Sink

Terminal BlockIndoor/Outdoor, Branch TRS

Thermal Protector<Compressor>

box/Outdoor Transmission Line

LEV-A, LEV-B Linear Expansion Valve

SW3 SW4 SW5 SW6

SwitchTest Run SwitchModel Selection SwitchFunction Selection SwitchFunction Selection

TB7

Terminal Block

DCL1, DCL2, DCL3 Reactor

Centralized Control Transmission LineN.F.

Noise Filter Board

FUSE1, FUSE2 FuseT20A L250V

Connection Terminal L1-Phase

Motor for Compressor

Connection Terminal L2-Phase

SW7 SW8 SW9 SWU1

SwitchFunction Selection SwitchModel Selection SwitchFunction/Model Selection SwitchUnit Address Selection, ones digit

MF1, MF2 Fan Motor

TB1, TB2 ConnectionTerminal Power Circuit Board SWU2 SwitchUnit Address Selection, tens digit

21S4 63H

Solenoid Valve Coil 4-Way Valve EI, E3, E4 ConnectionTerminal Electrical Parts Box SS/BH

High Pressure Switch

P.B.

Power Circuit Board

CN3D

Connector Connection for Option Connector Connection for Option

63HS 63LS

High Pressure Sensor Low Pressure Sensor

TB3, TB4 ConnectionTerminal Noise Filter Board CN3S U/V/W Connection Terminal U/V/W-Phase CN3N

Connector Connection for Option Connector Connection for Option

SV1

Solenoid Valve Coil Bypass Valve TB1A, TB2A, TB3A Connection Terminal Reactor

CN51

Connector Connection for Option

SV2

Solenoid Valve Coil Switching Valve TB1B, TB2B, TB3B

LED1, LED2 LEDOperation Inspection Display

Base Heater

IC500 Converter

LED3

LEDPower Supply to Main Microcomputer

THP

Thermal Protector<Base Heater>

IC600 Inverter

F1, F2 FuseT6.3A L250V

TH2

Thermistor HIC Pipe

MULTI.B. Multi Controller Circuit Board

X501X505 Relay

TH3

Thermistor Outdoor Liquid Pipe

SW1

SwitchDisplay Selection

M-NET P.B. M-NET Power Circuit Board

TH4

Thermistor Compressor

SW2

SwitchFunction/Model Selection TB1

ConnectionTerminal Electrical Parts Box

TH6

Thermistor Suction Pipe

OCH811B

23 23
23 23
OCH811B

23 23
23 23
23 23

Applicable outdoor units for this service manual

For centralized management

Outdoor unit 051

Piping

For Branch box/CITY MULTI indoor unit M-NET cable

78 78 78 78 78 78

901

45 6

Address SW

901

45 6

M-NET cable shielding wire must be connected to each refrigerant system (outdoor and branch box).
Set addresses:
Outdoor unit ………… 051100 Branch box …………… 001046 CITY MULTI ………….. 001050
Outdoor unit has no 100s digit switch. The address automatically become “100” if it is set as “0150”.
Make sure that the wiring between the branch box and indoor unit is properly done, matching with the piping connection.

A
Signal line
A Control Indoor unit
A (001)

M-NET remote controller cannot be connected with refrigerant system including branch box.

Refrigerant systems including branch box cannot be grouped with using M-NET remote controller or system controller.

B
A Control Indoor unit
B (002)

Other CITY MULTI outdoor unit

MA remote controller

For centralized management

Outdoor unit 061

For Branch box/CITY MULTI indoor unit

Branch box 001 C
A Control Indoor unit
C (003)
MA remote controller

SW1 ON
123456

45 6

Address SW

901

45 6

A Control
Indoor unit D
(004)

Piping
A Control Indoor unit
E (005)

A Control
Indoor unit A
(006)

WL-RC

MA remote controller

SW1 ON
123456

Branch box 006

A Control
Indoor unit B
(007)

A Control
Indoor unit C
(008)

WL-RC

78 78

45 6

23 23

Address SW

901

CITY MULTI Indoor unit
011

Address SW

901

CITY MULTI Indoor unit
012

Address SW

901

78 78

45 6

M-NET
remote 111 controller

Address SW

1 901

78 78

901

23 23

M-NET remote 161 controller

Address SW

1 901

45 6

901

45 6

Note: The refrigerant system which includes branch box cannot be operated as a group.

23 23

78 78

45 6

CITY MULTI Indoor unit
013

Address SW

901

45 6

CITY MULTI Indoor unit
014

Address SW

901

45 6

78 78 78 78

45 6

7 NECESSARY CONDITIONS FOR SYSTEM CONSTRUCTION
7-1. TRANSMISSION SYSTEM SETUP
23 23

CITY MULTI Indoor unit
015

Address SW

901

7-2. Special Function Operation and Settings for M-NET Remote Controller
For the detailed procedure of “group settings” and “paired settings”, refer to the remote controller’s manuals.

7-3. REFRIGERANT SYSTEM DIAGRAM

PUMY-P36NKMU4 PUMY-P48NKMU4

Service port

Refrigerant Gas pipe

Strainer

Ball valve

Check valve <Low pressure>

Thermistor (TH6) <Suction pipe>

Low pressure sensor(63LS)

4-way valve

Check valve <High pressure>

Solenoid valve (SV1)
Strainer
Strainer
Fusible plug

Oil separator Capillary tube

High pressure sensor (63HS)

High pressure switch (63H)

Thermistor (TH4) <Compressor>

Refrigerant flow in cooling Refrigerant flow in heating
Thermistor (TH7) <Ambient>
Distributor Thermistor (TH3) <Outdoor liquid pipe>

Refrigerant Liquid pipe

Thermistor (TH2) <Hic pipe> Stop valve
Strainer

Service port

Strainer

Restrictor valve
HIC L EV -B

Accumulator Strainer

Compressor

Thermal protector

L EV -A

Strainer

Capillary tube for oil separator [inch(mm)]: ø0.098 × ø0.031 × L39.37 (ø2.5 × ø0.8 × L1000)

OCH811B

PUMY-HP36NKMU2 PUMY-HP42NKMU2 PUMY-HP48NKMU2

Service port

Refrigerant Gas pipe

Strainer

Ball valve

Check valve <Low pressure>

Thermistor (TH6) <Suction pipe>

Low pressure sensor(63LS)

Solenoid valve (SV2)

Restrictor valve

Refrigerant Liquid pipe

Thermistor (TH2) <Hic pipe> Stop valve
Strainer

Service port

Strainer

HIC L EV -B

4-way valve

Check valve <High pressure>

Refrigerant flow in cooling Refrigerant flow in heating
Thermistor (TH7) <Ambient>

Solenoid valve (SV1)
Strainer

Oil separator High pressure sensor (63HS)
Capillary tube

Strainer Fusible plug

High pressure switch (63H)
Thermistor (TH4) <Compressor>

Thermal protector

Distributor Thermistor (TH3) <Outdoor liquid pipe>

Accumulator

Compressor

Strainer

L EV -A

Strainer

Capillary tube for oil separator [inch(mm)]: ø0.098 × ø0.031× L39.37 (ø2.5 × ø0.8 × L1000)

PUMY-P60NKMU4

Service port Refrigerant Gas pipe

Strainer

Ball valve

Check valve <Low pressure>

Thermistor (TH6) <Suction pipe>

Low pressure sensor(63LS)

Strainer

Refrigerant Liquid pipe

Thermistor (TH2) <Hic pipe> Stop valve
Strainer

Service port

Strainer

HIC L EV -B

4-way valve

Check valve <High pressure>

Refrigerant flow in cooling Refrigerant flow in heating
Thermistor (TH7) <Ambient>

Solenoid valve (SV1)
Strainer
Capillary tube Strainer

Oil separator High pressure sensor (63HS)
Capillary tube
High pressure switch (63H) Thermistor (TH4) <Compressor>

Accumulator

Compressor

Fusible plug

Thermal protector

Distributor Thermistor (TH3) <Outdoor liquid pipe>

Strainer

L EV -A

Strainer

Capillary tube for oil separator [inch(mm)]: ø0.098 × ø0.031 × L31.50 (ø2.5 × ø0.8 × L800) Capillary tube for solenoid valve [inch(mm)]: ø0.157 × ø0.117 × L19.685 (ø4.0 × ø3.0 × L500)

OCH811B

PUMY-P36NKMU4

PUMY-P48NKMU4

Thermistor(TH-A to E) <Gas pipe temperature>
Room temperature thermistor (TH1 or RT11)
Condenser/ evaporator temperature thermistor
Pipe temperature thermistor (TH2 or RT13)

LEV-A to E (Linear expansion)

Service port Strainer

4-Way Valve (21S4)

Ball valve

Solenoid valve(SV1) <Bypass>
Check valve <Low pressure>
Thermistor(TH6) <Suction pipe>

Low pressure sensor(63LS)
Restrictor valve

Thermistor(TH2) <HIC pipe>

Stop valve

Strainer

HIC

Check valve <High pressure>

Thermistor(TH7) <Ambient>

Strainer Strainer

Oil separator High pressure

Capillary

switch(63H)

tube1

Fusible plug

High pressure sensor(63HS)
Thermistor(TH4) <Compressor>

Thermal protector

Accumulator

Compressor

Thermistor(TH8) <Heat Sink>

Distributor
Thermistor(TH3) <Outdoor Liquid pipe>

Service port

Strainer

LEV-B

Strainer

LEV-A

Strainer

Strainer Capillary
tube2

Indoor

Branch box

Outdoor unit

Refrigerant flow in cooling Refrigerant flow in heating

Unit: inch (mm)

Capillary tube 1

Capillary tube 2 behind LEV

(For return of oil from oil separator)

(in cooling mode)

Outdoor unit Branch box

ø0.098 × ø0.031 × L(39-1/2) (ø2.5 × ø0.8 × L1000)

(ø0.157 × ø0.117 × L(5-1/8)) × 5 ((ø4.0 × ø3.0 × L130) × 5)
(ø0.157 × ø0.117 × L(5-1/8)) × 3 ((ø4.0 × ø3.0 × L130) × 3)

PUMY-HP36NKMU2

PUMY-HP42NKMU2

PUMY-HP48NKMU2

Thermistor(TH-A to E) <Gas pipe temperature>
Room temperature thermistor (TH1 or RT11)
Condenser/ evaporator temperature thermistor
Pipe temperature thermistor (TH2 or RT13)

LEV-A to E (Linear expansion)

Service port Strainer

4-Way Valve (21S4)

Ball valve

Solenoid valve(SV1) <Bypass>
Check valve <Low pressure>
Thermistor(TH6) <Suction pipe>

Low pressure sensor(63LS)
Solenoid valve(SV2) <Switching>

Thermistor(TH2) <HIC pipe>

Stop valve

Strainer

Restrictor valve HIC

Check valve <High pressure>

Thermistor(TH7) <Ambient>

Strainer Strainer

Oil separator High pressure

Capillary

sensor(63HS)

tube1

High pressure switch(63H)

Distributor
Thermistor(TH3) <Outdoor Liquid pipe>

Fusible plug

Thermistor(TH4) <Compressor>

Thermal protector

Accumulator

Compressor

Thermistor(TH8) <Heat Sink>

Service port

Strainer

LEV-B

Strainer

LEV-A

Strainer

Strainer Capillary
tube2

Indoor

Branch box

Refrigerant flow in cooling Refrigerant flow in heating

Outdoor unit

Unit: inch (mm)

Capillary tube 1

Capillary tube 2 behind LEV

(For return of oil from oil separator)

(in cooling mode)

Outdoor unit

ø0.098 × ø0.031 × L(39-1/2) (ø2.5 × ø0.8 × L1000)

Branch box

(ø0.157 × ø0.117 × L(5-1/8)) × 5 ((ø4.0 × ø3.0 × L130) × 5)
(ø0.157 × ø0.117 × L(5-1/8)) × 3 ((ø4.0 × ø3.0 × L130) × 3)

OCH811B

PUMY-P60NKMU4

Thermistor(TH-A to E) <Gas pipe temperature>
Room temperature thermistor (TH1 or RT11)
Condenser / evaporator temperature thermistor
Pipe temperature thermistor (TH2 or RT13)

LEV-A to E (Linear expansion)

Service port Strainer

4-Way Valve (21S4)

Check valve <High pressure>

Thermistor(TH7) <Ambient>

Ball valve

Solenoid valve(SV1) <Bypass>

Check valve <Low pressure>
Thermistor(TH6) <Suction pipe>

Low pressure sensor(63LS)

Capillary tube2

Oil separator

Strainer Strainer Strainer

Capillary tube1

Fusible

High pressure switch(63H)
High pressure sensor(63HS)

plug Thermistor(TH4) <Compressor>

Thermistor(TH2) <HIC pipe>

Stop valve

Strainer

HIC

Accumulator

Compressor

Thermal protector
Thermistor(TH8) <Heat Sink>

Distributor
Thermistor(TH3) <Outdoor Liquid pipe>

Service port

Strainer

LEV-B

Strainer

LEV-A

Strainer

Strainer Capillary
tube3

Indoor

Branch box

Outdoor unit

Refrigerant flow in cooling Refrigerant flow in heating

Capillary tube 1 (For return of oil from oil separator)

Outdoor unit

ø0.098 × ø0.031 × L(39-1/2) (ø2.5 × ø0.8 × L800)

Branch box

Capillary tube 2 (For solenoid valve (SV1))
ø0.157 × ø0.117 × L(19-5/8) (ø4.0 × ø3.0 × L500)

Unit: inch (mm)
Capillary tube 3 behind LEV (in cooling mode)
(ø0.157 × ø0.117 × L(5-1/8)) × 5 ((ø4.0 × ø3.0 × L130) × 5)
(ø0.157 × ø0.117 × L(5-1/8)) × 3 ((ø4.0 × ø3.0 × L130) × 3)

OCH811B

7-4. SYSTEM CONTROL
7-4-1. Example for the System
· Example for wiring control cables, wiring method and address setting, permissible lengths, and the constraint items are listed in the standard system with detailed explanation.

A. Example of an M-NET remote controller system (address setting is necessary.)

r1 r2

Example of wiring control cables

1. Standard operation
L1 OC
(51)

L2 M-IC
(01)

M-IC
(02)

TB3 TB7
M1 M2 S M1 M2 S

TB5 TB15
M1 M2 S 1 2

Wiring Method and Address Setting
a. Use feed wiring to connect terminals M1 and M2 on transmission cable block (TB3) for the outdoor unit (OC) to terminals M1 and M2 on the transmission cable block (TB5) of each CITY MULTI series indoor unit (M-IC). Use non-polarized 2-core wire.
b. Connect terminals M1 and M2 on transmission cable terminal block (TB5) for each indoor unit with the terminal block (TB6) for M-NET the remote controller (M-NET RC).
c. Set the address setting switch (on outdoor unit P.C.B) as shown below.

(101)
M-NET RC

(102)
M-NET RC

· 1 M-NET remote controller for each CITY MULTI series indoor unit · There is no need for setting the 100 position on the M-NET remote
controller.

Unit

Range

CITY MULTI series indoor unit (M-IC)

001 to 050

Setting Method —

Outdoor unit (OC)

051 to 100

Use the smallest address of all the indoor unit plus 50.

M-NET Remote controller (M-NET RC)

101 to 150

Indoor unit address plus 100

2. Operation using 2 M-NET remote controllers
OC M-IC
(51) (01)

TB3 TB7
M1 M2 S M1 M2 S

TB5 TB15
M1 M2 S 1 2

M-IC
(02)
TB5 TB15
M1 M2 S 1 2

(101) (151)

(102) (152)

M-NET RC M-NET RC M-NET RC M-NET RC

(Main)

(Sub)

(Main)

(Sub)

· Using 2 M-NET remote controllers for each CITY MULTI series indoor unit.

a. Same as above 1.a b. Same as above 1.b c. Set address switch (on outdoor unit P.C.B) as
shown below.

Unit

Range

Setting Method

CITY MULTI series indoor unit (M-IC)

001 to 050

—

Outdoor unit (OC)

051 to 100

Use the smallest address of all the indoor units plus 50.

Main M-NET Remote Controller 101 to 150 Indoor unit address plus 100
(M-NET RC)

Sub M-NET Remote Controller 151 to 200 Indoor unit address plus 150
(M-NET RC)

3. Group operation

OC
(51)
TB3 TB7
M1 M2 S M1 M2 S

Group A
M-IC(Main)
(01)
TB5 TB15
M1 M2 S 1 2

M-IC(Sub)
(02)
TB5 TB15
M1 M2 S 1 2

AB
(101)
M-NET RC
· Multiple CITY MULTI series indoor units operated together by 1 M-NET remote controller

a. Same as above 1.a b. Connect terminals M1 and M2 on transmission cable termi-
nal block (TB5) of the M-IC main unit with the most recent address within the same CITY MULTI series indoor unit (M-IC) group to terminal block (TB6) on the M-NET remote controller. c. Set the address setting switch (on outdoor unit P.C.B) as shown below.

Unit

Range

Setting Method

M-IC (Main) M-IC (Sub)

Use the smallest address within 001 to 050 the same group of CITY MULTI
series indoor units.
Use an address, other than that of the M-IC (Main) from among the units 001 to 050 within the same group of indoor units. This must be in sequence with the M-IC (Main).

Outdoor unit

051 to 100

Use the smallest address of all the CITY MULTI series indoor units plus 50.

Main M-NET

Remote Controller (M-NET RC)

101 to 150

Set at an M-IC (Main) address within the same group plus 100.

d. Use the CITY MULTI series indoor unit (M-IC) within the group with the most functions as the M-IC (Main) unit.

Combinations of 1 through 3 above are possible.

OCH811B

· Name, Symbol and the Maximum Remote controller Units for Connection

Name
Outdoor unit
CITY MULTI series indoor unit
M-NET remote controller

Symbol OC M-IC
M-NET RC

Maximum units for connection —
Refer to “3. SPECIFICATIONS”.
Maximum 2 M-NET RC for 1 indoor unit, Maximum 12 M-NET RC for 1 OC

Permissible Lengths
Indoor/outdoor transmission line Maximum length AWG 16 [1.25 mm²] L1 + L2 656 ft [200 m] M-NET Remote controller cable length 1. If AWG 20 to AWG 16 [0.5 to 1.25 mm²] 1, 2 33ft [10 m] 2. If the length exceeds 33ft [10
m], the exceeding section should be AWG 16 [1.25 mm²] and that section should be a value within the total extension length of the transmission cable and maximum transmission cable length. (L3)

Constraint items
· M-NET remote controller (M-NET RC) and MA remote controller (MA RC) cannot be used together.
· Do not connect anything with TB15 of CITY MULTI series indoor unit (M-IC).

(51)

M-IC

(01)

(02)

TB3 TB7
M1 M2 S M1 M2 S

TB5 TB15
M1 M2 S 1 2

AB
(101)
M-NET RC

AB
NO TB15 MA-RC

Same as above Same as above

OC
(51)
TB3 TB7
M1 M2 S M1 M2 S

M-IC
(01)
TB5 TB15
M1 M2 S 1 2

M-IC
(02)
TB5 TB15
M1 M2 S 1 2

(101) (151)

M-NET RC M-NET RC

(Main)

(Sub)

NO NO A B

(102) (103) (104)

M-NET RC 1M-NET RC 2M-NET RC

(Main)

(Sub)

OC
(51)
TB3 TB7
M1 M2 S M1 M2 S

M-IC(Main)
(01)
TB5 TB15
M1 M2 S 1 2

M-IC(Sub)
(02)
TB5 TB15
M1 M2 S 1 2

NOA B (102)
M-NET RC

1 Use the CITY MULTI series indoor unit (M-IC) address plus 150 as the sub M-NET remote controller address. In this case, it should be 152.
2 3 or more M-NET remote controllers (M-NET RC) cannot be connected to 1 CITY MULTI series indoor unit.
1 The M-NET remote controller address is the CITY MULTI series indoor unit main address plus 100. In this case, it should be 101.

OCH811B

B. Example of a group operation system with 2 or more outdoor units and an M-NET remote controller. (Address settings are necessary.)

Examples of Transmission Cable Wiring
L6 r1 r2 r3

OC (51)

TB3

TB7

M1 M2 S M1 M2 S

L2
D

(53)

TB7 TB3

M1 M2 S M1 M2 S

L1
A

M-IC (01)
TB5 M1 M2 S

M-IC (02)
TB5 M1 M2 S

M-IC (05)
TB5 M1 M2 S

M-IC (06)
TB5 M1 M2 S

AB
(101) M-NET RC
L3
M-IC (03)
TB5 M1 M2 S

(105) (155)

M-NET RC M-NET RC

M-IC (04)
TB5 M1 M2 S

M-IC (07)
TB5 M1 M2 S

Power Supply Unit
M1 M2 S
System controller
M1 M2 S
A: Group B: Group C: Group D: Shielded Wire E: Sub M-NET Remote Controller ( ): Address example

AB
(104) M-NET RC
B

a. Always use shielded wire when making connections between the outdoor unit (OC) and the CITY MULTI series indoor unit (M-IC), as well for all OC-OC, and IC-IC wiring intervals.
b. Use feed wiring to connect terminals M1 and M2 and the ground terminal on the transmission cable terminal block (TB3) of each outdoor unit (OC) to terminals M1 and M2 on the terminal S on the transmission cable terminal block of the CITY MULTI series indoor unit (M-IC).
c. Connect terminals M1 and M2 on the transmission cable terminal block of the CITY MULTI series indoor unit (M-IC) that has the most recent address within the same group to the terminal block on the M-NET remote controller (M-NET RC).
d. Connect together terminals M1, M2 and terminal S on the terminal block for centralized control (TB7) for the outdoor unit (OC).
e. DO NOT change the jumper connector CN41 on outdoor multi controller circuit board. f. The earth processing of S terminal for the centralized control terminal block (TB7) is unnecessary. Connect the termi-
nal S on the power supply unit with the earth. g. Set the address setting switch as follows.

Unit

Range

Setting Method

M-IC (Main) M-IC (Sub) Outdoor Unit

01 to 50 01 to 50 51 to 100

Use the smallest address within the same group of CITY MULTI series indoor units. Use an address, other than the M-IC (Main) in the same group of CITY MULTI series indoor units. This must be in sequence with the M-IC (Main). Use the smallest address of all the CITY MULTI series indoor units plus 50. The address automatically becomes “100” if it is set as “0150”.

Main M-NET Remote Controller 101 to 150 Set at an M-IC (Main) address within the same group plus 100.

Sub M-NET Remote Controller 151 to 200 Set at an M-IC (Main) address within the same group plus 150.

MA Remote Controller

—

Address setting is not necessary. (Main/sub setting is necessary.)

h. The group setting operations among the multiple CITY MULTI series indoor units are done by the M-NET remote controller (M-NET RC) after the electrical power has been turned on.

OCH811B

Wiring Method Address Settings

· Name, Symbol, and the Maximum Units for Connection

Permissible Length

· Maximum line length via outdoor unit: L1+L2+L3+L4, L3+L4+L5+L6, L1+L2+L5+L6 1640 ft [500 m] (AWG16 [1.25 mm² ]) · Indoor/outdoor transmission line Maximum length: L1, L3+L4, L2+L5, L6 656 ft [200 m] (AWG16 [1.25 mm²]) · M-NET Remote controller cable length: 1, 2+ 3 33 ft [10 m] (AWG20 to AWG16 [0.5 to 1.25 mm²])
If the length exceeds 33 ft [10 m], use an AWG16 [1.25 mm²] shielded wire. The section of the cable that exceeds 33 ft [10 m] must be included in the max length via outdoor units and max transmission cable length.

OC (51)

TB3

TB7

M1 M2 S M1 M2 S

M-IC (01)
TB5 M1 M2 S

M-IC (02)
TB5 M1 M2 S

M-IC (05)
TB5 M1 M2 S

M-IC (06)
TB5 M1 M2 S

Prohibited items

D
OC (53)
NO
TB3 TB7 M1 M2 S M1 M2 S

AB
(101) M-NET RC

M-IC (03)
TB5 M1 M2 S

M-IC (04)
TB5 M1 M2 S

(105) (155)

M-NET RC M-NET RC

E NO

M-IC (07)
TB5 M1 M2 S

Power Supply Unit
M1 M2 S
System controller
M1 M2 S
A : Group B : Group C : Group D : Shielded Wire E : Sub M-NET Remote Controller ( ): Address example

AB
(104) M-NET RC
B

· Never connect together the terminal blocks (TB5) for transmission wires for CITY MULTI series indoor unit (M-IC) that have been connected to different outdoor units (OC).
· Set all addresses to ensure that they are not overlapped. · M-NET remote controller and MA remote controller cannot be connected with the CITY MULTI series indoor unit of the
same group wiring together.

OCH811B

C. Example of an MA remote controller system (address setting is not necessary.) NOTE: In the case of same group operation, need to set the address that is only main CITY MULTI series indoor unit.

Example of wiring control cables 1. Standard operation

L1 OC
(00)

L2
M-IC
(00)

M-IC
(00)

TB3 TB7
M1 M2 S M1 M2 S

TB5 TB15
M1 M2 S 1 2

Wiring Method and Address Setting
a. Use feed wiring to connect terminals M1 and M2 on transmission cable block (TB3) for the outdoor unit (OC) to terminals M1 and M2 on the transmission cable block (TB5) of each CITY MULTI series indoor unit (M-IC). Use non-polarized 2-core wire.
b. Connect terminals 1 and 2 on transmission cable terminal block (TB15) for each CITY MULTI series indoor unit with the terminal block for the MA remote controller (MA-RC).

r3
6 r1
r5 r2

· 1 MA remote controller for each indoor unit

AB MA-RC

2. Operation using 2 remote controllers
OC

(00)

M-IC

(00)

TB3 TB7
M1 M2 S M1 M2 S

TB5 TB15
M1 M2 S 1 2

M-IC
(00)
TB5 TB15
M1 M2 S 1 2

· Using 2 MA remote controllers for each CITY MULTI series indoor unit
3. Group operation
OC
(00)

MA-RC (Main)

MA-RC (Sub)

M-IC
(00)

TB3 TB7
M1 M2 S M1 M2 S

TB5 TB15
M1 M2 S 1 2

AB MA-RC
M-IC
(00)
TB5 TB15
M1 M2 S 1 2

· Multiple indoor units operated

together by 1 MA remote con-

MA-RC

troller

Combinations of 1 through 3 above are possible.

a. The same as above a b. The same as above b c. In the case of using 2 remote controllers, connect
terminals 1 and 2 on transmission cable terminal block (TB15) for each indoor unit with the terminal block for 2 MA remote controllers. · Set either one of the controllers to “sub remote
controller”. Refer to the installation manual of MA remote controller.
a. The same as above a b. The same as above b c. In the case of group operation using MA remote
controller (MA-RC), connect terminals 1 and 2 on transmission cable terminal block (TB15) of each CITY MULTI series indoor unit. Use non-polarized 2-core wire. d. In the case of same group operation, need to set the address that is only main CITY MULTI series indoor unit. Please set the smallest address within number 0150 of the CITY MULTI series indoor unit with the most functions in the same group.

OCH811B

Permissible Lengths

Prohibited items

Indoor/outdoor transmission line The MA remote controller and the M-NET remote controller cannot be used together with

Maximum length:

the CITY MULTI series indoor unit of the same group.

L1 + L2 656 ft [200 m] (AWG 16 M-NET remote controller cannot be connected without address setting.

[1.25 mm²])

MA remote controller cable length:

(00)

1, 2 656 ft [200 m] (AWG 22

to AWG 16 [0.3 to 1.25 mm²])

M-IC

(00)

TB3 TB7
M1 M2 S M1 M2 S

TB5 TB15
M1 M2 S 1 2

NOA B (00)
M-NET RC

AB MA-RC

Indoor/outdoor transmission line Maximum length: L1 + L2 656 ft [200 m] (AWG 16 [1.25 mm²]) MA remote controller cable length:
3 + 4, 5 656 ft [200 m] (AWG 22 to AWG 16 [0.3 to 1.25 mm²])

3 MA remote controllers or more cannot be connected with the CITY MULTI series indoor unit of the same group.

OC
(00)
TB3 TB7
M1 M2 S M1 M2 S

M-IC
(00)
TB5 TB15
M1 M2 S 1 2

MA-RC (Main)

MA-RC (Sub)

MA-RC (Main)

MA-RC (Sub)

Indoor/outdoor transmission line Maximum length: L1 + L2 656 ft [200 m] (AWG 16 [1.25 mm²])

The second MA remote controller is connected with the terminal block (TB15) for the MA remote controller of the same CITY MULTI series indoor unit (M-IC) as the first MA remote control.

MA remote controller cable length:

6 + 7 656 ft [200 m] (AWG 22 to

AWG 16 [0.3 to 1.25 mm²])

(00)

M-IC

(00)

TB3 TB7
M1 M2 S M1 M2 S

TB5 TB15
M1 M2 S 1 2

OCH811B

MA-RC
50

MA-RC

D. Example of a group operation with 2 or more outdoor units and an MA remote controller. (Address settings are necessary.)
L1

OC (51)
TB3 TB7 M1 M2 S M1 M2 S

M-IC
(01)
TB5 TB15 M1 M2 S 1 2

M-IC

(02)

TB5 TB15 M1 M2 S 1 2

M-IC (05)

M-IC

(06)

TB5 TB15 M1 M2 S 1 2

Examples of Transmission Cable Wiring
L6 m3
m 1 m1
m1 m4
m3

AB
MA-RC

MA-RC MA-RC

(53)

TB3

TB7

M1 M2 S M1 M2 S

M-IC
(03)
TB5 TB15 M1 M2 S 1 2

M-IC (04)
TB5 TB15 M1 M2 S 1 2

M-IC (07)
TB5 TB15 M1 M2 S 1 2

Power Supply Unit
M1 M2 S

System controller
M1 M2 S

AB
MA-RC

: Group
: Group
: Group
: Shielded Wire
: Sub MA Remote Controller
( ): Address example
a. Always use shielded wire when making connections between the outdoor unit (OC) and the CITY MULTI series indoor unit (M-IC), as well for all OC-OC, and IC-IC wiring intervals.
b. Use feed wiring to connect terminals M1 and M2 and the ground terminal on the transmission cable terminal block (TB3) of each outdoor unit (OC) to terminals M1 and M2 on the terminal S on the transmission cable terminal block of the CITY MULTI series indoor unit (M-IC).
c. Connect terminals 1 and 2 on the terminal block for MA remote controller line (TB15) on the indoor unit (IC) to the terminal block on the MA remote controller (MA). (Nonpolarized two-wire).
d. Connect together terminals M1, M2 and terminal S on the terminal block for centralized control (TB7) for the outdoor unit (OC). e. DO NOT change the jumper connector CN41 on outdoor multi controller circuit board. f. The earth processing of S terminal for the centralized control terminal block (TB7) is unnecessary. Connect the termi-
nal S on the power supply unit with the earth. g. Set the address setting switch as follows.

Unit M-IC (Main)
M-IC (Sub)
Outdoor Unit Main M-NET Remote Controller Sub M-NET Remote Controller
MA Remote Controller

Range 01 to 50
01 to 50
51 to 100 101 to 150 151 to 200
—

Setting Method Use the smallest address within the same group of indoor units. Use an address, other than the M-IC (Main) in the same group of CITY MULTI series indoor units. This must be in sequence with the M-IC (Main). Use the smallest address of all the indoor units plus 50. The address automatically becomes “100” if it is set as “0150”. Set at an M-IC (Main) address within the same group plus 100. Set at an M-IC (Main) address within the same group plus 150. Address setting is not necessary. (Main/sub setting is necessary.)

h. The group setting operations among the multiple CITY MULTI series indoor unit is done by the M-NET remote controller (M-NET RC) after the electrical power has been turned on.

Wiring Method Address Settings

OCH811B

Permissible Length

· Name, Symbol, and the Maximum Units for Connection
Maximum line length via outdoor unit (M-NET cable): L1+L2+L3+L4 and L1+L2+L6+L7 1640 ft [500 m] (AWG 16 [1.25 mm²] or more) Indoor/outdoor transmission line Maximum length (M-NET cable): L1 and L3+L4 and L2+L6 and L7 656 ft [200 m] (AWG 16 [1.25 mm²] or more) MA Remote controller cable length: m1 and m1+m2+m3 and m1+m2+m3+m4 656 ft [200 m] (AWG 22 to AWG 16 [0.3 to 1.25 mm²])

Prohibited items

OC (51)

TB3

TB7

M1 M2 S M1 M2 S

M-IC (01)
TB5 TB15 M1 M2 S 1 2

M-IC (02)
TB5 TB15 M1 M2 S 1 2

M-IC (05)
TB5 TB15 M1 M2 S 1 2

M-IC (06)
TB5 TB15 M1 M2 S 1 2

D
AB
MA-RC

OC (53)
NO
TB3 TB7 M1 M2 S M1 M2 S
Power Supply Unit
M1 M2 S
System controller
M1 M2 S
A : Group B : Group C : Group D : Shielded Wire E : Sub MA Remote Controller ( ): Address example

M-IC (03)
TB5 TB15 M1 M2 S 1 2

M-IC (04)
TB5 TB15 M1 M2 S 1 2
AB
MA-RC
B

MA-RC MA-RC
E
NO
M-IC (07)
TB5 TB15 M1 M2 S 1 2

· Never connect together the terminal blocks (TB5) for transmission wires for CITY MULTI series indoor unit (M-IC) that have been connected to different outdoor units (OC).
· M-NET remote controller and MA remote controller cannot be connected with the CITY MULTI series indoor unit of the same group wiring together.

OCH811B

E. Example of a system using Branch Box and A-Control indoor unit

Examples of Transmission Cable Wiring

OC (51)

TB3

TB7

M1 M2 S M1 M2 S

L3 A

OC (53)

TB7

TB3

M1 M2 S M1 M2 S

Power Supply

Unit

M1 M2 S

System

controller

M1 M2 S

A: Shielded wire ( ): Address example

Branch Box

TB3A S1 S2 S3

TB5 M1 M2 S
(01)

TB3B S1 S2 S3
TB3C S1 S2 S3
TB3D S1 S2 S3
TB3E S1 S2 S3

TB TB5/TB15
S1 A-IC 1 S2 (01) 2
S3

A B

MA-RC

TB TB5/TB15
S1 A-IC 1 S2 (02) 2
S3

A MA-RC
B

TB TB5/TB15
S1 A-IC 1 S2 (03) 2
S3

A
B MA-RC

TB
S1 A-IC S2 (04)
S3

WL-RC

TB
S1 A-IC S2 (05)
S3

WL-RC

Branch Box

TB3A S1 S2 S3

TB5 M1 M2 S
(06)

TB3B S1 S2 S3
TB3C S1 S2 S3

TB3D S1 S2 S3

TB3E S1 S2 S3

TB TB5/TB15
S1 A-IC 1 S2 (06) 2
S3

A MA-RC
B

TB TB5/TB15
S1 A-IC 1 S2 (07) 2
S3

A B

MA-RC

TB
S1 A-IC S2 (08)
S3

WL-RC

Wiring Method Address Settings

a. Always use shielded wire when making connections between the outdoor unit (OC) and the Branch Box, as well for all OC-OC wiring intervals.
b. Use feed wiring to connect terminals M1 and M2 and the ground terminal on the transmission cable terminal block (TB3) of each outdoor unit (OC) to terminals M1 and M2 on the terminal S on the transmission cable terminal block (TB5) of the Branch Box.
c. Connect terminals 1 and 2 on the transmission cable terminal block (TB5/TB15) of the A-control indoor unit (A-IC), to the terminal block on the MA remote controller (MA-RC).
d. Connect together terminals M1, M2 and terminal S on the terminal block for centralized control (TB7) for the outdoor unit (OC).
e. DO NOT change the jumper connector CN41 on outdoor multi controller circuit board. f. The earth processing of S terminal for the centralized control terminal block (TB7) is unnecessary. Connect the termi-
nal S on the power supply unit to the earth. g. Set the address setting switch as follows.

Unit A-IC
Branch Box Outdoor Unit MA Remote Controller

Range 01 to 50
01 to 50 51 to 100
–

Setting Method According to the set address of connected Branch Box, set the A-IC addresses sequentially by SW1 on Branch Box. (For example, when setting the Branch Box address to 01, A-IC addresses set 02,03,04, and 05. ) Use a number within the range 150, but it should not make the highest address of connected A-IC exceed 50. Use the smallest address of all the Branch Box plus 50. The address automatically becomes “100” if it is set as “0150”.
Address setting is not necessary.

OCH811B

Permissible Length

· Name, Symbol, and the Maximum Units for Connection
Maximum line length via outdoor unit (M-NET cable): L1+L2+L3+L4+L5 1640 ft [500 m] (AWG16 [1.25mm2] or more) Branch box/outdoor transmission line Maximum length (M-NET cable): L1+L2, L3+L4, L5 656 ft [200 m] (AWG16 [1.25 mm2] or more) Indoor/branch box transmission line Maximum length (A-Control cable): L6 82 ft [25 m] (AWG14 [1.5] mm2) Remote controller cable length: m1 656 ft [200 m] (AWG22 to AWG16 [0.3 to 1.25 mm2])

Constraint items

OC (51)

TB3

TB7

M1 M2 S M1 M2 S

L3 A

OC (53)

TB7

TB3

M1 M2 S M1 M2 S

Power Supply

Unit

M1 M2 S

System

controller

M1 M2 S

L1
L2
A
NO
AB
M-NET RC (101)

Branch Box

TB3A S1 S2 S3

TB5 M1 M2 S
(01)

TB3B S1 S2 S3
TB3C S1 S2 S3
TB3D S1 S2 S3
TB3E S1 S2 S3

Branch Box

TB3A S1 S2 S3

TB5
M1 (06)
M2
S

TB3B S1 S2 S3
TB3C S1 S2 S3

TB TB5/TB15
S1 A-IC 1 S2 (01) 2
S3

A
B MA-RC

TB TB5/TB15
S1 A-IC 1 S2 (02) 2
S3

A MA-RC
B

TB TB5/TB15
S1 A-IC 1 S2 (03) 2
S3

A B

MA-RC

TB
S1 A-IC S2 (04)
S3

WL-RC

TB
S1 A-IC S2 (05)
S3

WL-RC

TB TB5/TB15
S1 A-IC 1 S2 (06) 2
S3

A B

MA-RC

NO TB TB5/TB15
S1 A-IC 1 S2 (07) 2
S3

TB
S1 A-IC S2 (08)
S3

WL-RC

A: Shielded wire ( ): Address example
· Plural indoor units cannot be operated by an MA single remote controller. · Different refrigerant systems cannot be connected together. · M-NET Remote controller cannot be connected to this system.

OCH811B

8 TROUBLESHOOTING
8-1. CHECKPOINTS FOR TEST RUN
8-1-1. Procedures before test run (1) Before a test run, make sure that the following work is completed.
· Installation related: Make sure that the panel of cassette type and electrical wiring are done. Otherwise electrical functions like auto vane will not operate normally.
· Piping related: Perform leakage test of refrigerant and drain piping. Make sure that all joints are perfectly insulated. Check stop valves on both liquid and gas side for full open.
· Electrical wiring related: Check ground wire, transmission cable, remote controller cable, and power supply cable for secure connection. Make sure that all switch settings of address or adjustments for special specification systems are correctly settled.
(2) Safety check: With the insulation tester of 500 V, inspect the insulation resistance. Do not touch the transmission cable and remote controller cable with the tester. The resistance should be over 1.0 M. Do not proceed inspection if the resistance is less than 1.0 M. Inspect between the outdoor unit power supply terminal block and ground first, metallic parts like refrigerant pipes or the electrical box next, then inspect all electrical wiring of outdoor unit, indoor unit, and all linked equipment.
(3) Before operation: a) Turn the power supply switch of the outdoor unit to on for compressor protection. For a test run, wait at least 12 hours from this point. b) Register control systems into remote controller(s). Never touch the ON/OFF switch of the remote controller(s). Refer to “7-2. Special Function Operation and Settings for M-NET Remote Controller” as for settings. In MA remote controller(s), this registration is unnecessary.
(4) More than 12 hours later from power supply to the outdoor unit, turn all power switch to on for the test run. Perform test run according to the “Operation procedure” table of the bottom of this page. While test running, make test run reports.
8-1-1-1. Test run for M-NET Remote controller Refer to “12-4. TEST RUN” for operation procedure.

OCH811B

8-1-2. Countermeasures For Error During Test Run

If a problem occurs during test run, a code number will appear on the remote controller (or LED on the outdoor unit), and the air conditioning system will automatically cease operating. Determine the nature of the abnormality and apply corrective measures.

Check Check code code (2 digits) (4 digits)

Trouble

0403 Serial communication error or Model selection SW error

U2 UE U7
U2
P6 EF L6 PA P5 P4 UF Pb
UP
U9
U5 U6 U8
U3
U4
U4 U4 U4 U4 U4 F5 F3 UH P4 A0 A2 A3 A6 A7 A8 E0/E4 E3/E5 E3/E5 E0/E4 EF EF EF EF EF

1102 1302 1500
1501
1503 1508 2135 2500 2502 2503 3121 4100 4114
4210
4220
4230 4250 4400
5101
5102
5103 5105 5106 5109 5110 5201 5202 5300 5701 6600 6602 6603 6606 6607 6608 6831 6832 6833 6834 7100 7101 7102 7105 7130

Compressor temperature trouble High pressure trouble or thermal protector trouble Superheat due to low discharge temperature trouble Refrigerant shortage trouble Closed valve in cooling mode Freeze protection of Branch box or Indoor unit 4-way valve trouble in heating mode Circulation water freeze protection Water leakage Drain overflow protection Drain sensor abnormality Out-of-range outside air temperature Compressor current interruption (Locked compressor) Fan trouble (Indoor) Compressor overcurrent interruption/failure in 12 VDC power supply circuit on power circuit board Voltage shortage/overvoltage/PAM error/L1open phase/power synchronization signal error Heat sink temperature trouble Power module trouble or overcurrent trouble Fan trouble (Outdoor) Air inlet thermistor (TH21) open/short Compressor temperature thermistor (TH4) open/short Liquid pipe temperature thermistor (TH22) open/short Suction pipe temperature thermistor (TH6) open/short Gas pipe temperature thermistor (TH23) open/short Outdoor liquid pipe temperature thermistor (TH3) open/short Ambient temperature thermistor (TH7) open/short HIC pipe temperature thermistor (TH2) open/short Heat sink temperature thermistor (TH8) open/short High pressure sensor (63HS) trouble Low pressure sensor (63LS) trouble Primary current error Contact failure of drain float switch Duplex address error Transmission processor hardware error Transmission bus BUSY error Signal communication error with transmission processor No ACK error No response frame error MA communication receive error MA communication send error MA communication send error MA communication receive error Total capacity error Capacity code error Connecting excessive number of units and branch boxes Address setting error
Incompatible unit combination error

Indoor

Detected Unit

Outdoor

Remote Controller

Remarks
Outdoor unit Multi controller boardPower board communication trouble Check delay code 1202 Check delay code 1402 Check delay code 1600 Check delay code 1601 Check delay code 1501

Check delay code 1608

Check delay code 4350
Check delay code 4320
Check delay code 4330 Check delay code 4350 Check delay code 4500
Check delay code 1202
Check delay code 1211
Check delay code 1205 Check delay code 1221 Check delay code 1222 Check delay code 1214 Check delay code 1402 Check delay code 1400 Check delay code 4310
Only M-NET Remote controller is detected. Only M-NET Remote controller is detected. Only M-NET Remote controller is detected. Only M-NET Remote controller is detected. Only M-NET Remote controller is detected. Only M-NET Remote controller is detected. Only MA Remote controller is detected. Only MA Remote controller is detected. Only MA Remote controller is detected. Only MA Remote controller is detected.

NOTES:

1. When the outdoor unit detects No ACK error/No response error, an object indoor unit is treated as a stop, and not assumed to be abnormal. 2. The check codes displayed on the units may be different between the error source and others. In that case, please refer to the check code
of error source by displayed attribute and address. 3. Refer to the service manual of indoor unit or remote controller for the detail of error detected in indoor unit or remote controller.

Self-diagnosis function The indoor and outdoor units can be diagnosed automatically using the self-diagnosis switch
(SW1) and LED indication (LED1, LED2) found on the outdoor multi controller circuit board.
LED indication : Set all contacts of SW1 to OFF. During normal operation
The LED indicates the drive state of outdoor unit.

[Example] When the compressor and SV1 are on during cooling operation.
1 23 45 67 8

Bit

Indication

Compressor operated

52C

21S4

SV1

(SV2)

—

— Always lit

OCH811B

8-1-3. SELF-DIAGNOSIS ACTION BY FLOWCHART

Check code
0403 (Ed)

Serial communication error or Model selection SW error

Abnormal points and detection methods

Causes and checkpoints

If serial communication between the outdoor multi controller circuit board and outdoor power circuit board is defective.

Wire breakage or contact failure of connector CN2 or CN4
Malfunction of communication circuit to power circuit board on outdoor multi controller circuit board
Malfunction of communication circuit on outdoor power circuit board

Diagnosis of defects Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.

Diagnosis

Remedy

Check the connection of the communication line (CN2 and CN4) between the outdoor controller board and power board.

Are they connected normally?

Yes

Check the wiring.

Are they connected normally?

Yes

Connect the CN2 and CN4 properly. Replace them in the case of breakage.
Connect the wiring properly. Replace them in the case of breakage.
The communication circuit of either the outdoor controller board or power board is defective. If unable to identify the defective circuit;
Replace the outdoor controller board if it does not recover, Replace the outdoor power board.

OCH811B

Check code
1102 (U2)

Compressor temperature trouble

Chart 1 of 2

Abnormal points and detection methods

Causes and checkpoints

(1) If the TH4 temperature becomes conditions as follows:
exceeds 230°F [110 ] continuously for 5 minutes exceeds 257°F[125 ] (2) If a pressure detected by the high pressure sensor and converted to saturation temperature exceeds 104°F [40 ] during defrosting, and TH4 exceeds 230°F [110 ].
TH4: Thermistor <Compressor> LEV: Linear expansion valve

Malfunction of stop valve Over-heated compressor operation caused by shortage of refrigerant Defective thermistor Defective outdoor controller board LEV performance failure Defective indoor controller board Clogged refrigerant system caused by foreign object Refrigerant shortage while in heating operation (Refrigerant liquid accumulation in compressor while indoor unit is OFF/thermo-OFF.)

Diagnosis of defects Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.

Diagnosis

Remedy

Is 5101 displayed when restarted?

Yes (5101)

No (1102)

Is the outdoor stop valve (liquid/gas) fully open?

Yes

Refer to the diagnosis of check code 5101. Open the stop valve (liquid/gas) fully.

Is there refrigerant leak?

Yes

No (no leak)

Check the connection for thermistor wiring and indoor controller board connector.

Repair the refrigerant leakage.

Is there any abnormality on

connectors/wires such as a disconnection,

Yes

half-disconnection or breakage?

Continue to the next page.

OCH811B

Connect the connector properly (Repair or replace it in the case of breakage).

Check code
1102 (U2)

Compressor temperature trouble

Diagnosis of defects Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.

Diagnosis

Remedy

Continued from the previous page.

Chart 2 of 2

Disconnect the thermistor wiring to check the resistance.

Is the resistance detected?

Yes
Check the voltage and appearance of the outdoor controller board.

Is the voltage normal value?

Is it free from any trace of over-

heating or burning?

Yes

Disconnect the indoor LEV wiring and check the resistance.

Replace the thermistor. Replace the outdoor controller board.

Is the resistance detected?

Yes

Replace the indoor LEV. Replace the indoor controller board.

OCH811B

Check code
1302 (UE)

High pressure trouble or thermal protector trouble
Chart 1 of 4

Abnormal points and detection methods

Causes and checkpoints

(1) High pressure abnormality (63H operation) If 63H operates(*) during compressor operation. (*602 PSIG [4.15 MPaG])
(2) High pressure abnormality (63HS detected) 1. If a pressure detected by 63HS is 625 PSIG [4.31 MPaG]or more during compressor operation. 2. If a pressure detected by 63HS is 600 PSIG [4.14 MpaG] or more for 3 minutes during compressor operation.
(3) Compressor temperature abnormality (TRS operation) If TRS operates(*) during compressor operation. (*266°F[130°C])
63H : High pressure switch 63HS : High pressure sensor LEV : Linear expansion valve SV1 : Solenoid valve TH4 : Thermistor <Compressor> TH7 : Thermistor <Ambient> TRS : Thermal protector

Defective operation of stop valve (not fully open) Clogged or broken pipe Malfunction or locked outdoor fan motor Short-cycle of outdoor unit Dirt of outdoor heat exchanger Remote controller transmitting error caused by noise interference Contact failure of the outdoor controller board connector Defective outdoor controller board Short-cycle of indoor unit Decreased airflow, clogged filter, or dirt on indoor unit. Malfunction or locked indoor fan motor Decreased airflow caused by defective inspection of outdoor temperature thermistor (It detects lower temperature than actual temperature.) Indoor LEV performance failure Malfunction of fan driving circuit SV1 performance failure Defective high pressure sensor Defective high pressure sensor input circuit on outdoor controller board Defective Thermistor<Compressor> Over-heated compressor operation caused by shortage of refrigerant

Diagnosis of defects Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.

Diagnosis

Remedy

Turn the power OFF of indoor/outdoor

unit, Fresh Master, Lossnay and remote

controller simultaneously for 10 minutes, then turn the power back ON.

Yes

Is the check code <6607> No ACK error

displayed?

There is abnormality in circuit board or wiring connection on the outdoor unit.

Is 5201 displayed when restarted?
No (1302)
Is the outdoor stop valve (liquid/ gas) fully open?
Yes

Yes (5201)
No

Does the outdoor fan rotate while the operation?

Yes

Does the indoor fan rotate while the operation?

Yes

Refer to the diagnosis of check code 5201.
Open the stop valve (liquid/gas) fully.
Check the outdoor fan motor. Refer to “How to check the parts” on the outdoor unit service manual.
Check the indoor fan motor. Refer to “How to check the parts” on the indoor unit service manual.

Is the indoor unit short-cycled? No (no short-cycle)

Yes (short-cycled)

Continue to the next page.

OCH811B

Solve the short-cycle.

Check code

1302

High pressure trouble or thermal protector trouble

(UE)

Diagnosis of defects Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.

Chart 2 of 4

Diagnosis

Remedy

Continued from the previous page.

Is the indoor unit filter clogged?

Yes (Clogged filter)

No (No clog)

Is there dirt on the indoor heat exchanger?
No (no dirt)

Yes (dirty)

Is the outdoor unit short-cycled?

Yes (short-cycled)

No (no short-cycle)

Is there dirt on the outdoor heat exchanger?
No (no dirt)

Yes (dirty)

Are the pipes clogged or broken?

Yes

Disconnect the TH7 wiring and check the resistance.

Clean the filter. Wash the indoor heat exchanger.
Solve the short cycle. Wash the outdoor heat exchanger.
Correct defective pipes.

Continue to the next page.

OCH811B

Check code

1302

High pressure trouble or thermal protector trouble

(UE)

Diagnosis of defects Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.

Chart 3 of 4

Diagnosis

Remedy

Continued from the previous page.

Is the resistance detected?

Yes

Disconnect the indoor LEV wiring to check the resistance.

Replace the TH7.

Is the resistance detected?

Yes

Check the voltage(*) and appearance of the indoor controller board.
*For the voltage, refer to “8-8.HOW TO CHECK COMPONENTS”.

Is the voltage normal?

Is it free from any trace of over-

heating or burning?

Yes

Check the resistance of SV1.

Replace the indoor LEV. Replace the indoor controller board.

Continue to the next page.

OCH811B

Check code

1302

High pressure trouble or thermal protector trouble

(UE)

Diagnosis of defects Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.

Chart 4 of 4

Diagnosis

Remedy

Continued from the previous page.

Is the resistance detected?

Replace the SV1.

Yes

Is the connector for outdoor

controller board 63H disconnected or

Yes

loose?

Reconnect the connector or connect it tightly.

Check the 63HS voltage.

Is the voltage(*) detected?

Yes

Disconnect the TH4 wiring and check the resistance

Is the resistance detected?

Yes

Is there refrigerant leak?

Yes

*For the voltage, refer to “8-8.HOW TO CHECK COMPONENTS”.

Replace the 63HS.
Replace the TH4. Repair the refrigerant leakage. Replace the outdoor controller board.

OCH811B

Check code
1500 (U7)

Superheat due to low discharge temperature trouble
Chart 1 of 2

Abnormal points and detection methods

Causes and checkpoints

If the discharge superheat is continuously detected -27°F [-15 ](*) or less for 5 minutes even though the indoor LEV has minimum open pulse after the compressor starts operating for 10 minutes.
LEV : Linear expansion valve TH4 : Thermistor <Compressor> 63HS : High pressure sensor

Disconnection or loose connection of TH4 Defective holder of TH4 Disconnection of LEV coil Disconnection of LEV connector LEV performance failure

*At this temperature, conditions for the abnormality detection will not be satisfied if no abnormality is detected on either TH4 or 63HS.

Diagnosis of defects Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.

Diagnosis

Remedy

Is the TH4 wiring disconnected?

Yes

(disconnected)

No (connected properly)

Connect the wiring properly.

Check the resistance of TH4.

32°F [0°C]·······700k 50°F [10°C]·····410k 68°F [20°C]·····250k 86°F [30°C]·····160k 104°F [40°C]·····104k

Is the resistance normal?

Yes

Check the connector .c.ontact and wiring of the indoor LEV.

Is there any abnormality

such as half-disconnection or

Yes

breakage?

Disconnect the indoor LEV wiring to check the resistance.

Continue to the next page.

Replace the TH4.
Connect the connector properly, or replace the LEV.

OCH811B

Check code

1500 Superheat due to low discharge temperature trouble
(U7)

Diagnosis of defects Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.

Chart 2 of 2

Diagnosis

Remedy

Continued from the previous page.

Is the resistance detected?

Yes

Check the voltage and appearance of the indoor controller board.

Replace the indoor LEV.

Is the voltage normal?

Is it free from any trace of over-

heating or burning?

Yes

Check the 63HS voltage.

Replace the indoor controller board.

Is the voltage(*) detected?

Replace the 63HS.

Yes
*For the voltage, refer to “8-8.HOW TO CHECK COMPONENTS”.

Replace the outdoor controller board.

OCH811B

Check code
1501 (U2)

Refrigerant shortage trouble

Chart 1 of 2

Abnormal points and detection methods

Causes and checkpoints

(1) When all of the following conditions have been satisfied for 15 consecutive minutes:
1. The compressor is operating in HEAT mode. 2. Discharge super heat is 176°F [80 ] or more. 3. Difference between TH7 and the TH3 applies to the formula of
(TH7-TH3 < 9°F [5 ]). 4.The saturation temperature converted from a high pressure sensor
detects below 95°F [35 ].

Defective operation of stop valve (not fully open) Defective thermistor Defective outdoor controller board Indoor LEV performance failure Gas leakage or shortage Defective 63HS

(2) When all of the following conditions have been satisfied: 1.The compressor is in operation.
2.When cooling, discharge superheat is 144°F [80 ] or more, and the saturation temperature converted from a high pressure sensor is over
-40°F [-40 ]. When heating, discharge superheat is 162°F [90 ] or more.

TH3 : Thermistor <Outdoor liquid pipe> TH7 : Thermistor <Ambient> LEV : Linear expansion valve 63HS : High pressure sensor

Diagnosis of defects Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.

Diagnosis

Remedy

Is the outdoor stop valve (ball valve) fully open?

Yes

Open the stop valve (ball valve) fully.

Is there refrigerant leak? No (no leaking)

Yes (leaking)

Is 5104 displayed when restarted?
No (1501)
Check relevant thermistor wirings and connector contacts of the controller boards.

Yes (5104)

Repair the refrigerant leak. Refer to the diagnosis of check code 5104.

Is there any abnormality on

connectors such as disconnection,

Yes

half-disconnection or breakage?

Disconnect the thermistor wiring and check the resistance.

Continue to the next page.

OCH811B

Connect the connector properly (Repair or replace it in the case of breakage).

Check code
1501 (U2)

Refrigerant shortage trouble

Diagnosis of defects Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.

Diagnosis

Remedy

Continued from the previous page.

Chart 2 of 2

Is the resistance detected?

Yes

Check the 63HS voltage.

Replace the thermistor.

Is the voltage detected?

Yes

Check the voltage and appearance of the outdoor controller board.

Yes

Is the voltage normal value?

Is it free from any trace of over-

heating or burning?

Yes

Disconnect the indoor LEV wiring and check the resistance.

Replace the 63HS. Replace the outdoor controller board.

Is the resistance detected?

Yes

OCH811B

Replace the indoor LEV. Replace the indoor controller board.

Check code
1501 (U2)

Closed valve in cooling mode

Abnormal points and detection methods

Causes and checkpoints

If stop valve is closed during cooling operation.
When both of the following temperature conditions have been satisfied for 20 minutes or more during cooling operation.
1. TH22j – TH21j -3.6°F [-2°C] 2. TH23j – TH21j -3.6°F [-2°C] Note: For indoor unit, the abnormality is detected if an operating unit satisfies the condition.

Outdoor liquid/gas valve is closed. Mulfunction of outdoor LEV (LEV-A) (blockage)
TH21: Indoor intake temperature thermistor TH22: Indoor liquid pipe temperature thermistor TH23: Indoor gas pipe temperature thermistor LEV: Linear expansion valve

Diagnosis of defects Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.

Diagnosis

Remedy

Is the outdoor stop valve No
(liquid/gas) fully open? Yes
Disconnect the outdoor LEV wiring to check the resistance.

Open the outdoor stop valve (liquid/gas) fully.

Is the resistance detected?

Yes v

Replace the outdoor LEV. Replace the outdoor controller board.

OCH811B

Check code
1503 (P6)

Freeze protection of Branch box or Indoor unit

Abnormal points and detection methods

Causes and checkpoints

The purpose of the check code is to prevent indoor unit from freezing or dew condensation which is caused when a refrigerant keeps flowing into the unit in STOP.
When all of the following conditions are satisfied: 1. The compressor is operating in COOL mode. 2. 15 minutes have passed after the startup of the compressor, or the change in the number of operating indoor units is made (including a change by turning thermo-ON/OFF). 3. After the condition 2 above is satisfied, the thermistor of indoor unit in STOP detects TH22j 23°F [-5°C] for 5 consecutive minutes.

1 Wrong piping connection between indoor unit and branch box
2 Miswiring between indoor unit and branch box 3 Miswiring of LEV in branch box
Malfunction of LEV in branch box
LEV: Linear expansion valve TH22: Indoor liquid pipe temperature thermistor

Diagnosis of defects Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.

Diagnosis

Remedy

Check the port which the piping and

wiring between the indoor unit and

branch box is connected.

Is the piping and wiring connected to the

same port?

Connect the piping and wiring to the same port.

Yes

Check the port which the LEV wiring of

branch box is connected. Is the wiring connected to the same port as

the corresponding branch box?

Yes

Connect the LEV wiring to the intended port properly.

Check the LEV wiring of indoor unit that is not via branch box is connected properly.

Yes

Disconnect the LEV wiring of branch box or indoor unit to check the resistance.

Connect the LEV wiring properly.

Is the resistance detected? Yes
OCH811B

No
69

Replace the LEV coil.
Replace the LEV assy in branch box or the LEV of indoor unit that is not via branch box.

Check code
1508 (EF)

4-way valve trouble in heating mode

Abnormal points and detection methods

Causes and checkpoints

If 4-way valve does not operate during heating operation.
When any of the following temperature conditions is satisfied for 3 minutes or more during heating operation when the outdoor temperature is -4°F [-20°C] or more:
1. TH22j – TH21j -18°F [-10°C] 2. TH23j – TH21j -18°F [-10°C] 3. TH22j 37.4°F [3°C] 4. TH23j 37.4°F [3°C] Note: For indoor unit, the abnormality is detected if an operating unit satisfies the condition.

4-way valve failure Disconnection or failure of 4-way valve coil Clogged drain pipe Disconnection or loose connection of connectors Malfunction of input circuit on outdoor multi controller circuit board Defective outdoor power circuit board
TH21: Indoor intake temperature thermistor (RT11 or TH1) TH22: Indoor liquid pipe temperature thermistor (RT13 or TH2) TH23: Indoor gas pipe temperature thermistor (TH-A to E)

Diagnosis of defects Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.

Diagnosis

Remedy

Is the connector for outdoor multi

controller circuit board or 4-way

Yes

valve coil disconnected or loose?

Disconnect the connector for outdoor multi controller circuit board or 4-way valve coil to check the resistance.

Reconnect the connector or connect it tightly.

Is the resistance detected?

Please refer to “8-7. HOW TO Yes CHECK PARTS” for ohm values.

Check the voltage and appearance of the outdoor multi controller circuit board.

Is the detected voltage normal?

Is it free from any trace of over-

heating or burning?

Yes

Replace the 4-way valve coil.
Replace the outdoor multi controller circuit board.
Replace the 4-way valve.

OCH811B

Check code
3121

Out-of-range outside air temperature

Abnormal points and det

Documents / Resources

PUMY P36NKMU4 Split Type Heat Pump Air Conditioners [pdf] Instruction Manual
P36NKMU4, P48NKMU4, P60NKMU4, HP36NKMU2, HP42NKMU2, HP48NKMU2, P36NKMU4 Split Type Heat Pump Air Conditioners, P36NKMU4, Split Type Heat Pump Air Conditioners, Heat Pump Air Conditioners, Pump Air Conditioners, Conditioners

References

User Manual

PUMY P36NKMU4 Split Type Heat Pump Air Conditioners Instruction Manual

P36NKMU4 Split Type Heat Pump Air Conditioners

Product Information

Specifications:

Product Usage Instructions

Safety Precautions:

Preparation before Repair Service:

Cautions Related to New Refrigerant (R410A):

Refrigerant Charging:

General Cautions:

FAQ

Q: Can I use refrigerant other than R410A in the air
conditioner?

Q: What precautions should I take during the repair
service?

Documents / Resources

References

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