Mitsubishi Electronics PUY-A36NHA2, PUY-A42NHA2-BS, PUY-A36NHA2-BS, PUZ-A18NHA2-BS, PUY-A18NHA2 User Manual

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
SPLIT -TYPE, AIR CONDITIONERS

Outdoor unit

November 2007

No.OCH429

SERVICE MANUAL

[model names]

PUZ-A18NHA2
PUZ-A24NHA2
PUZ-A30NHA2
PUZ-A36NHA2

PUZ-A42NHA2
PUZ-A18NHA2-BS

PUZ-A24NHA2-BS
PUZ-A30NHA2-BS
PUZ-A36NHA2-BS
PUZ-A42NHA2-BS

PUY-A12NHA2
PUY-A18NHA2
PUY-A24NHA2

PUY-A30NHA2
PUY-A36NHA2
PUY-A42NHA2
PUY-A12NHA2-BS
PUY-A18NHA2-BS
PUY-A24NHA2-BS
PUY-A30NHA2-BS
PUY-A36NHA2-BS
PUY-A42NHA2-BS

[Service Ref.]

PUZ-A18NHA2
PUZ-A24NHA2
PUZ-A30NHA2
PUZ-A36NHA2
PUZ-A42NHA2
PUZ-A18NHA2-BS
PUZ-A24NHA2-BS
PUZ-A30NHA2-BS
PUZ-A36NHA2-BS
PUZ-A42NHA2-BS

PUY-A12NHA2
PUY-A18NHA2
PUY-A24NHA2
PUY-A30NHA2
PUY-A36NHA2
PUY-A42NHA2
PUY-A12NHA2-BS
PUY-A18NHA2-BS
PUY-A24NHA2-BS
PUY-A30NHA2-BS
PUY-A36NHA2-BS
PUY-A42NHA2-BS

R410A

NOTE:

• This manual describes only
service data of the outdoor
units.

• RoHS compliant products
have <G> mark on the spec
name plate.

• For servicing RoHS compliant

products, refer to the RoHS
PARTS LIST.

PUZ-A24/30/36NHA2
PUY-A24/30/36NHA2

CONTENTS

1. REFERENCE MANUAL··································2

2. SAFETY PRECAUTION··································3

3. FEATURES ·····················································6

4. SPECIFICATIONS···········································7

5. DATA·······························································9

6. OUTLINES AND DIMENSIONS····················13

7. WIRING DIAGRAM·······································16

8. WIRING SPECIFICATIONS··························20

9.

REFRIGERANT SYSTEM DIAGRAM

10. TROUBLESHOOTING ··································28

11. EASY MAINTENANCE FUNCTION ··············85

12. FUNCTION SETTING····································88

13.

MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER

14. DISASSEMBLY PROCEDURE ···················106

·············25

············96

PARTS CATALOG (OCB429)

1-1. INDOOR UNIT

Model name Service Ref.

Service
Manual No.

PLA-A12/18/24/30/36/42BA PLA-A12/18/24/30/36/42BA1

OCH420
OCB420

PCA-A24/30/36/42GA PCA-A24/30/36/42GA2 OC368
PKA-A12/18GA PKA-A12/18GA2

OC369

PKA-A12/18GAL PKA-A12/18GAL2
PKA-A24/30/36FA PKA-A24/30/36FA2

PKA-A24/30/36FAL PKA-A24/30/36FAL2

1-2. TECHNICAL DATA BOOK
Manual No. OCS13

1

REFERENCE MANUAL

2

2 SAFETY PRECAUTION

Use new refrigerant pipes.

Make sure that the inside and outside of refrige­rant piping is clean and it has no contamination
such as sulfur hazardous for use, oxides, dirt,
shaving particles, etc.
In addition, use pipes with specified thickness.

Store the piping to be used during installation
indoors and keep both ends of the piping sealed
until just before brazing. (Leave elbow joints, etc.
in their packaging.)

Use ester oil, ether oil or alkylbenzene oil (small
amount) as the refrigerant oil applied to flares
and flange connections.

In case of using the existing pipes for R22, be careful with
the followings.

· Be sure to clean the pipes and make sure that the insides
of the pipes are clean.

· Change flare nut to the one provided with this product.
Use a newly flared pipe.

· Avoid using thin pipes.

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 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.

Keep the 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.

Flare tool

Electronic refrigerant
charging scale

Vacuum pump adaptor

Size adjustment gauge

Gauge manifold

Torque wrench

Gas leak detector

Charge hose

Tools for R410A

Contamination inside refrigerant piping can cause deterio­ration of refrigerant oil etc.

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

If large amount of mineral oil enters, that can cause deterio­ration of refrigerant oil etc.

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

2-1. ALWAYS OBSERVE FOR SAFETY

Before obtaining access to terminals, all supply
circuits must be disconnected.

2-2. CAUTIONS RELATED TO NEW REFRIGERANT

Cautions for units utilizing refrigerant R410A

3

Gravimeter

Unit

[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) When performing service, install a filter drier simultaneously.

Be sure to use a filter drier for new refrigerant.

[2] Additional refrigerant charge

When charging directly from cylinder

· Check that cylinder for R410A on the market is syphon type.

· Charging should be performed with the cylinder of syphon stood vertically. (Refrigerant is charged from liquid phase.)

[3] Service tools

Use the below service tools as exclusive tools for R410A refrigerant.

No. Tool name Specifications

1 Gauge manifold ·Only for R410A

·Use the existing fitting

·Use high-tension side pressure of 5.3MPa·G or over.

2 Charge hose ·Only for R410A

·Use pressure performance of 5.09MPa·G or over.

3 Electronic scale
4 Gas leak detector ·Use the detector for R134a, R407C or R410A.
5 Adaptor for reverse flow check ·Attach on vacuum pump.
6 Refrigerant charge base
7 Refrigerant cylinder ·Only for R410A ·Top of cylinder (Pink)

·Cylinder with syphon

8 Refrigerant recovery equipment

specifications

.

4

2-3. CAUTIONS FOR REFRIGERANT PIPING WORK

1/4
3/8
1/2
5/8
3/4

6.35

9.52

12.70

15.88

19.05

0.8 [1/32]

0.8 [1/32]

0.8 [1/32]

1.0 [5/128]

—

0.8 [1/32]

0.8 [1/32]

0.8 [1/32]

1.0 [5/128]

1.0 [5/128]

Nominal

dimensions[inch]

Diagram below: Piping diameter and thickness

Outside

diameter

(mm)

Thickness

: mm [inch]

R410A R22

1/4
3/8
1/2
5/8
3/4

6.35

9.52

12.70

15.88

19.05

9.1 [11/32-23/64]

13.2 [1/2-33/64]

16.6 [41/64-21/32]

19.7 [49/64-25/32]
—

9.0

13.0

16.2

19.4

23.3

Nominal

dimensions[inch]

Flare cutting dimensions

Outside

diameter

Dimension A

( )

+0

-0.4

Unit : mm [inch]

R410A R22
1/4
3/8
1/2
5/8
3/4

6.35

9.52

12.70

15.88

19.05

17.0 [43/64]

22.0 [7/8]

26.0 [1-3/64]

29.0 [1-9/64]
—

17.0

22.0

24.0

27.0

36.0

Nominal

dimensions[inch]

Flare nut dimensions

Outside

diameter

Dimension B

Unit : mm [inch]

R410A R22

Gauge manifold
Charge hose
Gas leak detector

Refrigerant recovery equipment
Refrigerant cylinder
Applied oil

Safety charger

Charge valve
Vacuum pump

Flare tool

Bender
Pipe cutter
Welder and nitrogen gas cylinder
Refrigerant charging scale
Vacuum gauge or thermis­tor vacuum gauge and
vacuum valve
Charging cylinder

Air purge, refrigerant charge
and operation check
Gas leak check

Collection of refrigerant
Refrigerant charge

Apply to flared section
Prevent compressor malfunction

when charging refrigerant by
spraying liquid refrigerant

Prevent gas from blowing out
when detaching charge hose

Vacuum drying and air
purge

Flaring work of piping

Bend the pipes
Cut the pipes
Weld the pipes
Refrigerant charge
Check the degree of vacuum. (Vacuum
valve prevents back flow of oil and refri­gerant to thermistor vacuum gauge)
Refrigerant charge

Tool exclusive for R410A
Tool exclusive for R410A
Tool for HFC refrigerant
Tool exclusive for R410A
Tool exclusive for R410A
Ester oil, ether oil and
alkylbenzene oil(minimum amount)
Tool exclusive for R410A

Tool exclusive for R410A
Tools for other refrigerants can

be used if equipped with adop­ter for reverse flow check
Tools for other refrigerants
can be used by adjusting
flaring dimension
Tools can be used for other refrigerants
Tools can be used for other refrigerants
Tools can be used for other refrigerants
Tools can be used for other refrigerants
Tools can be used for other
refrigerants

Tool exclusive for R410A

Tools and materials Use R410A tools Can R22 tools be used?

(Usable if equipped
with adopter for rever­ se flow)

(Usable by adjusting
flaring dimension)

: 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.

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 time higher than that of R22, their sizes of flared sections and flare nuts are different.

1Thickness 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 0.7mm [7/256 inch] or below.)

2Dimensions 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 of its working pressure is higher than that of other
refrigerants. Therefore, to enhance air tightness and intensity, 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 intensity as shown below. Set copper pipe correctly referring to cop­per pipe flaring dimensions for R410A below. For 1/2 and 5/8 inch, the dimension B changes.
Use torque wrench corresponding to each dimension.

Dimension A

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

5

Dimension B

3 FEATURES

PUZ-A18NHA2
PUZ-A18NHA2-BS
PUY-A12/18NHA2
PUY-A12/18NHA2-BS

PUZ-A24/30/36NHA2
PUZ-A24/30/36NHA2-BS
PUY-A24/30/36NHA2
PUY-A24/30/36NHA2-BS

PUZ-A42NHA2
PUZ-A42NHA2-BS
PUY-A42NHA2
PUY-A42NHA2-BS

CHARGELESS SYSTEM
PRE-CHARGED REFRIGERANT IS SUPPLIED FOR PIPING LENGTH AT SHIPMENT.
(Max. 100ft, 30m (A42) / Max. 70ft, 20m (A12-36))

The refrigerant circuit with LEV(Linear Expansion Valve) and accumulator always control the optimal refrigerant level
regardless of the length (A42: 100ft, 30m max. / A12-36: 70ft, 20m max. and 16ft, 5m min.) of piping. The additional
refrigerant charging work during installation often causes problems.
It is completely eliminated by chargeless system. This unique system improves the quality and reliability of the work
done. It also helps to speed up the installation time.

6

4 SPECIFICATIONS

Service Ref. PUZ-A18NHA2 PUZ-A24NHA2 PUZ-A30NHA2 PUZ-A36NHA2 PUZ-A42NHA2
Power supply Phase Single

Cycle 60Hz

Voltage 208/230V
MCA A1318252526
MOCP A 20 30 40 40 40
Breaker size A 15 25 30 30 30
External finish Munsell 3Y 7.8/1.1
Heat exchanger Plate fin coil
Defrost method Reverse cycle
Crankcase heater
Compressor Hermetic

Model SNB130FPBM1 TNB220FLDM TNB220FLDM TNB220FLDM ANV33FDJMT

Motor output kW 0.85 1.3 1.3 1.3 2.5

R.L.A. 12 12 12 12 20

L.R.A. 14 14 17.5 17.5 27.5

Starter type Inverter
Fan Fan(drive) o No. Propeller fan o 1 Propeller fan o 1 Propeller fan o 1 Propeller fan o 1 Propeller fan o 2

Fan motor output

Fan motor

Airflow m
Sound level Cooling dB 46 48 48 48 51

Heating dB 47 50 50 50 55
Protection devices

Dimension W mm 800 950 950 950 950

D mm 300+23 330+30 330+30 330+30 330+30

H mm 600 943 943 943 1350

W in. 31-1/2 37-12/32 37-12/32 37-12/32 37-12/32

D in. 11-13/16 + 7/8 13 + 1-3/16 13 + 1-3/16 13 + 1-3/16 13 + 1-3/16

H in. 23-5/8 37-1/8 37-1/8 37-1/8 53-5/32
Weight kg 45 75 75 75 118

Refrigerant R410A

Charged kg 1.7 2.7 2.7 2.7 4.5

Control Linear expansion valve

Oil Model Ester (MEL56

Charged L 0.65 0.87 0.87 0.87 1.4
Refrigerant Pipe size OD mm 6.35 9.52 9.52 9.52 9.52

piping Liquid in. 1/4 3/8 3/8 3/8 3/8

Pipe size OD mm 12.7 15.88 15.88 15.88 15.88

Gas in. 1/2 5/8 5/8 5/8 5/8

Connection method Indoor Flared

Connection method Outdoor Flared

Height difference m Max. 30

IU - OU ft Max. 100

Piping length m Max. 30 Max. 50 Max. 50 Max. 50 Max. 50

PUZ-A18NHA2-BS PUZ-A24NHA2-BS PUZ-A30NHA2-BS PUZ-A36NHA2-BS PUZ-A42NHA2-BS

kW

kW

F.L.A.

3

/min 34 55 55 55 100

CFM 1200 1940 1940 1940 3530

lbs 99 165 165 165 260

lbs 3 + 12/16 6 6 6 10

oz 20 28 28 28 45

ft Max. 100 Max. 165 Max. 165 Max. 165 Max. 165

0.040 0.075 0.075 0.075 0.086 + 0.086

0.35 0.75 0.75 0.75 0.40 + 0.40

HP switch HP switch HP switch HP switch HP switch

Discharge thermo Discharge thermo Discharge thermo Discharge thermo Discharge thermo

-

LP switch

)

Ether (FV50S

)

7

Service Ref.

PUY-A12NHA2 PUY-A18NHA2 PUY-A24NHA2 PUY-A30NHA2 PUY-A36NHA2 PUY-A42NHA2

PUY-A12NHA2-BS PUY-A18NHA2-BS PUY-A24NHA2-BS PUY-A30NHA2-BS PUY-A36NHA2-BS PUY-A42NHA2-BS

Power supply

Phase Single
Cycle 60Hz

Voltage 208/230V
MCA A131318252526
MOCP A 15 20 30 40 40 40
Breaker size A 15 15 25 30 30 30
External finish Munsell 3Y 7.8/1.1
Heat exchanger Plate fin coil
Defrost method ­Crankcase heater

kW

-

Compressor Hermetic

Model SNB130FPBM1 SNB130FPBM1 TNB220FLDM TNB220FLDM TNB220FLDM ANV33FDJMT

Motor output kW 0.85 0.85 1.3 1.3 1.3 2.5

R.L.A. 12 12 12 12 12 20

L.R.A. 14 14 14 17.5 17.5 27.5

Starter type Inverter
Fan

Fan (drive) o No.

Propeller fan

o

1 Propeller fan

o

1 Propeller fan

o

1 Propeller fan

o

1 Propeller fan

o

1 Propeller fan

o

2

Fan motor output

kW

0.040 0.040 0.075 0.075 0.075 0.086 + 0.086

Fan motor

F.L.A.

0.35 0.35 0.75 0.75 0.75 0.40 + 0.40

Airflow m

3

/min 34 34 55 55 55 100

CFM 1200 1200 1940 1940 1940 3530

Sound level Cooling dB 46 46 48 48 48 51

Heating dB – – – – – –
Protection devices HP switch HP switch HP switch HP switch HP switch HP switch

LP switch

Discharge thermo Discharge thermo Discharge thermo Discharge thermo Discharge thermo Discharge thermo

Dimension W mm 800 800 950 950 950 950

D mm 300+23 300+23 330+30 330+30 330+30 330+30

H mm 600 600 943 943 943 1350

W in. 31-1/2 31-1/2 37-12/32 37-12/32 37-12/32 37-12/32

D in. 11-13/16 + 7/8 11-13/16 + 7/8 13 + 1-3/16 13 + 1-3/16 13 + 1-3/16 13 + 1-3/16

H in. 23-5/8 23-5/8 37-1/8 37-1/8 37-1/8 53-5/32
Weight kg 41 44 74 74 74 117

lbs 90 97 163 163 163 258

Refrigerant R410A

Charged kg 1.3 1.7 2.7 2.7 2.7 4.5

lbs 2 +14/16 3 + 12/16 6 6 6 10
Control Linear expansion valve
Oil Model Ester (MEL56

)

Charged L 0.65 0.65 0.87 0.87 0.87 1.4

Ether (FV50S

)

oz 20 20 28 28 28 45
Refrigerant Pipe size OD mm 6.35 6.35 9.52 9.52 9.52 9.52
piping Liquid in. 1/4 1/4 3/8 3/8 3/8 3/8

Pipe size OD mm 12.7 12.7 15.88 15.88 15.88 15.88
Gas in. 1/2 1/2 5/8 5/8 5/8 5/8
Connection method Indoor Flared
Connection method Outdoor

Flared
Height difference m Max. 30 Max. 30 Max. 30 Max. 30 Max. 30 Max. 30
IU - OU ft Max. 100 Max. 100 Max. 100 Max. 100 Max. 100 Max. 100
Piping length m Max. 30 Max. 30 Max. 50 Max. 50 Max. 50 Max. 50

ft Max. 100 Max. 100 Max. 165 Max. 165 Max. 165 Max. 165

8

Piping Length (one way

)

Charged

Factory

Service Ref. 50ft 60ft 70ft 80ft 90ft 100ft 110ft 120ft 130ft 140ft 150ft 160ft 165ft

15m 18m 21m 24m 27m 30m 33m 37m 40m 43m 46m 49m 50m

PUY-A12NHA2-BS

PUY-A12NHA2

42 oz 44 oz 46 oz 48 oz 50 oz 52 oz - - - - - - - 46 oz

1.2 kg 1.2 kg 1.3 kg 1.4 kg 1.4 kg 1.5 kg - - - - - - - 1.3 kg

PUY-A18NHA2-BS

PUY-A18NHA2

PUZ-A18NHA2-BS

PUZ-A18NHA2

56 oz 58 oz 60 oz 62 oz 64 oz 66 oz - - - - - - - 60 oz

1.6 kg 1.6 kg 1.7 kg 1.8 kg 1.8 kg 1.9 kg - - - - - - - 1.7 kg

PUY-A24NHA2-BS

PUY-A24NHA2

PUZ-A24NHA2-BS

PUZ-A24NHA2

84 oz 90 oz 96 oz 102 oz 108 oz 114 oz 120 oz 126 oz 132 oz 138 oz 144 oz 150 oz 156 oz 96 oz

2.4 kg 2.6 kg 2.7kg 2.9 kg 3.1 kg 3.2 kg 3.4 kg 3.6 kg 3.7 kg 3.9 kg 4.1 kg 4.3 kg 4.4 kg 2.7 kg

PUY-A30NHA2-BS

PUY-A30NHA2

PUZ-A30NHA2-BS

PUZ-A30NHA2

84 oz 90 oz 96 oz 102 oz 108 oz 114 oz 120 oz 126 oz 132 oz 138 oz 144 oz 150 oz 156 oz 96 oz

2.4 kg 2.6 kg 2.7kg 2.9 kg 3.1 kg 3.2 kg 3.4 kg 3.6 kg 3.7 kg 3.9 kg 4.1 kg 4.3 kg 4.4 kg 2.7 kg

PUY-A36NHA2-BS

PUY-A36NHA2

PUZ-A36NHA2-BS

PUZ-A36NHA2

84 oz 90 oz 96 oz 102 oz 108 oz 114 oz 120 oz 126 oz 132 oz 138 oz 144 oz 150 oz 156 oz 96 oz

2.4 kg 2.6 kg 2.7kg 2.9 kg 3.1 kg 3.2 kg 3.4 kg 3.6 kg 3.7 kg 3.9 kg 4.1 kg 4.3 kg 4.4 kg 2.7 kg

PUY-A42NHA2-BS

PUY-A42NHA2

PUZ-A42NHA2-BS

PUZ-A42NHA2

132 oz 136 oz 142 oz 148 oz 154 oz 160 oz 166 oz 172 oz 178 oz 184 oz 190 oz 196 oz 202 oz 160 oz

3.7 kg 3.9 kg 4.0 kg 4.2 kg 4.4 kg 4.5 kg 4.7 kg 4.9 kg 5.0 kg 5.2 kg 5.4 kg 5.6 kg 5.7 kg 4.5 kg

Longer pipe than 70 or 100 ft, additional charge is required.

PUZ-A42NHA2

Service Ref.

PUZ-A42NHA2-BS
PUY-A42NHA2
PUY-A42NHA2-BS

Compressor model SNB130FPBM1 TNB220FLDM ANV33FDJMT

(')

Winding Registance

U-V 0.320 0.880 0.266
U-W 0.320 0.880 0.266
W-V 0.320 0.880 0.266

(

at 20˚C, 68˚F

)

PUY-A12,18NHA2-BS

PUY-A12,18NHA2

PUZ-A18NHA2-BS

PUZ-A18NHA2

PUY-A24,30,36NHA2-BS

PUY-A24,30,36NHA2

PUZ-A24,30,36NHA2-BS

PUZ-A24,30,36NHA2

5

DATA

5-1. REFILLING REFRIGERANT CHARGE (R410A : oz, kg)

5-2. COMPRESSOR TECHNICAL DATA

9

5-3. NOISE CRITERION CURVES

5ft

3.3ft

MICROPHONE

UNIT

GROUND

90

80

70

60

50

40

30

20

10

63 125 250 500 1000 2000 4000 8000

APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

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

BAND CENTER FREQUENCIES, Hz

PUY-A12/18NHA2
PUY-A12/18NHA2-BS
PUZ-A18NHA2
PUZ-A18NHA2-BS

COOLING

MODE

HEATING

46

SPL(dB)

47

LINE

90

80

70

60

50

40

30

20

10

63 125 250 500 1000 2000 4000 8000

APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

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

BAND CENTER FREQUENCIES, Hz

PUY-A24/30/36NHA2
PUY-A24/30/36NHA2-BS
PUZ-A24/30/36NHA2
PUZ-A24/30/36NHA2-BS

COOLING

MODE

HEATING

48

SPL(dB)

50

LINE

90

80

70

60

50

40

30

20

10

63 125 250 500 1000 2000 4000 8000

APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

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

BAND CENTER FREQUENCIES, Hz

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

PUY-A42NHA2
PUY-A42NHA2-BS
PUZ-A42NHA2
PUZ-A42NHA2-BS

COOLING

MODE

HEATING

51

SPL(dB)

55

LINE

10

5-4. STANDARD OPERATION DATA

5-4-1. Heat pump

Representative matching

PKA-A18GA PKA-A24FA PKA-A30FA PKA-A36FA PLA-A42BA

Mode

COOLING HEATING COOLING HEATING COOLING HEATING COOLING HEATING COOLING HEATING

Total Capacity BTU/h

18,000 19,000 24,000 26,000 30,000 32,000 34,200 37,000 42,000 45,000

Input W

2,240 2,130 2,650 2,570 4,400 3,660 5,030 3,610 4,600 4,450

Electrical circuit

Indoor unit model

PKA-A18GA PKA-A24FA PKA-A30FA PKA-A36FA PLA-A42BA

Phase

Single Single Single Single Single

Cycle

60Hz 60Hz 60Hz 60Hz 60Hz

Voltage

230V 230V 230V 230V 230V

Current

0.33A 0.43A 0.43A 0.52A 1.00A 0.94A

Outdoor unit model

PUZ-A18NHA2 PUZ-A24NHA2 PUZ-A30NHA2 PUZ-A36NHA2 PUZ-A42NHA2

Phase

Single Single Single Single Single

Cycle

60Hz 60Hz 60Hz 60Hz 60Hz

Voltage

230V 230V 230V 230V 230V

Current

9.71A 9.22A 11.45A 11.09A 19.29A 15.98A 22.03A 15.66A

Refrigerant circuit

Discharge pressure MPa 3.14 3.38 2.85 3.03 2.99 3.50 3.22 2.95
Suction pressure MPa 0.81 0.64 0.86 0.69 0.72 0.65 0.76 0.60
Discharge temperature : 81.6 89.0 72.6 79.3 83.7 92.4 88.8 83.0
Condensing temperature : 52.0 51.6 46.8 49.6 49.1 55.9 51.5 48.0
Suction temperature : 4.8 -1.2 7.0 -0.3 1.2 -1.6 3.3 -2.0
Ref. Pipe length m 7.6 7.6 7.6 7.6 7.6 7.6 7.6 7.6

20.35A

2.83

0.82

73.4

47.5

4.9

7.6
410
120
164
118

40

21.48A

2.93

0.69

80.3

47.5

0.3

7.6
425
100
177
118

33

Discharge pressure PSIG 455 490 414 440 434 508 467 428
Suction pressure PSIG 118 93 125 99 104 94 110 87
Discharge temperature ˚F 179 192 163 175 183 198 192 181
Condensing temperature ˚F 126 125 116 121 120 133 125 118
Suction temperature ˚F 41 30 45 31 34 29 38 28
Ref. Pipe length ft 25 25 25 25 25 25 25 25 25 25

side

Indoor

Intake air temperature DB : 26.7 21.1 26.7 21.1 26.7 21.1 26.7 21.1 26.7 21.1
Intake air temperature WB : 19.4 15.6 19.4 15.6 19.4 15.6 19.4 15.6 19.4 15.6
Discharge air temperature DB : 12.2 45.4 13.7 40.5 12.1 45.7 13.7 40.9 12.9 41.9

side

Outdoor

Intake air temperature DB : 35 8.3 35 8.3 35 8.3 35 8.3 35 8.3
Intake air temperature WB : 23.9 6.1 23.9 6.1 23.9 6.1 23.9 6.1 23.9 6.1

side

Indoor

Intake air temperature DB ˚F 80 70 80 70 80 70 80 70 80 70
Intake air temperature WB ˚F 67 60 67 60 67 60 67 60 67 60
Discharge air temperature DB ˚F 54 114 57 105 54 114 57 106 55 107

side

Outdoor

Intake air temperature DB ˚F 95 47 95 47 95 47 95 47 95 47

Intake air temperature WB ˚F 75 43 75 43 75 43 75 43 75 43
SHF 0.70 0.78 0.70 0.77 0.71
BF 0.12

–
–

–
–

–
–

–
–

–
– 0.10 0.11 0.11 0.15

11

Representative matching

PKA-A12GA PKA-A18GA PKA-A24FA PKA-A30FA PKA-A36FA PLA-A42BA

Mode

COOLING COOLING COOLING COOLING COOLING COOLING

Total Capacity BTU/h

12,000 18,000 24,000 30,000 34,200 42,000

Input W

1,210 2,240 2,650 4,400 5,030 4,600

Electrical circuit

Indoor unit model

PKA-A12GA PKA-A18GA PKA-A24FA PKA-A30FA PKA-A36FA PLA-A42BA

Phase

Single Single Single Single Single Single

Cycle

60Hz 60Hz 60Hz 60Hz 60Hz 60Hz

Voltage

230V 230V 230V 230V 230V 230V

Current

0.33A 0.33A 0.43A 0.43A 0.52A 1.00A

Outdoor unit model

PUY-A12NHA2 PUY-A18NHA2 PUY-A24NHA2 PUY-A30NHA2 PUY-A36NHA2 PUY-A42NHA2

Phase

Single Single Single Single Single Single

Cycle

60Hz 60Hz 60Hz 60Hz 60Hz 60Hz

Voltage

230V 230V 230V 230V 230V 230V

Current

5.09A 9.71A 11.45A 19.29A 22.03A 20.35A

Refrigerant circuit

Discharge pressure MPa 2.99 3.14 2.85 2.99 3.22
Suction pressure MPa 1.00 0.81 0.86 0.72 0.76
Discharge temperature : 72.8 81.6 72.6 83.7 88.8
Condensing temperature : 50.7 52.0 46.8 49.1 51.5
Suction temperature : 11.1 4.8 7.0 1.2 3.3
Ref. Pipe length m 7.6 7.6 7.6 7.6 7.6

2.83

0.82

73.4

47.5

4.9

7.6
410
120
164
118

40

Discharge pressure PSIG 434 455 414 434 467
Suction pressure PSIG 145 118 125 104 110
Discharge temperature F 163 179 163 183 192
Condensing temperature F 123 126 116 120 125
Suction temperature F 52 41 45 34 38
Ref. Pipe length ft 25 25 25 25 25 25

side

Indoor

Intake air temperature DB : 26.7 26.7 26.7 26.7 26.7 26.7
Intake air temperature WB : 19.4 19.4 19.4 19.4 19.4 19.4

12.9

Discharge air temperature DB : 14.8 12.2 13.7 12.1 13.7

side

Outdoor

Intake air temperature DB : 35 35 35 35 35 35
Intake air temperature WB : 23.9 23.9 23.9 23.9 23.9 23.9

side

Indoor

Intake air temperature DB ˚F 80 80 80 80 80 80
Intake air temperature WB ˚F 67 67 67 67 67 67

55

Discharge air temperature DB ˚F 59 54 57 54 57

side

Outdoor

Intake air temperature DB ˚F 95 95 95 95 95 95

Intake air temperature WB ˚F 75 75 75 75 75 75
SHF 0.86 0.70 0.78 0.70 0.77 0.71
BF 0.09 0.12 0.10 0.11 0.11 0.15

5-4-2. Cooling only

12

1/2 conduit hole

144<5-21/32>

2-ø22.2<7/8>

22<7/8>

38<1-1/2>241<9-1/2>

Min.100mm<3-15/16>

Piping and wiring connection can
be made from the rear direction only.

*1 In the place where short cycle tends to occur, cooling and heating
capacity and power consumption might get lowered by 10%. Air outlet
guide (optional PAC-SG58SG-E) will help them improve.
*2 If air is discharged to the wall, the surface might get stained.

2 sides should be open in
the right, left and rear side.

Min.100mm<3-15/16> as long as
no obstacle is placed on the
rear and right-and-left sides
of the unit

*1
*2

*1

Air intake

Air outlet

4-oval hole

Air intake

Service panel

Connection for liquid pipe

Service panel for charge plug

Service port

Connection for gas pipe

Min.100mm<3-15/16>

Min.500mm<19-11/16>

Min.350mm<13-25/32>

Basically

open

Max.

<Foundation bolt height>

FOUNDATION

Please secure the unit firmly
with 4 foundation M10<W3/8> bolts.
(Bolts, washers and nut must

be purchased locally.)

18mm<23/32>

[33<1-5/16> drain hole

43.6<1-23/32>

152<6>

155

400<15-25/32>

347.5<13-11/16>

45.4<1-25/32>

365<14-3/8>

330<13>

300<11-13/16>

40<1-9/16>

Handle

600<23-5/8>

10<3/8>

300<11-13/16>

150<5-29/32>

287.5<11-11/32>

500<19-11/16>

800<31-1/2>

69<2-23/32>

183<7-7/32>

90<3-17/32>

155<6-3/32>

23<29/32>

32.5<1-9/32>

18<23/32>

FLARE [12.7<1/2>

FLARE [6.35<1/4>

Installation bolt pitch

PIPING-WIRING DIRECTION

Minimum installation space for outdoor unit

Free space around the outdoor unit
(basic example)

FOUNDATION BOLTS

6

OUTLINES AND DIMENSIONS

OUTDOOR UNIT Unit : mm<inch>
PUZ-A18NHA2 PUZ-A18NHA2-BS PUY-A12/18NHA2 PUY-A12/18NHA2-BS

13

PUZ-A24/30/36NHA2 PUZ-A24/30/36NHA2-BS Unit : mm<inch>

,

,,,,

,,,,,,

,,,,,

,,,,,,

,,,,,

,,

,,,,

,

,

,

,,

,,,

,

,,

,

,,
,

,

,,

,,,

,,

,

,

,,,

,

,,

,

,

,

,

,

,

,,

,,

,

,

,

,

,

,,,

,

,

,

,,,

,,,,

,

,

,

,,

,,

,,

,

,

,,

,

,

,

,

,,

,,

,

,,

,

,,

Min. 10mm

<3/8>

Min. 10mm

<3/8>

Min. 100mm

<3-15/16>

Min. 500mm

<19-11/16>

100mm

Min.

<3-15/16>

500mm

Min.

<19-11/16>

500mm

Min.

<19-11/16>

10mm

Min.

<3/8>

Service space

,,

,,,

,,,,

,,,,

,,,,

,,,

Max.

30mm<1-3/16>

FOUNDATION

<Foundation bolt height>

31<1-7/32>

74<2-19/32>

40<1-9/16>

When installing the conduit,

set the attachment to the

inner side of each panel.

1/2 Conduit attachment

2-

[

22.2<7/8>

330 <13>

175 <6-7/8>

600 <23-5/8>

175 <6-7/8>

53 <2-3/32>

28 <1-3/32> 370 <14-9/16>

19 <3/4>

56 <2-7/32>

45 <1-25/32>

42 <1-21/32>66 <2-5/8>

417 <16-13/32>

2-U Shaped notched hole

(Foundfation Bolt M10<W3/8>)

Side Air Intake

Rear Air Intake

Air outlet

2-12o36oval hole

(Foundation Bolt M10<W3/8>)

30 <1-3/16>

Side Air Intake

Handle

Rear piping cover

Front piping cover

81<3-3/16>

219 <8-5/8>

145

<5-23/32>

220

<8-21/32>

30 <1-3/16>

145

<5-23/32>

71 <2-13/16>

71 <2-13/16>

145

<5-23/32>

Bottom piping hole

(Knockout)

Drain hole

(5-

[

33<1-5/16>)

Handle

Handle

Rear Air Intake

Air Intake

670 <26-3/8>

*1 443<17-7/16>

*1 447<17-19/32>

322 <12-11/16>

950 <37-13/32>

473 <18-5/8>

943 <37-1/8>

23<29/32>

2

1

Handle

Handle

Service panel

Earth terminal

Left . . . Power supply wiring

Reight . . Indoor/Outdoor wiring

Terminal Block

63<2-1/2>

73<2-7/8>

75

<2-31/32>

40 <1-9/16>

92<3-5/8>

92<3-5/8>

27<1-1/16>23<29/32>

55<2-3/16>

19<3/4>

Conduit hole

(2-

[

27<1-1/16>Knockout)

Right trunking hole

(Knockout)

Right piping hole

(Knockout)

[

92

<

3-5/8>

45<1-25/32>

65<2-9/16>

92<3-5/8>

40 <1-9/16>

63

<2-1/2>

23<29/32>

73<2-7/8>

55<2-3/16>

27<1-1/16>

Conduit hole

(2-

[

27<1-1/16>Knockout)

Front trunking hole

(Knockout)

Front piping hole

(Knockout)

[92

<3-5/8>

40 <1-9/16>45<1-25/32>

63<2-1/2>

73<2-7/8>23<29/32

55<2-3/16>

27<1-1/16>

92<3-5/8>

65<2-9/16>

Conduit hole

(2-

[

27<1-1/16>Knockout)

Rear trunking hole

(Knockout)

Rear piping hole

(Knockout)

[

92

<3-5/8>

FREE

Piping and wiring connections

can be made from 4 directions:

front, right, rear and below.

Dimensions of space needed

for service access are

shown in the below diagram.

Please secure the unit firmly

with 4 foundation (M10<W3/8>)

bolts. (Bolts and washers must

be purchased locally.)

The diagram below shows a

basic example.

Explantion of particular details is

given in the installation manuals etc.

1

····Refrigerant GAS pipe connction (FLARE) [15.88(5/8)

2

····Refrigerant LIQUID pipe connection (FLARE) [ 9.52(3/8)
*1···· Indication of STOP VALVE connection location.

Example of Notes

Piping Knockout Hole Details

1 FREE SPACE (Around the unit)

2 SERVICE SPACE

3 FOUNDATION BOLTS

4 PIPING-WIRING DIRECTIONS

PUY-A24/30/36NHA2 PUY-A24/30/36NHA2-BS

,,

14

PUZ-A42NHA2 PUZ-A42NHA2-BS Unit : mm<inch>

Terminal Block

Left ··· Power supply wiring

Right ··· Indoor/Outdoor wiring

Earth terminal

Service panel

Handle

1

2

1350<53-5/32>

23<29/32>

950<37-13/32>

1076<42-3/8>

* 1 447<17-19/32>

* 1 443<17-7/16>

371<14-19/32>

635<25>

322<12-11/16>

Handle

,,

,

,,

,

,

,

,

,

,,,

,,

,

,,

,,

,,

,,

,

,

,

,

,

,,,,

,

,

,,,,,,

,

,,

,,

,

,

,

,

,

,,

,

,,

,

,,

,,

,

,,

,,

,

,

,,

,,

,

,

,,

,

,

,,,,

,,,,

,,,,,

,,,,

,,,,

,,,

,,,,,

,,,,,,

,,,,,,

,,,,,,

,,,

,,,,,

,,

,,

,

,,

,,,

,

,

,,

,

,

,,

,

,

Min. 1000mm

<39-3/8>

Min. 150mm

<5-29/32>

Min. 10mm

<3/8>

Min. 10mm

<3/8>

FREE

Max.

Min.

Min.

Min.

Min.

Handle

Side Air Intake

Front piping cover

Rear piping cover

Air intake

Rear Air Intake

Handle

Handle

<Foundation bolt height>

Air outlet

Rear Air Intake

Side Air Intake

30mm<1-3/16>

FOUNDATION

150mm

<5-29/32>

500mm

<19-11/16>

500mm

<19-11/16>

10mm<3/8>

Service space

40<1-9/16>

74<2-19/32>

31<1-7/32>

When installing the conduit.

set the attachment to the

inner side of each panel.

2-

[

22.2<7/8>

1/2 Conduit attachment

600<23-5/8>

175

<6-7/8>

175

<6-7/8>

330<13>

417<16-13/32>

42<1-21/32>

66<2-5/8>

53<2-3/32> 56<2-7/32>

45<1-25/32>

19<3/4>

28<1-3/32> 370<14-9/16>

2-U Shaped notched hole

(Foundation Bolt M10<W3/8>)

2-12o36 Oval hole

(Foundation Bolt M10<W3/8>)

30<1-3/16>

45<1-25/32>

40<1-9/16>

65<2-9/16>

92<3-5/8>

27<1-1/16>

55<2-3/16>

23<29/32> 73<2-7/8>

63<2-1/2>

Rear piping hole

(Knockout)

Rear trunking hole

(Knockout)

Conduit hole

(2-[27<1-1/16>Knockout)

[92

<3-5/8>

19<3/4>

55<2-3/16>

92<3-5/8>

75

<2-31/32>

40<1-9/16>

73<2-7/8>

63<2-1/2>

23<29/32> 27<1-1/16>

92<3-5/8>

Right piping hole

(Knockout)

Right trunking hole

(Knockout)

Conduit hole

(2-[27<1-1/16>Knockout)

[92

<3-5/8>

92<3-5/8>

65<2-9/16>

45<1-25/32>40<1-9/16>

27<1-1/16>

55<2-3/16>

23<29/32> 73<2-7/8>

63

<2-1/2>

Front piping hole

(Knockout)

Front trunking hole

(Knockout)

Conduit hole

(2-[27<1-1/16>Knockout)

[92

<3-5/8>

145

<5-23/32>

145

<5-23/32>

220

<8-21/32>

30<1-3/16>

145

<5-23/32>

81<3-3/16>

219<8-5/8>

71<2-13/16>

71<2-13/16>

Bottom piping hole

(Knockout)

Drain hole

5-

[

33<1-5/16>

The diagram below shows a

basic example.

Explantion of particular details is

given in the installation manuals etc.

Dimensions of space needed

for service access are

shown in the below diagram.

Please secure the unit firmly

with 4 foundation (M10<W3/8>)

bolts. (Bolts and washers must

be purchased locally.)

1 . . .Refrigerant GAS pipe connction (FLARE) [15.88(5/8)

2 . . .Refrigerant LIQUID pipe connection (FLARE) [ 9.52(3/8)

*1 . . .Indication of STOP VALVE connection location.

Piping and wiring connections

can be made from 4 directions:

front, right, rear and below.

Example of Notes

1 FREE SPACE (Around the unit)

2 SERVICE SPACE

3 FOUNDATION BOLTS

4 PIPING-WIRING DIRECTIONS

Piping Knockout Hole Details

PUY-A42NHA2 PUY-A42NHA2-BS

,

15

7

WIRING DIAGRAM

PUZ-A18NHA2 PUZ-A18NHA2-BS PUY-A12/18NHA2 PUY-A12/18NHA2-BS

[LEGEND]

SYMBOL
TB1
MC
MF1
21S4
63H
TH3
TH4
TH6
TH7
TH8
LEV-A
ACL
CY1,CY2
P.B.

R/S
U/V/W

MF1

MS
3~

Terminal Block<Power Supply, Indoor/Outdoor>
Motor for Compressor
Fan Motor

Solenoid Valve (Four-Way Valve)

High Pressure Switch

Thermistor<Outdoor Pipe>

Thermistor<Discharge>
Thermistor<Outdoor 2-Phase Pipe>
Thermistor<Outdoor>
Thermistor<Heatsink>
Electronic Expansion Valve

Reactor
Capacitor
Power Circuit Board
Connection Terminal<L1/L2-Phase>
Connection Terminal<U/V/W-Phase>

C. B.

1

3

1

CNDC
(PNK)

CNS

(WHT)

31

NAME SYMBOL NAME SYMBOL NAME

PFC
IPM
CB1~CB3

N.F.

LI/LO
NI/NO
EI,E2,E3
52C

C.B.

SW1
SW4

SW5
SW6
SW7
SW8

°

412121

TH3

TH4

(WHT)

(WHT)

CN2

(WHT)

5

F3

F4

63H

63H

(YLW)

71

31

7

CNF1

(WHT)

F2

F1

TRANS

CNAC

(WHT)

TH7 TH6 TH3 TH4

t°t°t°t

TH7/6
(RED)

21
43

Converter
Power Module
Main Smoothing Capacitor
Noise Filter Circuit Board
Connection Terminal<L1-Phase>
Connection Terminal<L2-Phase>
Connection Terminal<Ground>
52C Relay
Controller Circuit Board

Forced Defrost, Defect History

Switch<
Record Reset, Refrigerant Address>

Switch<Test Operation>
Switch<Function Switch>
Switch<Model Select>
Switch<Function Setup>
Switch<Function Setup>

LEV-A

LED2

M

LEV-A

(WHT)

LED1

21S4

(GRN)

2

61

(WHT)

21S4

1

CN4

CNVMNT

(WHT)

(WHT)

12

X52

13 13

PUZ only

3

CNM

31

SS

(WHT)

CNMNT

(WHT)

CN52C

(RED)

221

5

51

SW5SW8SW4 SWP

14

X51

SW6SW1

CN31

w1w1

When M-NET adapter is connected

5

SW7

SW9

3151

(WHT)

CNDM

CN51

(WHT)

SW9

LED1,LED2
F1~F4
SWP
CN31
SS
CNM
CNMNT

CNVMNT

CNDM
X51, X52

5

1

2

1

ABS

TB7

M-NET

Switch
LED<Operation Inspection Indicators>
Fuse<T6.3AL250V>
Switch<Pump Down>
Connector<Emergency Operation>
Connector<Connection for Option>
Connector<A-Control Service Inspection Kit>
Connector
<Connected to Optional M-NET Adapter Board>
Connector
<Connected to Optional M-NET Adapter Board>
Connector
< Connection for Option (Contact Input)>
Relay

CN5

LED2
LED3
LED4

M-NET SUBSTRATE

CN2M

LED5

(WHT)

(WHT)

SW1

LED1

CND

(WHT)

31

3

SW11

SW12

P. B.

PFC

R

RED

WHT

S

CB1 CB2 CB3

w1 MODEL SELECT

MODEL SW6

ON

PUZ-A18N

OFF

PUY-A12N

PUY-A18N

123456

ON

OFF

123456

ON

OFF

123456

78

78

78

w2. SW5-1 to 4 : Function switch

MC

MS

3~

UVW

BLK

WHT

RED

SW5-5.6

ON

OFF

123456

ON

OFF

123456

ON

OFF

123456

CY1
CY2

TB1

RED

LO NO

1

3

(RED)

CNAC2

1

3

(WHT)

CNAC1

LI EI NI

WHT

N. F.

M-NET ADAPTER

SYMBOL

TB7

2

52C

U

1
2

(BLK)

CN52C

E3

CN5

(RED)

1

2

2

E2

U

Terminal Block<M-net connection>

CN5

Connector<Transmission>

CND

Connector<Power Supply>

CN2M

Connector<M-NET communication>

SW1

Switch<Status of communication>

SW11

Switch<Address setting : 1st digit>

SW12

Switch<Address setting : 2nd digit>

LED1

LED<Power Supply : DC5V>

LED2

LED<Connection to Outdoor Unit>

LED3

LED<Transmission : Sending>

LED4

LED<Transmission : Recelving>

LED5

LED<Power Supply : DC12V>

NAME

ACL

IPM

CN5

(RED)

CN4

(WHT)

CN3

(WHT)

CN2

(WHT)

RED

RED

WHT

2

1
2

2

1
2

1
2

°

t

TH8

5

1

7

YLW

ORN

BRN

BLU

GRN

RED

WHT

U

V

W

w2

L1 L2 GR S1 S2 S3

POWER SUPPLY
208 / 230V 60Hz

INDOOR
UNIT

wUse copper supply wires.

16

P. B.

C. B.

CNF1

(WHT)

MF1

MS

3~

7

1

TRANS

CNDC
(PNK)

3

1

TH7/6
(RED)

63H

(YLW)

TH3

(WHT)

TH4

(WHT)

TH7 TH6 TH3 TH4

412121

31

t≈ t° t° t°

63H

LEV-A

(WHT)

LEV-A

M

LED1

LED2

61

CNVMNT

(WHT)

31

CNDM

(WHT)

CN51

(WHT)

3151

CNMNT

(WHT)

CNM

(WHT)

51

3

5

SW7

SW6SW1

SW9

CN31

1

w1

w

1

SW5SW8SW4 SWP

14

X51

CNS

(WHT)

CNAC

(WHT)

SS

(WHT)

21S4

(GRN)

X52

F1

F2

F4

F3

21

43

21S4

31

13

SV2

(BLU)

X55

SV

13 13

CN4

(WHT)

12

2

CN52C

(RED)

221

CN2

(WHT)

71

5

CN5

(WHT)

31

LED2

SW1

SW11

SW12

LED3
LED4

TB7

LED1

LED5

2
1

CND

(WHT)

CN2M

(WHT)

M-NET SUBSTRATE

M-NET

ABS

When M-NET adapter is connected

5

3

5

1

WHT

U

U

LI EINI

LO NO

E2

E3

N. F.

2

2

1

3

1

1

3

2

1

2

CN5

(RED)

CNAC1

(WHT)

CNAC2

(RED)

CN52C

(BLK)

52C

RED

POWER SUPPLY
208 / 230V 60Hz

INDOOR
UNIT

TB1

S1 S2 S3

RED

BLU

YLW

GRN

ORN

BRN

CY2

CY1

CB1 CB2 CB3

U
V

TH8

IPM

W

R

S

CN3

(WHT)

CN2

(WHT)

CN4

(WHT)

CN5

(RED)

1

7

1
2

1
2

1
2

2

2

5

t°

WHT

RED

PFC

RED

WHT

RED

WHT

ACL

MS

3~

BLK

WHT

RED

UVW

MC

PUZ only

L1 L2 GR

SYMBOL

M-NET ADAPTER

NAME
TB7
CN5
CND
CN2M
SW1
SW11

Terminal Block<M-net connection>
Connector<Transmission>
Connector<Power Supply>
Connector<M-NET communication>
Switch<Status of communication>

Switch<Address setting : 1st digit>
SW12
LED1
LED2
LED3
LED4
LED5

Switch<Address setting : 2nd digit>

LED<Power Supply : DC5V>

LED<Connection to Outdoor Unit>

LED<Transmission : Sending>

LED<Transmission : Recelving>

LED<Power Supply : DC12V>

TB1
MC
MF1
21S4
63H

TH3
TH4
TH6
TH7
TH8
LEV-A
ACL

Terminal Block<Power Supply, Indoor/Outdoor>
Motor for Compressor
Fan Motor

Solenoid Valve (Four-Way Valve)

High Pressure Switch

SV Solenoid Valve (Bypass Valve)

Thermistor<Outdoor Pipe>

Thermistor<Discharge>
Thermistor<Outdoor 2-Phase Pipe>
Thermistor<Outdoor>
Thermistor<Heatsink>
Electronic Expansion Valve

Reactor

Power Circuit Board

Connection Terminal<U/V/W-Phase>

P.B.

U/V/W

Noise Filter Circuit Board
Connection Terminal<L1-Phase>

Connection Terminal<Ground>

N.F.

LI/LO

Connection Terminal<L2-Phase>

NI/NO
EI,E2,E3

Fuse<T6.3AL250V>

Controller Circuit Board
Switch<Forced Defrost, Defect History
Record Reset, Refrigerant Address>
Switch<Test Operation>
Switch<Function Switch>

Switch<Function Setup>

Switch<Pump Down>
Connector<Emergency Operation>

F1~F4

SW1
SW4

SW5
SW7

Switch<Function Setup>

SW8

SWP
CN31

CNM

CNVMNT

CNDM

LED1,LED2

LED<Operation Inspection Indicators>

Connector<A-Control Service Inspection Kit>

Connector
<Connected to Optional M-NET Adapter Board>

Connector
< Connection for Option (Contact Input)>

C.B.

Converter

PFC

52C Relay

52C

SYMBOL

[LEGEND]

NAME SYMBOL NAME SYMBOL NAME

Connection Terminal<L1/L2-Phase>

R/S

CNMNT

Connector
<Connected to Optional M-NET Adapter Board>

Switch<Model Select>

SW6

Switch

SW9

X51,X52,X55

Relay

Power Module

IPM

Main Smoothing Capacitor

CB1~CB3

CY1,CY2

Capacitor

123456

OFF

ON

PUZ-A24N

MODEL SW6

w1 MODEL SELECT

SW5-5.6

123456

OFF

ON

PUY-A24N

7878123456

OFF

ON

123456

OFF

ON

w2

w2. SW5-1 to 4 : Function switch

Connector<Connection for Option>

SS

wUse copper supply wires.

PUZ-A24NHA2 PUZ-A24NHA2-BS PUY-A24NHA2 PUY-A24NHA2-BS

17

SYMBOL

M-NET ADAPTER

NAME

TB7
CN5
CND
CN2M
SW1
SW11
SW12
LED1
LED2
LED3
LED4
LED5

Terminal Block<M-net connection>
Connector<Transmission>
Connector<Power Supply>
Connector<M-NET communication>
Switch<Status of communication>
Switch<Address setting : 1st digit>
Switch<Address setting : 2nd digit>
LED<Power Supply : DC5V>
LED<Connection to Outdoor Unit>
LED<Transmission : Sending>
LED<Transmission : Recelving>
LED<Power Supply : DC12V>

TB1
MC
MF1
21S4

63H
TH3
TH4
TH6
TH7
TH8
LEV-A
DCL

52C

Terminal Block<Power Supply, Indoor/Outdoor >
Motor for Compressor
Fan Motor

Solenoid Valve (Four-Way Valve)

High Pressure Switch

SV Solenoid Valve (Bypass Valve)

Thermistor<Outdoor Pipe>

Thermistor<Discharge>
Thermistor<Outdoor 2-Phase Pipe>
Thermistor<Outdoor>
Thermistor<Heatsink>
Electronic Expansion Valve

Reactor

52C Relay

ACTM

Active Filter Module

Power Circuit Board
Connection Terminal<U/V/W-Phase>

Diode Bridge

P.B.

TABU/V/W

Noise Filter Circuit Board
Connection Lead<L1-Phase>

Connection Terminal<Ground>

N.F.

LI/LO

Connection Lead<L2-Phase>

NI/NO
EI, E2

Controller Circuit Board

Switch<Pump Down>
Connector<Emergency Operation>

Switch<Function Setup>

SW8
SWP

CN31

C.B.

DS2, DS3

Power Module

IPM

SYMBOL

[LEGEND]

NAME SYMBOL NAME SYMBOL NAME

Connection Terminal<L1/L2-Phase>
Connection Terminal<DC Voltage>

TABS/T
TABP1/P2

Connection Terminal<DC Voltage>

TABN1/N2

Switch

SW9

Fuse<T6.3AL250V>
Switch<

Forced Defrost, Defect History Record

Reset, Refrigerant Address>

Switch<Model Select>

F1~F4
SW1

SW6

Switch<Function Setup>

SW7

LED1,LED2

LED<Operation Inspection Indicators>

CNM
CNMNT
CNVMNT
CNDM

Connector<A-Control Service Inspection Kit>
Connector<Connected to Optional M-NET Adapter Board>
Connector<Connected to Optional M-NET Adapter Board>
Connector< Connection for Option (Contact Input)>

X51,X52,X55

Relay

CY1, CY2

Capacitor

Switch<Test Operation>
Switch<Function Switch>

SW4
SW5

123456

OFF

ON

PUZ-A30N

PUZ-A36N

MODEL SW6

w

1 MODEL SELECT

SW5-5.6

123456

OFF

ON

123456

OFF

ON

PUY-A30N

PUY-A36N

123456

78

78

78

78

OFF

ON

123456

OFF

ON

123456

OFF

ON

123456

OFF

ON

123456

OFF

ON

w

2

w

2. SW5-1 to 4 : Function switch

Connector<Connection for Option>

SS

w

Use copper supply wires.

C. B.

CNF1

(WHT)

MF1

MS
3~

7

1

TRANS

CNDC
(PNK)

3

2

1

TH7/6
(RED)

63H

(YLW)

TH3

(WHT)

TH4

(WHT)

TH7TH6 TH3 TH4

412121

31

t°t°t°t

°

63H

LEV-A

(WHT)

LEV-A

M

LED1

LED2

61

CNVMNT

(WHT)

31

CNDM

(WHT)

CN51

(WHT)

WHT

WHT

WHT

WHT

3151

CNMNT

(WHT)

CNM

(WHT)

51

3

5

SW7

SW6SW1

SW9

CN31

1

w1w1

SW5SW8SW4SWP

14

X51

CNS

(WHT)

CNAC
(WHT)

SS

(WHT)

21S4
(GRN)

X52

F1

F2

F4

F3

21

43

21S4

31

13

SV2

(BLU)

X55

SV

13 13

CN4

(WHT)

12

2

CN52C

(RED)

221

CN2

(WHT)

71

7

CN5

(WHT)

31

LED2

SW1

SW11

SW12

LED3
LED4

TB7

LED1

LED5

2
1

CND

(WHT)

CN2M

(WHT)

M-NET SUBSTRATE

M-NET

ABS

When M-NET adapter is connected

5

3

5

1

PUZ only

P. B .

2

1
3

7

1

1
2
1
2
1
2

7

6

2
2

CNDC

(PNK)

DS2

DS3

TABN

TABP

IPM

U

TABP2

TABV

TABW

TABN2

TABN1

TABS

TABP1

TABT

TABU

MS

3~

UVW

MC

CN2

(WHT)

4

1
CNAF

(WHT)

CN4

(WHT)

CN5

(RED)

CN3

(WHT)

TH8

t

°

DCL

ACTM

L1

LO

52C

NO

LI NI

CN5

(RED)

L2

N2

Io

N1

P

4

16

CNAC2

(RED)

CN52C

(BLK)

CNAC1

(WHT)

2

2

1

3

E2

EI

U

U

1

2

1
2

3

1

N. F.

POWER SUPPLY
208 / 230V 60Hz

INDOOR
UNIT

TB1

S1 S2 S3

RED

BLU

BLU

BLK

BLK

GRN

ORN

YLW

BRN

L1 L2 GR

WHT

REDRED

RED

RED

BLU

WHT

RED

BLK

BLK

CY2

CY1

PUZ-A30/36NHA2 PUZ-A30/36NHA2-BS PUY-A30/36NHA2 PUY-A30/36NHA2-BS

18

TB1
MC
MF1,MF2
21S4
63H
63L
TH3
TH4
TH6
TH7
TH8
LEV-A
DCL

Terminal Block<Power Supply, Indoor/Outdoor >
Motor for Compressor
Fan Motor

Solenoid Valve (Four-Way Valve)

High Pressure Switch
Low Pressure Switch

Thermistor<Outdoor Pipe>

Thermistor<Discharge>
Thermistor<Outdoor 2-Phase Pipe>
Thermistor<Outdoor>
Thermistor<Heatsink>
Electronic Expansion Valve

Reactor

ACTM

Active Filter Module

CB

Main Smoothing Capacitor

Power Circuit Board
Connection Terminal<U/V/W-Phase>

Diode Bridge

P.B.

TABU/V/W

Noise Filter Circuit Board
Connection Lead<L1-Phase>

Connection Terminal<Ground>

N.F.

LI/LO

Connection Lead<L2-Phase>

NI/NO

52C Relay

52C

EI, E2

Controller Circuit Board

Switch<Pump Down>
Connector<Emergency Operation>

SWP
CN31

C.B.

DS2, DS3

Power Module

IPM

SYMBOL

[LEGEND]

NAME SYMBOL NAME SYMBOL NAME

Connection Terminal<L1/L2-Phase>

TABS/T

Connection Terminal<DC Voltage>

TABP1/P2/P

Connection Terminal<DC Voltage>

TABN1/N2/N

Switch<Function Setup>

SW8

Switch

SW9

Fuse<

T6.3AL250V>

Switch<

Forced Defrost, Defect History Record

Reset, Refrigerant Address>

Switch<Function Switch>
Switch<Model Select>

F1~F4
SW1

SW5

SW6

Switch<Function Setup>

SW7

LED1,LED2

LED<Operation Inspection Indicators>

CNM
CNMNT
CNVMNT
CNDM

Connector<A-Control Service Inspection Kit>
Connector<Connected to Optional M-NET Adapter Board>
Connector<Connected to Optional M-NET Adapter Board>
Connector< Connection for Option (Contact Input)>

X51,X52,X55

Relay

SYMBOL

M-NET ADAPTER

NAME
TB7
CN5
CND
CN2M
SW1
SW11
SW12
LED1
LED2
LED3
LED4
LED5

Terminal Block<M-net connection>
Connector<Transmission>
Connector<Power Supply>
Connector<M-NET communication>
Switch<Status of communication>
Switch<Address setting : 1st digit>
Switch<Address setting : 2nd digit>
LED<Power Supply : DC5V>
LED<Connection to Outdoor Unit>
LED<Transmission : Sending>
LED<Transmission : Recelving>
LED<Power Supply : DC12V>

wUse copper supply wires.

CY1, CY2 Capacitor

Switch<Test Operation>

SW4

123456

OFF

ON

PUZ-A42N

MODEL SW6

w1 MODEL SELECT

SW5-5.6

123456

OFF

ON

PUY-A42N

7878123456

OFF

ON

123456

OFF

ON

w2

w2. SW5-1 to 4 : Function switch

Connector<Connection for Option>

SS

C. B.

CNF1
(WHT)

MF1

MS
3~

7

1

CNF2
(WHT)

MF2

MS
3~

7

1

TRANS

CNDC
(PNK)

3

2

1

TH7/6
(RED)

63L

(RED)

TH3

(WHT)

TH4

(WHT)

TH7TH6 TH3 TH4

412121

31

t° t° t° t°

63L

63H

(YLW)

31

63H

LEV-A
(WHT)

LEV-A

M

LED1

LED2

61

CNVMNT

(WHT)

31

CNDM

(WHT)

CN51

(WHT)

WHT

WHT

WHT

WHT

3151

CNMNT

(WHT)

CNM

(WHT)

51

3

5

SW7

SW6SW1

SW9

CN31

1

w1w1

SW5SW8SW4SWP

14

X51

CNS

(WHT)

CNAC

(WHT)

SS

(WHT)

21S4

(GRN)

X52

F1

F2

F4

F3
21
43

21S4

31

13

SV2

(BLU)

X55

13 13

CN4

(WHT)

12

2

CN52C

(RED)

221

CN2

(WHT)

71

7

CN5

(WHT)

31

LED2

SW1

SW11

SW12

LED3
LED4

TB7

LED1

LED5

2
1

CND

(WHT)

CN2M

(WHT)

M-NET SUBSTRATE

M-NET

ABS

When M-NET adapter is connected

5

3

5

1

w2 PUZ only

P. B.

2

1
3

7

1

1
2

1
2
1
2

7

6

2
2

CNDC
(PNK)

DS2

DS3

TABN
TABP

IPM

U

TABP2

TABV

TABW

TABN2

TABN1

TABS

TABP1

TABT

TABU

M
3~

UVW

MC

CB

CN2

(WHT)

4

1

CNAF
(WHT)

CN4

(WHT)

CN5

(RED)

CN3

(WHT)

TH8
t

°

DCL

ACTM

L1

LO

52C

NO

LI NI

CN5

(RED)

L2

N2

Io

N1

P

4

16

CNAC2

(RED)

CN52C

(BLK)

CNAC1

(WHT)

2

2

1

3

E2

EI

U

U

1

2

1
2

3

1

N. F.

POWER SUPPLY
208 / 230V 60Hz

INDOOR
UNIT

TB1

S1 S2 S3

RED

BLU

BLU

BLK

GRN

ORN

YLW

BRN

L1 L2 GR

WHT

REDRED

RED

RED

BLU

WHT

RED

BLK

BLK

BLK

RED

WHT

CY2

CY1

PUZ-A42NHA2 PUZ-A42NHA2-BS PUY-A42NHA2 PUY-A42NHA2-BS

19

8

8-1. INDOOR UNIT POWER SUPPLIED FROM OUTDOOR UNIT (A-control application)

The following connection patterns are available.
The outdoor unit power supply patterns vary on models.

1:1 System Simultaneous twin system

A Outdoor unit power supply
B Wiring circuit breaker or isolating switch
C Outdoor unit
D Indoor unit/outdoor unit connecting cords
E Remote controller
F Indoor unit
G Indoor unit earth

S1

S2

L1
L2

GR

1
2

S1
S2
S3

S3

S1
S2

L1
L2

GR

1
2

S1
S2
S3

1
2

S1
S2
S3

S3

Warning:
In case of A-control wiring, there is high v oltage potential on the S3 terminal caused by electrical circuit design that has no electrical insulation between po wer line
and communication signal line. Therefore, please turn off the main power supply when servicing. And do not touch the S1, S2, S3 terminals when the power is
energized. If isolator should be used between indoor unit and outdoor unit, please use 3-pole type.

* Affix a label A that is included with the manuals near each wiring diagram for the indoor and outdoor units.

Indoor unit model

PLA-A12, 18, 24, 30

PCA, PKA

PLA-A36, 42

1A 2A

15A 15A

––

ACB

D

E

ACB

D

E

FFF

GG G

Indoor unit power supply
Minimum circuit ampacity
Maximum rating of overcurrent protective device

*1. Max. 50 m, 165 ft
*2. The 10 m, 30 ft wire is attached in the remote controller accessory. Max. 1500 ft
*3. The figures are NOT always against the ground.
S3 terminal has DC 24 V against S2 terminal. However between S3 and S1, these terminals are NOT electrically insulated by the transformer or other device.

1.Wiring size must comply with the applicable local and national code.

2.Use copper supply wires.

3.Use wires rated 600V or more for the power supply cables and the indoor/outdoor unit connecting cables.

4.Install an earth longer than other cables.

Notes:

Outdoor unit model
Outdoor unit power supply
Breaker size
Minimum circuit ampacity
Maximum rating of overcurrent protective device

Outdoor unit power supply
Outdoor unit power supply earth
Indoor unit-Outdoor unit *1
Indoor unit earth *1
Remote controller-Indoor unit *2
Outdoor unit L1-L2 *3
Indoor unit-Outdoor unit S1-S2 *3
Indoor unit-Outdoor unit S2-S3 *3
Remote controller-Indoor unit *3

A12 A18 A24 A30 A36 A42

Single, 208/230 V, 60 Hz Single, 208/230 V, 60 Hz Single, 208/230 V, 60 Hz Single, 208/230 V, 60 Hz Single, 208/230 V, 60 Hz Single, 208/230 V, 60 Hz

15A 15A 25A 30A 30A 30A
13A 13A 18A 25A 25A 26A

15A 20A 30A 40A 40A 40A
2 o Min. AWG 14 2 o Min. AWG 14 2 o Min. AWG 12 2 o Min. AWG 10 2 o Min. AWG 10 2 o Min. AWG 10
1 o Min. AWG 14 1 o Min. AWG 14 1 o Min. AWG 12 1 o Min. AWG 10 1 o Min. AWG 10 1 o Min. AWG 10

3 o AWG 16 (polar) 3 o AWG 16 (polar) 3 o AWG 16 (polar) 3 o AWG 16 (polar) 3 o AWG 16 (polar) 3 o AWG 16 (polar)

1 o Min. AWG 16 1 o Min. AWG 16 1 o Min. AWG 16 1 o Min. AWG 16 1 o Min. AWG 16 1 o Min. AWG 16

2 o AWG 22 (Non-polar) 2 o AWG 22 (Non-polar) 2 o AWG 22 (Non-polar) 2 o AWG 22 (Non-polar) 2 o AWG 22 (Non-polar) 2 o AWG 22 (Non-polar)

AC 208/230 V AC 208/230 V AC 208/230 V AC 208/230 V AC 208/230 V AC 208/230 V
AC 208/230 V AC 208/230 V AC 208/230 V AC 208/230 V AC 208/230 V AC 208/230 V

DC 24 V DC 24 V DC 24 V DC 24 V DC 24 V DC 24 V
DC 12 V DC 12 V DC 12 V DC 12 V DC 12 V DC 12 V

Wiring

Wire No. o

size

Circuit

rating

S1

S2

S3

S1

S2

S3

A-Control

Outdoor Unit

3 poles isolator

230V

Single phase

Isolator

A-Control

Indoor Unit

WIRING SPECIFICATIONS

20

8-2. SEPARATE INDOOR UNIT/OUTDOOR UNIT POWER SUPPLIES

The following connection patterns are available.
The outdoor unit power supply patterns vary on models.

1:1 System

S1
S2

L1
L2

GR

GR

1
2

L1
L2

S1
S2
S3

S3

* Affix a label B that is included with the manuals near each wiring diagram for the indoor and outdoor units.

* The optional indoor power supply terminal kit is required.

Outdoor unit power supply
Wiring circuit breaker or isolating switch
Outdoor unit
Indoor unit/outdoor unit connecting cords
Remote controller
Indoor unit
Indoor unit power supply

Simultaneous twin system

If the indoor and outdoor units have separate power supplies, refer to the table below.
Change the indoor unit electrical box wiring refering to the figure in the right and
the DIP switch settings of the outdoor unit control board.

*Affix a label B that is included with the manuals near each wiring diagram for the indoor and outdoor units.

Outdoor unit power supply
Wiring circuit breaker or isolating switch
Outdoor unit
Indoor unit/outdoor unit connecting cords
Remote controller
Indoor unit
Indoor unit power supply

Indoor unit electrical box connector con­nection change

Label affixed near each wiring diagram
for the indoor and outdoor units

Outdoor unit DIP switch settings (when
using separate indoor unit/outdoor unit
power supplies only)

Indoor unit specifications

Required

Required

*1. Max. 50 m, 165 ft
*2. The 10 m, 30 ft wire is attached in the remote controller accessory. Max. 500 m, 1500 ft
*3. The figures are NOT always against the ground.

Notes: 1. Wiring size must comply with the applicable local and national code.

2. Use copper supply wires.

3. Use wires rated 300V or more for the power supply cables.

4. Install an earth longer than other cables.

Indoor unit model
Indoor unit power supply

Minimum circuit ampacity
Maximum rating of overcurrent protective device

Indoor unit power supply
Indoor unit power supply earth
Indoor unit-Outdoor unit *1
Indoor unit earth
Remote controller-Indoor unit *2
Indoor unit L1-L2 *3
Indoor unit-Outdoor unit S1-S2 *3
Indoor unit-Outdoor unit S2-S3 *3
Remote controller-Indoor unit *3

PLA-A12, 18, 24, 30

PKA, PCA

PLA-A36, 42

Single 208/230 V, 60 Hz Single 208/230 V, 60 Hz

1 A 2A

15A 15A

2

o Min. AWG16 2 o Min. AWG16

1

o Min. AWG16 1 o Min. AWG16

2

o AWG22 (polar) 2 o AWG22 (polar)

2

o AWG22 (Non-polar) 2 o AWG22 (Non-polar)

AC 208/230 V AC 208/230 V

DC24 V DC24 V
DC12 V DC12 V

Circuit

rating

If the indoor and
outdoor units have
separate power
supplies, change the
connections of the
connectors as shown
in the following
figure.

Connectors

Indoor unit

control board

Separate indoor unit/outdoor unit power
supplies

Indoor unit

control board

* There are three types of labels (labels A, B, and C). Affix the appropriate labels to

the units according to the wiring method.

S1
S2

L1

GR

L2

1
2

L1
L2

GR GR
S1

S2
S3

1
2

L1
L2

S1
S2
S3

S3

S1
S2
S3

L1
L2
GR

BLUE

BLUE

YELLOW

YELLOW

CND/CN01

S1
S2
S3

L1
L2
GR

YELLOW

BLUE

BLUE

YELLOW

Wiring

Wire No.

o

size

––

––

A
B
C
D
E
F
G

Option

H

Option

H

A
B
C
D
E
F
G

A

H

H

C

BB

D

E

F

G

A

C

BB

D

E

FF

G

CND/CN01

Connectors (connections when
shipped from the factory are
for indoor unit power supplied
from outdoor unit)

Indoor unit power supplied
from outdoor unit(When
shipped from factory)

ON
OFF 1 2

3

(SW8)

21

w The max. cable length may vary depending on the condition of installation, humidity or materials, etc.

Indoor unit-Outdoor unit

Outdoor power supply

Max. 45m, 147ft

3 o AWG15(polar)

Max. 50m, 164ft

3 o AWG13(polar)

Max. 80m, 262ft

3 o AWG13(polar) and S3 separated

Wire No. o Size

Be sure to connect the indoor-outdoor connecting cables directly to the units (no intermediate connections).
Intermediate connections can lead to communication errors if water enters the cables and causes insufficient
insulation to ground or a poor electrical contact at the intermediate connection point.

Indoor unit-Outdoor unit

Indoor/Outdoor separate
power supply

Max. 120m, 393ft

2 o Min. AWG22

Wire No. o Size

w The optional indoor power supply terminal kit is necessary.

8-3. INDOOR - OUTDOOR CONNECTING CABLE

22

8-4. M-NET WIRING METHOD

Group
remote
controller

Refrigerant
address 00

M-NET
address 01

A-control
remote
controller

A-control
remote
controller

A-control
remote
controller

Refrigerant
address 00

M-NET
address 02

Refrigerant
address 00

M-NET
address 03

Power
supply
unit for
transmission
wire

Central
remote
controller

M-NET transmission wire

✕ Bad example (Multi spot grounding of shield wire)

Good example 1 (Single spot grounding of shield wire)

Power
supply
appliance

M-NET type
outdoor unit

Central
remote
controller

Power
supply
appliance

M-NET type
outdoor unit

M-NET type
outdoor unit

M-NET type
outdoor unit

M-NET transmission wire

M-NET type
outdoor unit

M-NET type
outdoor unit

Central
remote
controller

Power
supply
appliance

M-NET type
outdoor unit

M-NET transmission wire

M-NET type
outdoor unit

M-NET type
outdoor unit

Good example 2 (Single spot grounding of shield wire)

(Points to notice)
(1) Outside the unit, transmission wires should stay away from electric wires in order to prevent electromagnetic noise from

making an influence on the signal communication. Place them at intervals of more than 5cm. Do not put them in the same
conduit tube.

(2) Terminal block (TB7) for transmission wires should never be connected to 208/230V power supply. If it is connected,

electronic parts on M-NET P.C. board may be burnt out.

(3) Use 2-core x 1.25mm2[AWG16] shield wire (CVVS, CPEVS) for the transmission wire. Transmission signals may not be

sent or received normally if different types of transmission wires are put together in the same multi-conductor cable. Never
do this because this may cause a malfunction.

It would be ok if M-NET wire (non-polar, 2-cores) is arranged in addition to the wiring for A-control.

(4) Ground only one of any appliances through M-NET transmission wire (shield wire). Communication error may occur due to

the influence of electromagnetic noise.

If there are more than 2 grounding spots on the shield wire, noise may enter into the shield wire because the ground wire
and shield wire form one circuit and the electric potential difference occurs due to the impedance difference among ground­ing spots. In case of single spot grounding, noise does not enter into the shield wire because the ground wire and shield
wire do not form one circuit.

To avoid communication errors caused by noise, make sure to observe the single spot grounding method described in the
installation manual.

“Ed” error will appear on the LED display of outdoor unit.
“0403” error will appear on the central-control remote controller.

23

1

2

3

4

5

6

7

8

9

0

1

2

3

4

5

6

7

8

9

0

1

2

3

4

5

6

7

8

9

0

1

2

3

4

5

6

7

8

9

0

1

2

3

4

5

6

7

8

9

0

1

2

3

4

5

6

7

8

9

0

12

~

50

M-NET Address No.

<Setting example>

Switching

setting

SW11
ones
digit

SW12
tens
digit

OFF

ON

1

2

3

4

5

6

1

2

3

4

5

6

1

2

3

4

5

6

1

2

3

4

5

6

1

2

3

4

5

6

1

2

3

4

5

6

1

2

3

4

5

6

1

2

3

4

5

6

1

2

3

4

5

6

1

2

3

4

5

6

1

2

3

4

5

6

1

2

3

4

5

6

1

2

3

4

5

6

1

2

3

4

5

6

1

2

3

4

5

6

1

2

3

4

5

6

0

Refrigerant
address

OFF

ON

8

OFF

ON

1

OFF

ON

9

OFF

ON

10

OFF

ON

11

OFF

ON

12

OFF

ON

13

OFF

ON

14

OFF

ON

15

OFF

ON

2

OFF

ON

3

OFF

ON

4

OFF

ON

5

OFF

ON

6

OFF

ON

7

System
controller

A-control
remote
controller

Group A Group B Group C

A-control
remote
controller

TB5

A-control
remote
controller

Refrigerant
address 00

M-NET
address 01

Refrigerant
address 00

M-NET
address 02

Refrigerant
address 01

M-NET
address 03

Refrigerant
address 00

M-NET
address 04

Power
supply
unit for
transmission
wire

A-control
remote
controller

A-control
remote
controller

TB5

Group A Group B

Refrigerant
address 00

M-NET
address 01

Refrigerant
address 01

M-NET
address 02

Refrigerant
address 00

M-NET
address 04

Refrigerant
address 01

M-NET
address 03

Refrigerant
address 02

M-NET
address 05

System
controller

Power
supply
unit for
transmission
wire

● M-NET wiring

(1) Use 2-core x 1.25mm

2

[AWG16] shield wire for electric wires.

(Excluding the case connecting to system controller.)

(2) Connect the wire to the M-NET terminal block. Connect one core of the

transmission wire (non-polar) to Aterminal and the other to B. Peel the
shield wire, twist the shield part to a string and connect it to S terminal.

(3) In the system which several outdoor units are being connected, the terminal

(A, B, S) on M-NET terminal block should be individually wired to the other

M-NET
terminal
block

ABS

Transmission

wire

Ground
wire

Shield
part

outdoor unit’s terminal, i.e. Ato A, B to B and S to S. In this case, choose one of those outdoor units and drive a screw
to fix an ground wire on the plate as shown on the right figure.

8-4-1. M-NET address setting

In A-control models, M-NET address and refrigerant address should be set only for the outdoor unit. Similar to CITY MULTI
series, there is no need to set the address of outdoor unit and remote controller. To construct a central control system, the
setting of M-NET address should be conducted only upon the outdoor unit. The setting range should be 1 to 50 (the same as
that of the indoor unit in CITY MULTI system), and the address number should be consecutively set in a same group.

Address number can be set by using rotary switches
(SW11 for ones digit and SW12 for tens digit), which
is located on the M-NET board of outdoor unit.
(Initial setting: all addresses are set to “0”.)

8-4-2. Refrigerant address setting

In case of multiple grouping system (multiple refrigerant circuits in one group), indoor units should be connected by remote
controller wiring (TB5) and the refrigerant address needs to be set. Leave the refrigerant addresses to “00” if the group set­ting is not conducted. Set the refrigerant address by using DIP SW1-3 to -6 on the outdoor controller board. [Initial setting: all
switches are OFF. (All refrigerant addresses are “00”.)]

8-4-3. Regulations in address settings

In case of multiple grouping system, M-NET and refrigerant address settings should be done as explained in the above sec­tion. Set the lowest number in the group for the outdoor unit whose refrigerant address is “00” as its M-NET address.

w Refrigerant addresses can be overlapped if they are in the different group.

w In group B, M-NET address of the outdoor unit whose refrigerant address is “00” is not set to the minimum in the group. As

“03” is right for this situation, the setting is wrong. Taking group A as a good sample, set the minimum M-NET address in
the group for the outdoor unit whose refrigerant address is “00”.

24

9

Outdoor heat exchanger

Thermistor
(TH3)

Thermistor
(TH6)

Distributor

Service
port
(check)

Accumulator

Compressor

Refrigerant GAS pipe

15.88A({5/8)

Refrigerant LIQUID pipe

9.52A({3/8)
Stop valve
(with service port)

4-way valve

Service
port
(check)

High pressure
protect switch

Refrigerant flow in cooling
Refrigerant flow in heating

Linear expansion valve

Thermistor
(TH4)

Muffler

Ball valve

Bypass valve

(#50)

Strainer

(#100)

Strainer

(#100)

Strainer

Accumulator

Stop valve
(with service port)

Compressor

Refrigerant GAS pipe

12.7A({1/2)

Refrigerant LIQUID pipe

6.35A({1/4)
Stop valve

4-way valve

Service
port(check)

High pressure
protect switch

Outdoor heat exchanger

Thermistor
(TH3)

Thermistor
(TH6)

Distributor

Muffler

Thermistor(TH4)

Linear expansion valve

Refrigerant flow in cooling
Refrigerant flow in heating

(#50)

Strainer

(#100)

Strainer

(#100)

Strainer

Service
port
(check)

Accumulator

Compressor

Refrigerant GAS pipe

15.88A({5/8)

Refrigerant LIQUID pipe

9.52A({3/8)

4-way
valve

Service
port
(check)

High pressure protect switch

Linear expansion valve

Muffler

Thermistor
(TH4)

Refrigerant flow in cooling
Refrigerant flow in heating

Ball valve

(#50)

Strainer

Strainer

(#100)

Strainer

(#100)

Strainer

(#100)

Low pressure protect
switch

Stop valve

(with service port)

Outdoor heat exchanger

Thermistor
(TH3)

Thermistor
(TH6)

Distributor

REFRIGERANT SYSTEM DIAGRAM

PUZ-A18NHA2 PUZ-A18NHA2-BS

PUZ-A24/30/36NHA2 PUZ-A24/30/36NHA2-BS

Unit : mm(inch)

<4-way valve solenoid coil>

Heating : ON
Cooling : OFF

PUZ-A42NHA2 PUZ-A42NHA2-BS

25

Outdoor heat exchanger

Thermistor
(TH3)

Thermistor
(TH6)

Distributor

Service
port
(check)

Accumulator

Compressor

Refrigerant GAS pipe

15.88A({5/8)

Refrigerant LIQUID pipe

9.52A({3/8)

Stop valve
(with service port)

Service
port
(check)

High pressure
protect switch

Refrigerant flow in cooling

Linear expansion valve

Thermistor
(TH4)

Ball valve

(#50)

Strainer

(#100)

Strainer

(#100)

Strainer

Bypass valve

PUY-A12/18NHA2 PUY-A12/18NHA2-BS

Outdoor heat exchanger

Thermistor
(TH3)

Thermistor
(TH6)

Distributor

Service port
(Check)

Accumulator

Compressor

Refrigerant GAS pipe

12.7A({1/2)

Refrigerant LIQUID pipe

6.35A({1/4)
Stop valve

High pressure
protect switch

Thermistor (TH4)

Linear expansion valve

Refrigerant flow in cooling

Stop valve
(with service port)

(#50)

Strainer

(#100)

Strainer

(#100)

Strainer

Service
port
(check)

Accumulator

Compressor

Refrigerant GAS pipe

15.88A({5/8)

Refrigerant LIQUID pipe

9.52A({3/8)

Service
port
(check)

High pressure
protect switch

Thermistor
(TH4)

Refrigerant flow in cooling

Stop valve
(with service port)

Linear expansion valve

Ball valve

(#50)

Strainer

Strainer

(#100)

Strainer

(#100)

Strainer

(#100)

Low pressure protect
switch

Outdoor heat exchanger

Thermistor
(TH3)

Thermistor
(TH6)

Distributor

PUY-A24/30/36NHA2 PUY-A24/30/36NHA2-BS

Unit : mm(inch)

PUY-A42NHA2 PUY-A42NHA2-BS

26

OFF

12

ON

<SW4>

AB

CD

A Stop C operation
B Cooling D Heating

(PUZ only)

1. Refrigerant recovering (pump down)

Perform the following procedures to recover the refrigerant when moving the indoor unit or the outdoor unit.
1Turn on the power supply (circuit breaker).

wWhen power is supplied, make sure that “CENTRALLY CONTROLLED” is not displayed on the remote controller. If“CEN-

TRALLY CONTROLLED” is displayed, the refrigerant collecting (pump down) cannot be completed normally.

2After the liquid stop valve is closed, set the SWP switch on the control board of the outdoor unit to ON. The compressor

(outdoor unit) and ventilators (indoor and outdoor units) start operating and refrigerant recovering operation begins. LED1
and LED2 on the control board of the outdoor unit are lit.
wSet the SWP switch (push-button type) to ON in order to perform refrigerant recovering operation only when the unit is

stopped. However, refrigerant recovering operation cannot be performed until compressor stops even if the unit is stopped.
Wait 3 minutes until compressor stops and set the SWP switch to ON again.

3Because the unit automatically stops in about 2 to 3 minutes after the refrigerant recovering operation (LED1 is not lit and

LED2 is lit), be sure to quickly close the gas stop valve.

wIn case the outdoor unit is stopped when LED1 is lit and LED2 is not lit, open the liquid stop valve completely, and then

repeat step 2 3 minutes later.

wIf the refrigerant recovering operation has been completed normally (LED1 is not lit and LED2 is lit), the unit will remain

stopped until the power supply is turned off.

4Turn off the power supply (circuit breaker.)

2. Start and finish of test run

• Operation from the indoor unit

Execute the test run using the installation manual for the indoor unit.

• Operation from the outdoor unit
By using the DIP switch SW4 on the control board of outdoor unit, test run can be started and finished, and its operation
mode (cooling/heating) can be set up.

1Set the operation mode (cooling/heating) using SW4-2.
2Turn on SW4-1 to start test run with the operation mode set by SW4-2.
3Turn off SW4-1 to finish the test run.

• There may be a faint knocking sound around the machine room after power is supplied, but this is
no problem with product because the linear expansion valve is just moving to adjust opening pulse.

• There may be a knocking sound around the machine room for several seconds after compressor
starts operating. But this is not a problem with product because the check valve itself generates
the sound because pressure difference is small in the refrigerant circuit.

Note:
The operation mode cannot be changed by SW4-2 during test run. (To change test run mode, stop the unit by SW4-1,
change the operation mode and restart the test run by SW4-1.)

27

10 TROUBLESHOOTING

Unit conditions at service

Error code

Actions to be taken for service (summary)

The trouble is reoccurring.

Displayed

Not displayed

Judge what is wrong and take a corrective action according
to “10-4. Self-diagnosis action table”.

Conduct trouble shooting and ascertain the cause of the
trouble according to “10-5. Troubleshooting by inferior
phenomena”.

The trouble is not reoccurring.

Logged

Not logged

1Consider the temporary defects such as the work of
protection devices in the refrigerant circuit including
compressor, poor connection of wiring, noise and etc.
Re-check the symptom, and check the installation
environment, refrigerant amount, weather when the

trouble occurred, matters related to wiring and etc.
2Reset error code logs and restart the unit after finishing
service.
3There is no abnormality concerning of parts such as
electrical component, controller board, remote controller
and etc.

1Re-check the abnormal symptom.
2Conduct trouble shooting and ascertain the cause of the

trouble

according to “10-5. Troubleshooting

by inferior
phenomena”.
3Continue to operate unit for the time being if the cause
is not ascertained.
4There is no abnormality concerning of parts such as
electrical component, controller board, remote controller
and etc.

10-1. TROUBLESHOOTING

<Error code display by self-diagnosis and actions to be taken for service (summary)>

Present and past error codes are logged and displayed on the wired remote controller and control board of outdoor unit.
Actions to be taken for service, which depends on whether or not the trouble is reoccurring at service, are summarized in the
table below. Check the contents below before investigating details.

10-2. CHECK POINT UNDER TEST RUN

(1) Before test run

• After installation of indoor and outdoor units, piping work and electric wiring work, re-check that there is no refrigerant leak-

age, loosened connections and incorrect polarity.

• Measure impedance between the ground and the power supply terminal block (L1, L2) on the outdoor unit by 500V Megger
and check that it is 1.0M" or over.

wDon’t use 500V Megger to indoor/outdoor connecting wire terminal block (S1, S2, S3) and remote controller terminal block

(1, 2). This may cause malfunction.

• Make sure that test run switch (SW4) is set to OFF before turning on power supply.

• Turn on power supply 12 hours before test run in order to protect compressor.

• For specific models which requires higher ceiling settings or auto-recovery feature from power failure, make proper changes

of settings referring to the description of “12. FUNCTION SETTING”.

Make sure to read operation manual before test run. (Especially items to secure safety.)

28

[TEST] button

Pipe (liquid) temperature

Displays the remaining
test run time.

"TEST RUN" and the currently selected
operation mode are displayed altemately.

A

B

C

°F

59

Operating procedures

LCD

Contents of inferior phenomena

P1
P2
P4
P5
P6
P8
P9

Fb

Abnormality of room temperature thermistor
Abnormality of pipe temperature thermistor/Liquid
Abnormality of drain sensor/Float switch connector open
Drain overflow protection is working.
Freezing/overheating protection is working.
Abnormality of pipe temperature
Abnormality of pipe temperature thermistor/Cond./Eva
Abnormality of indoor controller board

LCD

Contents of inferior phenomena

U1~UP

F3~F9
E0~E5

E6~EF

----

FFFF

PA

Malfunction outdoor unit
Malfunction

outdoor unit
Remote controller transmitting error
Indoor/outdoor unit communication error

No error history
No applied unit
Forced compressor stop(due to water leakage abnormality)

LED1

(microcomputer power supply)

LED2

(remote controller)

LED3

(indoor/outdoor communication)

Lits when power is supplied.
Lits when power is supplied for wired remote controller.
The indoor unit should be connected to the outdoor unit with address “0” setting.

Blinks when indoor and outdoor unit are communicating.

1. Turn on the main power supply.

2. Press TEST button twice.

A

3. Press OPERATION SWITCH
button.

4. Press AIR DIRECTION button.

5. Check the outdoor unit fan for
correct running.

B

C

While the room temperature display on the remote
controller is “PLEASE WAIT”, the remote controller is disabled.
Wait until “PLEASE WAIT” disappears before using remote controller.
“PLEASE WAIT” appears for about 2 minutes after power
supply is turned on. w1

The TEST RUN appears on the screen.
Cooling mode:

Heating mode: Check if warm air blows. (It takes a little
while until warm air blows.)

Check for correct motion of auto-vanes.
The outdoor unit features automatic capacity control to

provide optimum fan speeds. Therefore, the fan keeps
running at a low speed to meet the current outside air
condition unless it exceeds its available maximum power.
Then, in actuality, the fan may stop or run in the reverse
direction depending on the outside air, but this does not
mean malfunction.

Check if cool air blows and water is drained.

6. Press the ON/OFF button to reset the test run in progress.

7. Register the contact number.

• In case of test run, the OFF timer will be activated, and the test run will automatically stop after 2 hours.

• The room temperature display section shows the pipe temperature of indoor units during the test run.

• Check that all the indoor units are running properly in case of simultaneous twin operation. Malfunctions may not
be displayed regardless of incorrect wiring.

w1 After turning on the power supply, the system will go into startup mode, “PLEASE WAIT” will blink on the display section of

the room temperature, and lamp(green) of the remote controller will blink.
As to INDOOR BOARD LED, LED1 will be lit up, LED2 will either be lit up in case the address is 0 or turned off in case the
address is not 0. LED3 will blink.
As to OUTDOOR BOARD LED, LED1(green) and LED2(red) will be lit up. (After the startup mode of the system finishes,
LED2(red) will be turned off.)
In case OUTDOOR BOARD LED is digital display, — and — will be displayed alternately every second.

• If one of the above operations doesn’t function correctly, the causes written below should be considered. Find causes from
the symptoms.
The below symptoms are under test run mode. “startup” in the table means the display status of w1 written above.

Symptoms in test run mode

Remote Controller Display

Remote controller displays “PLEASE
WAIT”, and

cannot be operated.

After power is turned on, “PLEASE WAIT”
is displayed for 3 minutes, then error code
is displayed.

No display appears even when remote
controller operation switch is turned on.
(Operation lamp does not light up.)

Display appears but soon disappears
even when remote controller is operated.

w Press the remote controller’s CHECK button twice to perform self-diagnosis. See the table below for the contents of LCD

display.

OUTDOOR BOARD LED Display

< > indicates digital display.

After “startup” is displayed, only
green lights up. <00>
After “startup” is displayed,
green (once) and red (once)
blink alternately. <F1>

After “startup” is displayed,
green (once) and red (twice)
blink alternately. <F3, F5, F9>

After “startup” is displayed,
green (twice) and red (once)

blink alternately. <EA. Eb>
After “startup” is displayed, only

green lights up. <00>
After “startup” is displayed, only

green lights up. <00>

Cause

• After power is turned on, “PLEASE WAIT” is displayed for 2
minutes during

system startup. (Normal)

• Incorrect connection of outdoor terminal block (L1, L2, and
S1, S2, S3.)

• Outdoor unit’s protection device connector is open.

• Incorrect wiring between the indoor and outdoor unit (Polarity
is wrong for S1, S2, S3.)

• Remote controller transmission wire is short.

• There is no outdoor unit of address 0.
(Address is other than 0.)

• Remote controller transmission wire is open.

• After canceling function selection, operation is not possible for
about 30 seconds. (Normal)

See the table below for details of the LED display (LED 1, 2, 3) on the indoor controller board.

29

ON/OFF

TEMP

FAN

VANE

MODE

CHECK

LOUVER

TEST RUN

AUTO STOP

AUTO START

h

min

RESET

SET

CLOCK

TEST

RUN

COOL

7

5

6

2

3,4

Test run [for wireless remote controller]

MODE

MODE

COOL

HEAT

TEST RUN

FAN

VANE

TEST RUN

Measure an impedance between the power supply terminal block on
the outdoor unit and ground with a 500V Megger and check that it is
equal to or greater than 1.0M".

1 Turn on the main power to the unit.
2 Press the button twice continuously.

(Start this operation from the turned off status of remote controller
display.)

and current operation mode are displayed.

3 Press the ( ) button to activate mode, then

check whether cool air is blown out from the unit.

4 Press the ( ) button to activate mode, then

check whether warm air is blown out from the unit.

5 Press the button and check whether strong air is blown out

from the unit.

6 Press the button and check whether the auto vane operates

properly.

7 Press the ON/OFF button to stop the test run.

Note:

• Point the remote controller towards the indoor unit receiver
while following steps

• It is not possible to run in FAN, DRY or AUTO mode.

22

to 77.

30