Mitsubishi Electric PUZ-A18NHA2 User manual

SERVICE MANUAL
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
SPLIT-TYPE, AIR CONDITIONERS
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 ·············25
10. TROUBLESHOOTING ··································28
11. EASY MAINTENANCE FUNCTION··············85
12. FUNCTION SETTING····································88
13.
MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER ············96
14. DISASSEMBLY PROCEDURE ···················106
No.OCH429
R410A
November 2007
[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
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
Outdoor unit
PARTS CATALOG (OCB429)

2
1-1. INDOOR UNIT
Model name Service Ref. Service
Manual No.
PLA-A12/18/24/30/36/42BA PLA-A12/18/24/30/36/42BA 1
OCH420
OCB420
PCA-A24/30/36/42GA PCA-A24/30/36/42GA
2 OC368
PKA-A12/18GA PKA-A12/18GA
2
OC369
PKA-A12/18GAL PKA-A12/18GAL
2
PKA-A24/30/36FA PKA-A24/30/36FA 2
PKA-A24/30/36FAL PKA-A24/30/36FAL 2
1-2. TECHNICAL DATA BOOK
Manual No. OCS13
1REFERENCE MANUAL

3
2SAFETY PRECAUTION
Cautions for units utilizing refrigerant R410A
2-2. CAUTIONS RELATED TO NEW REFRIGERANT
Use new refrigerant pipes.
Make sure that the inside and outside of refrige-
rant 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 refrige-
rant 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 com-
pressor.
Do not use a charging cylinder.
If a charging cylinder is used, the composition of refrigera-
nt 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 deterio-
ration of refrigerant oil etc.
If dirt, dust or moisture enters into refrigerant cycle, that can
cause deterioration of refrigerant oil or malfunction of com-
pressor.
If large amount of mineral oil enters, that can cause deterio-
ration 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.

4
Gravimeter
Unit
[3] Service tools
Use the below service tools as exclusive tools for R410A refrigerant.
No. Tool name Specifications
1Gauge manifold ·Only for R410A
·Use the existing fitting specifications.
·Use high-tension side pressure of 5.3MPa·G or over.
2Charge hose ·Only for R410A
·Use pressure performance of 5.09MPa·G or over.
3Electronic scale
4Gas leak detector ·Use the detector for R134a, R407C or R410A.
5Adaptor for reverse flow check ·Attach on vacuum pump.
6Refrigerant charge base
7Refrigerant cylinder ·Only for R410A ·Top of cylinder (Pink)
·Cylinder with syphon
8Refrigerant recovery equipment
[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.)

5
2-3. 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 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 cop-
per pipe flaring dimensions for R410A below. For 1/2 and 5/8 inch, the dimension B changes.
Use torque wrench corresponding to each dimension.
3Tools for R410A (The following table shows whether conventional tools can be used or not.)
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 thermis-
tor 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 refri-
gerant 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 adop-
ter 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.
Dimension A
Dimension B

6
3 FEATURES
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.
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
PUZ-A18NHA2
PUZ-A18NHA2-BS
PUY-A12/18NHA2
PUY-A12/18NHA2-BS

7
4SPECIFICATIONS
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
Power supply Phase Single
Cycle 60Hz
Voltage 208/230V
MCA A 13 18 25 25 26
MOCP A2030404040
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 kW -
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)oNo. Propeller fan o1 Propeller fan o1 Propeller fan o1 Propeller fan o1 Propeller fan o2
Fan motor output kW 0.040 0.075 0.075 0.075 0.086 + 0.086
Fan motor F.L.A. 0.35 0.75 0.75 0.75 0.40 + 0.40
Airflow m3/min 34 55 55 55 100
CFM 1200 1940 1940 1940 3530
Sound level Cooling dB 46 48 48 48 51
Heating dB 47 50 50 50 55
Protection devices HP switch HP switch HP switch HP switch HP switch
LP switch
Discharge thermo Discharge thermo Discharge thermo Discharge thermo Discharge thermo
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
lbs 99 165 165 165 260
Refrigerant R410A
Charged kg 1.7 2.7 2.7 2.7 4.5
lbs 3 + 12/16 6 6 6 10
Ether (FV50S)
Control Linear expansion valve
Oil Model Ester (MEL56)
Charged L 0.65 0.87 0.87 0.87 1.4
oz 20 28 28 28 45
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
ft Max. 100 Max. 165 Max. 165 Max. 165 Max. 165

8
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 A 13 13 18 25 25 26
MOCP A152030404040
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) oNo. Propeller fan o1 Propeller fan o1 Propeller fan o1 Propeller fan o1 Propeller fan o1 Propeller fan o2
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 m3/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

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
9
5-1. REFILLING REFRIGERANT CHARGE (R410A : oz, kg)
5-2. COMPRESSOR TECHNICAL DATA
5DATA

10
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

11
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 ˚F4130453134293828
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 ˚F80708070807080708070
Intake air temperature WB ˚F67606760676067606760
Discharge air temperature DB ˚F 54 114 57 105 54 114 57 106 55 107
side
Outdoor Intake air temperature DB ˚F95479547954795479547
Intake air temperature WB ˚F75437543754375437543
SHF 0.70 0.78 0.70 0.77 0.71
BF 0.12
–
–
–
–
–
–
–
–
–
–0.10 0.11 0.11 0.15

12
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 ˚F808080808080
Intake air temperature WB ˚F676767676767
55
Discharge air temperature DB ˚F5954575457
side
Outdoor Intake air temperature DB ˚F959595959595
Intake air temperature WB ˚F757575757575
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

13
OUTDOOR UNIT Unit : mm<inch>
PUZ-A18NHA2 PUZ-A18NHA2-BS PUY-A12/18NHA2 PUY-A12/18NHA2-BS
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
6OUTLINES AND DIMENSIONS

14
PUZ-A24/30/36NHA2 PUZ-A24/30/36NHA2-BS Unit : mm<inch>
PUY-A24/30/36NHA2 PUY-A24/30/36NHA2-BS
,
,,,,
,,,,,,
,,,,,
,,,,,,
,,,,,
,,,
,
,,
,,,,
,
,,
,
,,,
,
,,
,,,,
,,,,,
,,,,
,
,,
,,,
,,
,,
,,,
,,,,,
,,,,,,
,,,,,
,,
,
,,,,
,,,,,
,,,,,,
,,,,,
,,,
,,
,,,,
,,,,
,,,
,
,,,
,,,,
,
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

15
PUZ-A42NHA2 PUZ-A42NHA2-BS Unit : mm<inch>
PUY-A42NHA2 PUY-A42NHA2-BS
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

16
TB1
MC
MF1
21S4
63H
TH3
TH4
TH6
TH7
TH8
LEV-A
CY1,CY2
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
Capacitor
ACL 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
Connector<A-Control Service Inspection Kit>
Connector
<Connected to Optional M-NET Adapter Board>
Connector
< Connection for Option (Contact Input)>
C.B.
Converter
PFC
Power Module IPM
Main Smoothing Capacitor CB1~CB3
52C Relay
52C
SYMBOL
[LEGEND] NAME SYMBOL NAME SYMBOL NAME
Connection Terminal<L1/L2-Phase>
R/S
Connector<Connection for Option>
SS
CNMNT
Connector
<Connected to Optional M-NET Adapter Board>
Switch<Model Select>
SW6
Switch
SW9
X51, X52
Relay
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>
LED1,LED2
LED<Operation Inspection Indicators>
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
35
SW7
SW6SW1
SW9
CN31
1
w1w1
SW5SW8SW4 SWP
14
X51
CNS
(WHT)
CNAC
(WHT)
SS
(WHT)
21S4
(GRN)
X52
F1
F2
F4
F3
21
43
21S4
31
13 13
CN4
(WHT)
12
2
CN52C
(RED)
2
2
1
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
LI EI NI
LO NO
E2 E3
N. F.
2
2
1
3
1
1
3
2
12
CN5
(RED)
CNAC1
(WHT) CNAC2
(RED)
CN52C
(BLK)
52C
RED
U
POWER SUPPLY
208 / 230V 60Hz
INDOOR
UNIT
TB1
L1 L2 GR 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
U
V
W
MC
PUZ only
123456
OFF
ON
PUZ-A18N
MODEL SW6
w1 MODEL SELECT SW5
- 5.6
123456
OFF
ON
PUY-A12N
PUY-A18N
123456
78
78
78
OFF
ON
123456
OFF
ON
123456
OFF
ON
123456
OFF
ON
w2
w2. SW5-1 to 4 : Function switch
wUse copper supply wires.
PUZ-A18NHA2 PUZ-A18NHA2-BS PUY-A12/18NHA2 PUY-A12/18NHA2-BS
7WIRING DIAGRAM

17
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
35
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)
2
2
1
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
UU
LI EINI
LO NO
E2 E3
N. F.
2
2
1
3
1
1
3
2
12
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
VTH8
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
U
V
W
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
78
78
123456
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

18
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
21
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
35
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)
2
2
1
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
71
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)
41
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

19
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
78
78
123456
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
21
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
35
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)
2
2
1
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
71
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)
41
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

20
8WIRING SPECIFICATIONS
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
AOutdoor unit power supply
BWiring circuit breaker or isolating switch
COutdoor unit
DIndoor unit/outdoor unit connecting cords
ERemote controller
FIndoor unit
GIndoor 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 voltage potential on the S3 terminal caused by electrical circuit design that has no electrical insulation between power 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
––
A
C
B
D
E
A
C
B
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, 208/230V, 60 Hz Single, 208/230 V, 60 Hz Single, 208/230 V, 60 Hz Single, 208/230 V, 60 Hz Single, 208/230V, 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
2oMin. AWG 14 2 oMin. AWG 14 2 oMin. AWG 12 2 oMin. AWG 10 2 oMin. AWG 10 2 oMin. AWG 10
1oMin. AWG 14 1 oMin. AWG 14 1 oMin. AWG 12 1 oMin. AWG 10 1 oMin. AWG 10 1 oMin. AWG 10
3oAWG 16 (polar) 3 oAWG 16 (polar) 3 oAWG 16 (polar) 3 oAWG 16 (polar) 3 oAWG 16 (polar) 3 oAWG 16 (polar)
1oMin. AWG 16 1 oMin. AWG 16 1 oMin. AWG 16 1 oMin. AWG 16 1 oMin. AWG 16 1 oMin. 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 208/230V AC 208/230 V AC 208/230 V AC 208/230 V AC 208/230V AC 208/230 V
AC 208/230V AC 208/230 V AC 208/230 V AC 208/230V 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