Mitsubishi Electric PUHZ-ZRP35VKA2 User manual

SERVICE MANUAL R410A
PARTS CATALOG (OCB635)
CONTENTS
1. REFERENCE MANUAL····························2
2. SAFETY PRECAUTION····························2
3. FEATURES ············································6
4. SPECIFICATIONS ···································7
5. DATA ····················································8
6. OUTLINES AND DIMENSIONS················ 11
7. WIRING DIAGRAM································ 13
8. WIRING SPECIFICATIONS····················· 15
9. REFRIGERANT SYSTEM DIAGRAM ·········· 20
10. TROUBLESHOOTING···························· 22
11. FUNCTION SETTING ····························· 77
12. MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER ···86
13. EASY MAINTENANCE FUNCTION··········· 95
14. DISASSEMBLY PROCEDURE················· 97
PUHZ-ZRP35VKA2
PUHZ-ZRP50VKA2
Note:
•This manual describes
service data of the out-
door units only.
OCH635 is void.
Revision:
•Connectable indoor units
have been added in
REVISED EDITION-A.
No. OCH635
REVISED EDITION-A
July 2020
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
Outdoor unit
[Model Name] [Service Ref.]
PUHZ-ZRP35VKA2 PUHZ-ZRP35VKA2
PUHZ-ZRP35VKA2-ER
PUHZ-ZRP35VKA2-ET
PUHZ-ZRP50VKA2 PUHZ-ZRP50VKA2
PUHZ-ZRP50VKA2-ER
PUHZ-ZRP50VKA2-ET
PUHZ-ZRP60VHA2 PUHZ-ZRP60VHA2
PUHZ-ZRP60VHA2-ER
PUHZ-ZRP60VHA2-ET
PUHZ-ZRP71VHA2 PUHZ-ZRP71VHA2
PUHZ-ZRP71VHA2-ER
PUHZ-ZRP71VHA2-ET

2
OCH635A
2-1. ALWAYS OBSERVE FOR SAFETY
Before obtaining access to terminal, all supply circuits must be disconnected.
INDOOR UNIT SERVICE MANUAL
2SAFETY PRECAUTION
2-2. CAUTIONS RELATED TO NEW REFRIGERANT
Cautions for units utilizing refrigerant R410A
Preparation before the repair service.
• Prepare the proper tools.
• Prepare the proper protectors.
• Provide adequate ventilation.
• After stopping the operation of the air conditioner, turn off
the power-supply beaker.
• Discharge the condenser before the work involving the
electric parts.
Precautions during the repair service.
• Do not perform the work involving the electric parts
with wet hands.
• Do not pour water into the electric parts.
• Do not touch the refrigerant.
• Do not touch the hot or cold areas in the refrigerating cycle.
• When the repair or the inspection of the circuit needs to be
done without turning off the power, exercise great caution
not to touch the live parts.
Use new refrigerant pipes.
In case of using the existing pipes for R22, be careful with
the following.
· 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.
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.
1REFERENCE MANUAL
Model Name Service Ref. Service
Manual No.
PLA-ZP35/50/60/71EA PLA-ZP35/50/60/71EA.UK OCH625
OCB625
PLA-RP35/50/60/71EA PLA-RP35/50/60/71EA.UK OCH626
OCB626
PCA-RP35/50/60/71KAQ PCA-RP35KAQR2 PCA-RP35KAQR2-ER
PCA-RP50/60/71KAQR1
OCH491
OCB491
PCA-RP71HAQ PCA-RP71HAQ
PCA-RP71HAQ-ER OCH492 OCB492
PKA-RP35/50HAL PKA-RP35/50HALR1
PKA-RP35/50HALR1-ER OCH453 OCB453
PKA-RP60/71KAL PKA-RP60/71KALR1.TH
PKA-RP60/71KALR1.TH-ER OCH452 OCB452
PSA-RP71KA PSA-RP71KA OCH528
OCB528
PEAD-RP35/50/60/71JA(L)Q PEAD-RP35/50/60/71JA(L)QR1.UK HWE10090
BWE10160
PEAD-M35/50/60/71JA(L)Q PEAD-M35/50/60/71JA(L).UK HWE16130
BWE017010
PEAD-M50/60/71JA(L).TH
SLZ-KF35VA SLZ-KF35VA.TH OCH600
OCB600

3
OCH635A
[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
(1) Check that cylinder for R410A on the market is a syphon type.
(2) Charging should be performed with the cylinder of syphon stood vertically. (Refrigerant is charged from liquid phase.)
Unit
Electronic weighing scale
Make sure that the inside and outside of refrige-
rant piping is clean and it has no contaminants
such as sulfur, oxides, dirt, shaving particles, etc,
which are hazard to refrigerant cycle.
In addition, use pipes with specified thickness.
Contamination inside refrigerant piping can cause deterio-
ration of refrigerant oil, etc.
Store the piping indoors, and both ends of the
piping sealed until just before brazing.
(Leave elbow joints, etc. in their packaging.)
If dirt, dust or moisture enters into refrigerant cycle, that can
cause deterioration of refrigerant oil or malfunction of com-
pressor.
The refrigerant oil applied to flare and flange
connections must be ester oil, ether oil or
alkylbenzene oil in a small amount.
If large amount of mineral oil enters, that can cause deterio-
ration of refrigerant oil, etc.
Charge refrigerant from liquid phase of gas
cylinder.
If the refrigerant is charged from gas phase, composition change
may occur in refrigerant and the efficiency will be lowered.
Do not use refrigerant other than R410A.
If other refrigerant (R22, etc.) is used, chlorine in refrige-
rant can cause deterioration of refrigerant oil, etc.
Handle 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.
Use the following tools specifically designed for
use with R410A refrigerant.
The following tools are necessary to use R410A refrigerant.
Flare tool
Electronic refrigerant
charging scale
Vacuum pump adaptor
Size adjustment gauge
Gauge manifold
Torque wrench
Gas leak detector
Charge hose
Tools for R410A
Ventilate the room if refrigerant leaks during
operation. If refrigerant comes into contact with
a flame, poisonous gases will be released.
Never use any refrigerant other than that specified.
Doing so may cause a burst, an explosion, or fire when the
unit is being used, serviced, or disposed of.
Correct refrigerant is specified in the manuals and on the
spec labels provided with our products.
We will not be held responsible for mechanical failure,
system malfunction, unit breakdown or accidents caused
by failure to follow the instructions.
Use the specified refrigerant only.

Perform the airtight test, vacuum air purging,
additional refrigerant charging (if necessary),
and gas leak check.
• Refer to the owchart below to determine if the existing pipes can be used and if it is necessary to use a lter dryer.
• If the diameter of the existing pipes is di󰀨erent from the specied diameter, refer to technological data materials to conrm if
the pipes can be used.
▼
▼
▼
▼
▼
▼▼
Measure the existing pipe thickness and
check for damage.
The existing pipe thickness meets specica-
tions and the pipes are not damaged.
Check if the existing air conditioner can operate.
After operating the cooling system for about 30
minutes, do a pump down work.
Disconnect the existing air conditioner from the
pipes.
Attach the new air conditioner
Test run The existing pipes cannot be reused.
Use new pipes.
Note:
If the existing air conditioner cannot operate, use a
refrigerant recovery device to collect the refrigerant.
Note:
Use new pipes for ZRP35-71 models.
The existing pipe thickness does not meet
specications or the pipes are damaged.
4
OCH635A
2-3. PRECAUTIONS WHEN REUSING EXISTING R22 REFRIGERANT PIPES
(1) Flowchart
[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. (UNF1/2)
· 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 —

5
OCH635A
(2) Cautions for refrigerant piping work
New refrigerant R410A is adopted for replacement inverter series. Although the refrigerant piping work for R410A is same
as for R22, exclusive tools are necessary so as not to mix with different kind of refrigerant. Furthermore as the working
pressure of R410A is 1.6 times higher than that of R22, their sizes of flared sections and flare nuts are different.
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 0.7 mm 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 its working pressure is higher than that of other refriger-
ants. Therefore, to enhance airtightness and strength, flare cutting dimension of copper pipe for R410A has been speci-
fied separately from the dimensions for other refrigerants as shown below. The dimension B of flare nut for R410A also
has partly been changed to increase strength as shown below. Set copper pipe correctly referring to copper pipe flaring
dimensions for R410A below. For 1/2 and 5/8 inch pipes, the dimension B changes.
Use torque wrench corresponding to each dimension.
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
0.8
0.8
1.0
—
0.8
0.8
0.8
1.0
1.0
Nominal
dimensions(inch)
Diagram below: Piping diameter and thickness
Outside
diameter (mm)
Thickness (mm)
R410A R22
1/4
3/8
1/2
5/8
3/4
6.35
9.52
12.70
15.88
19.05
9.1
13.2
16.6
19.7
—
9.0
13.0
16.2
19.4
23.3
Nominal
dimensions(inch)
Flare cutting dimensions
Outside
diameter(mm) R410A R22
Dimension A ( )
+0
-0.4 (mm)
1/4
3/8
1/2
5/8
3/4
6.35
9.52
12.70
15.88
19.05
17.0
22.0
26.0
29.0 *
—
17.0
22.0
24.0
27.0
36.0
Nominal
dimensions(inch)
Flare nut dimensions Outside
diameter(mm) Dimension B
R410A
* 36.0mm for
indoor unit
of RP100,
125 and 140
R22
(mm)
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
Refrigerant recovery
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 and alkylbenzene
oil (minimum amount)
Tool exclusive for R410A
Tool exclusive for R410A
Tools for other refrigerants can
be used if equipped with adap-
ter for reverse flow check
Tools for other refrigerants
can be used by adjusting
flaring dimension
Tools for other refrigerants can be used
Tools for other refrigerants can be used
Tools for other refrigerants can be used
Tools for other refrigerants can be used
Tools for other refrigerants
can be used
Tool exclusive for R410A
Tools and materials Use R410A tools Can R22 tools be used?
(Usable if equipped
with adapter for rever-
se flow)
(Usable by adjusting
flaring dimension)
Can R407C tools be used?
Ester oil:
Alkylbenzene oil: minimum amount
(Usable if equipped
with adapter 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
OCH635A
3 FEATURES
CHARGELESS SYSTEM
PRE-CHARGED REFRIGERANT IS SUPPLIED FOR PIPING LENGTH AT SHIPMENT
Maximum 30 m (PUHZ-ZRP35–71)
The refrigerant circuit with LEV (Linear Expansion Valve) and power receiver always control the optimal refrigerant level
regardless of the length (30 m maximum and 5 m minimum) of piping. The additional refrigerant charging work during instal-
lation 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.
PUHZ-ZRP35VKA2
PUHZ-ZRP35VKA2-ER
PUHZ-ZRP35VKA2-ET
PUHZ-ZRP50VKA2
PUHZ-ZRP50VKA2-ER
PUHZ-ZRP50VKA2-ET
PUHZ-ZRP60VHA2
PUHZ-ZRP60VHA2-ER
PUHZ-ZRP60VHA2-ET
PUHZ-ZRP71VHA2
PUHZ-ZRP71VHA2-ER
PUHZ-ZRP71VHA2-ET

7
OCH635A
4 SPECIFICATIONS
A
kW
W
kW
K
/min (CFM )
dB
dB
mm (inch)
mm (inch)
mm (inch)
kg (lb)
kg (lb)
L
mm (inch)
mm (inch)
Power supply (phase, cycle, voltage)
Max. current
External finish
Refrigerant control
Compressor
Model
Motor output
Starter type
Protection devices
Crankcase heater
Heat exchanger
Fan Fan(drive) oNo.
Fan motor output
Airflow
Defrost method
Sound pressure level
Dimensions
Weight
Refrigerant
Charge
Oil (Model)
Pipe size O.D.
Connection method
Between the indoor &
outdoor unit
Mode
Cooling
Heating
W
D
H
Liquid
Gas
Indoor side
Outdoor side
Height difference
Piping length
Service Ref. PUHZ-ZRP35VKA2
PUHZ-ZRP35VKA2-ER
PUHZ-ZRP35VKA2-ET
PUHZ-ZRP50VKA2
PUHZ-ZRP50VKA2-ER
PUHZ-ZRP50VKA2-ET
Cooling
13
SNB092FGCM
0.6
Munsell 3Y 7.8/1.1
Linear Expansion Valve
Hermetic
Inverter
—
Plate fin coil
Propeller fan o1
0.046
45 (1,590)
Reverse cycle
44
46
809 (31-13/16)
300 (11-3/16)
630 (24-13/16)
R410A
6.35 (1/4)
12.7 (1/2)
Flared
Flared
Maximum 30m
Maximum 50m
Heating Cooling
13
SNB130FGCM2
1.1
Heating
HP switch
Comp.shell thermo
Single, 50Hz, 230V
OUTDOOR UNIT
REFRIGERANT PIPING
43 (95)
2.2 (4.8)
0.35 (FV50S) 0.50 (FV50S)
46 (101)
2.4 (5.3)
A
kW
W
kW
K
/min (CFM )
dB
dB
mm (inch)
mm (inch)
mm (inch)
kg (lb)
kg (lb)
L
mm (inch)
mm (inch)
Power supply (phase, cycle, voltage)
Max. current
External finish
Refrigerant control
Compressor
Model
Motor output
Starter type
Protection devices
Crankcase heater
Heat exchanger
Fan Fan(drive) oNo.
Fan motor output
Airflow
Defrost method
Sound pressure level
Dimensions
Weight
Refrigerant
Charge
Oil (Model)
Pipe size O.D.
Connection method
Between the indoor &
outdoor unit
Mode
Cooling
Heating
W
D
H
Liquid
Gas
Indoor side
Outdoor side
Height difference
Piping length
Service Ref. PUHZ-ZRP71VHA2
PUHZ-ZRP71VHA2-ER
PUHZ-ZRP71VHA2-ET
PUHZ-ZRP60VHA2
PUHZ-ZRP60VHA2-ER
PUHZ-ZRP60VHA2-ET Cooling
Propeller fan o1
0.06
55 (1,940)
47
48
943 (37-1/8)
70 (154)
3.5 (7.7)
Maximum 50m
Munsell 3Y 7.8/1.1
Linear Expansion Valve
Hermetic
Inverter
—
Plate fin coil
Reverse cycle
950 (37-3/8)
330+30 (13+1-3/16)
R410A
9.52 (3/8)
15.88 (5/8)
Flared
Flared
Maximum 30m
HeatingCooling Heating
HP switch
Comp.shell thermo
Single, 50Hz, 230V
OUTDOOR UNIT
REFRIGERANT PIPING
1.31.2
19
SNB130FGCM1 SNB172FSHM1
0.65 (FV50S) 0.70 (FV50S)

8
OCH635A
5DATA
5-1. REFILLING REFRIGERANT CHARGE (R410A: kg)
Additional charge is required for pipes longer
than 30 m.
Service Ref. Piping length (one way) Initial
charged
10 m 20 m 30 m 40 m 50 m 60 m 75 m
PUHZ-ZRP35VKA2
PUHZ-ZRP35VKA2-ER
PUHZ-ZRP35VKA2-ET 1.8 2.0 2.2 2.4 2.6 — — 2.2
PUHZ-ZRP50VKA2
PUHZ-ZRP50VKA2-ER
PUHZ-ZRP50VKA2-ET 2.0 2.2 2.4 2.6 2.8 — — 2.4
PUHZ-ZRP60VHA2
PUHZ-ZRP60VHA2-ER
PUHZ-ZRP60VHA2-ET 3.1 3.3 3.5 4.1 4.7 — — 3.5
PUHZ-ZRP71VHA2
PUHZ-ZRP71VHA2-ER
PUHZ-ZRP71VHA2-ET 3.1 3.3 3.5 4.1 4.7 — — 3.5
5-2. COMPRESSOR TECHNICAL DATA (at 20:)
Service Ref. PUHZ-ZRP35VKA2 PUHZ-ZRP35VKA2-ER
PUHZ-ZRP35VKA2-ET
PUHZ-ZRP50VKA2
PUHZ-ZRP50VKA2-ER
PUHZ-ZRP50VKA2-ET
PUHZ-ZRP60VHA2
PUHZ-ZRP60VHA2-ER
PUHZ-ZRP60VHA2-ET
PUHZ-ZRP71VHA2
PUHZ-ZRP71VHA2-ER
PUHZ-ZRP71VHA2-ET
Compressor model SNB092FGCM SNB130FGCM2 SNB130FGCM1 SNB172FSHM1
Winding
Resistance
(Ω)
U-V 0.64 0.64 0.64 1.34
U-W 0.64 0.64 0.64 1.34
W-V 0.64 0.64 0.64 1.34

9
OCH635A
5-3. NOISE CRITERION CURVES
1.5 m
1 m
MICROPHONE
UNIT
GROUND
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
PUHZ-ZRP35VKA2 (-ER/-ET)
PUHZ-ZRP50VKA2 (-ER/-ET)
COOLING
MODE
HEATING
44
SPL(dB)
46
LINE
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
BAND CENTER FREQUENCIES, Hz
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
PUHZ-ZRP 60VHA 2(-ER/-ET)
PUHZ-ZRP
71VHA 2(-ER/-ET)
COOLING
MODE
HEATING
47
SPL(dB)
48
LINE

10
OCH635A
TotalElectrical circuitRefrigerant circuitIndoor side
Outdoor
side
Representative matching
SHF
BF
W
kW
Mode
Capacity
Input
PLA-ZP71EA
PLA-ZP71EA
Cooling
7,100
1.77
Heating
8,000
1.99
7.63
2.70
1.00
67
46
12
5
27
19
14.7
35
24
0.81
0.09
8.65
2.45
0.69
71
41
3
5
20
15
36.0
7
6
—
—
1 , 50
230
PUHZ-ZRP71VHA2
1 , 50
230
Phase , Hz
Voltage
Current
Outdoor unit
Phase , Hz
Voltage
Current
Discharge pressure
Suction pressure
Discharge temperature
Condensing temperature
Suction temperature
Ref. pipe length
Intake air temperature
Discharge air temperature
Intake air temperature
V
A
V
A
MPa
MPa
°C
°C
°C
m
°C
°C
°C
°C
°C
Indoor unit
D.B.
W.B.
D.B.
D.B.
W.B.
PLA-ZP35EA PLA-ZP50EA PLA-ZP60EA
PLA-ZP35EA PLA-ZP50EA PLA-ZP60EA
Cooling
3,600
0.79
Heating
4,100
0.86
Cooling
5,000
1.43
Heating
6,000
1.57
Cooling
6,100
1.78
Heating
7,000
2.04
3.58
2.58
1.08
62
44
15
5
27
19
17.4
35
24
0.92
0.24
3.97
2.04
0.70
58
34
4
5
20
15
31.0
7
6
—
—-
6.23
2.67
1.00
63
44
11
5
27
19
16.0
35
24
0.83
0.18
6.90
2.43
0.68
68
39
0
5
20
15
35.3
7
6
—-
—
7.72
2.62
0.98
66
44
10
5
27
19
13.6
35
24
0.72
0.14
8.92
2.53
0.71
65
41
1
5
20
15
39.0
7
6
—
—
1 , 50
230
PUHZ-ZRP35VKA2
1 , 50
230
1 , 50
230
PUHZ-ZRP50VKA2
1 , 50
230
1 , 50
230
PUHZ-ZRP60VHA2
1 , 50
230
0.28 0.25 0.30 0.27 0.30 0.27 0.45 0.41
5-4. STANDARD OPERATION DATA
The unit of pressure has been changed to MPa based on international SI system.
The conversion factor is : 1(MPa)=10.2(kgf/cm²)