Mitsubishi Electric PUHZ-RP35VHA2 User manual

SERVICE MANUAL
CONTENTS
1. TECHNICAL CHANGES................................. 3
2. REFERENCE MANUAL.................................. 4
3. SAFETY PRECAUTION..................................5
4. FEATURES......................................................9
5. SPECIFICATIONS.........................................10
6. DATA............................................................. 13
7. OUTLINES AND DIMENSIONS.................... 20
8. WIRING DIAGRAM....................................... 25
9. WIRING SPECIFICATIONS.......................... 35
10. REFRIGERANT SYSTEM DIAGRAM............... 40
11. TROUBLESHOOTING...................................43
12. FUNCTION SETTING.................................. 110
13. MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER
..... 117
14. EASY MAINTENANCE FUNCTION............127
15. DISASSEMBLY PROCEDURE................... 132
16. PARTS LIST................................................ 154
17. RoHS PARTS LIST..................................... 165
No.OC374
REVISED EDITION-F
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
R410A
May 2009
Outdoor unit
[model names]
PUHZ-RP35VHA2 PUHZ-RP35VHA3
PUHZ-RP50VHA2 PUHZ-RP50VHA3
PUHZ-RP60VHA2 PUHZ-RP60VHA3
PUHZ-RP71VHA2 PUHZ-RP71VHA3
PUHZ-RP100VHA2 PUHZ-RP100VHA3
PUHZ-RP125VHA2
PUHZ-RP140VHA2
PUHZ-RP100YHA2 PUHZ-RP100YHA3
PUHZ-RP125YHA2
PUHZ-RP140YHA2
[Service Ref.]
Service Ref. is on page 2.
PUHZ-RP60VHA2 PUHZ-RP60VHA21
PUHZ-RP71VHA2 PUHZ-RP71VHA21
PUHZ-RP60VHA3 PUHZ-RP71VHA3
PUHZ-RP60VHA3#1 PUHZ-RP71VHA3#1
NOTE:
• This manual describes only
service data of the outdoor
units.
• RoHS compliant products have
<G> mark on the spec name
plate.
• For servicing of RoHS compli-
ant products, refer to the RoHS
PARTS LIST.
Revision:
• "17. RoHS PARTS LIST" has
been modified.
• Please void OC374 REVISED
EDITION-E.

PUHZ-RP35/50VHA21PUHZ-RP35/50VHA3
· Muffler has been changed.
· Compressor (MC) has been changed.
· Controller circuit board (C.B.) and power circuit board (P.B.) have been changed.
PUHZ-RP60/71VHA21PUHZ-RP60/71VHA3
· Compressor (MC) and oil(type and amount) have been changed.
· Refigerant circiuit has been changed.
· Ball valve (Gas) Stop valve
· Controller circuit board (C.B.) has been changed.
PUHZ-RP100VHA21PUHZ-RP100VHA3
· Compressor (MC) has been changed.
· Controller circuit board (C.B.) and power circuit board (P.B.) have been changed.
PUHZ-RP100YHA21PUHZ-RP100YHA3
· Compressor (MC) has been changed.
· Controller circuit board (C.B.) has been changed.
1TECHNICAL CHANGES
PUHZ-RP60 / 71VHA3 PUHZ-RP60 / 71VHA3#1
· Add thermistor (Comp. Shell / TH32).
· Thermistor (Discharge / TH4) has been changed.
· Controller circuit board (C.B.) has been changed.
PUHZ-RP100VHA3 PUHZ-RP100VHA3#1
PUHZ-RP100YHA3 PUHZ-RP100YHA3#1
PUHZ-RP125 / 140VHA21PUHZ-RP125 / 140VHA2#2
PUHZ-RP125 / 140YHA21PUHZ-RP125 / 140 YHA2#2
·Add thermistor (Comp. Shell / TH32).
· Thermistor (Discharge / TH4) has been changed.
· Controller circuit board (C.B.) has been changed
· Compressor (MC) has been changed.
· Propeller fan has been changed.
3
Revision:
"17. RoHS PARTS LIST " has been modified on page 171, 177 and 181.
Page Revise point Service Ref. Incorrect Correct
171
FUNCTIONAL AND
ELECTRICAL PARTS
No.33
THERMISTOR (SHELL)
PUHZ-RP60/71VHA3#1 T7W E39 202 T7W E11 201
177
FUNCTIONAL AND
ELECTRICAL PARTS
No.37
THERMISTOR (SHELL)
PUHZ-RP100VHA3#1
PUHZ-RP125/140VHA2#2
T7W E39 202 T7W E11 201
181
FUNCTIONAL AND
ELECTRICAL PARTS
No.40
THERMISTOR (SHELL)
PUHZ-RP100YHA3#1
PUHZ-RP125/140YHA2#2
T7W E39 202 T7W E11 201

4
2REFERENCE MANUAL
2-1. INDOOR UNIT SERVICE MANUAL
Model name Service Ref. Service
Manual No.
PLA-RP35/50/60/71AA
PLA-RP35/50/60/71AA.UK OC335
PLA-RP35/50/60/71AA OC327
OC328
PLA-RP100/125/140AA2 PLA-RP100/125/140AA2.UK
PCA-RP50/60/71/100/125/140GA
PCA-RP50GA2
PCA-RP50/60/71/100/125/140GA
PCA-RP50GA2
OC329
PCA-RP71/125HA PCA-RP71/125HA
OC330
PKA-RP35/50GAL PKA-RP35/50GAL
OC331
PKA-RP60/71/100FAL
PKA-RP50FAL2
PKA-RP60/71/100FAL
PKA-RP50FAL2
OC332
PSA-RP71/100/125/140GA PSA-RP71/100/125/140GA
PEAD-RP50/60/71/125/140EA PEAD-RP50/60/71/125/140EA.UK
PEAD-RP35/100EA2 PEAD-RP35/100EA2.UK
PEAD-RP60/71/100GA PEAD-RP60/71/100GA.UK
2-2.TECHNICAL DATA BOOK
Manual No. OCS05
OC357
PLA-RP35/50/60/71/100/125/140BA
PLA-RP71/100/125BA2
PLA-RP35/50/60/71/100/125/140BA.UK
PLA-RP71/100/125BA2.UK
OCH412
OCB412
HWE05210
HWE05060
PUHZ-RP35/50/60/71VHA2 PUHZ-RP35/50/60/71VHA21
· Electrical parts have been changed.
Controller circuit board (C.B.) , Power circuit board (P.B.) , Noise filter circuit board (N.F.)
PUHZ-RP100/125/140VHA2 PUHZ-RP100/125/140VHA21
· Compressor (MC) has been changed.
· Electrical parts have been changed.
Controller circuit board (C.B.) , Power circuit board (P.B.) , Noise filter circuit board (N.F.) , Active filter module (ACTM)
PUHZ-RP100/125/140YHA2 PUHZ-RP100/125/140YHA21
· Compressor (MC) has been changed.
· Electrical parts have been changed.
Controller circuit board (C.B.) , Power circuit board (P.B.) , Noise filter circuit board (N.F.)

5
3SAFETY PRECAUTION
Cautions for units utilizing refrigerant R410A
3-2. 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 indoors during
installation and 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.
· For RP60/71VHA3 and RP100/125/140, be sure to
perform replacement operation before test run.
· 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.
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.
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.
[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.)
3-1. ALWAYS OBSERVE FOR SAFETY
Before obtaining access to termnal, all supply
ciucuits must disconnected.

6
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. (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
[4] Refrigerant leakage detection function
This air conditioner (outdoor unit PUHZ-RP•HA2/HA3) can detect refrigerant leakage which may happen during a
long period of use. In order to enable the leakage detection, settings are required to let the unit memorize the initial
conditions(initial learning). Refer to 14-3. INITIAL SETTINGS FOR REFRIGERANT LEAKAGE DETECTION FUNCTION.

7
3-3. PRECAUTIONS WHEN REUSING EXISTING R22 REFRIGERANT PIPES
(1) Flowchart
Connecting a new air conditioner
Flaring work should be done so that flare meets the dimension for R410A.
Use flare nut provided with indoor and outdoor unit.
When using gas piping of :19.05mm for RP100, 125 or 140.
Make sure that DIP SW8-1 on outdoor unit controller board is set to ON.
This is to keep the pressure on pipes within permissible range.
●Use different diameter joint or adjust the piping size by brazing.
When using pipes larger than specified size for RP35, 50, 60 or 71.
Make sure that DIP SW8-1 on outdoor unit controller board is set to ON.
 This is to prevent oil flow ratio from lowering due to the decrease in flowing refrigerant.
●Use different diameter joint or adjust the piping size by brazing.
When existing pipes are specified size.
The pipes can be reused referring to TECHNICAL DATA BOOK (OCS05).
●Use different diameter joint or adjust the piping size by brazing.
*When using existing pipes for RP60/71VHA3 and RP100/125/140
Make sure that DIP SW8-2 on outdoor unit controller board is set to ON and perform
replacement operation.
+Chemical compounds containing chlorine left in existing pipes are collected by replace filter.
●The air conditioner automatically performs cooling operation through replace filter for about 2 hours.
Measure the existing pipe thickness and check for damage.
Check if existing air conditioner can operate.
Existing air conditioner can
operate.
Disconnect existing air con-
ditioner from piping.
Existing pipes can be reused.
In case the unit is RP35/50
or RP60/71VHA2(1) which
utilizes HAB oil.
In case the unit is RP60/71
VHA3 or RP100/125/140
which utilize ester oil or
ether oil.
Perform cooling operation
for about 30 minutes and
then do a pump down work.
Use a refrigerant recovery
equipment to recover the
refrigerant.
Existing air conditioner
cannot operate.
The existing pipe thickness meets speci-
fications and the pipes are not damaged.
The existing pipe thickness does not meet
specifications or the pipes are damaged.
Connect a new air conditioner.
Connect a new air conditioner.
Perform replacement operation.
·When performing replacement operation, make sure that DIP SW8-2 on outdoor unit controller board is
set to ON.
+Chemical compounds containing chlorine left in existing pipes are collected by replace filter.
●The air conditioner automatically performs cooling operation through replace filter for about 2 hours.
Existing pipes cannot be
reused. Use new pipes.
+In case existing pipes were used
for gas or oil heat pump system,
be sure to clean the pipes for RP100-140 models.
Use new pipes for RP35-71 models.

8
(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 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 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 intensity, flare cutting dimension of copper pipe for R410A have been speci-
fied separately from the dimensions for other refrigerants as shown below. The dimension B of flare nut for R410A also
have 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.
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
Dimension A ( )
+0
-0.4
(mm)
R410A R22
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
Dimension B
(mm)
R410A
+
+36.0mm for
indoor unit
of RP100,
125 and 140
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
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 adop-
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 adopter for rever-
se flow)
(Usable by adjusting
flaring dimension)
Can R407C tools be used?
Ester oil:
Alkylbenzene oil: minimum amount
(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

9
4 FEATURES
CHARGELESS SYSTEM
PRE-CHARGED REFRIGERANT IS SUPPLIED FOR PIPING LENGTH AT SHIPMENT.
Max.30m (PUHZ-RP35/50/60/71/100/125/140)
The refrigerant circuit with LEV (Linear Expansion Valve) and power receiver always control the optimal refrigerant
level regardless of the length (30m max. and 5m min.) of piping. The additional refrigerant charging work during
installation often causes problems. It is completely eliminated by chargelss system. This unique system improves the quality
and reliability of the work done. It also helps to speed up the installation time.
REFRIGERANT LEAKAGE DETECTION FUNCTION
PUHZ-RP•HA2/HA3 series can detect refrigerant leakage which may happen during a long period of
use.
PUHZ-RP60/71VHA2
PUHZ-RP60/71VHA21
PUHZ-RP60/71VHA3
PUHZ-RP60/71VHA3#1
PUHZ-RP100/125/140VHA2
PUHZ-RP100/125/140VHA21
PUHZ-RP125/140VHA2#2
PUHZ-RP100/125/140YHA2
PUHZ-RP100/125/140YHA21
PUHZ-RP125/140YHA2#2
PUHZ-RP100VHA3
PUHZ-RP100VHA3#1
PUHZ-RP100YHA3
PUHZ-RP100YHA3#1
PUHZ-RP35/50VHA2
PUHZ-RP35/50VHA21
PUHZ-RP35/50VHA3

10
5 SPECIFICATIONS
A
A
kW
W
kW
*
/min(CFM )
dB
dB
mm(in.)
mm(in.)
mm(in.)
kg(lbs)
kg(lbs)
L
mm(in.)
mm(in.)
Power supply (phase, cycle, voltage)
Running current
Max. current
External finish
Refrigerant control
Compressor
Model
Motor output
Starter type
Protection devices
Crankcase heater
Heat exchanger
Fan Fan(drive) %No.
Fan motor output
Airflow
Defrost method
Noise 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-RP35VHA2(1) / VHA3 PUHZ-RP50VHA2(1) / VHA3
Cooling
4.01
13
0.9
Munsell 3Y 7.8/1.1
Linear Expansion Valve
Hermetic
VHA2(1) : SNB130FLBH / VHA3 : SNB130FGCH
Inverter
—
Plate fin coil
Propeller fan %1
0.043
35(1,240)
Reverse cycle
44
46
800(31-1/2)
300+23(11-13/16+7/8)
600(23-5/8)
VHA2(1) : 45(99) / VHA3 : 42(93)
R410A
2.5(5.5)
0.45(NEO22)
6.35(1/4)
12.7(1/2)
Flared
Flared
Max. 30m
Max. 50m
Heating
4.23
Cooling
6.16
13
1.1
Heating
6.47
HP switch
Discharge thermo HP switch Discharge thermo
Single, 50Hz, 230V
OUTDOOR UNIT
REFRIGERANT PIPING
A
A
kW
W
kW
*
/min(CFM )
dB
dB
mm(in.)
mm(in.)
mm(in.)
kg(lbs)
kg(lbs)
L
mm(in.)
mm(in.)
Power supply (phase, cycle, voltage)
Running current
Max. current
External finish
Refrigerant control
Compressor
Model
Motor output
Starter type
Protection devices
Crankcase heater
Heat exchanger
Fan Fan(drive) %No.
Fan motor output
Airflow
Defrost method
Noise 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-RP71VHA2(1) / VHA3(#1)
PUHZ-RP60VHA2(1) / VHA3(#1)
Cooling
8.04
VHA2(1) : TNB220FMBH / VHA3 : SNB172FDGM1
Propeller fan %1
0.060
55(1,940)
47
48
943(37-1/8)
VHA2(1) : 75(165) / VHA3(#1) : 68(150)
3.5(7.7)
VHA2(1) : 0.87(NEO22) / VHA3(#1) : 0.70(FV50S)
Max. 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
Max. 30m
Heating
9.74
Cooling
6.61
Heating
7.50
HP switch Discharge thermo
Comp.shell thermo(for VHA3#1)
Single, 50Hz, 230V
OUTDOOR UNIT
REFRIGERANT PIPING
1.61.4
19