Mitsubishi Electric Mr.SLIM PKA-RP35GAL User manual

SERVICE MANUAL
CONTENTS
1. TECHNICAL CHANGES......................................2
2. REFERENCE MANUAL.......................................2
3. SAFETY PRECAUTION.......................................3
4. PART NAMES AND FUNCTIONS........................7
5. SPECIFICATIONS................................................9
6. NOISE CRITERION CURVES............................11
7. OUTLINES AND DIMENSIONS.........................12
8. WIRING DIAGRAM............................................. 13
9. REFRIGERANT SYSTEM DIAGRAM......................... 14
10. TROUBLE SHOOTING....................................... 15
11. SPECIAL FUNCTION.........................................30
12. DISASSEMBLY PROCEDURE...........................33
13. PARTS LIST........................................................37
14. RoHS PARTS LIST............................................. 40
Indoor unit
[Model names]
PKA-RP35GAL
PKA-RP50GAL
[Service Ref.]
PKA-RP35GAL
PKA-RP35GAL#1
PKA-RP50GAL
PKA-RP50GAL#1
Indoor unit
No.OC330
REVISED EDITION-B
Remote controller
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
SPLIT-TYPE, AIR CONDITIONERS
Model name
indication
PKH-P35GALH
PKH-P50GALH
PKH-P35GALH
PKH-P50GALH
May 2008
Revision :
• PKA-RP35·50GAL#1 are
added in REVISEDEDITION-B .
• Some discriptions have been
modified.
• Please void OC330
REVISED EDITION-A.
Note :
•This manual describes only
service data of the indoor
units.
• RoHS compliant products
have <G> mark on spec
name plate.
For servicing of RoHS
compliant products, refer to
the RoHS Parts List.

2
1
2-1. OUTDOOR UNIT’S SERVICE MANUAL
2-2. TECHNICAL DATA BOOK
2REFERENCE MANUAL
TECHNICAL CHANGES
PKA-RP35GAL PKA-RP35GAL#1
PKA-RP50GAL PKA-RP50GAL#1
INDOOR CONTROLLER BOARD(I.B.) has been changed.
Service Ref. Service Manual No.
PUHZ-RP35/50/60/71/100/125/140VHA(1)
PUHZ-RP100/125/140YHA OC334
PUHZ-RP71/100/125/140VHA(1)-A OC337
PUHZ-RP200/250YHA(1)(2) OC338
PUHZ-RP200/250YHA(1)-A OC339
PU(H)-P • VGAA.UK
PU(H)-P • YGAA.UK OC336
PUHZ-P100/125/140VHA.UK OC359
PUHZ-RP35/50/60/71/100/125/140VHA2(1)
PUHZ-RP100/125/140YHA2(1)
PUHZ-RP35/50/60/71/100VHA3
PUHZ-RP100YHA3
OC374
PU(H)-P71/100VHA(1).UK
PU(H)-P100/125/140YHA(1).UK OC379
PUHZ-P100/125/140VHA2(1).UK OCH415 / OCB415
PUHZ-RP71/100/125/140VHA2-A
PUHZ-RP100/125/140YHA2-A OCH422 / OCB422
PUHZ-BP100/125/140VHA-A
PUHZ-BP200/250YHA-A OCH423 / OCB423
PUHZ-P200/250YHA2 OCH424 / OCB424
PUHZ-HRP71/100VHA
PUHZ-HRP100/125YHA OCH425 / OCB425
PUHZ-RP200/250YHA2 OCH428 / OCB428
Series (Outdoor unit) Manual No.
PUHZ-RP • HA(-A) OCS01
PU(H)-P • GAA.UK OCS02
PUHZ-RP • HA2 OCS05
PUHZ-P • HA OCS06
PU(H)-P • HA OCS07
PUHZ-P • VHA2, PUHZ-P • YHA OCS08
PUHZ-RP • HA2-A OCS09
PUHZ-BP • HA OCS10
PUHZ-HRP • HA OCS11

3
Cautions for units utilizing refrigerant R407C
3-2. CAUTIONS RELATED TO NEW REFRIGERANT
Do not use the existing refrigerant piping.
The old refrigerant and lubricant in the existing piping
contains a large amount of chlorine which may cause the
lubricant deterioration of the new unit.
Use “low residual oil piping”
If there is a large amount of residual oil (hydraulic oil, etc.)
inside the piping and joints, deterioration of the lubricant
will result.
Use ESTER , ETHER or HAB as the lubricant to
coat flares and flange connection parts.
If large amount of mineral oil enter, that can cause
deterioration of refrigerant oil etc.
Use liquid refrigerant to seal the system.
If gas refrigerant is used to seal the system, the composition
of the refrigerant in the cylinder will change and performance
may drop.
Do not use a refrigerant other than R407C.
If another refrigerant (R22, etc.) is used, the chlorine in the
refrigerant may cause the lubricant deterioration.
Use a vacuum pump with a reverse flow check valve.
The vacuum pump oil may flow back into the refrigerant
cycle and cause the lubricant deterioration.
Store the piping to be used during installation
indoors with keep both ends sealed until just
before brazing.
(Store elbows and other joints in a plastic bag.)
If dust, dirt, or water enters the refrigerant cycle,
deterioration of the oil and compressor trouble may result. Ventilate the room if refrigerant leaks during
operation. If refrigerant comes into contact with
a flame, poisonous gases will be released.
SAFETY PRECAUTION
3
3-1. ALWAYS OBSERVE FOR SAFETY
Before obtaining access to terminal, all supply
circuits must be disconnected.

4
[2] Refrigerant recharging
(1) Refrigerant recharging process
1Direct charging from the cylinder.
·R407C cylinder are available on the market has a syphon pipe.
·Leave the syphon pipe cylinder standing and recharge it.
(By liquid refrigerant)
(2) Recharge in refrigerant leakage case
·After recovering the all refrigerant in the unit, proceed to working.
·Do not release the refrigerant in the air.
·After completing the repair service, recharge the cycle with the specified amount of
liquid refrigerant.
[1] Cautions for service
·After recovering the all refrigerant in the unit, proceed to working.
·Do not release refrigerant in the air.
·After completing the repair service, recharge the cycle with the specified amount of
liquid refrigerant.
Gravimeter
Unit
No. Tool name Specifications
1Gauge manifold ·Only for R407C.
·Use the existing fitting SPECIFICATIONS. (UNF7/16)
·Use high-tension side pressure of 3.43MPa·G or over.
2Charge hose ·Only for R407C.
·Use pressure performance of 5.10MPa·G or over.
3Electronic scale
4Gas leak detector ·Use the detector for R134a or R407C.
5Adapter for reverse flow check. ·Attach on vacuum pump.
6Refrigerant charge base.
7Refrigerant cylinder. ·For R407C ·Top of cylinder (Brown)
·Cylinder with syphon
8Refrigerant recovery equipment.
[3] Service tools
Use the below service tools as exclusive tools for R410A refrigerant.

5
Cautions for units utilizing refrigerant R410A
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.
· 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 enter 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 enter into refrigerant cycle, that can
cause deterioration of refrigerant oil or malfunction of com-
pressor.
If large amount of mineral oil enter, 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 collecting 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.)

6
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
Gravimeter
Unit
[3] Service tools
Use the below service tools as exclusive tools for R410A refrigerant.

77
4PART NAMES AND FUNCTIONS
Indoor Unit
Air intake Air intake grille
Filter
Air outlet
Guide vane
Auto vane

8
Wireless remote controller
When cover is open.
ON/OFF TEMP
FAN
VANE
TEST RUN
AUTO STOP
AUTO START
h
min
LOUVER
MODE
CHECK
RESETSET CLOCK
MODEL SELECT
NOTAVAILABLE
CHECK TEST RUN
°C
AMPM
AMPM
VANE CONTROL button
Used to change the air flow direction.
CLOCK button
RESET button
SET buttonCLOCK button
ON/OFF button
The unit is turned ON and OFF alternately
each time the button is pressed.
LOUVER button
Changes left/right airflow direction.
(Not available for this model.)
MODE SELECT button
Used to switch the operation mode between
cooling, drying, heating and auto mode.
CHECK-TEST RUN button
Only press this button to perform an
inspection check or test operation.
Do not use it for normal operation.
FAN SPEED SELECT button
Used to change the fan speed.
TIMER display
Displays when in timer operation or when
setting timer.
button
SET TEMPERATURE button sets any desired
room temperature.
CLOCK display
Displays the current time.
“ ” “ ” display
Displays the order of timer operation.
“ ” “ ” display
Displays whether timer is on or off.
+In case the outdoor unit is cool only type,
the heating and auto mode not available.
Buttons used to set the “hour and minute” of
the current time and timer settings.
h and min buttons
display
SET TEMP. display indicates desired
temperature set.
display
FAN SPEED display indicates which fan
speed has been selected.
display
The vertical direction of air flow is indicated.
display
Blinks when model is selected.
display
Lights up while transmission to the indoor
unit is mode using switches.
display
CHECK&TEST RUN display indicates that
the unit is being checked or test-run.
display
OPERATION MODE display
Operation mode display indicates which
operation mode is in effect.
TIMER CONTROL buttons
AUTO STOP (OFF timer): when this switch
is set, the air conditioner will be
automatically stopped at the preset time.
AUTO START (ON timer): when this switch is
set, the air conditioner will be automatically
started at the preset time.
MODEL SELECT
CHECK TEST RUN

99
5SPECIFICATIONS
kW
A
A
kW
*/min(CFM)
Pa(mmAq)
dB
mm(in.)
mm(in.)
mm(in.)
mm(in.)
kg(lbs)
Service Ref.
Mode
Power supply(phase, cycle, voltage)
Input
Running current
Starting current
External finish
Heat exchanger
Fan Fan(drive) x No.
Fan motor output
Airflow(Low-Medium2-Medium1-High)
External static pressure
Operation control & Thermostat
Noise level(Low-Medium2-Medium1-High)
Unit drain pipe O.D.
Dimensions
Weight
W
D
H
INDOOR UNIT
Cooling
0.07
0.33
0.40
Heating
0.07
0.33
0.40
Single phase, 50Hz, 230V
Munsell 0.70Y 8.59/0.97
Plate fin coil
Line flow (direct) x 1
0.030
9-10-11-12(320-355-390-425)
0(direct blow)
Wireless remote controller & built-in
36-38-41-43
20(13/16)
990(39)
235(9-1/4)
340(13-3/8)
16(35)
PKA-RP50GAL, PKA-RP50GAL#1
kW
A
A
kW
*/min(CFM)
Pa(mmAq)
dB
mm(in.)
mm(in.)
mm(in.)
mm(in.)
kg(lbs)
Service Ref.
Mode
Power supply(phase, cycle, voltage)
Input
Running current
Starting current
External finish
Heat exchanger
Fan Fan(drive) x No.
Fan motor output
Airflow(Low-Medium2-Medium1-High)
External static pressure
Operation control & Thermostat
Noise level(Low-Medium2-Medium1-High)
Unit drain pipe O.D.
Dimensions
Weight
W
D
H
INDOOR UNIT
PKA-RP35GAL, PKA-RP35GAL#1
Cooling
0.07
0.33
0.40
Heating
0.07
0.33
0.40
Single phase, 50Hz, 230V
Munsell 0.70Y 8.59/0.97
Plate fin coil
Line flow (direct) x 1
0.030
9-10-11-12(320-355-390-425)
0(direct blow)
Wireless remote controller & built-in
36-38-41-43
20(13/16)
990(39)
235(9-1/4)
340(13-3/8)
16(35)

10
Single phase, 50Hz, 230V
Munsell 0.70Y8.59/0.97
Plate fin coil
Line flow (direct) x 1
0.030
9-10-11-12(318-353-388-424)
0(direct blow)
<0.73>
Wireless remote controller & built-in
36-38-41-43
20(13/16)
990(39)
235(9-1/4)
340(13-3/8)
17(37)
Service Ref.
Mode
Power supply(phase, cycle,voltage)
Input +1
Running current +1
Starting current +1
External finish
Heat exchanger
Fan Fan(drive) x No.
Fan motor output
Airflow(Low-Medium2-Medium1-High)
External static pressure
Booster heater +1
Operation control & Thermostat
Noise level(Low-Medium2-Medium1-High)
Unit drain pipe O.D.
Dimensions
Weight
INDOOR UNIT
W
D
H
+1 : < > Shows the onl
y
booster heater ratin
g
.
PKH-P35GALH
Cooling
0.07
0.33
0.40
Heating
0.07<0.73>
0.33<3.17>
0.40<3.17>
kW
A
A
kW
*/min(CFM)
Pa(mmAq)
kW
dB
mm(in.)
mm(in.)
mm(in.)
mm(in.)
kg(lbs)
Single phase, 50Hz, 230V
Munsell 0.70Y 8.59/0.97
Plate fin coil
Line flow (direct) x 1
0.030
9-10-11-12(318-353-388-424)
0(direct blow)
<0.73>
Wireless remote controller & built-in
36-38-41-43
20(13/16)
990(39)
235(9-1/4)
340(13-3/8)
17(37)
kW
A
A
kW
*/min(CFM)
Pa(mmAq)
kW
dB
mm(in.)
mm(in.)
mm(in.)
mm(in.)
kg(lbs)
Service Ref.
Mode
Power supply(phase, cycle,voltage)
Input +1
Running current +1
Starting current +1
External finish
Heat exchanger
Fan Fan(drive) x No.
Fan motor output
Airflow(Low-Medium2-Medium1-High)
External static pressure
Booster heater +1
Operation control & Thermostat
Noise level(Low-Medium2-Medium1-High)
Unit drain pipe O.D.
Dimensions
Weight
INDOOR UNIT
W
D
H
Cooling
0.07
0.33
0.40
Heating
0.07<0.73>
0.33<3.17>
0.40<3.17>
PKH-P50GALH
+1 : < > Shows the onl
y
booster heater ratin
g
.