Mitsubishi Electric Mr.Slim PKA-RP50FAL2 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................................................8
6. NOISE CRITERION CURVES............................10
7. OUTLINES AND DIMENSIONS.......................... 11
8. WIRING DIAGRAM............................................. 13
9. REFRIGERANT SYSTEM DIAGRAM......................... 14
10. TROUBLE SHOOTING.......................................15
11. SPECIAL FUNCTION.........................................30
12. DISASSEMBLY PROCEDURE...........................33
13. PARTS LIST........................................................ 36
14. RoHS PARTS LIST.............................................42
Indoor unit
[Model names]
PKA-RP50FAL2
PKA-RP60FAL
PKA-RP71FAL
PKA-RP100FAL
Indoor unit
No.OC331
REVISED EDITION-B
Remote controller
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
SPLIT-TYPE, AIR CONDITIONERS
Note:
•This manual describes only
service data of the indoor
units.
•RoHS compliant products
have <G> mark on the spec
name plate.
•For servicing of RoHS com-
pliant products, refer to the
RoHS Parts List.
Model name
indication
PKH-P60FALH PKH-P60FALH
PKH-P71FALH PKH-P71FALH
PKH-P100FALH PKH-P100FALH
May 2008
[Service Ref.]
PKA-RP50FAL2 PKA-RP50FAL2#1
PKA-RP60FAL PKA-RP60FAL#1
PKA-RP71FAL PKA-RP71FAL#1
PKA-RP100FAL PKA-RP100FAL#1
Revision:
•PKA-RP50~100FAL(2)#1
are added in REVISED
EDITION-B.
•Some descriptions have
been modified.
•Please void OC331
REVISED EDITION-A.

2
2REFERENCE MANUAL
2-1. OUTDOOR UNIT’S SERVICE MANUAL
2-2. TECHNICAL DATA BOOK
1TECHNICAL CHANGES
PKA-RP50FAL2 PKA-RP50FAL2#1
PKA-RP60FAL PKA-RP60FAL#1
PKA-RP71FAL PKA-RP71FAL#1
PKA-RP100FAL PKA-RP100FAL#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
3SAFETY PRECAUTION
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.
3-1. ALWAYS OBSERVE FOR SAFETY
Before obtaining access to terminal, all supply
circuits must be disconnected.

4
[3] Service tools
Use the below service tools as exclusive tools for R407C refrigerant.
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.
—
[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

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.
· For PR60/71VHA3 and RP100 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.
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
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

77
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
NOT AVAILABLE
CHECK TEST RUN
°C
AMPM
AMPM
VANE CONTROL button
Used to change the air flow direction.
CLOCK button
RESET button
SET 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.
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.
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
(Not available for this model)
4PART NAMES AND FUNCTIONS
Indoor Unit Air intake
Room air is suctioned
in here.
(Removes dust and dirt from the intake air.)
Disperses airflow up and
down as well as adjusts the
angle of air flow direction.
Filter Air intake grille
Air outletAir outlet
Swing louvers
Indicator lamp section
Air flow can be changed to horizontally
by moving the Guide vane to the left or
right.
Guide vane

8
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-High)
External static pressure
Operation control & Thermostat
Noise level(Low-High)
Unit drain pipe O.D.
Dimensions
Weight
W
D
H
INDOOR UNIT
PKA-RP71FAL,PKA-RP71FAL#1
Cooling
0.09
0.43
0.80
Heating
0.09
0.43
0.80
Single phase, 50Hz, 230V
Munsell 3.4Y 7.7/0.8
Plate fin coil
Line flow (direct) x 2
0.040
15-20(530-706)
0(direct blow)
Wireless remote controller & built-in
39-45
20(13/16)
1,400(55-1/8)
235(9-1/4)
340(13-3/8)
24(53)
Cooling
0.09
0.43
0.80
Heating
0.09
0.43
0.80
Single phase, 50Hz, 230V
Munsell 3.4Y 7.7/0.8
Plate fin coil
Line flow (direct) x 2
0.040
15-20(530-705)
0(direct blow)
Wireless remote controller & built-in
39-45
20(13/16)
1,400(55-1/8)
235(9-1/4)
340(13-3/8)
24(53)
PKA-RP50FAL2,PKA-RP50FAL2#1 / PKA-RP60FAL,PKA-RP60FAL#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-High)
External static pressure
Operation control & Thermostat
Noise level(Low-High)
Unit drain pipe O.D.
Dimensions
Weight
W
D
H
INDOOR UNIT
Cooling
0.11
0.52
0.90
Heating
0.11
0.52
0.90
Single phase, 50Hz, 230V
Munsell 3.4Y 7.7/0.8
Plate fin coil
Line flow (direct) x 2
0.070
22-28(780-990)
0(direct blow)
Wireless remote controller & built-in
41-46
26(1)
1,680(66-1/8)
235(9-1/4)
340(13-3/8)
28(62)
PKA-RP100FAL,PKA-RP100FAL#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-High)
External static pressure
Operation control & Thermostat
Noise level(Low-High)
Unit drain pipe O.D.
Dimensions
Weight
W
D
H
INDOOR UNIT

99
Single phase, 50Hz, 230V
Munsell 3.4Y 7.7/0.8
Plate fin coil
Line flow (direct) x 2
0.040
15-20 (530-706)
0(direct blow)
<1.93>
Wireless remote controller & built-in
39-45
20(13/16)
1,400(13/16)
235(9-1/4)
340(13-3/8)
26(57)
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-High)
External static pressure
Booster heater +1
Operation control & Thermostat
Noise level(Low-High)
Unit drain pipe O.D.
Dimensions
Weight
INDOOR UNIT
W
D
H
PKH-P60FALH
Cooling
0.09
0.43
0.80
Heating
0.09<1.93>
0.43<8.39>
0.80<8.39>
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-High)
External static pressure
Booster heater +1
Operation control & Thermostat
Noise level(Low-High)
Unit drain pipe O.D.
Dimensions
Weight
INDOOR UNIT
W
D
H
Cooling
0.09
0.43
0.80
Heating
0.09<1.93>
0.43<8.39>
0.80<8.39>
Single phase, 50Hz, 230V
Munsell 3.4Y 7.7/0.8
Plate fin coil
Line flow (direct) x 2
0.040
15-20 (530-706)
0(direct blow)
<1.93>
Wireless remote controller & built-in
39-45
20(13/16)
1,400(13/16)
235(9-1/4)
340(13-3/8)
26(57)
PKH-P71FALH
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-High)
External static pressure
Booster heater +1
Operation control & Thermostat
Noise level(Low-High)
Unit drain pipe O.D.
Dimensions
Weight
INDOOR UNIT
W
D
H
Single phase, 50Hz, 230V
Munsell 3.4Y 7.7/0.8
Plate fin coil
Line flow (direct) x 2
0.070
22-28(777-988)
0(direct blow)
<2.20>
Wireless remote controller & built-in
41-46
20(13/16)
1,680(66-1/8)
235(9-1/4)
340(13-3/8)
30(66)
PKH-P100FALH
Cooling
0.11
0.52
0.90
Heating
0.11<2.20>
0.52<9.57>
0.90<9.57>
+1 : < > Shows the only booster heater rating.

10
6NOISE CRITERION CURVES
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(0dB=0.0002 μbar)
BAND CENTER FREQUENCIES, Hz
PKA-RP50FAL2
PKA-RP50FAL2#1
PKA-RP60/71FAL
PKA-RP60/71FAL#1
PKH-P60/71FALH
High
Low
45
SPL(dB)
39
LINE
NOTCH
UNIT
WALL
1m
1m
MICROPHONE
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(0dB=0.0002 μbar)
BAND CENTER FREQUENCIES, Hz
PKA-RP100FAL
PKA-RP100FAL#1
PKH-P100FALH
High
NOTCH
Low
46
SPL(dB)
41
LINE

11
7OUTLINES AND DIMENSIONS
235
45
235
45
235
45
235
62.5
13
58 42
340
197
Top
Front Right side
Left side 1400
1090 Air intake
235
C
Knockout hole for right piping
Refrigerant pipe. Drain pipe
Knockout hole for
left piping
Drain hose for
left-hand side piping
Drain hose
Lower side
Auto vanes
(Gas pipe)
Drain hose O.D.20
Bolt
Gas pipe
15
(Liquid pipe)
Liquid pipe :9.52(3/8F)
Gas pipe :15.88(5/8F)
Liquid pipe
A
30
32
39
98
37
74
439
100
30
37
74
4
2980
280
3030
18430
60
10
39
37
65
100
AB C
Knockout hole for wiring
25
1110 183
240
B
1120
552
55
120
107
111
Air outlet
552 Air outlet
Louvers (manual)
Under panel
Removable at left-hand
side piping Knockout hole for under-piping
Refrigerant pipe. Drain pipe
Rear piping opening
Range for left rear piping opening
12-ø6 hole for
tapping screw
66-ø6 hole for
tapping screw
Wall fixture
Unit center
32-ø12 hole for bolt 225
18 18 91
900
990
455
285
245
19
240 280 314
610 90
Drainage range
on left-hand side
Drainage range
on right-hand side
10 91=(910)
180
Terminal block for heater (PKH only
)
Terminal block for indoor/outdoor connecting line
Display section
Receiving
section
Power lamp
Emergency switch(Heat)
Emergency switch(Cool)
Defrosting Initial heating lamp
GAS SIDE
LIQUID SIDE
RP50
:  6.35
:9.52
:  15.88
:  12.7
Use the current nuts meeting
the pipe size of the outdoor unit.
:Initial flare nut size
Available pipe size
:  9.52
:15.88
Sleeve
:90~ :100
Through hole
+ 1 Sleeves are availaable
on the market.
+1
:90
RP60,71 / P60,71
Unit : mm
PKA-RP50FAL2 PKA-RP50FAL2#1
PKH-P60FALH PKA-RP60FAL PKA-RP60FAL#1
PKH-P71FALH PKA-RP71FAL PKA-RP71FAL#1

12
Unit : mm
PKH-P100FALH PKA-RP100FAL PKA-RP100FAL#1
235
45
235
45
235
45
235
45
235
62.5
13
58 42
340
197
Top
Front
Right side
Display section
Receiving
section
Power lamp
Emergency switch(Heat)
Emergency switch(Cool)
Defrosting Initial heating lamp
Left side
1680
1370
Air intake
235
C
Knockout hole for right piping
Knockout hole for left piping
Drain hose for left-hand side piping
Drain hose
Drain hose
Lower side
Auto vane
(Gas pipe)
Bolt
Gas pipe
15
(Liquid pipe)
Liquid pipe
A
30
32
39
98
37
74
439
100
30
37
74
4
2980
280
3030
18430
60
10
39
37
65
100
AB C
Knockout hole for wiring
25
1110 183
240
B
1400
55
120
102
111
694
Air outlet
694
Air outlet
Louvers (manual)
Under panel
(Removable at left-hand side piping)
Knockout hole for under-piping
Refrigerant pipe. Drain pipe
Rear piping opening
Range for left rear piping openingRange for left rear piping opening
84-ø6 hole for
tapping screw
Wall fixture
Unit out line Unit center
41-ø12 hole for bolt
295 225
18 18
91
900
1270
595
285
245
19
240 280 314
750 90
Drainage range
on right-hand side
13 91=(1183)
180
Drainage range
on left-hand side
Terminal block for heater (PKH only)
Terminal block for indoor/outdoor connecting line
Drain hose O.D.20
: Initial flare nut size
GAS SIDE
LIQUID SIDE
Available pipe size
RP100
:9.52
:15.88
:19.05
P100
:9.52
:19.05

1313
8WIRING DIAGRAM
INTAKE
CN20
(
RED
)
LIQUID
CN21
(
WHT
)
PIPE
CN29
(
BLK
)
1 2 1 2 1 2
1 31 31 3 1 2
TH5TH1 TH2
REMOCON
CN22
(
BLU
)
1 2
2
1
TB5
R.B
TB6
2
1
TRANSMISSION WIRES DC12V
SWE
ON
OFF
SW2 SW1
LED3 LED2 LED1
ZNR
FUSE
X4
CN41 CN2L
CN51 CN32
WIRELESS
CN90
(
WHT
)
VANE
CN6V
(
GRN
)
MV
6
W.B
BZ CNB
RECEIVER
RU
LED1 LED2 SW2 SW1
9
FAN
(
WHT
)
1 3 5
1
1
2
1
2
3
2 3
BLK WHT WHT RED RED
C
MF
X4
BCR
TO
OUTDOOR
UNIT
TB4
S1
S2
S3
YLW
ORN
ORN
BRN
YLW ORN BLK WHT
P. B
I.B
Please set the voltage
using the remote controller.
For the setting method,
please refer to the indoor
unit Installation Manual
SW1
Table 1
Service board
SW2
Table 2
Service board Service board Service board
POWER
CNDK
(RED)
CNDK
(RED)
DC13.1V
CN2S
(WHT)
POWER
CND
(ORN) POWER
CN2D(WHT)
INDOOR/OUTDOOR
COMMUNICATION
CN3C(BLU)
3131
POWER
CND
(ORN)
INDOOR/OUTDOOR
COMMUNICATION
CN3C
(BLU)
TB2
TB4
POWER
SUPPLY
(1PHASE)
230V 50Hz
RED
BLU
YLW
ORN
ORN
BRN
TO
OUTDOOR
UNIT
L
S1
S2
S3
N
I.B
YLW
ORN
+ 1 (Fig.1)
Refer to tables 1
and 2 for service PCB.
1 2 3 4 5
ON
OFF
1 2 3 4 5
ON
OFF
MODELS
PKA-RP60FAL
PKH-P60FALH
PKA-RP50FAL2
1 2 3 4 5
ON
OFF
MODELS
PKA-RP71FAL
PKH-P71FALH
1 2 3 4 5
ON
OFF
MODELS
PKA-RP100FAL
PKH-P100FALH
TB2
I.B
HEATER
CN24
(YLW)
PKH-P60 P100FALH models only
POWER SUPPLY
(1PHASE)
230V 50Hz
88H
FS2
26H
H1
L
REDRED 5 3RED
BLU
GRN/YLW
WHT
RED
61 REDGRY
N
2
1
2
6
5
1
FS1
88H
YLW YLW
GRN/YLW
P. B INDOOR POWER BOARD
SYMBOL NAME
I.B INDOOR CONTROLLER BOARD
FUSE FUSE(T6.3AL250V)
ZNR VARISTOR
CN2L CONNECTOR(LOSSNAY)
CN32 CONNECTOR(REMOTE SWITCH)
CN41 CONNECTOR(HA TERMINAL-A)
CN51 CONNECTOR(CENTRALLY CONTROL)
SW1 SWITCH (MODEL SELECTION)
+ See Table 1.
SW2 SWITCH (CAPACITY CODE)
+ See Table 2.
SWE SWITCH(EMERGENCY OPERATION)
X4 RELAY(FAN MOTOR)
BCR
POWER SUPPLY(R.B)
LED1 POWER SUPPLY(I.B)
LED2
TRANSMISSION(INDOOR-OUTDOOR)LED3
FAN CONTROL ELEMENT
C CAPACITOR(FAN MOTOR)
FAN MOTOR
VANE MOTOR
MF
MV
SYMBOL NAME
TB4 TERMINAL BLOCK(INDOOR/OUTDOOR
TB2 TERMINAL BLOCK (HEATER)
+ PKH-P.FALH
models only or option for PKA-RP.FAL(2) models.
CONNECTING LINE)
TERMINAL BLOCK(REMOTE CONTROLLER
TRANSMISSION LINE )(OPTION)
ROOM TEMP.THERMISTOR
(0
 /15k  , 25  /5.4k  DETECT)
PIPE TEMP.THERMISTOR/LIQUID
(0
 /15k  , 25  /5.4k  DETECT)
COND./EVA.TEMP.THERMISTOR
(0
 /15k  , 25  /5.4k  DETECT)
TB5
TH5
TH1
TH2
W.B WIRELESS REMOTE CONTROLLER BOARD
RECEIVING UNIT
BUZZER
LED(RUN INDICATOR )
LED(HOT ADJUST)
SWITCH(HEATING ON/OFF)
SWITCH(COOLING ON/OFF)
WIREDREMOTE CONTROLLER BOARD(OPTION)
TERMINAL BLOCK(REMOTE CONTROLLER
THERMAL FUSE(117
 10A:60,71FALH/
117
 16A:100FALH)
TRANSMISSION LINE)
R.B
HEATER
RU
BZ
LED1
LED2
SW1
SW2
NAMESYMBOL
HEATER
H1
HEATER THERMAL SWITCH
26H
HEATER CONTACTOR
88H
TB6
FS1,2
NOTES:
1. Since the outdoor side electric wiring may change be sure to check the outdoor unit electric wiring for servicing.
2. Indoor and outdoor connecting wires are made with polarities, make wiring matching terminal numbers (S1, S2, S3).
3. Make sure that the main power supply of the booster heater is independent.
4. Symbols used in wiring diagram above are, : Connector, : Terminal (block).
+ 1. When work to supply power separately to Indoor and Outdoor unit was applied, refer to Fig 1.
+ 2. For power supply system of this unit, refer to the caution label located near this diagram.
PKA-RP50FAL2 PKA-RP60FAL PKA-RP71FAL PKA-RP100FAL
PKA-RP50FAL2#1 PKA-RP60FAL#1 PKA-RP71FAL#1 PKA-RP100FAL#1
PKH-P60FALH PKH-P71FALH PKH-P100FALH

14
9REFRIGERANT SYSTEM DIAGRAM
PKA-RP50FAL2 PKA-RP50FAL2#1
PKA-RP60FAL PKA-RP60FAL#1 PKH-P60FALH
PKA-RP71FAL PKA-RP71FAL#1 PKH-P71FALH
PKA-RP100FAL PKA-RP100FAL#1 PKH-P100FALH
Pipe temperature
thermistor/liquid
(TH2)
Distributor
with strainer
#50
Condenser/evaporator
temperature thermistor
(TH5)
Room temperature
thermistor (TH1)
Refrigerant flow in cooling
Refrigerant flow in heating
Strainer
#50
Strainer
#50
Heat exchanger
Refrigerant GAS pipe connection
(Flare)
Refrigerant LIQUID pipe connection
(Flare)

15
10 TROUBLESHOOTING
<Error code display by self-diagnosis and actions to be taken for service (summary)>
Present and past error codes are logged and displayed on the wired remote controller or controller board of outdoor unit.
Actions to be taken for service and the trouble reoccurrence at field are summarized in the table below. Check the contents
below before investigating details.
10-1. TROUBLESHOOTING
Unit conditions at service Error code Actions to be taken for service (summary)
The trouble is reoccurring.
Displayed
Not displayed
Judge what is wrong and take a corrective action
according to “SELF-DIAGNOSIS ACTION TABLE” (10-3).
Conduct troubleshooting and ascertain the cause of the
trouble according to “TROUBLESHOOTING
BY INFERIOR PHENOMENA ” (10-4).
The problem is not reoccurring.
Logged
Not logged
Consider the temporary defects such as the work of
protection devices in the refrigerant circuit including
compressor, poor connection of wiring, noise and etc.
Re-check the symptom, and check the installation
environment, refrigerant amount, weather when the
trouble occurred, matters related to wiring and etc.
Reset error code logs and restart the unit after finishing
service.
There is no abnormality in electrical component,
controller board, remote controller and etc.
Re-check the abnormal symptom.
Conduct troubleshooting and ascertain the cause of the
trouble according to “TROUBLESHOOTING
BY INFERIOR PHENOMENA ” (10-4).
Continue to operate unit for the time being if the cause
is not ascertained.
There is no abnormality concering of parts such as
electrical component, controller board, remote controller
and etc.

16
• "CHECK" lights, and refrigerant
address "00" flashes.
• Check that the remote controller's
display has stopped before continuing.
• Select the refrigerant address of the
indoor unit for the self-diagnosis.
Note: Set refrigerant address using the
outdoor unit’s DIP switch (SW1).
(For more information, see the
outdoor unit installation manual.)
• If an air conditioner error occurs, the
indoor unit's sensor emits an intermit-
tent buzzer sound, the operation light
flashes, and the error code is
output.
(It takes 3 seconds at most for error
code to appear.)
• The check mode is cancelled.
[Procedure]
1. Press the CHECK button twice.
2. Press the temperature
buttons.
3. Point the remote controller at the
sensor on the indoor unit and
press the HOUR button.
4. Point the remote controller at the
sensor on the indoor unit and
press the ON/OFF button.
<Malfunction-diagnosis method at maintenance service>
10-2. MALFUNCTION-DIAGNOSIS METHOD BY REMOTE CONTROLLER
<In case of trouble during operation>
When a malfunction occurs to air conditioner, both indoor unit and outdoor unit will stop and operation lamp blinks to inform
unusual stop.
ON/OFF TEMP
FAN
VANE
MODE
CHECK
LOUVER
TEST RUN
AUTO STOP
AUTO START
h
min
RESET
SET CLOCK
CHECK
CHECK
display
Temperature
button
CHECK
button
Refrigerant
address
display
HOUR
button
ON/OFF
button
To be continued to the next page.

17
[Output pattern A] Errors detected by indoor unit
[Output pattern B]
E9
*1 If the beeper does not sound again after the initial
2 beeps to confirm the self-check start signal was received and
the OPERATION INDICATOR lamp does not come on, there are no error records.
*2 If the beeper sounds 3 times continuously “beep, beep, beep (0.4 + 0.4 + 0.4 sec.)” after the initial 2 beeps to confirm
the self-check start signal was received, the specified refrigerant address is incorrect.
OPERATION
INDICATOR
lamp flash
pattern
Beep Beep Beep Beep Beep Beep Beep
Off
Approx. 2.5 sec.
On
Approx. 3 sec.
On
0.5 sec.
On
0.5 sec.
On
0.5 sec.
On
0.5 sec.
Off
Approx. 2.5 sec.
On
Approx. 3 sec.
On
0.5 sec.
On
0.5 sec.
· · · Repeated
Number of flashes/beeps in pattern indicates the check
code in the following table (i.e., n=5 for “U2”)
Number of flashes/beeps in pattern indicates
the check code in the following table
nth 1st 2nd 3rd 1st 2nd
Self-check
starts
(Start signal
received)
Beeper sounds
[Output pattern B]
OPERATION
INDICATOR
lamp flash
pattern
Beep Beep Beep Beep Beep Beep Beep
Off
Approx. 2.5 sec.
On
0.5 sec.
On
0.5 sec.
On
0.5 sec.
On
0.5 sec.
Off
Approx. 2.5 sec.
On
0.5 sec.
On
0.5 sec.
· · · Repeated
Number of flashes/beeps in pattern indicates the check
code in the following table (i.e., n=5 for “P5”)
Number of flashes/beeps in pattern indicates
the check code in the following table
nth 1st 2nd 3rd 1st 2nd
Self-check
starts
(Start signal
received)
Beeper sounds
• Refer to the following tables for details on the check codes.
[Output pattern A]
Beeper sounds/OPERATION
INDICATOR lamp flashes Check code Symptom Remark
(Number of times)
Wireless remote controller
Wired remote controller
Beeper sounds/OPERATION
INDICATOR lamp flashes Check code
(Number of times)
Wireless remote controller
Wired remote controller
1P1
Intake sensor error
P9 Pipe (TH5) sensor error
2P2 Pipe (TH2) sensor error
3E6,E7
Indoor/outdoor unit communication error
4 P4 Drain sensor error
5P5
PA
Drain pump error
Forced compressor stop(due to water leakage abnormality)
6 P6 Freezing/Overheating protection operation
7 EE Communication error between indoor and outdoor units
8 P8 Pipe temperature error
9 E4, E5 Remote controller signal receiving error
10 –
11 –
–
–
Errors detected by unit other than indoor unit (outdoor unit, etc.)
Symptom Remark
1Indoor/outdoor unit communication error
2
(Transmitting error) (Outdoor unit)
3Open/short of outdoor unit thermistors
4Compressor overcurrent interruption (When compressor locked)
5Abnormal high discharging temperature/49C worked/
insufficient refrigerant
6Abnormal high pressure (63H worked)/Overheating
protection operation
7Abnormal temperature of heat sink
8Outdoor unit fan protection stop
9Compressor overcurrent interruption/Abnormal of power module
10 Abnormality of super heat due to low discharge temperature
11 Abnormality such as overvoltage or voltage shortage and
abnormal synchronous signal to main circuit/Current sensor error
12
13
U2
U5
UP
U3,U4
UF
U1,Ud
U8
U6
U7
U9,UH
Others
–
–
–
–
14 Other errors (Refer to the technical manual for the outdoor unit.)
For details, check
the LED display
of the outdoor
controller board.
As for outdoor
unit, refer to
outdoor unit's
service manual.
12 Fb Indoor unit control system error (memory error, etc.)
–E0, E3
– E1, E2 Remote controller control board error
Remote controller transmission error
Compressor overcurrent interruption

18
•If the unit cannot be operated properly after test run, refer to the following table to find the cause.
Symptom Cause
Wired remote controller LED 1, 2 (PCB in outdoor unit)
On the wireless remote controller with condition above, following phenomena take place.
• No signals from the remote controller can be received.
• Operation lamp is blinking.
• The buzzer makes a short ping sound.
PLEASE WAIT
PLEASE WAIT →Error code
Display messages do not
appear even when operation
switch is turned ON (operation
lamp does not light up).
For about 2
minutes after
power-on
Subsequent to
about 2 minutes
after power-on
After LED 1, 2 are lighted, LED 2 is
turned off, then only LED 1 is
Only LED 1 is lighted. →
LED 1, 2 blink.
Only LED 1 is lighted. →
LED 1 blinks twice,
LED 2 blinks once.
•For about 2 minutes following power-on,op-
eration of the remote controller is not possible
due to system start-up. (Correct operation)
•Connector for the outdoor unit’s protection
device is not connected.
•Reverse or open phase wiring for the outdoor
unit’s power terminal block (L1, L2, L3)
•Incorrect wiring between indoor and outdoor
units (incorrect polarity of S1, S2, S3)
•Remote controller wire short
Note:
Operation is not possible for about 30 seconds after cancellation of function selection. (Correct operation)
For description of each LED (LED1, 2, 3) provided on the indoor controller, refer to the following table.
LED1 (power for microcomputer) Indicates whether control power is supplied. Make sure that this LED is
always lit.
LED2 (power for remote controller) Indicates whether power is supplied to the remote controller.
This LED lights only in the case of the indoor unit which is connected to the
outdoor unit refrigerant addresses “0”.
LED3 (communication between indoor and
outdoor units)
Indicates state of communication between the indoor and outdoor units.
Make sure that this LED is always blinking.
lighted. (Correct operation)
• On wireless remote controller
The continuous buzzer sounds from receiving section of indoor unit.
Blink of operation lamp
• On wired remote controller
Check code displayed in the LCD.

19
10-3. SELF-DIAGNOSIS ACTION TABLE Note: Refer to the manual of outdoor unit for the details of display
such as F, U, and other E.
Error Code
Abnormal point and detection method
Cause Countermeasure
P1
P2
P4
Drain sensor (DS)
1Suspensive abnormality, if short/open
of thermistor is detected for 30 seconds
continuously.Compressor and indoor fan
will be turned off
2Short/open is detected for 30 seconds
continuously during suspensive
abnormality.
(The unit returns to normal operation,
if it has normally reset.)
3Detect the following condition.
• During cooling and drying operation.
• In case that pipe <liquid> temperature -
room temperature <-10deg
(Except defrosting)
• When pipe <liquid> temperature or
room temperature is short/open
temperature.
• During drain pomp operation.
1Defective thermistor
characteristics
2Contact failure of connector
(CN31) on the indoor controller
board. (Insert failure).
3Breaking of wire or contact
failure of drain sensor wiring.
4Defective indoor controller board.
1–3Check resistance value of thermistor.
0:......6.0k"
10:....3.9k"
20:....2.6k"
30:....1.8k"
40:....1.3k"
2Check contact failure of connector (CN31) on
the indoor controller board. Refer to 10-7-1.
Turn the power on again and check restart
after inserting connector again.
4Replace indoor controller board if drain
pump operates with the line of drain sensor
connector CN31-1and 2is short-circuited,
and abnormality reappears.
Turn the power off, and on again to operate
after check.
P5
Malfunction of drain pump (DP)
1Suspensive abnormality, if thermistor
of drain sensor is let heat itself and
temperature rises slightly. Compressor
and indoor fan will be turned off.
2Drain pump is abnormal if the condition
above is detected during suspensive
abnormality.
3Constantly detected during drain pump
operation.
1Malfunction of drain pump
2Defective drain
Clogged drain pump
Clogged drain pipe
3Attached drop of water at the
drain sensor
• Drops of drain trickles from
lead wire.
• Clogged filter is causing
wave of drain.
4Defective indoor controller board.
1Check if drain-up machine works.
2Check drain function.
3Check the setting of lead wire of drain sensor
and check clogs of the filter.
4Replace indoor controller board if drain
pump operates with the line of drain sensor
connector CN31-1and 2is short-circuited
and abnormality reappears.
Refer to 10-7-1.
Turn the power off, and on again to operate
after check.
Room temperature thermistor (TH1)
1The unit is in 3-minute resume
prevention mode if short/open of
thermistor is detected. Abnormal if the
unit does not reset normally after 3 min-
utes. (The unit returns to normal opera-
tion, if it has been reset normally.)
2Constantly detected during cooling,
drying, and heating operation.
Short: -90:or more
Open: -40:or less
1Defective thermistor
characteristics
2Contact failure of connector
(CN20) on the indoor controller
board (Insert failure)
3Breaking of wire or contact
failure of thermistor wiring
4Defective indoor controller
board
1–3Check resistance value of thermistor.
0:15.0k"
10:9.6k"
20:6.3k"
30:4.3k"
40:3.0k"
If you put force on (draw or bend) the lead wire
with measuring resistance value of thermis-
tor, breaking of wire or contact failure can be
detected.
2Check contact failure of connector (CN20) on
the indoor controller board. Refer to 10-7-1.
Turn the power on again and check restart
after inserting connector again.
4Check room temperature display on remote
controller.
Replace indoor controller board if there is
abnormal difference with actual room
temperature.
Turn the power off, and on again to operate
after check.
Pipe temperature thermistor/Liquid
(TH2)
1The unit is in 3-minute resume
prevention mode if short/open of
thermistor is detected. Abnormal if the
unit does not reset normally after 3 min-
utes. (The unit returns to normal opera-
tion, if it has been reset normally.)
2Constantly detected during cooling,
drying, and heating (except defrosting)
operation
Short: 90:or more
Open: -40:or less
1Defective thermistor
characteristics
2Contact failure of connector
(CN44) on the indoor control-
ler board (Insert failure)
3Breaking of wire or contact
failure of thermistor wiring
4Defective refrigerant circuit is
causing thermistor tempera-
ture of 90:or more or -40:
or less.
5Defective indoor controller
board
1–3Check resistance value of thermistor.
For characteristics, refer to (P1) above.
2Check contact failure of connector (CN44) on
the indoor controller board. Refer to 10-7-1.
Turn the power on and check restart after
inserting connector again.
4Check pipe <liquid> temperature with remote
controller in test run mode. If pipe <liquid>
temperature is extremely low (in cooling
mode) or high (in heating mode), refrigerant
circuit may have defective.
5Check pipe <liquid> temperature with
remote controller in test run mode. If there is
extremely difference with actual pipe <liquid>
temperature, replace indoor controller board.
Turn the power off, and on again to operate
after check.

20
Error Code Abnormal point and detection method Cause Countermeasure
P6
Freezing/overheating protection is work-
ing
1Freezing protection (Cooling mode)
The unit is in 6-minute resume preven-
tion mode if pipe <liquid or condenser/
evaporator> temperature stays under
-15:for 3 minutes, 3 minutes after the
compressor started. Abnormal if it stays
under -15:for 3 minutes again within
16 minutes after 6-minute resume pre-
vention mode.
2Overheating protection (Heating mode)
The units is in 6 minute resume
prevention mode if pipe <condenser /
evaporator> temperature is detected as
over 70:after the compressor started.
Abnormal if the temperature of over
70:is detected again within 30 minutes
after 6 minute resume prevention mode.
P8
1Slight temperature difference
between indoor room
temperature and pipe <liquid
or condenser / evaporator>
temperature thermistor
• Shortage of refrigerant
• Disconnected holder of pipe
<liquid or condenser /
evaporator> thermistor
• Defective refrigerant circuit
2Converse connection of
extension pipe (on plural units
connection)
3Converse wiring of indoor/
outdoor unit connecting wire
(on plural units connection)
4Defective detection of indoor
room temperature and pipe
<condenser / evaporator>
temperature thermistor
5Stop valve is not opened
completely.
(Cooling or drying mode)
1Clogged filter (reduced airflow)
2Short cycle of air path
3Low-load (low temperature)
operation out of the tolerance
range
4Defective indoor fan motor
• Fan motor is defective.
• Indoor controller board is defec-
tive.
5Defective outdoor fan control
6Overcharge of refrigerant
7Defective refrigerant circuit
(clogs)
(Heating mode)
1Clogged filter (reduced airflow)
2Short cycle of air path
3Over-load (high temperature)
operation out of the tolerance
range
4Defective indoor fan motor
• Fan motor is defective.
• Indoor controller board is defec-
tive.
5Defective outdoor fan control
6Overcharge of refrigerant
7Defective refrigerant circuit
(clogs)
8Bypass circuit of outdoor unit
is defective.
(Cooling or drying mode)
1Check clogs of the filter.
2Remove shields.
4Refer to 10-7-1.
5Check outdoor fan motor.
67 Check operating condition of refrigerant
circuit.
(Heating mode)
1Check clogs of the filter.
2Remove shields.
4Refer to 10-7-1.
5Check outdoor fan motor.
6~8Check operating condition of refrigerant
circuit.
Pipe temperature
<Cooling mode>
Detected as abnormal when the pipe tem-
perature is not in the cooling range 3 min-
utes after compressor start and 6 minutes
after the liquid or condenser/evaporator
pipe is out of cooling range.
Note 1) It takes at least 9 minutes to
detect.
Note 2) Abnormality P8 is not detected in
drying mode.
Cooling range : -3 °C ] (TH-TH1)
TH: Lower temperature between: liquid
pipe temperature (TH2) and condens-
er/evaporator temperature (TH5)
TH1: Intake temperature
<Heating mode>
When 10 seconds have passed after the
compressor starts operation and the hot
adjustment mode has finished, the unit is
detected as abnormal when condenser/
evaporator pipe temperature is not in heat-
ing range within 20 minutes.
Note 3) It takes at least 27 minutes to
detect abnormality.
Note 4) It excludes the period of defrosting.
(Detection restarts when defrosting
mode is over.)
Heating range : 3 °C [ (TH5-TH1)
1~4 Check pipe <liquid or condenser / evapo-
rator> temperature with room tempera-
ture display on remote controller and
outdoor controller circuit board.
Pipe <liquid or condenser / evaporator>
temperature display is indicated by set-
ting SW2 of outdoor controller circuit
board as follows.
23Check converse connection of extension
pipe or converse wiring of indoor/outdoor
unit connecting wire.
Conduct temperature check with outdoor
controller circuit board after connecting
‘A-Control Service Tool(PAC-SK52ST)’.
()