Mitsubishi OC330B Service Manual

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
SPLIT-TYPE, AIR CONDITIONERS

SERVICE MANUAL

May 2008

No.OC330

REVISED EDITION-B

Indoor unit
[Model names]

PKA-RP35GAL

PKA-RP50GAL

PKH-P35GALH
PKH-P50GALH

[Service Ref.]

PKA-RP35GAL
PKA-RP35GAL#1
PKA-RP50GAL
PKA-RP50GAL#1

PKH-P35GALH
PKH-P50GALH

Indoor unit

Model name
indication

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.

CONTENTS

1. TECHNICAL CHANGES

2. REFERENCE MANUAL

3. SAFETY PRECAUTION

4. PART NAMES AND FUNCTIONS

5. SPECIFICATIONS

6. NOISE CRITERION CURVES

7. OUTLINES AND DIMENSIONS

8. WIRING DIAGRAM

9.

REFRIGERANT SYSTEM DIAGRAM

10. TROUBLE SHOOTING

11. SPECIAL FUNCTION

12. DISASSEMBLY PROCEDURE

13. PARTS LIST

14. RoHS PARTS LIST

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.

2
2
3

7

9

11

12

13
14
15

30

33
37
40

Remote controller

1

TECHNICAL CHANGES

PKA-RP35GAL PKA-RP35GAL#1
PKA-RP50GAL PKA-RP50GAL#1

INDOOR CONTROLLER BOARD(I.B.) has been changed.

2

REFERENCE MANUAL

2-1. OUTDOOR UNIT’S SERVICE MANUAL

Service Ref. Service Manual No.

PUHZ-RP35/50/60/71/100/125/140VHA
PUHZ-RP100/125/140YHA
PUHZ-RP71/100/125/140VHA

(1)

(1)(2)

(1)

.UK

PUHZ-RP200/250YHA
PUHZ-RP200/250YHA
PU(H)-P • VGAA.UK
PU(H)-P • YGAA.UK
PUHZ-P100/125/140VHA.UK OC359
PUHZ-RP35/50/60/71/100/125/140VHA2
PUHZ-RP100/125/140YHA2
PUHZ-RP35/50/60/71/100VHA3
PUHZ-RP100YHA3
PU(H)-P71/100VHA
PU(H)-P100/125/140YHA
PUHZ-P100/125/140VHA2
PUHZ-RP71/100/125/140VHA2-A
PUHZ-RP100/125/140YHA2-A
PUHZ-BP100/125/140VHA-A
PUHZ-BP200/250YHA-A
PUHZ-P200/250YHA2 OCH424 / OCB424
PUHZ-HRP71/100VHA
PUHZ-HRP100/125YHA
PUHZ-RP200/250YHA2 OCH428 / OCB428

(1)

-A OC337

-A OC339

(1)

(1)

.UK

(1)

.UK OCH415 / OCB415

(1)

(1)

OC334

OC338

OC336

OC374

OC379

OCH422 / OCB422

OCH423 / OCB423

OCH425 / OCB425

2-2. TECHNICAL DATA BOOK

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

2

3

SAFETY PRECAUTION

3-1. ALWAYS OBSERVE FOR SAFETY

Before obtaining access to terminal, all supply
circuits must be disconnected.

3-2. CAUTIONS RELATED TO NEW REFRIGERANT

Cautions for units utilizing refrigerant R407C

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.

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.

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.

Ventilate the room if refrigerant leaks during
operation. If refrigerant comes into contact with
a flame, poisonous gases will be released.

3

[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.

[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)

Unit

Gravimeter

(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.

[3] Service tools

Use the below service tools as exclusive tools for R410A refrigerant.

No. Tool name Specifications

·Only for R407C.

Gauge manifold

1

Charge hose

2

Electronic scale

3

Gas leak detector ·Use the detector for R134a or R407C.

4

Adapter for reverse flow check. ·Attach on vacuum pump.

5

Refrigerant charge base.

6

Refrigerant cylinder.

7

Refrigerant recovery equipment.

8

·Use the existing fitting SPECIFICATIONS. (UNF7/16)

·Use high-tension side pressure of 3.43MPa·G or over.

·Only for R407C.

·Use pressure performance of 5.10MPa·G or over.

·For R407C ·Top of cylinder (Brown)

·Cylinder with syphon

4

CAUTIONS RELATED TO NEW REFRIGERANT

Cautions for units utilizing refrigerant R410A

Use new refrigerant pipes.

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.

Make sure that the inside and outside of refrige­rant 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.

Contamination inside refrigerant piping can cause deterio­ration of refrigerant oil etc.

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.)

If dirt, dust or moisture enter into refrigerant cycle, that can
cause deterioration of refrigerant oil or malfunction of com­pressor.

Use ester oil, ether oil or alkylbenzene oil (small
amount) as the refrigerant oil applied to flares
and flange connections.

If large amount of mineral oil enter, that can cause deterio­ration of refrigerant oil etc.

Do not use refrigerant other than R410A.

If other refrigerant (R22 etc.) is used, chlorine in refrige­rant 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.

Tools for R410A
Gauge manifold
Charge hose

Gas leak detector

Torque wrench

Flare tool
Size adjustment gauge

Vacuum pump adaptor
Electronic refrigerant
charging scale

Keep the tools with care.

If dirt, dust or moisture enter into refrigerant cycle, that can
cause deterioration of refrigerant oil or malfunction of com­pressor.

Do not use a charging cylinder.

If a charging cylinder is used, the composition of refrigera­nt will change and the efficiency will be lowered.

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.

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.)

5

Unit

Gravimeter

[3] Service tools

Use the below service tools as exclusive tools for R410A refrigerant.

No. Tool name Specifications

·Only for R410A

1

Gauge manifold

2

Charge hose

3

Electronic scale

4

Gas leak detector ·Use the detector for R134a, R407C or R410A.

5

Adaptor for reverse flow check ·Attach on vacuum pump.

6

Refrigerant charge base

7

Refrigerant cylinder

8

Refrigerant recovery equipment

·Use the existing fitting

·Use high-tension side pressure of 5.3MPa·G or over.

·Only for R410A

·Use pressure performance of 5.09MPa·G or over.

·Only for R410A ·Top of cylinder (Pink)

·Cylinder with syphon

specifications

. (UNF1/2)

6

4 PART NAMES AND FUNCTIONS

Indoor Unit

Air intake

Guide vane

Filter

Air outlet

Air intake grille

Auto vane

77

Wireless remote controller

When cover is open.

CHECK

TEST RUN

display

CHECK&TEST RUN display indicates that
the unit is being checked or test-run.

MODEL SELECT

Blinks when model is selected.

display

display

Lights up while transmission to the indoor
unit is mode using switches.

display

SET TEMP. display indicates desired
temperature set.

display

OPERATION MODE display
Operation mode display indicates which
operation mode is in effect.

display

The vertical direction of air flow is indicated.

display

FAN SPEED display indicates which fan
speed has been selected.

ON/OFF button

The unit is turned ON and OFF alternately
each time the button is pressed.

FAN SPEED SELECT button

Used to change the fan speed.

MODE SELECT button

Used to switch the operation mode between

cooling, drying, heating and auto mode.

+ In case the outdoor unit is cool only type,

the heating and auto mode not available.

CHECK-TEST RUN button

Only press this button to perform an
inspection check or test operation.
Do not use it for normal operation.

CHECK

TEST RUN

MODEL SELECT

NOT AVAILABLE

ON/OFF TEMP

FAN

MODE

CHECK

VAN E

LOUVER

TEST RUN

RESETSET CLOCK

°C

AMPM

AMPM

AUTO STOP

AUTO START

h

min

CLOCK display

Displays the current time.

TIMER display

Displays when in timer operation or when
setting timer.

“ ” “ ” display

Displays the order of timer operation.

“ ” “ ” display

Displays whether timer is on or off.

button

SET TEMPERATURE button sets any desired
room temperature.

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.

h and min buttons

Buttons used to set the “hour and minute” of
the current time and timer settings.

LOUVER button

Changes left/right airflow direction.

(Not available for this model.)

VANE CONTROL button

Used to change the air flow direction.

CLOCK button

RESET button

SET buttonCLOCK button

8

5

SPECIFICATIONS

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

External static pressure

INDOOR UNIT

Operation control & Thermostat
Noise level(Low-Medium2-Medium1-High)
Unit drain pipe O.D.
Dimensions

Weight

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

External static pressure

INDOOR UNIT

Operation control & Thermostat
Noise level(Low-Medium2-Medium1-High)
Unit drain pipe O.D.
Dimensions

Weight

Airflow(Low-Medium2-Medium1-High)

W

D
H

Airflow(Low-Medium2-Medium1-High)

W

D
H

kW

A
A

kW

*/min(CFM)

Pa(mmAq)

dB
mm(in.)
mm(in.)
mm(in.)
mm(in.)

kg(lbs)

kW

A
A

kW

*/min(CFM)

Pa(mmAq)

dB
mm(in.)
mm(in.)
mm(in.)
mm(in.)

kg(lbs)

PKA-RP35GAL, PKA-RP35GAL#1

Cooling

Single phase, 50Hz, 230V

0.07

0.33

0.40
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

Cooling

Single phase, 50Hz, 230V

0.07

0.33

0.40
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)

Heating

0.07

0.33

0.40

Heating

0.07

0.33

0.40

99

Service Ref.

y

y

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

External static pressure

INDOOR UNIT

Booster heater +1
Operation control & Thermostat
Noise level(Low-Medium2-Medium1-High)
Unit drain pipe O.D.
Dimensions

Weight

+1 : < > Shows the onl

Airflow(Low-Medium2-Medium1-High)

W

D
H

booster heater rating.

kW

A
A

kW

*/min(CFM)

Pa(mmAq)

kW

dB
mm(in.)
mm(in.)
mm(in.)
mm(in.)

kg(lbs)

Cooling

PKH-P35GALH

Single phase, 50Hz, 230V

0.07

0.33

0.40
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)

Heating

0.07<0.73>

0.33<3.17>

0.40<3.17>

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

External static pressure

INDOOR UNIT

Booster heater +1
Operation control & Thermostat
Noise level(Low-Medium2-Medium1-High)
Unit drain pipe O.D.
Dimensions

Weight

+1 : < > Shows the onl

Airflow(Low-Medium2-Medium1-High)

W

D
H

booster heater rating.

kW

A
A

kW

*/min(CFM)

Pa(mmAq)

kW

dB
mm(in.)
mm(in.)
mm(in.)
mm(in.)

kg(lbs)

Cooling

PKH-P50GALH

Single phase, 50Hz, 230V

0.07

0.33

0.40
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)

Heating

0.07<0.73>

0.33<3.17>

0.40<3.17>

10

6 NOISE CRITERION CURVES

PKA-RP35/50GAL
PKA-RP35/50GAL#1
PKH-P35/50GALH

90

80

70

60

50

40

30

OCTAVE BAND SOUND PRESSURE LEVEL, dB (0dB=0.0002 μbar)

20

10

APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

63 125 250 500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

NOTCH

High
Medium1
Medium2

Low

SPL(dB)

43
41
38
36

LINE

NC-70

NC-60

NC-50

NC-40

NC-30

NC-20

UNIT

1m

1m

MICROPHONE

WALL

1111

7

OUTLINES AND DIMENSIONS

INDOOR UNIT
PKH-P35GALH PKA-RP35GAL PKA-RP35GAL#1
PKH-P50GALH PKA-RP50GAL PKA-RP50GAL#1

Knockout hole for right piping

Refrigerant pipe.Drain pipe.

Wiring hole

21

198

Air intake

70

r.SLI

MITSUBISHI ELECTRIC

mm

COOL HEAT

ON STAND

OFF BY

60

235

Auto vane

990

Knockout hole for under piping

Refrigerant piping.Drain pipe.

Wiring hole

60

235

160 40

Air outlet

705

70 35

80

12-Louvers(manual)

Service panel

(Power supply access)

190

395400

Less than 15

Right side

Air intake

Air intake

715 225

Air intake

340 80 280 233

245

Terminal block for

Terminal block to

outdoor unit

Filter grip

Unit : mm

Gas pipe

power supply (Heater (PKH-P35, 50GALH only))

31 280

installation)

(Right side piping

153

86

581 54

449

(Flexible hose total length800)

700

Refigerant Pipe flared connection

For R410A : 1/2F(:12.7)

For R407C : 5/8F(:15.88)

Liquid pipe

Refigerant Pipe flared connection

For R410A : 1/4F(:6.35)

For R407C : 3/8F(:9.52)

Model

RP35, 50

P35, 50 3/8F(:9.52) 5/8F(:15.88)

Front view

Left side

50

Less than 130

180 or more 30 or more

(Necessary clearance for

Unit installation)

Unit center

Installation plate

balance point hole

50 or more 150 or more

Front view(to open the grille)

190

R52.5

230

R52.5

272

R52.5

310

322

495

345
320

260

205

150

95

35
0

20
32
75

135

190

245

300

360

405

495

0355580130

0

R52.5

(Left side piping

0

60

Lower side

Right side

79

I
L
r.S

MITSUBISHI ELECTRIC

mm

HEATCOOL

BYOFF

ON STAND

Refrigerant pipe.Drain pipe.Wiring hole.

Allowing clearances

Front view

53

340

21

245

70

Knockout hole for left piping

Gas pipe

Liquid pipe

installation)

35

425

Unit drain pipe O.D.20

190
170

Right-rear

piping hole

Through hole

210
230

Sleeve +1

Knockout hole for

right-rear piping

420

Model

+1 Sleeves are available on the market.

+2 This size shows the lower end of through hole.

:90~:100:90

35, 50

Details of installation plate

Left-rear

for bolts

14-:14hole

49-:5hole

for tapping screw

piping hole

left-rear piping

Knockout hole for

12

8

WIRING DIAGRAM

PKH-P35GALH PKA-RP35GAL PKA-RP35GAL#1
PKH-P50GALH PKA-RP50GAL PKA-RP50GAL#1

1

I.B

YLW

MF

1

2 3

C

WHT

RED

I.B

1 3 5

FAN

(

)

WHT

BCR

SW2 SW1

SWE

ON
OFF

Refer to tables 1
and 2 for service PCB.

HEATER

CN24

2

(YLW)

YLW

61

88H

6
5

P. B

CNDK
(RED)

1
2

DC13.1V

CN2S

(WHT)

1
2

3

BLK

X4

X4

POWER

CNDK
(RED)

WHT

RED

POWER

CND

(ORN)

LED3 LED2 LED1

YLW

ZNR

INTAKE
CN20

(

RED

1 2

ORN

BLK

POWER
CN2D(WHT)

FUSE

CN41 CN2L

CN51 CN32

LIQUID
CN21

(

)

WHT

1 2

WHT

)

TH2

PKH-P35,50GALH models only

88H

GRN/YLW

REDRED 5 3RED
BLU

1
2

RED
REDGRY

26H

FS2

FS1

H1

WHT

TB4

YLW
ORN
ORN
BRN

VANE

1 31 31 3 1 2

)

TH5TH1

L
N

CN6V

(

)

GRN

WIRELESS
CN90

(

)

WHT

REMOCON
CN22

(

)

BLU

1 2

2

1

POWER SUPPLY
~(1PHASE)
230V 50Hz

INDOOR/OUTDOOR
COMMUNICATION
CN3C(BLU)

PIPE
CN29

(

BLK

1 2

TB2

+1 (Fig.1)

S1

TO

S2

OUTDOOR

S3

UNIT

YLW

MV

I.B

POWER

CND

(ORN)

9

6

TRANSMISSION WIRES DC12V

TB5

Please set the voltage using the
remote controller.
For the setting method,please refer to
the indoor unit Installation Manual.

RED

BLU

GRN/YLW

YLW

ORN
ORN

ORN

BRN

3131

INDOOR/OUTDOOR

COMMUNICATION

CN3C

(BLU)

BZ

RU

RECEIVER

LED1 LED2 SW2 SW1

TB2

TB4

R.B

L
N

S1

S2

S3

POWER
SUPPLY
~(1PHASE)
230V 50Hz

TO
OUTDOOR
UNIT

CNB

W.B

1
2

TB6

SW1

Service board

1 2 3 4 5

SYMBOL NAME
P. B
I.B

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
LED1 POWER SUPPLY <I.B>
LED2

ON
OFF

INDOOR POWER BOARD
INDOOR CONTROLLER BOARD

FAN CONTROL ELEMENT

POWER SUPPLY <R.B>
TRANSMISSION <INDOOR-OUTDOOR>LED3

MODELS

PKA-RP35GAL
PKH-P35GALH

Service board Service board

1 2 3 4 5

SYMBOL NAME
C CAPACITOR <FAN MOTOR>
MF
MV
TB2

TB4

TB5,TB6

TH1

TH2

TH5

SW2

MODELS

PKA-RP50GAL

ON

PKH-P50GALH

OFF

FAN MOTOR
VANE MOTOR
TERMINAL BLOCK (HEATER) +PKH-P.GALH

models only or option for PKA-RP.GAL models.
TERMINAL BLOCK <INDOOR/ OUTDOOR

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>

1 2 3 4 5

W.B

R.B
HEATER

ON
OFF

WIRELESS REMOTE CONTROLLER BOARD
RECEIVING UNIT

RU
BZ

BUZZER

LED1

LED <RUN INDICATOR>

LED2

LED <HOT ADJUST>

SW1

SWITCH (HEATING ON/ OFF>

SW2

SWITCH (COOLING ON/ OFF>
WIRED REMOTE CONTROLLER BOARD

THERMAL FUSE <10410A>

FS1

THERMAL FUSE <8410A>

FS2

HEATER

H1

HEATER THERMAL SWITCH

26H

HEATER CONTACTOR

88H

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.

NAMESYMBOL

13

9

REFRIGERANT SYSTEM DIAGRAM

PKH-P35GALH PKA-RP35GAL PKA-RP35GAL#1
PKH-P50GALH PKA-RP50GAL PKA-RP50GAL#1

Strainer
#50

Heat exchanger

Refrigerant GAS pipe connection
(Flare)

Condenser/evaporator
temperature thermistor
(TH5)

Refrigerant LIQUID pipe connection
(Flare)

Pipe temperature

Room temperature
thermistor (TH1)

Distributor
with strainer
#50

thermistor/liquid
(TH2)

Strainer
#50

Refrigerant flow in cooling
Refrigerant flow in heating

14

10 TROUBLESHOOTING

10-1. 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.

Unit conditions at service

The trouble is reoccurring.

The problem is not reoccurring.

Error code

Displayed

Not displayed

Logged

Not logged

Actions to be taken for service (summary)

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).

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.

15

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.

<Malfunction-diagnosis method at maintenance service>

[Procedure]

CHECK
display

ON/OFF
button

CHECK
button

ON/OFF

MODE

CHECK

TEST RUN

SET

CHECK

FAN

VAN E

LOUVER

RESET

TEMP

AUTO STOP

AUTO START

CLOCK

h

min

Refrigerant
address
display

Temperature
button

HOUR
button

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.

• "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.)

4. Point the remote controller at the
sensor on the indoor unit and
press the ON/OFF button.

• The check mode is cancelled.

16

To be continued to the next page.

• Refer to the following tables for details on the check codes.
[Output pattern A]

Beeper sounds

OPERATION
INDICATOR
lamp flash
pattern

Beep

Self-check
starts
(Start signal
received)

Beep Beep Beep Beep Beep Beep

1st2nd3

Off

Approx. 2.5 sec.On0.5 sec.On0.5 sec.On0.5 sec.

Number of flashes/beeps in pattern indicates the check
code in the following table (i.e., n=5 for “P5”)

rd

0.5 sec.

n

On

th

[Output pattern B]

Beeper sounds

OPERATION
INDICATOR
lamp flash
pattern

Beep Beep Beep Beep Beep Beep Beep

1st2nd3

Off

Self-check
starts
(Start signal
received)

Approx. 2.5 sec.OnApprox. 3 sec.On0.5 sec.On0.5 sec.On0.5 sec.

Number of flashes/beeps in pattern indicates the check
code in the following table (i.e., n=5 for “U2”)

[Output pattern A] Errors detected by indoor unit

Wireless remote controller

Wired remote controller

Beeper sounds/OPERATION

INDICATOR lamp flashes Check code

(Number of times)

1P1

2

P2 Pipe (TH2) sensor error
P9 Pipe (TH5) sensor error

3E6,E7

Intake sensor error

Indoor/outdoor unit communication error

4 P4 Drain sensor error

5

P5
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

–

–

–

–

12 Fb Indoor unit control system error (memory error, etc.)

–

E0, E3

Remote controller transmission error
– E1, E2 Remote controller control board error

nd

1st2

Off

Approx. 2.5 sec.On0.5 sec.On0.5 sec.

Number of flashes/beeps in pattern indicates
the check code in the following table

rd

th

n

On

0.5 sec.

Off

Approx. 2.5 sec.OnApprox. 3 sec.On0.5 sec.On0.5 sec.

Symptom Remark

··· Repeated

nd

1st2

Number of flashes/beeps in pattern indicates
the check code in the following table

· · · Repeated

[Output pattern B]

Wireless remote controller

Beeper sounds/OPERATION

INDICATOR lamp flashes Check code

Errors detected by unit other than indoor unit (outdoor unit, etc.)

Wired remote controller

Symptom Remark

(Number of times)

1

2
3
4

5

6

7
8
9

10

11

12
13
14

E9

UP
U3,U4
UF

U2

U1,Ud

U5
U8
U6
U7

U9,UH

–
–

Others

*1 If the beeper does not sound again after the initial

the OPERATION INDICATOR lamp does not come on,

Indoor/outdoor unit communication error
(Transmitting error) (Outdoor unit)

Compressor overcurrent interruption
Open/short of outdoor unit thermistors
Compressor overcurrent interruption (When compressor locked)
Abnormal high discharging temperature/49C worked/

insufficient refrigerant
Abnormal high pressure (63H worked)/Overheating

protection operation

Abnormal temperature of heat sink

Outdoor unit fan protection stop

Compressor overcurrent interruption/Abnormal of power module
Abnormality of super heat due to low discharge temperature
Abnormality such as overvoltage or voltage shortage and

abnormal synchronous signal to main circuit/Current sensor error

–
–

Other errors (Refer to the technical manual for the outdoor unit.)

2 beeps to confirm the self-check start signal was received and

there are no error records.

For details, check
the LED display
of the outdoor
controller board.
As for outdoor
unit, refer to
outdoor unit's
service manual.

*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.

17

• 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.

If the unit cannot be operated properly after test run, refer to the following table to find the cause.

•

Symptom

Wired remote controller LED 1, 2 (PCB in outdoor unit)

PLEASE WAIT

PLEASE WAIT → Error code

Display messages do not
appear even when operation
switch is turned ON (operation
lamp does not light up).

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.

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

LED2 (power for remote controller)

LED3 (communication between indoor and
outdoor units)

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
lighted.

(Correct operation)

Only LED 1 is lighted. →

Only LED 1 is lighted.

always lit.
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”.

Indicates state of communication between the indoor and outdoor units.
Make sure that this LED is always blinking.

LED 1, 2 blink.

→

LED 1 blinks twice,
LED 2 blinks once.

•For about 2 minutes following power-on,op­eration 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

Cause

18

10-3. SELF-DIAGNOSIS ACTION TABLE

Error Code

P1

P2

Abnormal point and detection method

Room temperature thermistor (TH1)

1 The 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 min­utes. (The unit returns to normal opera­tion, if it has been reset normally.)

2 Constantly detected during cooling,
drying, and heating operation.
Short: -90: or more
Open: -40: or less

Pipe temperature thermistor/Liquid
(TH2)

1

The 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 min­utes. (The unit returns to normal opera­tion, if it has been reset normally.)

2 Constantly detected during cooling,
drying, and heating (except defrosting)

operation

Short: 90: or more
Open: -40: or less

1 Defective thermistor
characteristics

2 Contact failure of connector

3 Breaking of wire or contact

failure of thermistor wiring

4 Defective indoor controller

1 Defective thermistor

characteristics

2 Contact failure of connector

3 Breaking of wire or contact

failure of thermistor wiring

4 Defective refrigerant circuit is

5 Defective indoor controller

Note: Refer to the manual of outdoor unit for the details of display
such as F, U, and other E.

Cause

(CN20) on the indoor controller
board (Insert failure)

board

(CN44) on the indoor control­ler board (Insert failure)

causing thermistor tempera­ture of 90: or more or -40:
or less.

board

Countermeasure

1–3 Check resistance value of thermistor.

If you put force on (draw or bend) the lead wire
with measuring resistance value of thermis­tor, breaking of wire or contact failure can be
detected.

2 Check contact failure of connector (CN20) on

4 Check room temperature display on remote

Replace indoor controller board if there is

temperature.

Turn the power off, and on again to operate
after check.

1–3 Check resistance value of thermistor.
For characteristics, refer to (P1) above.

2 Check contact failure of connector (CN44) on

4 Check pipe <liquid> temperature with remote

5 Check pipe <liquid> temperature with

....

0:

15.0k"

....

10:

9.6k"

....

20:

6.3k"

....

30:

4.3k"

....

40:

3.0k"

the indoor controller board. Refer to 10-7-1.
Turn the power on again and check restart
after inserting connector again.

controller.

abnormal difference with actual room

the indoor controller board. Refer to 10-7-1.
Turn the power on and check restart after
inserting connector again.

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.

remote controller in test run mode. If there is
extremely difference with actual pipe <liquid>
temperature, replace indoor controller board.

P4

P5

Drain sensor (DS)

1 Suspensive abnormality, if short/open

of thermistor is detected for 30 seconds
continuously.Compressor and indoor fan
will be turned off

2 Short/open is detected for 30 seconds

continuously during suspensive
abnormality.
(The unit returns to normal operation,
if it has normally reset.)
3 Detect 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.

Malfunction of drain pump (DP)

1 Suspensive abnormality, if thermistor
of drain sensor is let heat itself and
temperature rises slightly. Compressor

and indoor fan will be turned off.

2 Drain pump is abnormal if the condition

above is detected during suspensive
abnormality.

3 Constantly detected during drain pump

operation.

1 Defective thermistor
characteristics
2 Contact failure of connector

(CN31) on the indoor controller
board. (Insert failure).

3 Breaking of wire or contact
failure of drain sensor wiring.

4 Defective indoor controller board.

1 Malfunction of drain pump
2 Defective drain

Clogged drain pump
Clogged drain pipe
3 Attached drop of water at the

drain sensor

• Drops of drain trickles from
lead wire.

• Clogged filter is causing
wave of drain.

4 Defective indoor controller board.

Turn the power off, and on again to operate
after check.

1–3 Check resistance value of thermistor.

....

0:

6.0k"

....

10:

3.9k"

....

20:

2.6k"

....

30:

1.8k"

....

40:

1.3k"

2 Check 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.

4 Replace indoor controller board if drain
pump operates with the line of drain sensor

connector CN31-1 and 2 is short-circuited,
and abnormality reappears.

Turn the power off, and on again to operate
after check.

1 Check if drain-up machine works.
2 Check drain function.
3 Check the setting of lead wire of drain sensor

and check clogs of the filter.

4 Replace indoor controller board if drain
pump operates with the line of drain sensor

connector CN31-1 and 2 is short-circuited
and abnormality reappears.

Refer to 10-7-1.

Turn the power off, and on again to operate
after check.

19

Error Code

Abnormal point and detection method

Freezing/overheating protection is work­ing

1 Freezing protection (Cooling mode)

The unit is in 6-minute resume preven­tion 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 pre­vention mode.

Cause

(Cooling or drying mode)

1 Clogged filter (reduced airflow)
2 Short cycle of air path
3 Low-load (low temperature)

operation out of the tolerance
range

4 Defective indoor fan motor

• Fan motor is defective.

• Indoor controller board is defec­tive.

Countermeasure

(Cooling or drying mode)
1 Check clogs of the filter.

Remove shields.

2

4 Refer to 10-7-1.

P6

P8

2 Overheating 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.

Pipe temperature

<Cooling mode>
Detected as abnormal when the pipe tem­perature is not in the cooling range 3 min­utes 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 condens­er/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 heat­ing range within 20 minutes.

5 Defective outdoor fan control
6 Overcharge of refrigerant
7 Defective refrigerant circuit

(clogs)

(Heating mode)

1 Clogged filter (reduced airflow)
2 Short cycle of air path
3 Over-load (high temperature)

operation out of the tolerance
range

4 Defective indoor fan motor

• Fan motor is defective.

• Indoor controller board is defec­tive.

5 Defective outdoor fan control
6 Overcharge of refrigerant
7 Defective refrigerant circuit

(clogs)

8 Bypass circuit of outdoor unit

is defective.

1 Slight 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

2 Converse connection of
extension pipe (on plural units

connection)

3 Converse wiring of indoor/
outdoor unit connecting wire

(on plural units connection)

4 Defective detection of indoor

room temperature and pipe
<condenser / evaporator>

temperature thermistor
5 Stop valve is not opened
completely.

5 Check outdoor fan motor.
67 Check operating condition of refrigerant

circuit.

(Heating mode)

1 Check clogs of the filter.
2 Remove shields.

4 Refer to 10-7-1.

5 Check outdoor fan motor.
6~8Check operating condition of refrigerant

circuit.

1~4 Check pipe <liquid or condenser / evapo-

rator> temperature with room tempera­ture display on remote controller and
outdoor controller circuit board.

Pipe <liquid or condenser / evaporator>

temperature display is indicated by set­ting SW2 of outdoor controller circuit
board as follows.

Conduct temperature check with outdoor
controller circuit board after connecting

(

‘A-Control Service Tool(PAC-SK52ST)’.

23Check converse connection of extension

pipe or converse wiring of indoor/outdoor
unit connecting wire.

)

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)

20

Error Code

P9

Abnormal point and detection method

Pipe temperature thermistor /
Condenser-Evaporator (TH5)

1 The unit is in 3-minute resume protec-

tion mode if short/open of thermistor is
detected. Abnormal if the unit does not
get back to normal within 3 minutes. (The
unit returns to normal operation, if it has
been reset normally.)

2 Constantly detected during cooling,

drying, and heating operation (except
defrosting)

Short: 90: or more
Open: -40: or less

Cause

1 Defective thermistor
characteristics
2 Contact failure of connector

(CN29) on the indoor controller
board (Insert failure)

3 Breaking of wire or contact
failure of thermistor wiring
4 Temperature of thermistor is

90: or more or -40: or less
caused by defective refrigerant
circuit.

5 Defective indoor controller

board

Countermeasure

1–3 Check resistance value of thermistor.
For characteristics, refer to (P1) above.
2 Check contact failure of connector (CN29)

on the indoor controller board.
Refer to 10-7-1.
Turn the power on and check restart after

inserting connector again.
4 Operate in test run mode and check pipe

<condenser / evaporator> temperature with

outdoor controller circuit board. If pipe
<condenser / evaporator> temperature is

extremely low (in cooling mode) or high (in

heating mode), refrigerant circuit may have

defect.
5 Operate in test run mode and check pipe

<condenser / evaporator> temperature with

outdoor control circuit board. If there is
extreme difference with actual pipe
<condenser / evaporator> temperature,

replace indoor controller board.
There is no abnormality if none of above

comes within the unit.
Turn the power off and on again to operate.

In case of checking pipe temperature
with outdoor controller circuit board,
be sure to connect A-control service

(

tool (PAC-SK52ST).

)

E0

or

E4

E3

or

E5

Remote controller transmission
error(E0)/signal receiving error(E4)

1 Abnormal if main or sub remote con-

troller cannot receive any transmission
normally from indoor unit of refrigerant
address “0” for 3 minutes.

(Error code : E0)
2 Abnormal if sub remote controller could

not receive any signal for 2 minutes.
(Error code: E0)

1 Abnormal if indoor controller board can

not receive any data normally from
remote controller board or from other
indoor controller board for 3 minutes.
(Error code: E4)

2 Indoor controller board cannot receive

any signal from remote controller for 2
minutes. (Error code: E4)

Remote controller transmission
error(E3)/signal receiving error(E5)

1 Abnormal if remote controller could not

find blank of transmission path for 6 sec­onds and could not transmit.

(Error code: E3)
2 Remote controller receives transmitted

data at the same time and compares the
received and transmitted data. Abnormal
if these data are judged to be different
30 continuous times. (Error code: E3)

1 Abnormal if indoor controller board could

not find blank of transmission path.

(Error code: E5)
2 Indoor controller board receives trans-

mitted data at the same time and com­pares the received and transmitted data.
Abnormal if these data are judged to
be different 30 continuous times. (Error
code: E5)

1 Contact failure at transmission

wire of remote controller

2 All remote controllers are set

as “sub” remote controller.
In this case, E0 is displayed
on remote controller, and E4
is displayed at LED (LED1,
LED2) on the outdoor controller
circuit board.

3 Miswiring of remote controller
4 Defective transmitting receiving

circuit of remote controller

5 Defective transmitting receiving

circuit of indoor controller board
of refrigerant addresses “0”.

6 Noise has entered into the

transmission wire of remote
controller.

1 2 remote controllers are set as

“main.”
(In case of 2 remote con­ trollers)
2 Remote controller is connected

with 2 indoor units or more.
3 Repetition of refrigerant

address
4 Defective transmitting receiving

circuit of remote controller
5 Defective transmitting receiving

circuit of indoor controller board
6 Noise has entered into trans-

mission wire of remote control-

ler.

1 Check disconnection or looseness of indoor

unit or transmission wire of remote controller.

2 Set one of the remote controllers “main”
if there is no problem with the action above.
3 Check wiring of remote controller.

• Total wiring length: max. 500m
(Do not use cable x 3 or more.)

• The number of connecting indoor units:
max. 16 units

• The number of connecting remote control­ler: max. 2 units

When it is not the above-mentioned problem of

1~3
4 Diagnose remote controllers.

a) When “RC OK” is displayed,

Remote controllers have no problem.
Turn the power off, and on again to check.
If abnormality generates again, replace
indoor controller board.

b) When “RC NG” is displayed,

Replace remote controller.

c)When “RC E3” or “ERC 00-66” is dis-

played, noise may be causing abnormality.

* If the unit is not normal after replacing

indoor controller board in group control,
indoor controller board of address “0” may
be abnormal.

1 Set a remote controller to main, and the

other to sub.

2 Remote controller is connected with only one

indoor unit.

3 The address changes to a separate setting.

4~6 Diagnose remote controller.

a) When “RC OK” is displayed, remote con-

trollers have no problem.
Turn the power off,and on again to check.
When becoming abnormal again, replace

indoor controller board.
b)When “RC NG” is displayed, replace

remote controller.
c)When “RC E3” or “ERC 00-66” is dis-

played, noise may be causing abnormal-

ity.

21

Error Code

E6

Abnornal point and detection method

Indoor/outdoor unit communication
error (Signal receiving error)

1 Abnormal if indoor controller board
cannot receive any signal normally for 6

minutes after turning the power on.

2 Abnormal if indoor controller board
cannot receive any signal normally for 3

minutes.

3 Consider the unit abnormal under the fol-

lowing condition: When 2 or more indoor

units are connected to an
outdoor unit, indoor controller board
cannot receive a signal for 3 minutes

from outdoor controller circuit board, a

signal which allows outdoor controller

circuit board to transmit signals.

Cause

1 Contact failure, short circuit or,

miswiring (converse wiring) of
indoor/outdoor unit connecting
wire

2 Defective transmitting receiving

circuit of indoor controller board

3 Defective transmitting receiving

circuit of indoor controller board

4 Noise has entered into indoor/

outdoor unit connecting wire.

Countermeasure

* Check LED display on the outdoor control

circuit board. (Connect A-control service
tool, PAC-SK52ST.)

Refer to outdoor unit service manual.
1 Check disconnection or looseness of indoor/

outdoor unit connecting wire of indoor unit or

outdoor unit.
Check all the units in case of twin triple
indoor unit system.
2-4 Turn the power off, and on again to check.

If abnormality generates again, replace

indoor controller board or outdoor
controller circuit board.
* Other indoor controller board may have
defect in case of twin triple indoor unit
system.

E7

Fb

E1

E2

PA

Indoor/outdoor unit communication
error (Transmitting error)

Abnormal if “1” receiving is detected 30
times continuously though indoor controller
board has transmitted “0”.

Indoor controller board

Abnormal if data cannot be read normally
from the nonvolatile memory of the indoor
controller board.

Remote controller control board

1 Abnormal if data cannot be read nor-

mally from the nonvolatile memory of the
remote controller control board.

(Error code: E1)

or

2 Abnormal if the clock function of remote

controller cannot be operated normally.

(Error code: E2)

Forced compressor stop
(due to water leakage abnormality)

1 When the intake temperature subtracted
with liquid pipe temperature is less than

-10:, drain sensor is detected whether

it is soaked in the water or not at the interval
of 90 seconds. (Drain pump will start operating

when the drain sensor is detected to be

soaked in the water.)
2 The unit has a water leakage abnormality

when the following conditions, a and b, are

satisfied while the above-mentioned detection
is performed.
a) The drain sensor is detected to be
soaked in the water 10 times in a row.
b) The intake temperature subtracted with

liquid pipe temperature is detected to be
less than -10: for a total of 30 minutes.
(When the drain sensor is detected to

be NOT soaked in the water, the detection

record of a and b will be cleared.)
3 The drain sensor detection is performed
in operations other than cooling. (When
the unit stops operating, during heating
or fan operation, when the unit stops
because of some abnormality)
*Once the water leakage abnormality is
detected, abnormality state will not be
released until the main power is reset.

1 Defective transmitting receiving

circuit of indoor controller board

2 Noise has entered into power

supply.

3 Noise has entered into outdoor

control wire.

1 Defective indoor controller

board

1 Defective remote controller 1 Replace remote controller.

1 Drain pump trouble

2 Drain defective

· Drain pump clogging

· Drain pipe clogging

3 Open circuit of drain sensor
side heater

4 Contact failure of drain sensor
connector

5 Dew condensation on drain
sensor

· Drain water descends along
lead wire.

· Drain water waving due to filter
clogging.

6 Extension piping connection
difference at twin, triple,
quadruple system.

7 Mis-wiring of indoor/ outdoor
connecting at twin, triple,
quadruple system.

8 Room temperature thermistor /
liquid pipe temperature thermis­ tor detection is defective.

1-3 Turn the power off, and on again to check.

If abnormality generates again, replace
indoor controller board.

1 Replace indoor controller board.

1 Check the drain pump.

2 Please confirm whether water can be

drained.

3 Confirm the resistance of the drain sensor.

4 Check the connector contact failure.

5 Check the drain sensor leadwire mounted.

Check the filter clogging

6 Check the piping connection.

7 Check the indoor/ outdoor connecting wires.

8 Check the room temperature display of

remote controller.
Check the indoor liquid pipe temperature
display of outdoor controller board.

22

10-4. TROUBLESHOOTING BY INFERIOR PHENOMENA

Note: Refer to the manual of outdoor unit for the detail of remote
controller.

Phenomena

(1)LED2 on indoor controller board
is off.

• When LED1 on indoor controller board is also off.
1 Power supply of rated voltage is not supplied to out-

door unit.

2 Defective outdoor controller circuit board.

3 Power supply of 220~240V is not supplied to indoor

unit.

4 Defective indoor power board.

5 Defective indoor controller board.

(For the separate indoor/outdoor unit power sup-

ply system)

1 Power supply of 220~240V AC is not supplied to

indoor unit.

2 The connectors of the optional replacement kit are

not used.

3 Defective indoor controller board.

4 Defective indoor power board.

• When LED1 on indoor controller board is lit.
1 Mis-setting of refrigerant address for outdoor unit
(There is no unit corresponding to refrigerant
address “0”.)

Cause

Countermeasure

1 Check the voltage of outdoor power
supply terminal block (L, N) or (L

• When AC 220~240V is not detected.
Check the power wiring to outdoor unit
and the breaker.

• When AC 220~240V is detected.

—Check 2 (below).

2 Check the voltage between outdoor
terminal block S1 and S2.

• When AC 220~240V is not detected.

Check the fuse on outdoor controller

circuit board.

Check the wiring connection.

• When AC 220~240V is detected.

—Check 3 (below).

3 Check the voltage between indoor terminal

block S1 and S2.

• When AC 220~240V is not detected.
Check indoor/outdoor unit connecting
wire for mis-wiring.

• When AC 220~240V is detected.

—Check 4 (below).

4 Check voltage output from CN2S on indoor

power board (DC13.1V). Refer to 10-7-2.

• When no voltage is output.
Check the wiring connection.

• When output voltage is between

DC12.5V and DC13.7V.

—Check 5 (below).

5 Check the wiring connection between

indoor controller board and indoor power
board. Check the fuse on indoor controller
board. If no problems are found, indoor
controller board is defective.

1 Check the voltage of indoor power supply

terminal block (L,N).

• When AC220~240V is not detected.

Check the power supply wiring.

• When AC220~240V is detected.

-Check 2 (below).
2 Check that there is no problem in the

method of connecting the connectors.

• When there are problems in the method

of connecting the connectors.

Connect the connector correctly refer-

ring to installation manual of an optional
kit.

• When there is no problem in the meth-

od of connecting the connectors.

-Check 3 (below).
3 Check voltage output from CNDK on

indoor controller board.

• When AC220~240V is not detected.

Check the fuse on indoor controller

board.

Check the wiring connection between

indoor power supply terminal block and
CND on indoor controller board.

• When AC220~240V is detected.

-Check 4 (below).
4 Check voltage output from CN2S on

indoor power board.

• When no voltage output.

Check the wiring connection between
CNDK on indoor controller board and
CNSK on indoor power board.
If no problem are found,indoor power

board is defective.

• When DC12.5~13.7V is detected.

Check the wiring connection between

CN2S on indoor power board and
CN2D on indoor power board.
If no problem are found,indoor controller

board is defective.

1 Reconfirm the setting of refrigerant

address for outdoor unit

Set the refrigerant address to “0”.
(For grouping control system under

which 2 or more outdoor units are
connected, set one of the units to “0”.)
Set refrigerant address using SW1 (3-6)
on outdoor controller circuit board.

3, N).

23

Phenomena

(2)LED2 on indoor controller board
is blinking.

Note: Refer to the manual of outdoor unit for the detail of remote
controller.

Cause

• When LED1 on indoor controller board is also blinking.
Connection failure of indoor/outdoor unit connecting
wire

• When LED1 is lit.
1 Mis-wiring of remote controller wires

Under twin triple indoor unit system, 2 or more indoor

units are wired together.

2 Refrigerant address for outdoor unit is wrong or not

set.
Under grouping control system, there are some units
whose refrigerant address is 0.

3 Short-cut of remote controller wires
4 Defective remote controller

Countermeasure

Check indoor/outdoor unit connecting wire
for connection failure.

1 Check the connection of remote con­ troller wires in case of twin triple indoor

unit system. When 2 or more indoor units
are wired in one refrigerant system,
connect remote controller wires to one of

those units.

2 Check the setting of refrigerant address

in case of grouping control system.
If there are some units whose refrigerant
addresses are 0 in one group, set one of
the units to 0 using SW1 (3-6) on outdoor
controller circuit board.
34 Remove remote controller wires and
check LED2 on indoor controller board.

• When LED2 is blinking, check the short­cut of remote controller wires.

• When LED2 is lit, connect remote

controller wires again and:
if LED2 is blinking, remote controller
is defective; if LED2 is lit, connection
failure of remote controller terminal
block etc. has returned to normal.

(3)Upward/downward vane
performance failure

(4)Receiver for wireless remote
controller

1 The vane is not downward during defrosting and heat

preparation and when the thermostat is OFF in HEAT
mode. (Working of COOL protection function)

2 Vane motor does not rotate.

• Defective vane motor

• Breaking of wire or connection failure of connector

• Up/down vane setting is “No vanes”.

3 Upward/downward vane does not work.

• The vane is set to fixed position.

1 Weak batteries of wireless remote controller.

2 Contact failure of connector (CNB) on wireless

remote controller board.

(Insert failure)
3 Contact failure of connector (CN90) on indoor con-

troller board.(Insert failure)

4 Contact failure of connector between wireless remote

controller board and indoor controller board.

1 Normal operation (The vane is set to

horizontal regardless of remote control.)

2 Check 2 (left).

• Check the vane motor. (Refer to “How
to check the parts”.)

• Check for breaking of wire or connec­tion failure of connector.

• Check “Up/down vane setting”. (Unit
function selection by remote controller).

3 Normal operation (Each connector on

vane motor side is disconnected.)

1 Replace batteries of wireless remote con-

troller.

2~4
Check contact failure of each connector.
If no problems are found of connector,

replace indoor controller board.

When the same trouble occurs even if

indoor controller board is replaced,

replace wireless remote controller

board.

24

10-5. EMERGENCY OPERATION

10-5-1. When wireless remote controller troubles or its battery is exhausted

1. Emergency operation is available in such a case using emergency operation switch equipped next to the receiver of indoor
unit.

2. To start operation

• Cooling Operation·······Press (Cooling) switch.

• Heating Operation·······Press (Heating) switch.

wWhen the unit starts operating, the power lamp is lit.

Emergency switch(Cool)

Emergency switch(Heat)

COOL

STAND

HEAT

BY

ON

O F F

Receiving
section

Defrosting • Initial heating lamp

Power lamp

+Emergency operation will be performed as follows.

Mode

Set temperature

Fan speed

Airflow direction

Cooling

24

High

Horizontal (30deg)

Heating

24
High

Downward (70deg)

3. To stop operation

• Press either emergency operation switch (cooling/heating).

10-5-2. When wired remote controller or indoor unit micro computer troubles

1. If there is not any other wrong when trouble occures, emergency operation starts as the indoor controller board switch (SWE)
is set to ON.

During the emergency operation the indoor unit is as follows;

(1) Indoor fan high speed operation

2. When emergency operating for COOL or HEAT, setting of the switch (SWE) in the indoor controller board and outdoor unit
emergency operation are necessary.

3. Check items and notices as the emergency operation

(1) Emergency operation cannot be used as follows;

• When the outdoor unit is something wrong.

• When the indoor fan is something wrong.

• When drain over flow protected operation is detected during self-diagnosis. (Error code : P5)

(2) Emergency operation will be serial operation by the power supply ON/OFF.

ON/OFF or temperature, etc. adjustment is not operated by the remote controller.

(3) Do not operate for a long time as cold air is blown when the outdoor unit starts defrosting operation during heat emer-

gency operation.
(4) Cool emergency operation must be within 10 hours at most. It may cause heat exchanger frosting in the indoor unit.
(5) After completing the emergency operation, return the switch setting, etc. in former state.
(6) Since vane does not work at emergency operation, position the vane manually and slowly.

25

10-6. HOW TO CHECK THE PARTS

PKH-P35GALH PKA-RP35GAL PKA-RP35GAL#1
PKH-P50GALH PKA-RP50GAL PKA-RP50GAL#1

Parts name Check points

Room temperature
thermistor (TH1)

Pipe temperature
thermistor (TH2)

Condenser/evaporator
temperature thermistor
(TH5)

Fan motor

Relay connector

3

Red

White

2

1

Black

Protector
OFF:125±5°C
ON :79±15°C

Vane motor

Orange



Red



Pink



M

Yellow Brown Blue



Disconnect the connector then measure the resistance with a tester.
(Surrounding temperature 10~30)

Normal

4.3k~9.6k

Abnormal

Open or short

Measure the resistance between the terminals with a tester.
(Winding temperature 20)

1

2

3

Motor terminal

or

Relay connector

Red–Black

White–Black

Normal

120.5

111. 3

Measure the resistance between the terminals with a tester.
(Surrounding temperature 20~30)

Connector

Normal

Brown–Yellow

Brown–Blue

Red–Orange

186~214

Red–Pink

(Refer to <Thermistor Characteristic graph>
for a detail.)

Abnormal

Open or short

Abnormal

Open or short

Heater

Measure the resistance of each heater element by with a tester.

(Only PKH)

Contactor
(for heater)

(Only PKH)

Measure the resistance between the terminals with a tester.

Normal

61

88H

160

<Thermistor Characteristic graph>

Thermistor for
lower temperature

Room temperature thermistor(TH1)
Pipe temperature thermistor(TH2)
Condenser/evaporator temperature
thermistor(TH5)

Thermistor R0=15k" ± 3%
Fixed number of B=3480 ± 2%

Rt=15exp { 3480( ) }

1

273+t

273

0: 15k"
10: 9.6k"
20: 6.3k"
25: 5.4k"
30: 4.3k"
40: 3.0k"

Normal

72

800W 240V

1

Abnormal

Open or short

Abnormal

Open or short

26

< Thermistor for lower temperature >

50

40

30

20

Resistance (k)

10

0

-20-100 1020304050

Temperature ()

10-7. TEST POINT DIAGRAM

10-7-1. Indoor controller board
PKA-RP35GAL PKA-RP35GAL#1 PKH-P35GALH
PKA-RP50GAL PKA-RP50GAL#1 PKH-P50GALH

CN3C
Transmission (Indoor/

outdoor)

(0~24V DC)

CNDK
Connect to the indoor

power board (CNSK)

(220~240V AC)

FUSE
(6.3 A 250 V)

CND
Power supply input
(220~240V AC)

CNP
Drain-pump output

(DP)

(220~240V AC)

CN2D
Connect to the indoor

power board (CN2S)

(12.5~13.7V DC)

LED1
Power supply (I.B)

LED2
Power supply (R.B)

LED3
Transmission (Indoor/
outdoor)

CN22
Connect to the terminal
block(TB5)
(Remote controller connecting
wire)
(10.4~14.6V DC)

CN20
Room temperature
thermistor (TH1)

CN21
Pipe temperature
thermistor/Liquid (TH2)

CN29
Condenser/evaporator
temperature thermistor (TH5)

CN31
Drain sensor (DS)

CN90
Connect to the wireless
remote controller board
(CNB)

CN6V
Vane motor output
(MV)

CN41
Connector (HA terminal-A)

SWE
Emergency operation

FAN
Fan motor output

Jumper wire J41, J42
Pair number setting with
wireless remote controller

27

SW2
Capacity setting

CN51
Centrally control

CN24
Heater output
(12V DC)

CN2L
Connector
(LOSSNAY)

SW1
Model setting

10-7-2. Indoor power board
PKA-RP35GAL PKA-RP35GAL#1 PKH-P35GALH
PKA-RP50GAL PKA-RP50GAL#1 PKH-P50GALH

CN2S
Connect to the indoor controller board (CN2D)
Between 1 to 3 12.6-13.7V DC (Pin1 (+))

CNSK
Connect to the indoor controller board
(CNDK)
Between 1 to 3 220-240V AC

28

10-8. FUNCTIONS OF DIP SWITCH AND JUMPER WIRE

Each function is controlled by the dip switch and the jumper wire on control P.C. board.
SW1 and SW2 are equipped only for service parts.
Model setting and capacity setting are memorized in the nonvolatile memory of the control P.C. board of
the unit.

(Marks in the table below) Jumper wire ( : Short : Open)

Jumper wire

SW1

SW2

J41
J42

JP1

Functions

Model
settings

Capacity
settings

Pair number
setting with
wireless
remote
controller

Unit type
setting

Setting by the dip switch and jumper wire

For service board

12345

Models

PKA-RP35GAL
PKH-P35GALH

PKA-RP50GAL
PKH-P50GALH

Wireless remote
controller setting

0
1
2

3 ~ 9

Model

Without TH5

With TH5

ON

OFF

Service board

12345

12345

Control PCB setting

J41 J42

JP1

OFF

OFF

ON

ON

Remarks

<Initial setting>
Wireless remote controller: 0
Control PCB: (for both J41 and J42)
Four pair number settings are supported.
The pair number settings of the wireless remote
controller and indoor control PCB (J41/J42) are
given in the table on the left.
(' ' in the table indicates the jumper line is disco­nnected.)

There is no jumper (JP1) because these models
have the cond./eva. temperature thermistor (TH5).

JP3

Indoor
controller
board type
setting

Indoor controller board type

For product

Service parts

JP3

29

11

SPECIAL FUNCTION

11-1. ROTATION FUNCTION(AND BACK-UP FUNCTION, 2ND STAGE CUT-IN FUNCTION)

For PKA-RP35GAL#1, PKA-RP50GAL#1
11-1-1. Operation
(1) Rotation function (and Back-up function)

• Outline of functions

· Main and sub unit operate alternately according to the interval of rotation setting.
w Main and sub unit should be set by refrigerant address.(Outdoor Dip switch setting)
Refrigerant address"00" Main unit
Refrigerant address"01" Sub unit

· When error occurrs to one unit, another unit will start operation.(Back-up function)

• System constraint

· This function is available only by the grouping control system(INDOOR UNIT : OUTDOOR UNIT=1:1) of 2 refrigerant
groups.(Refer to Fig. 1)

· Main indoor unit should be connected for wired remote controller and the transmission line(TB5) for main and sub unit
should also be connected. (Refer to Fig. 1)

(This function cannot be set by wireless remote controller.)

· Set refrigerant address of each unit.(Dip switch on the outdoor unit···Refrigerant address 00/01)

Operation pattern

[Back-up function only]··· Request code number "312"

Start operation

Main

unit

IC-1

Sub

unit

IC-2

[Rotation function] & [Back-up function]··· Request code number "313~318"



Start operation

Main

unit

IC-1

Sub

unit

IC-2

(Ex:When the request code number is "313", each unit operates alternately in daily cycle.)

Run

Stop

Main Sub Sub Main Main Sub

Run

Stop

1~28 days 1~28 days

Error occurs on main unit.
Main Sub

Abnormal condition

Run

Stop

Run

Run

Stop Run

Error occurs on main unit.

Abnormal condition

Main
unit

2

Refrigerant address
"00"

OC-1

3(2)

IC-1

2

RC

Fig. 1

OC : Outdoor unit
IC : Indoor unit
RC : Wired remote controller

Refrigerant address
"01"

OC-2

Sub

3(2)

unit

IC-2

Note:

· When the uint is restarted to operate after turning off the power or OFF operation, the unit which was operating will start
operation.

· To operate the main unit, refer to the 11-1-2. and set the requet code No. which is not the same as the current one, and set
again the former request code No.

(2) 2nd stage cut-in function
Outline of functions

· Number of operating units is determined according to the room temperature and set point.

· When room temperature becomes higher than set point, standby unit starts.(2 units operation)

· When room temperature falls below set point -4:, standby unit stops.(1 unit operation)

System constraint

· This function is available only in rota­tion operation and back-up function in
cooling mode.

[2nd stage cut-in function]··· Request code number "322~324"

Start operation Sub unit start operation

Main

unit

IC-1

Room temp. Set point

Run

Room temp. < Set point -4

Sub unit stop

Sub

unit

IC-2

Stop StopRun

30

11-1-2. How to set rotation function(Back-up function, 2nd stage cut-in function)

You can set these functions by wired remote controller.(Maintenance monitor)

NOTICE

Both main and sub unit should be set in same setting.
Every time replacing indoor controller board for servicing, the function should be set again.

(1) Request Code List

Rotation setting

Setting No.

(Request code)

No.1
(310)

No.2
(311)

No.3
(312)

No.4
(313)

No.5
(314)

No.6
(315)

No.7
(316)

No.8
(317)

No.9
(318)

Setting contents

Monitoring the request code of current setting.

Rotation and Back-up OFF (Normal group control operation)

Back-up function only

Rotation ON (Alternating interval = 1day) and back up function

Rotation ON (Alternating interval = 3day) and back up function

Rotation ON (Alternating interval = 5day) and back up function

Rotation ON (Alternating interval = 7day) and back up function

Rotation ON (Alternating interval = 14day) and back up function

Rotation ON (Alternating interval = 28day) and back up function

Initial

setting

nd stage cut-in setting

2

Setting No.

(Request code)

No.1
(320)

No.2
(321)

No.3
(322)

No.4
(323)

No.5
(324)

Setting contents

Monitoring the request code of current setting.

Cut-in function OFF

Cut-in Function ON(Set point = Set temp.+ 4°C(7.2°F))

Cut-in Function ON(Set point = Set temp.+ 6°C(10.8°F))

Cut-in Function ON(Set point = Set temp.+ 8°C(14.4°F))

Initial

setting

3131

(2) Setting method of each function by wired remote controller













1. Stop operation().

2. Press the button () for 3 seconds so that [Maintenance mode] appears on the screen ().
After a while, [00] appears in the refrigerant address number display area.(at  )

3. Press the button () for 3 seconds to switch to [Maintenance monitor].

Note) It is not possible to switch to [Maintenance monitor] during data request in maintenance mode

[----] appears on the screen () when [Maintenance monitor] is activated.
(The display () now allows you to set a request code No.)

TEST

CHECK

(i.e., while “----” is blinking) since no buttons are operative.









B: Refrigerant address
C: Data display area
D: Request code display area

4. Press the [TEMP ( and )] buttons () to select the desired refrigerant address.

[ScreenB]

5. Press the [CLOCK ( and )] buttons () to set the desired request code No.(“311~318”, “321~324”)

6. Press the button () to perform function setting.
If above setting operations are done correctly, "Request code number" will appear in data display area.()
[Example: When the "311" of "Request code number" is set, [311] appears on the screen.()]

[Refererence]
You can check current "request code number" setting by setting the "request code number"(“310” or “320”) and
pressing the button.()
[Example: When the current setting is "Setting No.2(Request code 311)", [311] appears on the screen.()]

7. To return to normal mode, press the button ().

FILTER

FILTER

  

ON/OFF

32

12

DISASSEMBLY PROCEDURE

PKA-RP35GAL PKA-RP35GAL#1 PKH-P35GALH
PKA-RP50GAL PKA-RP50GAL#1 PKH-P50GALH

OPERATION PROCEDURE

1. REMOVE THE LOWER SIDE OF THE INDOOR UNIT FROM
THE INSTALLATION PLATE.

(1) Remove the left / right corner box of the indoor unit.
(2) Hold and pull down the lower and both ends of the indoor

unit, and remove the ▼ section from the square hole.
(Refer to the figure 2.1)
Or remove the front panel and push the ▼ section down
by using hexagonal wrench ,etc. from the front side.
(Refer to the figure 2.2).
(3) Unhook the top of the indoor unit from the back plate catch.

(Figure 2.2)

Square hole

2. REMOVING THE FRONT PANEL.

(1) Open the front grille.
(2) Remove the terminal block cover with a screw.
(3) Remove the screw 3caps then remove the set 3screws.
(4) After removing the lower side of the front panel a little,

remove it as pulling toward upper.

Up

Down

PHOTOS & ILLUSTRATION

(Figure 1)

(Figure2.1)

(Figure 3)

Hook

Hook

Square hole

Terminal block cover

3. REMOVING THE INDOOR CONTROLLER BOARD.

(1) Remove the terminal block cover.
(2) Remove the front panel. (see the photo 1)
(3) Remove the electrical parts box(2screws).
(4) Remove the electrical parts box cover(1screw).
(5) Disconnect the connector on the controller board and
remove the controller board by Pulling up the hook of the
controller case.
w To smooth works, hang the side hooks of the electrical
parts box on the hook of the motor cover.
(see the photo 3)

(Photo 1)

Front
panel

(Photo 2)

Motor cover

Electrical parts
box hook w

(Photo 3)

Front grille

Set screw

Set screw

Electrical parts
box

Set screw

Control board

3333

Hook

Controller case

Electrical parts box

OPERATION PROCEDURE

PHOTOS & ILLUSTRATION

4. REMOVING THE POWER BOARD

(1) Remove the front panel.(see the photo 1)
(2) Remove the electrical parts box(2screws).(see the photo 2)
(3) Disconnect the whole connector in the control board.
(4) After lifting the controller case with pressing it’s convex
section, remove the controller case and the control board
simultaneously.(see the photo 3)
(5) Disconnect the connector in the power board.
(6) Remove the power board.

5. REMOVING THE VANE MOTOR

(1) Disconnect the connector CN6V on the indoor controller
board.
(2) Remove the 2screws of the vane motor, disconnect the
lead wire and remove the vane motor from the shaft.

6. REMOVING THE THERMISTOR
(1) Removing the room temperature thermistor TH1.

1Disconnect the connector CN20<red> on the indoor
controller board.
2Remove the room temperature thermistor from the holder.
(2) Removing the pipe temperature thermistor TH2.
1Disconnect the connector CN21<white> on the controller
board.
2Remove the pipe temperature thermistor with set to the pipe.
(3) Removing the indoor coil temperature thermistor TH5.
1Disconnect the connector CN29<black> on the indoor con-
troller board.
2Remove the gas pipe thermistor with set to the pipe.

(Photo 4)

(Photo 5)

Nozzle
assemble

Van motor

(Photo 6)

Pipe
temperature
thermistor
(TH2)

Room
temperature
thermistor
(TH1)

Power board

Electrical parts
box

Set screws

Lead wire

Condenser
/evaporator
temperature
thermistor
(TH5)

Electrical
parts box

7. REMOVING THE NOZZLE ASSEMBLE

(1) Disconnect the connector CN6V on the controller board.
(2) Disconnect the lead wire of the vane motor.
(3) Remove the corner cover.
(4) Pull the drain hose out from the nozzle assemble.
(5) Unhook the hook of the lower nozzle assemble and
pull the nozzle assemble toward you,then remove the
nozzle assemble by sliding it down.

8. REMOVING THE ELECTRICAL PARTS BOX

(1) Remove the terminal block cover.
(2) Disconnect the connector <yellow> of the wireless remote
controller board.
(3) Remove the front panel.(see the photo 1)
(4) Disconnect the vane motor connector.
(5) Disconnect the fan motor connector from the fan motor.
(6) Disconnect the connector <yellow> of the heater. (only PKH).
(7) Remove the liquid(TH2) / gas(TH5) pipe thermistors.(see the
photo 6)
(8) Remove the electrical parts box (2screws).

(Photo 7)

Nozzle assemble

(Photo 8)

Pipe
temperature
thermistor

Hook

Fan motor connector

Drain hose

Corner cover

Vane motor
connector

Electrical
parts box

34

OPERATION PROCEDURE PHOTOS & ILLUSTRATION

9. REMOVING THE FAN MOTOR.
(1) Remove the terminal block cover.

(2) Disconnect the connector <yellow> of the wireless remote
controller board.
(3) Remove the front panel.(see the photo 1)
(4) Remove the electrical parts box.(see the photo 8)
(5) Remove the nozzle assemble.(see the photo 7)
(6) Remove the fan motor leg fixing 3screws.
(7) Unscrew the set screws using by alankey and remove it by
sliding the fan motor to right.
(8) Remove the 4screws and remove the motor cover from the
fan motor leg.

10. REMOVING THE LINE FLOW FAN

(1) Remove the terminal block cover.
(2) Remove the front panel.(see the photo 1)
(3) Remove the electrical parts box.(see the photo 8)
(4) Remove the nozzle assembly.(see the photo 7)
(5) Remove the fan motor.(see the photo 9)
(6) Remove the pipe fixture with 2screws.(see the photo12)
(7) Remove the left / right screws of the heat exchanger and
pull the left-hand side up.
(8) Remove the 2screws by sliding it toward you remove the
fixture(fixing bearing).
w The fan motor is removable first , when the fan
removing is hard.
w When resetting the fan to the fan motor.
Locate and fix the shaft after installing the fan.

(Photo 9)

Set

screw

(Photo 10)

Motor cover

Fan motor

(Photo11)

Heat exchanger

Set screws

Fixture(fixing bearing)

Motor cover

Fan motor

screws

motor leg

11. REMOVING THE HEAT EXCHANGER

(1) Remove the terminal block cover.
(2) Disconnect the connector <yellow> of the wireless remote

controller board.

(3) Remove the front panel.(see the photo 1)
(4) Remove the electrical parts box.(see the photo 8)
(5) Remove the corner box.
(6) Remove the nozzle assemble.(see the photo 7)
(7) Remove the 2screws and the pipe fixture.
(8) Remove the 2screws and heat exchanger.

12. REMOVING ELECTRICAL HEATER (PKH-P35/50GALH only)

(1) Remove the terminal block cover.
(2) Disconnect the connector <yellow> for the wireless remote
controller.
(3) Remove the front panel.(see the photo 1)
(4) Remove the electrical parts box.(see the photo 8)
(5) Remove the nozzle assembly.(see the photo 7)
(6) Remove the heat exchanger.(see the photo 12)
(7) Remove the 2screws and electrical heater.

(Photo 12)

Set screw

(Photo 13)

Pipe fixture

Set screws

Electrical heater

Heat exchanger

Set screws

35

OPERATION PROCEDURE

PHOTOS & ILLUSTRATION

13. REMOVING the SIGNAL RECEIVING P.C. BOARD

(1) Remove the terminal block cover.
(2) Disconnect the connector <yellow> for the wireless remote
controller.
(3) Remove the front panel.(see the photo 1)
(4) Remove the 2screws and signal receiving p.c. board cover.
(5) Remove the signal receiving p.c. board.

(Photo 14)

Set screws

(Photo 15)

Front
panel

Signal receiving p.c. board cover

Front
panel

Signal receiving p.c. board

36

13 PARTS LIST (non-RoHS compliant)

STRUCTURAL PARTS
PKH-P35GALH, PKA-RP35GAL
PKH-P50GALH, PKA-RP50GAL

2

4

5

6

1

3

12

11

No.

Parts No.

R01 07Y 808

1

R01 09Y 658

2

R01 07Y 623

3

R01 89Y 651

4

R01 07Y 096

5

R01 07Y 092

6

R01 07Y 691

7

R01 A16 500

8

R01 07Y 002

9

R01 24K 658

10

R01 07Y 658

11

R01 09Y 635

12

R01 07Y 635

T7W E06 714

13

R01 E01 049

14

R01 E00 075

15

7

8

Parts Name

BACK PLATE

CORNER COVER

UNDER COVER

FRONT PANEL

SCREW CAP

VANE SLEEVE

FRONT GRILLE

AIR FILTER

AUTO VANE

RECEIVING UNIT

CORNER COVER

BOX ASSEMBLY

BOX ASSEMBLY

WIRELESS REMOTE CONTROLLER

WIRELESS REMOTE CONTROLLER DOOR

WIRELESS REMOTE CONTROLLER HOLDER

Specifications

9

10

PKH-

P35 / P50

GALH

1

1

1

1

3

1

1

2

1

1

1

1

1

1

1

13

PKA-

RP35 / RP50

GAL

1

1

1

1

3

1

1

2

1

1

1

1

1

1

1

14 15

Remarks

(Drawing No.)

Wiring

Diagram

Symbol

RU

Recom­mended

Q'ty

3737

ELECTRICAL PARTS
PKH-P35GALH, PKA-RP35GAL
PKH-P50GALH, PKA-RP50GAL

1

37

36

4

3

2

35

5

34

6

32

27

33

9

7

8

17

1

31

29

30

28

26

25

24

10

11

23

16

12

10

13

14

15

18

19

20

21

22

No.

Parts No. Parts Name

R01 E48 480

1

T7W E56 480

R01 09Y 114

2

R01 07Y 114

3

R01 07Y 102

4

R01 005 103

5

R01 07Y 106

6

T7W A00 675

7

R01 07Y 524

8

R01 07Y 527

9

R01 07Y 530

10

R01 09Y 038

11

R01 07Y 038

R01 07Y 059

12

R01 E04 223

13

R01 E03 317

14

R01 07Y 135

15

R01 07Y 105

16

T7W A01 762

17

HEAT EXCHANGER

HEAT EXCHANGER

LINE FLOW FAN

LINE FLOW FAN

BEARING MOUNT

SLEEVE BEARING

BEARING SUPPORT

FAN GUARD

DRAIN PLUG

DRAIN HOSE

NOZZLE

GUIDE VANE

GUIDE VANE

ARM

VANE MOTOR

WIRELESS ADAPTER CONTROLLER BOARD

MOTOR COVER

RUBBER MOUNT

FAN MOTOR

Specifications

PM4V30-K

PKH- PKA-

P35 / P50

GALH

1

1

1

1

1

1

1

1

1

4

10

2

1

1

1

2

1

RP35 / RP50

GAL

1

1

1

1

1

1

1

1

1

4

10

2

1

1

1

2

1

Remarks

(Drawing No.)

Wiring

Diagram

Symbo

l

MV

W.B

MF

Recom­mended

Q'ty

38

To be continued on the next page.

From the preceding page.

Part numbers that is circled is not shown in the figure.

No.

Parts No. Parts Name

18

T7W A14 716

19

T7W E23 716

20

R01 588 255

21

T7W E40 310

22

23

24

R01 E02 313

25

R01 E02 239

26

27

R01 71G 215

28

29

R01 E58 202

30

T7W E05 202

31

R01 E02 202

32

R01 07Y 130

33

R01 64K 700

34

T7W E13 300

35

R01 986 706

36

R01 208 706

37

R01 20J 303

38

—

—

—

—

—

TERMINAL COVER

TERMINAL BLOCK

TERMINAL BLOCK

CAPACITOR

INDOOR CONTROLLER BOARD

CONTROLLER COVER

CONTROLLER CASE

POWER BOARD

FUSE

ELECTRICAL PARTS COVER

HEATER CONTACTOR

SENSOR HOLDER

CONDENSER / EVAPORATOR TEMPERATURE THERMISTOR

ROOM TEMPERATURE THERMISTOR

PIPE TEMPERATUER THERMISTOR

MOTOR SUPPORT

HEATER THERMAL SWITCH

HEATER ELEMENT

THERMAL FUSE

THERMAL FUSE

INSULATOR

Specifications

3P(L, N, )

3P(S1, S2, S3)

2.0 ×440V

250V 6.3A

60C OFF 40C ON

800W

104C 10A

84C 10A

PKH-

P35 / P50

GALH

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

PKA-

RP35 / RP50

GAL

1

1

1

1

1

1

1

1

1

1

1

1

1

1

Remarks

(Drawing No.)

(BG02V195H10)

(BG02V194G01)

(BG25B573H06)

(BG00V196G41)

(RG25C546H06)

Diagram

Symbo

FUSE

Wiring

TB2

TB4

C

I.B

P. B

88H

TH5

TH1

TH2

26H

H1

FS1

FS2

Recom­mended

Q'ty

l

39

14 RoHS PARTS LIST

ELECTRICAL PARTS
PKH-P35GALH, PKA-RP35GAL, PKA-RP35GAL#1
PKH-P50GALH, PKA-RP50GAL, PKA-RP50GAL#1

1

37

36

4

3

2

35

5

34

6

32

27

33

9

7

8

17

1

31

29

30

28

26

25

24

10

11

23

16

12

10

13

14

15

18

19

20

21

22

No.

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

Parts No. Parts Name

RoHS

R01 E70 480

G

T7W H36 480

G

R01 E21 114

G

R01 E22 114

G

R01 08Y 102

G

R01 E04 103

G

R01 08Y 106

G

T7W A01 675

G

R01 08Y 524

G

R01 08Y 527

G

R01 08Y 530

G

R01 10Y 038

G

R01 08Y 038

G

R01 08Y 059

G

R01 E14 223

G

R01 E06 317

G

R01 08Y 135

G

R01 08Y 105

G

T7W A02 762

G

HEAT EXCHANGER

HEAT EXCHANGER

LINE FLOW FAN

LINE FLOW FAN

BEARING MOUNT

SLEEVE BEARING

BEARING SUPPORT

FAN GUARD

DRAIN PLUG

DRAIN HOSE

NOZZLE

GUIDE VANE

GUIDE VANE

ARM

VANE MOTOR

WIRELESS ADAPTER CONTROLLER BOARD

MOTOR COVER

RUBBER MOUNT

FAN MOTOR

Specifications

PM4V30-K

PKH-

P35 / P50

GALH

1

1

1

1

1

1

1

1

1

4

10

2

1

1

1

2

1

PKA-

RP35 / RP50

GAL(#1)

1

1

1

1

1

1

1

1

1

4

10

2

1

1

1

2

1

To be continued on the next page.

Remarks

(Drawing No.)

Wiring

Diagram

Symbo

l

MV

W.B

MF

Recom-

mended

Q'ty

40

From the preceding page.

Part number that is circled is not shown in the figure.

PKH- PKA-

No.

18 G — TERMINAL COVER 1 1 1
19 G T7W E23 716 TERMINAL BLOCK 3P(L, N,
20 G R01 E20 246 TERMINAL BLOCK
21 G R01 E13 255 CAPACITOR 2.0+×440V 1 1 1 C

22

23 G — CONTROLLER COVER 1 1 1
24 G — CONTROLLER CASE 1 1 1
25 G R01 E38 313 POWER BOARD 1 1 1 P.B
26 G R01 E06 239 FUSE 250V 6.3A 1 1 1 FUSE
27 G —
28 G R01 E03 215 HEATER CONTACTOR 1 88H
29 G — SENSOR HOLDER 1 1 1
30 G R01 H05 202
31 G R01 H08 202
32 G R01 H11 202
33 G R01 08Y 130 MOTOR SUPPORT 1 1 1
34 G R01 E11 700
35 G T7W E18 300 HEATER ELEMENT 800W 1 H1
36 G R01 E00 706 THERMAL FUSE 104°C 10A 1 FS1
37 G R01 E01 706 THERMAL FUSE 84°C 10A 1 FS2
38 G R01 31J 303 INSULATOR 1

Parts No. Parts Name

RoHS

G T7W E50 310
G T7W E73 310

INDOOR CONTROLLER BOARD
INDOOR CONTROLLER BOARD

ELECTRICAL PARTS COVER

CONDENSER/EVAPORATOR TEMPERATURE THERMISTOR
ROOM TEMPERATURE THERMISTOR
PIPE TEMPERATURE THERMISTOR

HEATER THERMAL SWITCH

Specifi cations

3P(S1, S2,S3)

60°C OFF 40°C ON

;

P35/P50

GALH

1 TB2

)

111 TB4

1 1 I.B

111

111 TH5
111 TH1
111 TH2

1 26H

RP35/RP50

GAL

RP35/RP50
GAL#1

Remarks

(Drawing No.)

(BG02V195H10)

1 I.B

(BG02V194G01)
(BG25B573H06)

(BG00V196G53)

(RG25C546G01)

Wiring

Diagram

Symbol

Recom­mended

Q'ty

4141

STRUCTURAL PARTS
PKH-P35GALH, PKA-RP35GAL, PKA-RP35GAL#1
PKH-P50GALH, PKA-RP50GAL, PKA-RP50GAL#1

1

2

4

3

12

5

6

11

13

7

No.

1 G R01 08Y 808 BACK PLATE 1 1 1
2 G R01 10Y 658 CORNER COVER(R) 1 1 1
3 G R01 08Y 623 UNDER COVER 1 1 1
4 G R01 E05 651 FRONT PANEL 1 1 1
5 G R01 08Y 096 SCREW CAP 3 3 3
6 G R01 08Y 092 VANE SLEEVE 1 1 1
7 G R01 08Y 691 FRONT GRILLE 1 1 1

8

9 G R01 08Y 002 AUTO VANE 1 1 1
10 G R01 E18 658 RECEIVING UNIT 1 1 1 RU
11 G R01 08Y 658 CORNER COVER(L) 1 1 1

12

13 G T7W E10 714
14 G R01 E03 049
15 G R01 E00 075

Parts No. Parts Name

RoHS

G R01 A16 500 AIR FILTER 2 2
G R01 A32 500 AIR FILTER 2

G R01 10Y 635 BOX ASSEMBLY 1
G R01 08Y 635 BOX ASSEMBLY 1 1

WIRELESS REMOTE CONTROLLER
WIRELESS REMOTE CONTROLLER DOOR
WIRELESS REMOTE CONTROLLER HOLDER

8

Specifi cations

9

P35/P50

10

PKH- PKA-

RP35/RP50

GALH

111
111
111

GAL

RP35/RP50

GAL#1

Remarks

(Drawing No.)

14 15

Wiring

Diagram

Symbol

Recom­mended

Q'ty

42

43

HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN

CCopyright 2005 MITSUBISHI ELECTRIC ENGINEERING CO., LTD.
Distributed in May 2008 No.OC330 REVISED EDITION-B PDF 7
Distributed in Jun. 2006 No.OC330 REVISED EDITION-A PDF 8
Distributed in Apr. 2005 No.OC330 PDF 9
Made in Japan.

New publication, effective May 2008
Specifications subject to change without notice.