Mitsubishi Electronics Digital Air Conditioner Pca A24Ga Users Manual OC368B 1.qxp

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OC368B--1.qxp

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Page 1

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

June 2007
No. OC368
REVISED EDITION-B

SERVICE MANUAL
Indoor unit
[Model names]

[Service Ref.]

PCA-A24GA
PCA-A24GA1
PCA-A30GA
PCA-A30GA1
PCA-A36GA
PCA-A36GA1
PCA-A42GA
PCA-A42GA1

PCA-A24GA

PCA-A30GA

PCA-A36GA

PCA-A42GA

Revision:
• WIRING DIAGRAM has been
changed in REVISED EDITION-B.
• Some descriptions have been
modified.
• Please void OC368 REVISED
EDITION-A.

NOTE:
• This manual describes only
service data of the indoor
units.
• RoHS compliant products have
 mark on the spec name
plate.
• For servicing RoHS compliant products, refer to the RoHS
PARTS LIST.

CONTENTS

INDOOR UNIT

TEMP.

ON/OFF

Model name
indication

1. TECHNICAL CHANGES ··································2
2. REFERENCE MANUAL ······································2
3. SAFETY PRECAUTION···································3
4. PART NAMES AND FUNCTIONS ···················5
5. SPECIFICATIONS ············································8
6. NOISE CRITERION CURVES ··························9
7. OUTLINES AND DIMENSIONS ·····················10
8. WIRING DIAGRAM············································12
9. REFRIGERANT SYSTEM DIAGRAM ··················13
10. TROUBLESHOOTING ···································14
11. DISASSEMBLY PROCEDURE·······················26
12. PARTS LIST ···················································31
13. RoHS PARTS LIST ········································34

REMOTE CONTROLLER

33223

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Page 2

TECHNICAL CHANGES

PCA-A24GA ➔
PCA-A30GA ➔
PCA-A36GA ➔
PCA-A42GA ➔

PCA-A24GA1
PCA-A30GA1
PCA-A36GA1
PCA-A42GA1

• Indoor controller board has been changed.

2

REFERENCE MANUAL

2-1. OUTDOOR UNIT SERVICE MANUAL
Service Manual No.

Service Ref.
PUZ-A18/24/30/36/42NHA
PUZ-A18/24/30/36/42NHA-BS
PUY-A12/18/24/30/36/42NHA(1)
PUY-A12/18/24/30/36/42NHA(1)-BS

OC367

2-2. TECHNICAL DATA BOOK
Manual No.

Series (Outdoor unit)
PUZ-A·NHA PUZ-A·NHA-BS
PUY-A·NHA PUY-A·NHA-BS

OCS04

2

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Page 3

SAFETY PRECAUTION

3-1. ALWAYS OBSERVE FOR SAFETY
Before obtaining access to terminals, all supply
circuits must be disconnected.

3-2. CAUTIONS RELATED TO NEW REFRIGERANT
Cautions for units utilising refrigerant R410A

Use new refrigerant pipes.

Do not use refrigerant other than R410A.
If other refrigerant (R22 etc.) is used, chlorine in refrigerant can cause deterioration of refrigerant oil etc.

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.

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.

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 enters into refrigerant cycle, that can
cause deterioration of refrigerant oil or malfunction of compressor.

Use the following tools specifically designed for
use with R410A refrigerant.
The following tools are necessary to use R410A refrigerant.
Gauge manifold
Charge hose
Gas leak detector
Torque wrench

Tools for R410A
Flare tool
Size adjustment gauge
Vacuum pump adaptor
Electronic refrigerant
charging scale

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

Keep the tools with care.

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

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

Charge refrigerant from liquid phase of gas
cylinder.

Do not use a charging cylinder.

If the refrigerant is charged from gas phase, composition
change may occur in refrigerant and the efficiency will be
lowered.

If a charging cylinder is used, the composition of refrigerant will change 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 a 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.

3

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[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.)

Unit

Gravimeter

[3] Service tools
Use the below service tools as exclusive tools for R410A refrigerant.
No.
1

Specifications
Gauge manifold

·Only for R410A
·Use the existing fitting specifications. (UNF1/2)
·Use high-tension side pressure of 5.3MPa·G or over.

2

Charge hose

·Only for R410A
·Use pressure performance of 5.09MPa·G or over.

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

·Only for R410A

Top of cylinder (Pink)
Cylinder with syphon

4

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Page 5

PART NAMES AND FUNCTIONS

● Indoor Unit
Left/right guide vanes
Change the direction of airflow
from the horizontal blower.

Air outlet

Long-life filter
Removes dust and foreign matter from air coming in
through the grille (Recommended cleaning interval :
Approx. every 2,500 operating hours)

Up/down guide vanes
Change the direction of airflow from the
vertical blower.

Air intake
Intake grille

● Wired remote controller
Once the controllers are set, the same operation mode can be repeated by simply pressing the ON/OFF button.

ON/OFF button

Temperature setting buttons
Down

Fan Speed button

Up
Timer Menu button
(Monitor/Set button)

Filter
button
( button)

Mode button (Return button)

TEMP.

ON/OFF

Set Time buttons

Check button (Clear button)

Back
Ahead

Test Run button

MENU
BACK

MONITOR/SET

ON/OFF

FILTER

DAY

CHECK TEST

Airflow Up/Down button
Timer On/Off button
(Set Day button)

PAR-21MAA

CLOCK

OPERATION

CLEAR

Louver button
(
Operation button)
To return operation
number

Opening the
lid

Ventilation button
( Operation button)
Built-in temperature sensor

5

To go to next operation
number

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● Wired remote controller
Display Section
For purposes of this explanation,
all parts of the display are shown
as lit. During actual operation, only
the relevant items will be lit.

Day-of-Week

“Sensor” indication

Shows the current day of the week.

Displayed when the remote controller
sensor is used.

Time/Timer Display
Shows the current time, unless the simple or Auto Off
timer is set.
If the simple or Auto Off timer is set, the time to be
switched off is shown.

“Locked” indicator
Indicates that remote controller buttons have been locked.

Identifies the current operation
“Clean The Filter” indicator

Shows the operating mode, etc.
*Multilanguage display is available.

To be displayed on when it is time to
clean the filter.

TIME SUN MON TUE WED THU FRI SAT
TIMER
Hr
ON
AFTER

AFTER OFF

ERROR CODE

FUNCTION
FILTER

˚F˚C

“Centrally Controlled” indicator
Indicates that operation from the
remote controller has been prohibited by a master controller.

˚F˚C

WEEKLY
SIMPLE
AUTO OFF

ONLY1Hr.

Timer indicators
The indicator comes on if the corresponding timer is set.

Fan Speed indicator
Shows the selected fan speed.

“Timer is Off” indicator
Indicates that the timer is off.

Up/Down Air Direction indicator
Shows the direction of the
outcoming airflow.

Room Temperature display
Shows the room temperature. The room
temperature display range is 46–102°F.
The display blinks if the temperature
is less than 46°F or 102°F or more.

Ventilation indicator
Appears when the unit is running in
Ventilation mode.

“One Hour Only” indicator

Temperature Setting
Shows the target temperature.

Displayed if the airflow is set to
Low or downward during COOL
or DRY mode. (Operation varies
according to model.)
The indicator goes off in one hour,
at which time the airflow direction
also changes.

Louver display
Indicates the action of the swing louver.
Does not appear if the louver is not
running.

(Power On indicator)
Indicates that the power is on.

Note:

● “PLEASE WAIT” message
This message is displayed for approximately 3 minutes when power is supplied to the indoor unit or when the unit is recovering from a power failure.
● “NOT AVAILABLE” message
This message is displayed if an invalid button is pressed (to operate a function that the indoor unit does not have).
If a single remote controller is used to operate multiple indoor units simultaneously that are different types, this message will not be displayed as
far as any of the indoor units is equipped with the function.

6

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● Wireless remote controller
CHECK TEST RUN display
Indicate that the unit is being checked or
test-run.

MODEL SELECT display

display

Blinks when model is selected.

Lights up while the signal is transmitted to
the indoor unit when the button is pressed.

Temperature setting display
indicates the desired temperature setting
which is set.

CLOCK display

OPERATION MODE display

Displays the current time.

OPERATION MODE display
Indicates which operation mode is in effect.

COOL
DRY
AUTO
FAN
HEAT

display
The vertical direction of air flow is indicated.

TIMER display

CHECK TEST
MODEL RUN
SELECT
FAN

˚F
˚C
STOP AMPM

Displays when in timer operation or when
setting timer.

“

SWING

START AMPM
NOT AVAILABLE

ON/OFF

“
TEMP

”“

” display

Displays the order of timer operation.

”“

” display

Displays whether timer is on or off.

display
button

Displays selected fan speed.

Sets any desired room temperature.

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

FAN SPEED SELECT button

MODE

FAN

AUTO STOP

VANE

AUTO START

CHECK LOUVER

h

Changes the fan speed.

TEST RUN

min

MODE SELECT button
Switches the operation mode between
COOLING/DRY/FAN/HEATING and AUTO
mode.

SET

RESET

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.

CLOCK

"h" and "min" buttons

wIn case the outdoor unit is cooling only
type, the heating and auto mode are not
available.

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

LOUVER button

CHECK-TEST RUN button

Changes left / right airflow direction.
(Not available for this model.)

Performs an inspection check or test operation.
Do not use it for normal operation.

CLOCK button
VANE CONTROL button

RESET button

Changes the air flow direction.

SET button

7

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INDOOR UNIT

INDOOR UNIT

INDOOR UNIT

5

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Page 8

SPECIFICATIONS

Service Ref.
Power supply(phase, cycle, voltage)
Max. Fuse Size
Min.Circuit Ampacity
External finish
Heat exchanger
Fan
Fan(drive) o No.
Fan motor output
Fan motor

PCA-A24GA, PCA-A24GA1
Single phase, 60Hz, 208/230V
15
1
Munsell 0.70Y 8.59/0.97
Plate fin coil
Sirocco fan (direct) o 3
0.070
0.53
Dry: 14-15-16-18(495-530-565-635)
Wet: 13-14-15-16(445-480-510-570)
0(direct blow)
Remote controller & built-in
37-39-41-43
26(1-1/32)
1,310(51-9/16)
680(26-25/32)
210(8-9/32)
34(75)

A
A

kW
F.L.A

Airflow(Low-Medium2-Medium1-High) m3/min(CFM)
External static pressure
Operation control & Thermostat
Noise level(Low-Medium2-Medium1-High)
Field drain pipe O.D.
Dimensions
W
D
H
Weight

Service Ref.
Power supply(phase, cycle, voltage)
Max. Fuse Size
Min.Circuit Ampacity
External finish
Heat exchanger
Fan
Fan(drive) o No.
Fan motor output
Fan motor

Pa(mmAq)
dB
mm(in.)
mm(in.)
mm(in.)
mm(in.)
kg(lbs)

PCA-A30GA, PCA-A30GA1
Single phase, 60Hz, 208/230V
15
1
Munsell 0.70Y 8.59/0.97
Plate fin coil
Sirocco fan (direct) o 3
0.070
0.53
Dry: 14-15-16-18(495-530-565-635)
Wet:13-14-15-16(445-480-510-570)
0(direct blow)
Remote controller & built-in
37-39-41-43
26(1-1/32)
1,310(51-9/16)
680(26-25/32)
210(8-9/32)
34(75)

A
A

kW
F.L.A

Airflow(Low-Medium2-Medium1-High) K/min(CFM)
External static pressure
Operation control & Thermostat
Noise level(Low-Medium2-Medium1-High)
Field drain pipe O.D.
W
Dimensions
D
H
Weight

Service Ref.
Power supply(phase, cycle, voltage)
Max. Fuse Size
Min.Circuit Ampacity
External finish
Heat exchanger
Fan
Fan(drive) o No.
Fan motor output
Fan motor

Pa(mmAq)
dB
mm(in.)
mm(in.)
mm(in.)
mm(in.)
kg(lbs)

PCA-A36GA, PCA-A36GA1
Single phase, 60Hz, 208/230V
15
1
Munsell 0.70Y 8.59/0.97
Plate fin coil
Sirocco fan (direct) o 3
0.090
0.69
Dry: 20-21-23-25(705-740-810-885)
Wet:18-19-21-22(635-670-730-790)
0(direct blow)
Remote controller & built-in
40-41-43-45
26(1-1/32)
1,310(51-9/16)
680(26-25/32)
270(10-5/8)
37(82)

A
A

kW
F.L.A

Airflow(Low-Medium2-Medium1-High) K/min(CFM)
External static pressure
Operation control & Thermostat
Noise level(Low-Medium2-Medium1-High)
Field drain pipe O.D.
W
Dimensions
D
H
Weight

Pa(mmAq)
dB
mm(in.)
mm(in.)
mm(in.)
mm(in.)
kg(lbs)

8

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Page 9

Service Ref.
Power supply(phase, cycle, voltage)
Max. Fuse Size
Min.Circuit Ampacity
External finish
Heat exchanger
Fan
Fan(drive) o No.
Fan motor output
Fan motor

PCA-A42GA, PCA-A42GA1
Single phase, 60Hz, 208/230V
15
1
Munsell 0.70Y 8.59/0.97
Plate fin coil
Sirocco fan (direct) o 3
0.090
0.69
Dry: 20-21-23-25(705-740-810-885)
Wet:18-19-21-22(635-670-730-790)
0(direct blow)
Remote controller & built-in
40-41-43-45
26(1-1/32)
1,310(51-9/16)
680(26-25/32)
270(10-5/8)
37(82)

A
A

kW
F.L.A

Airflow(Low-Medium2-Medium1-High) K/min(CFM)
External static pressure
Operation control & Thermostat
Noise level(Low-Medium2-Medium1-High)
Field drain pipe O.D.
Dimensions
W
D
H
Weight

6

dB
mm(in.)
mm(in.)
mm(in.)
mm(in.)
kg(lbs)

NOISE CRITERION CURVES

PCA-A24GA
PCA-A30GA
PCA-A24GA1
PCA-A30GA1

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

Pa(mmAq)

NOTCH SPL(dB)
High
43
Medium1
41
Medium2
39
Low
37

LINE

PCA-A36GA
PCA-A42GA
PCA-A36GA1
PCA-A42GA1

90

90

80

80

70
NC-70

60
NC-60
50
NC-50
40
NC-40
30
NC-30
20

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

INDOOR UNIT

OC368B--1.qxp

70

LINE

NC-70

60
NC-60
50
NC-50
40
NC-40
30
NC-30
20

APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

NOTCH SPL(dB)
High
45
Medium1
43
Medium2
41
Low
40

NC-20

APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

NC-20

10

10
63

125

250

500

1000

2000

4000

63

8000

125

ceiling

3.3ft
3.3ft

250

500

1000

2000

BAND CENTER FREQUENCIES, Hz

BAND CENTER FREQUENCIES, Hz

unit

about 4.62ft

MICROPHONE

9

4000

8000

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Page 10

OUTLINES AND DIMENSIONS
Unit : inch(mm)

3-1/8(80)

PCA-A24GA1
PCA-A30GA1

5-29/32
(150)

6

2-3/4(70)

2-3/16(81)

47-13/16(1214)
51-9/16(1310)

Air outlet

5 Liquid pipe

3/8F

4 Gas pipe

5/8F

3-7/16(87)

6-3/16(157)

7-3/32(180)
8-9/32(210)

50-13/16(1290)

24/30

5/8(16)

7-3/16(182) liquid
7/15/16(201) gas
9-1/2(241) (Drainage)

2-7/32(56)

3-25/32(96)

48-13/16(1240) (Suspension bolt pitch)

MODEL

Allowing clearances
Less than
26-25/32(680)

19-29/32(506)
26-25/32(680)

10(254)

Rear wall

1/16(1)
(Gap to ceiling)
19-11/16(500)
or more

5-1/2(140)

NOTES:
Use M10 or W3/8 screw for anchor bolt.

12-5/8(320)

23/32(18)

PCA-A24GA
PCA-A30GA

Ceiling

6-3/8(161)

3-17/32(90)

48-3/8(1228)

51-9/16(1310)

4

1/16(1)

1

3-15/16(100)
20-21/32(525)
48-5/8(1235)

When electrical box
is pulled down

Electrical box

3-3/8(86)
5-7/16(138)
6-3/4(171)

10-3/8(263)
11-13/16(300)
16-3/8(416)
2-3/4(70)

7
9-1/32(229)

2

10

1-13/16(46)

2-1/8(54)

1-1/2(38)

6-7/8
(175)

5

5-5/32(131)

Ceiling

8

1-1/2(38)

9

3-1/8(79)

2-1/4(57)

[FRONT VIEW]
7/16(11)

2 Electrical box

3

1/4~9/32
(6~7)

1-1/4(32)
6-11/32(161)

1-21/32(42)

7-1/16(179)

Air intake

10-5/8(270)
or more

9-13/16(250)
Less than
11-13/16(300)
or more

1
2
3
4

Drainage pipe connection(1-1/32(26mm)I.D.)
Drainage pipe connection(for the left arrangement)
Knockout hole for left drain-piping arrangement
Refrigerant-pipe connection(gas pipe side/flared connection)

5
6
7
8
9

Refrigerant-pipe connection(liquid pipe side/flared connection)
Knockout hole for upper pipe arrangement
Knockout hole for left drain pipe arrangement
Knockout hole for wiring arrangement
Knockout hole for fresh air intake

Unit : inch(mm)

6

5-1/2(140)

2-3/4(70)

51-9/16(1310)

36/42

5 Liquid pipe

3/8F

4 Gas pipe

5/8F

8-17/32(217)

5/8(16)

10-5/8(270)

3-25/32(96)

47-13/16(1214)

MODEL

3-7/16(87)

8-5/32(207)

Air outlet

50-13/16(1290)

3-3/16(81)

48-13/16(1240)(Suspension bolt pitch)

NOTES:
Use M10 or W3/8 screw for anchor bolt.

7-3/16(182)
7-13/16(198)
9-5/8(245)

3-17/32(90)

3-3/8(86)
5-7/16(138)
6-3/4(171)

27-1/16(687)
48-5/8(1235)
2-3/4(70)

Electrical box

7
9-1/32(229)

2

11

1-25/32(45)

1-1/2(38)

5-7/8(150)
20-21/32(525)

11-13/16
(300)
or more

9-13/16(250)
Less than

4

8

10-3/8(263)
13(330)

7-7/8(200)

When electrical box
is pulled down

5 1

51-9/16(1310)

7-9/16
(196) 1/16(1)
9-9/32(236)

9

1-1/2(38)
5-1/2(140)

Ceiling

2-3/16(55)
7/16(11)

3-21/32(93)

Electrical box

6-5/16
(160)

7-2/32(289)

10-5/8(270)
or more

[FRONT VIEW]

1-21/32(42)

1/4~9/32
(6~7)

2
3

Allowing clearances
26-25/32(680)
Less than

26-25/32(680)

Ceiling

48-3/8(1228)

Air intake

gas
(Drainage)

Rear wall

2-7/32
(56)
19-29/32(506)

10(254)
6-3/8(160)

liquid

19-11/16(500)

5-29/32(150)

3-1/8(80)

PCA-A36GA1
PCA-A42GA1
23/32(18)

PCA-A36GA
PCA-A42GA

Page 11

1/16(1)
(Gap to ceiling)

07.6.20 1:01 PM

12-5/8(320)

OC368B--1.qxp

1 Drainage pipe connection(1-1/32(26mm)I.D.)
2 Drainage pipe connection(for the left arrangement)
3 Knockout hole for left drain-piping arrangement
4 Refrigerant-pipe connection(gas pipe side/flared connection)
5
6
7
8
9

Refrigerant-pipe connection(liquid pipe side/flared connection)
Knockout hole for upper pipe arrangement
Knockout hole for left drain pipe arrangement
Knockout hole for wiring arrangement
Knockout hole for fresh air intake

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Page 12

WIRING DIAGRAM

8

PCA-A24GA PCA-A30GA
PCA-A24GA1 PCA-A30GA1
[LEGEND]
SYMBOL
P.B
I.B
FUSE
ZNR
CN2L
CN32
CN41
CN51
SW1
SW2
SWE
X1
X4
BCR
LED1
LED2
LED3

PCA-A36GA
PCA-A36GA1

SYMBOL
C
MF
MV
TB4

NAME
INDOOR POWER BOARD
INDOOR CONTROLLER BOARD
FUSE (6.3A/250V)
VARISTOR
CONNECTOR
CONNECTOR
CONNECTOR
CONNECTOR
SWITCH wSee Table 1.
SWITCH wSee Table 2.
SWITCH
RELAY
RELAY
FAN CONTROL ELEMENT
POWER SUPPLY
POWER SUPPLY
TRANSMISSION

NAME
CAPACITOR
FAN MOTOR
VANE MOTOR
TERMINAL BLOCK
TERMINAL BLOCK
ROOM TEMP.THERMISTOR
<32°F/15kΩ, 77°F/5.2kΩ DETECT>
PIPE TEMP.THERMISTOR/LIQUID
<32°F/15kΩ, 77°F/5.2kΩ DETECT>
COND./EVA.TEMP.THERMISTOR
<32°F/15kΩ, 77°F/5.2kΩ DETECT>
WIRED REMOTE CONTROLLER BOARD

TB5,TB6
TH1
TH2
TH5
R.B

P.B CNDK
(RED)

SYMBOL
W.B
RU
BZ
LED1
LED2
SW1
SW2

NAME
WIRELESS REMOTE CONTROLLER BOARD(OPTION)
RECEIVING UNIT
BUZZER
LED
LED
SWITCH
SWITCH

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

CN2S
(WHT)

1
2 DC13.1V
3

MF

PCA-A42GA
PCA-A42GA1

1
2

X4

FUSE

X4

VANE
CN6V
POWER A-CONTROL (GRN)
CN2D(WHT) CN3C(BLU)

1 2

X1

ZNR

X1

S2

YLW
ORN
BRN

BRN
ORN

BLK
WHT

POWER
POWER
D.U.M
CNP 1 3 CNDK 1 3 CND 1 3
(RED)
(ORN)
(BLU)

FAN 1 3 5
(WHT)
BCR

YLW
ORN

RED
WHT

RED
WHT
BLK

C
I.B

TB4
S1

YLW
ORN

1 2 3

1 3

CN41

CN2L

CN51

CN32

6

6

24/30 TYPE
6
6
MV
36/42 TYPE
5
5

WIRELESS
CN90
(WHT)

9

S3

MV

MV

LED3 LED2 LED1

1 2

Refer to tables 1 and 2
for service PCB.

1 2

1 2

W.B

1 2
2
1

TH1

MODELS
PCA-A,GA

TH2

TH5

TRANSMISSION WIRES DC12V
R.B

TB5

Table 2

Table 1
SW1
Service board
1 2 3 4 5

ON
OFF

MODELS
PCA-A24GA
PCA-A30GA

CNB

RU
RECEIVER LED1 LED2 SW2 SW1

1 2
BLU
BLU

1 2

BLK
BLK

1 2 3

BZ

INTAKE LIQUID PIPE REMOCON
CN20 CN21
CN29 CN22
(RED) (WHT) (BLK) (BLU)

BLK
BLK

SWE
ON
OFF

D.SENSOR
CN31
(WHT)

SW2 SW1

Service board
1 2 3 4 5

1 2 3 4 5

SW2
MODELS

ON
OFF

PCA-A36GA

ON
OFF

PCA-A42GA

Service board
1 2 3 4 5

1 2 3 4 5

ON
OFF
ON
OFF

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 have polarities, make sure to match terminal numbers (S1, S2, S3)
for correct wirings.
3. Symbols used in wiring diagram above are,
: Connector,
: Terminal (block).
4. This diagram shows the wiring of Indoor and Outdoor connecting wires (specification of 230V),
adopting superimposed system of power and signal.
w1.Use copper supply wires.
[Emergency operation procedure]
When the wired remote control or the indoor unit microcomputer has failed, but all other
components work properly, if you set the switch (SWE) on the indoor control board ON, the indoor
unit will begin Emergency Operation.
When Emergency Operation is activated, indoor fan runs at high speed.

12

1 2
TB6

w1
TO OUTDOOR UNIT

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Page 13

REFRIGERANT SYSTEM DIAGRAM

PCA-A24GA PCA-A30GA
PCA-A24GA1 PCA-A30GA1

PCA-A36GA
PCA-A36GA1

PCA-A42GA
PCA-A42GA1

Strainer
#50

Heat exchanger
Refrigerant GAS pipe connection
(Flare)
Condenser/evaporator
temperature thermistor
(TH5)

Refrigerant flow in cooling
Refrigerant flow in heating

Refrigerant LIQUID pipe connection
(Flare)
Pipe temperature
thermistor/liquid
(TH2)

Room temperature
thermistor (TH1)
Distributor
with strainer
#50

Strainer
#50

13

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Page 14

TROUBLESHOOTING

10-1. TROUBLESHOOTING

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 inferior phenomenon reoccurrence at field are summarized in the table below. Check
the contents below before investigating details.

Unit conditions at service

Error code

Actions to be taken for service (summary)

Displayed

Judge what is wrong and take a corrective action
according to “SELF-DIAGNOSIS ACTION TABLE” (10-2).

The inferior phenomenon is
reoccurring.
Not displayed

Logged

The inferior phenomenon is
not reoccurring.

Not logged

Identify the cause of the inferior phenomenon and take
a corrective action according to “TROUBLESHOOTING
BY INFERIOR PHENOMENA ” (10-3).
1Consider 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
inferior phenomenon occurred, and wiring related.
2Reset error code logs and restart the unit after finishing
service.
3There is no abnormality in electrical components,
controller boards, and remote controller.
1Recheck the abnormal symptom.
2Identify the cause of the inferior phenomenon and take
a corrective action according to “TROUBLESHOOTING
BY INFERIOR PHENOMENA ” (10-3).
3Continue to operate unit for the time being if the cause
is not ascertained.
4There is no abnormality in electrical components,
controller boards, remote controller etc.

14

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Page 15

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

10-2. SELF-DIAGNOSIS ACTION TABLE
Error Code

P1

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:(194˚F) or more
Open: -40:(-40˚F) or less

Cause
1 Defective thermistor
characteristics
2 Contact failure of connector
(CN20) on the indoor controller
board (Insert failure)
3 Breaking of wire or contact
failure of thermistor wiring
4 Defective indoor controller
board

Countermeasure
1–3 Check resistance value of thermistor.
0: (32˚F)• • • • • • • • • • • 15.0k"
10:(50˚F)• • • • • • • • • • • • • 9.6k"
20:(68˚F)• • • • • • • • • • • • • 6.3k"
30:(86˚F)• • • • • • • • • • • • • 4.3k"
40:(104˚F)• • • • • • • • • • • •3.0k"
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
the indoor controller board. Refer to 10-6.
Turn the power on again and check restart
after inserting connector again.
4 Check 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.

P2

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:(194˚F) or more
Open: -40:(-40˚F) or less

1 Defective thermistor
characteristics
2 Contact failure of connector
(CN21) on the indoor controller
board (Insert failure)
3 Breaking of wire or contact
failure of thermistor wiring
4 Defective refrigerant circuit is
causing thermistor temperature
of 90:(194˚F) or more or
-40:(-40˚F) or less.
5 Defective indoor controller board

1–3 Check resistance value of thermistor.
For characteristics, refer to (P1) above.
2 Check contact failure of connector (CN21) on
the indoor controller board. Refer to 10-6.
Turn the power on and check restart after
inserting connector again.
4 Check pipe  temperature with remote
controller in test run mode. If pipe 
temperature is extremely low (in cooling
mode) or high (in heating mode), refrigerant
circuit may have defect.
5 Check pipe  temperature with remote
controller in test run mode. If there is extreme
difference with actual pipe  temperature,
replace indoor controller board.
Turn the power off, and on again to operate
after check.

P4

P5

Drain sensor (DS)
1 Suspensive abnormality, if short/open of
thermistor is detected for 30 seconds
continuously.
Turn off compressor and indoor fan.
2 Short/open is detected for 30 seconds continuously during suspensive abnormality.
(The unit returns to normal operation, if
it has been reset normally.)
3 Detect the following condition.
• During cooling and drying operation
• In case that pipe  temperature
- room temperature <-10deg
(Except defrosting)
• When pipe  temperature or
room temperature is short/open temperature.
• During drain pump operation

1 Defective thermistor
1–3 Check resistance value of thermistor.
characteristics
0: (32˚F)• • • • • • • • • • • • 6.0k"
2 Contact failure of connector
10:(50˚F)• • • • • • • • • • • • 3.9k"
(CN31) on the indoor controller
20:(68˚F)• • • • • • • • • • • • 2.6k"
board (Insert failure)
30:(86˚F)• • • • • • • • • • • • 1.8k"
3 Breaking of wire or contact
40:(104˚F)• • • • • • • • • • 1.3k"
failure of drain sensor wiring
2 Check contact failure of connector (CN31) on
4 Defective indoor controller board
the indoor controller board. Refer to 10-6.
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.

Malfunction of drain pump (DP)
1 Malfunction of drain pump
1 Suspensive abnormality, if thermistor
2 Defective drain
of drain sensor heats itself and
Clogged drain pump
temperature rises slightly. Turn off
Clogged drain pipe
compressor and indoor fan.
3 Attached drop of water at the
drain sensor
2 Drain pump is abnormal if the condition
above is detected during suspensive
• Drops of drain trickles from
abnormality.
lead wire.
• Clogged filter is causing
3 Constantly detected during drain pump
operation.
wave of drain.
4 Defective indoor controller board

15

1 Check if drain pump 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 10-6.
Turn the power off, and on again to operate
after check.

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Error Code

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Page 16

Abnormal point and detection method

Cause

Freezing/overheating protection is
working
1 Freezing protection (Cooling mode)
The unit is in 6-minute resume prevention
mode if pipe  temperature stays under
-15:(5˚F) for 3 minutes, 3 minutes after
the compressor started. Abnormal if it
stays under -15:(5˚F) for 3 minutes
again within 16 minutes after 6-minute
resume prevention mode.

(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.

5 Defective outdoor fan control
6 Overcharge of refrigerant
7 Defective refrigerant circuit
(clogs)
P6

2 Overheating protection (Heating mode)
The units is in 6-minute resume
prevention mode if pipe  temperature is detected as
over 70:(158˚F) after the compressor
started. Abnormal if the temperature of
over 70:(158˚F) is detected again within 10 minutes after 6-minute resume
prevention mode.

(Heating mode)
1 Clogged filter (reduced airflow)
2 Short cycle of air path
3 Overload (high temperature)
operation beyond 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.

P8

Pipe temperature

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 deg C[-5.4deg F]](TH-TH1)
TH: Lower temperature between liquid pipe
temperature (TH2) and
condenser/evaporator temperature
(TH5)
TH1: Intake temperature

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.

1 Slight temperature difference
between indoor room
temperature and pipe 
temperature thermistor
• Shortage of refrigerant
• Disconnected holder of pipe
 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

temperature thermistor
5 Stop valve is not opened
completely.

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 deg C[5.4deg F][(TH5-TH1)

16

Countermeasure
(Cooling or drying mode)
1 Check clogs of the filter.
2 Remove shields.

4 Measure the resistance of fan motor's winding.
Measure the output voltage of fan's connector
(FAN) on the indoor controller board.
WThe indoor controller board should be
normal when voltage of AC 208/230V is
detected while fan motor is connected.
Refer to 10-6.
5 Check outdoor fan motor.
67 Check operating condition of refrigerant
circuit.

(Heating mode)
1 Check clogs of the filter.
2 Remove shields.

4 Measure the resistance of fan motor's winding.
Measure the output voltage of fan's connector
(FAN) on the indoor controller board.
WThe indoor controller board should be
normal when voltage of AC 208/230V is
detected while fan motor is connected.
Refer to 10-6.
5 Check outdoor fan motor.
6~8Check operating condition of refrigerant
circuit.

1~4 Check pipe  temperature with room
temperature display on remote controller
and outdoor controller circuit board.
Pipe 
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.

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Page 17

Error Code

Abnormal point and detection method

Cause

Countermeasure

P9

Pipe temperature thermistor /
Condenser-Evaporator (TH5)
1 The unit is in 3-minute resume protection 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:(194˚F) or more
Open: -40:(-40˚F) or less

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:(194˚F) or more or -40:
(-40˚F) or less caused by
defective refrigerant circuit.
5 Defective indoor controller
board

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 10-6.
Turn the power on and check restart after
inserting connector again.
4 Operate in test run mode and check pipe
 temperature with
outdoor controller circuit board. If pipe
 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
 temperature with
outdoor control circuit board. If there is
exclusive difference with actual pipe
 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).

(

Remote controller transmission
error(E0)/signal receiving error(E4)
1 Abnormal if main or sub remote controller 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 for any signal for 2 minutes.
(Error code: E0)
E0
or
E4

E3
or
E5

1 Abnormal if indoor controller board can
not receive any data from remote controller board or normally 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)

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 address “0”
6 Noise has entered into the
transmission wire of remote
controller.

1 2 remote controller are set as
“main.” (In case of 2 remote
controllers)
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
1 Abnormal if indoor controller board could
6 Noise has entered into transnot find blank of transmission path.
mission wire of remote controller.
(Error code: E5)
2 Indoor controller board receives transmitted data at the same time, compares
the data,and when detecting it, judges
different data to be abnormal 30
continuous times. (Error code: E5)
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, compares the
data, and when detecting it, judges
different data to be abnormal 30
continuous times. (Error code: E3)

17

)

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 o 3 or more)
• The number of connecting indoor units:
max. 16 units
• The number of connecting remote controller: max. 2 units
When the above-mentioned problem 1~3 are not seen.
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” is displayed,
d) When “ERC 00-06” is displayed,
[ c),d)→Noise may be causing abnormality. ]
∗ If the unit is not normal after replacing
indoor controller board in group control,
the 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 1
indoor unit.
3 The address changes to a separate setting.
4~6 Diagnose remote controller.
a) When “RC OK” is displayed, remote controllers 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 displayed,
noise may be causing abnormality.

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Page 18

Error Code

Abnormal point and detection method

E6

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 as abnormal under the
following condition: When 2 or more
indoor units are connected to 1
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.

E7

Indoor/outdoor unit communication
1 Defective transmitting receiving 1-3 Turn the power off, and on again to
error (Transmitting error)
check. If abnormality generates again,
circuit of indoor controller board
Abnormal if “1” receiving is detected 30
replace indoor controller board.
2 Noise has entered into power
times continuously though indoor controller
supply.
board has transmitted “0”.
3 Noise has entered into outdoor
control wire.

Fb

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

E1
or
E2

PA
(2502)
(2500)

Cause

Countermeasure

1 Contact failure, short circuit or, ∗ Check LED display on the outdoor control circuit board. (Connect A-control service tool,
miswiring (converse wiring) of
PAC-SK52ST.)
indoor/outdoor unit connecting
Refer to EA-EC item if LED displays EA-EC.
wire
1 Check disconnection or looseness of indoor/
2 Defective transmitting receiving
outdoor unit connecting wire of indoor unit or
circuit of indoor controller board
outdoor unit.
3 Defective transmitting receiving
Check all the units in case of twin indoor
circuit of indoor controller board
unit system.
4 Noise has entered into indoor/ 2-4 Turn the power off, and on again to
check. If abnormality generates again,
outdoor unit connecting wire.
replace indoor controller board or outdoor
controller circuit board.
∗ Other indoor controller board may have
defect in case of twin indoor unit system.

1 Defective indoor controller
board

Remote controller control board
1 Defective remote controller
1 Abnormal if data cannot be normally
read from the nonvolatile memory of the
remote controller control board.
(Error code: E1)

1 Replace indoor controller board.

1 Replace remote controller.

2 Abnormal if the clock function of remote
controller cannot be normally operated.
(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:(14˚F), drain sensor detects
whether it is soaked in the water or not
at the interval of 90 seconds. (Drain
pump will start operating when the drain sensor detects 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 detects 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:(14˚F) for a
total of 30 minutes. (When the drain
sensor detects 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 Drain pump trouble

1 Check the drain pump.

2 Drain defective
· Drain pump clogging
· Drain pipe clogging

2 Please confirm whether water can be
drained.

3 Open circuit of drain sensor
side heater

3 Confirm the resistance of the drain sensor.

4 Contact failure of drain sensor
connector

4 Check the connector contact failure.

5 Dew condensation on drain
sensor
· Drain water trickles along
lead wire.
· Drain water waving due to filter
clogging

5 Check the drain sensor leadwire mounted.
Check the filter clogging.

6 Extension piping connection
difference at twin system

6 Check the piping connection.

7 Miswiring of indoor/ outdoor
connecting at twin system

7 Check the indoor/ outdoor connecting wires.

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

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

18

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Page 19

10-3. TROUBLESHOOTING BY INFERIOR PHENOMENA
Phenomena
(1)LED2 on indoor controller board
is off.

Note: Refer to the manual of outdoor unit for the detail of remote controller.
Cause
Countermeasure
• When LED1 on indoor controller board is also off.
1 Power supply of rated voltage is not supplied to out- 1 Check the voltage of outdoor power
door unit.
supply terminal block (L1,L2).
• When AC 208/230V is not detected,
check the power wiring to outdoor unit
and the breaker.
• When AC 208/230V is detected,
check 2 (below).
2 Check the voltage between outdoor
2 Defective outdoor controller circuit board
terminal block S1 and S2.
• When AC 208/230V is not detected.
—Check the fuse on outdoor controller
circuit board.
—Check the wiring connection.
• When AC 208/230V is detected,
check 3 (below).
3 Check the voltage between indoor terminal
3 Power supply of 208/230V is not supplied to indoor
unit.
block S1 and S2.
• When AC 208/230V is not detected,
check indoor/outdoor unit connecting
wire for mis-wiring.
• When AC 208/230V is detected,
check 4 (below).
4 Defective indoor power board
4 Check voltage output from CN2S on indoor
power board (DC13.1V). Refer to 10-6-1.
• 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
5 Defective indoor controller board
indoor controller board and indoor power
board. Check the fuse on indoor controller
board. If no problems are found, indoor
controller board is defective.
(For the separate indoor/outdoor unit power supply system)
1 Power supply of 208/230V 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

19

1 Check the voltage of indoor power supply
terminal block (L1,L2).
• When AC208/230V is not detected,
check the power supply wiring.
• When AC208/230V 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 referring to installation manual of an optional kit.
• When there is no problem in the
method of connecting the connectors,
check 3 (below).
3 Check voltage output from CNDK on
indoor controller board.
• When AC208/230V 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 AC208/230V 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.

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Page 20

Note: Refer to the manual of the outdoor unit for the detail of remote controller.
Phenomena
(1)LED2 on indoor controller board
is off.

Cause

Countermeasure

• 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”.)

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.

(2)LED2 on indoor controller board
is blinking.

• When LED1 on indoor controller board is also blinking. Check indoor/outdoor unit connecting wire
Connection failure of indoor/outdoor unit connecting for connection failure.
wire
• When LED1 is lit.
1 Check the connection of remote con1 Miswiring of remote controller wires
troller wires in case of twin indoor unit
Under indoor unit system, 2 indoor units are wired
system. When 2 or more indoor units are
together.
wired in one refrigerant system, connect
remote controller wires to one of those
units.
2 Refrigerant address for outdoor unit is wrong or not 2 Check the setting of refrigerant address
set.
in case of grouping control system.
Under grouping control system, there are some units
If there are some units whose refrigerant
whose refrigerant address is 0.
addresses are 0 in one group, set one of
the units to 0 using SW1 (3-6) on outdoor
controller circuit board.
3 Shortcut of remote controller wires
34 Remove remote controller wires and
4 Defective remote controller
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

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.
(4)Receiver for wireless remote
controller

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 controller board(Insert failure)
4 Contact failure of connector between wireless
remote controller board and indoor controller board

20

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 the wireless remote
controller.
2~4
Check contact failure of each connector.
If no problems are found in connector,
replace indoor controller board.
When the same trouble occurs even if
indoor controller board is replaced,
replace wireless remote controller
board.

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Page 21

10-4. WHEN WIRED REMOTE CONTROLLER OR INDOOR UNIT
MICROCOMPUTER TROUBLES
1. If there is not any other problem when trouble occurs, emergency operation starts as the indoor controller board switch
(SWE) is set to ON.
During the emergency operation the indoor unit operates with Indoor fan at high speed.
2. For emergency operation of cooling or heating
In emergency operation for COOL or HEAT, setting of the switch (SWE) in the indoor controller board and outdoor unit
emergency operation are necessary.
3. Before you activate emergency operation, check the following points:
(1) Emergency operation cannot be activated when:
· the outdoor unit malfunctions.
· the indoor fan malfunctions.
(2) Emergency operation becomes continuous only by switching the power source on / off. ON / OFF on the remote control
or temperature control etc. does not function.
(3) Avoid operating for a long time when the outdoor unit begins defrosting while emergency operation of the heating is activated, because it will start to blow cold air.
(4) Emergency cooling should be limited to 10 hours maximum. (The indoor unit heat exchanger may freeze.)
(5) After emergency operation has been deactivated, set the switches etc. to their original positions.
(6) Movement of the vanes does not work in emergency operation, therefore you have to slowly set them manually to the
appropriate position.

21

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Page 22

10-5. HOW TO CHECK THE PARTS
PCA-A24GA PCA-A30GA
PCA-A36GA
PCA-A24GA1 PCA-A30GA1
PCA-A36GA1

PCA-A42GA
PCA-A42GA1

Parts name

Check points

Room temperature
thermistor
(TH1)
Pipe temperature
thermistor
(TH2)
Condenser/evaporator
temperature thermistor
(TH5)
Fan motor (MF)
Relay connector
1

Red

2 White
3 Black

1
2

Disconnect the connector then measure the resistance using a tester.
(At the ambient temperature 10:(50˚F)~30:(86˚F))
Normal

Abnormal

4.3k"~9.6k"

Open or short

Measure the resistance between the terminals using a tester.
(Winding temperature 20:(68˚F))

PCA-A24GA(1)
PCA-A30GA(1)

Red–Black

60.8"

41.1"

White–Black

55.1"

54.3"

Vane motor (MV)
Connector

4 Orange
Red

2

Pink

M

Brown–Blue
3 6 1

Pink

Red–Orange

Normal

Abnormal

PCA-A24·30GA(1)

140~160"

Open or short

Red–Pink
Connector

M

Normal

Abnormal

PCA-A36·42GA(1)

Red–Yellow

2 Orange
5

PCA-A36GA(1)
PCA-A42GA(1)

Brown–Yellow

Yellow Brown Blue

4

Normal

Motor terminal
or
Relay connector

Abnormal

3

Protector
OFF : 130i 5:
ON : 80i 20:

5

(Refer to the next pege for a detail.)

Red–Blue

Red
Yellow

Blue

3

1

Red–Blue

140~160"

Open or short

Red–Pink

22

Open or short

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Page 23



< Thermistor for lower temperature >
50

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

Thermistor R0=15kΩ ± 3%
Fixed number of B=3480 ± 2%
1
273+t

t(:):Rt=15exp { 3480(

T(˚F):Rt=15exp { 3480(

1
)}
273

1
273+ T-32
1.8

40

Resistance (k")

Thermistor for
lower temperature

30

20

1
)}
273
10

0: (32˚F)
10: (50˚F)
20: (68˚F)
25: (77˚F)
30: (86˚F)
40:(104˚F)

15kΩ
9.6kΩ
6.3kΩ
5.4kΩ
4.3kΩ
3.0kΩ

0
-20 -10
-4 -14

0 10 20 30 40 50
32 50 68 86 104 122
Temperature

10-6.TEST POINT DIAGRAM
10-6-1. Power board
PCA-A24GA
PCA-A30GA
PCA-A24GA1
PCA-A30GA1

PCA-A36GA
PCA-A36GA1

PCA-A42GA
PCA-A42GA1
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 3 208/230V AC

23

:
˚F

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Page 24

10-6-2. Indoor controller board
PCA-A24GA
PCA-A30GA
PCA-A24GA1
PCA-A30GA1
CN2D
Connect to the indoor
power board (CN2S)
(12.5~13.7V DC)

PCA-A36GA
PCA-A36GA1
LED1
Power supply (I.B)

PCA-A42GA
PCA-A42GA1
LED2
Power supply (R.B)

LED3
Transmission (Indoor/outdoor)

CN3C
Transmission
(Indoor/outdoor)
(0~24V DC)

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

CNDK
Connect to the indoor
power board (CNSK)
(208/230V AC)

CN20
Room temperature
thermistor (TH1)
CN21
Pipe temperature
thermistor/Liquid (TH2)
CN29
Condenser/evaporator
temperature thermistor (TH5)

FUSE
(6.3 A 250 V)

CN31
Drain sensor (DS)
CND
Power supply input
(208/230V AC)

CN90
Connect to the wireless
remote controller board
(CNB)
CN6V
Vane motor output
(MV)

CNP
Drain-pump output
(DP)
(208/230V AC)

CN41
Connector (HA terminal-A)

CN51
Centrally control

CN24
Heater output
(12V DC)
CN32
Remote switch
SWE
Emergency operation

CN2L
Connector
(LOSSNAY)

FAN
Fan motor output

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

SW2
Capacity setting

24

SW1
Model setting

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Page 25

10-7. 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

Functions

Setting by the dip switch and jumper wire

Jumper wire (

: Short

: Open)

Remarks

For service board
SW1

Model
settings

SW2

Capacity
settings

1 2 3 4 5

MODELS

J41
J42

JP1

Unit type
setting

JP3

Indoor
controller
board type
setting

Service board

PCA-A24GA
PCA-A24GA1

1 2 3 4 5

PCA-A30GA
PCA-A30GA1

1 2 3 4 5

PCA-A36GA
PCA-A36GA1

1 2 3 4 5

PCA-A42GA
PCA-A42GA1

Pair number
setting with
wireless
remote
controller

ON
OFF

1 2 3 4 5

ON
OFF
ON
OFF
ON
OFF
ON
OFF

Wireless remote Control PCB setting
controller setting
J41
J42
0
1
2
3~9

Model
Without TH5
With TH5

JP1

Indoor controller board type
For product
Service parts


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

JP3

25

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Page 26

DISASSEMBLY PROCEDURE

PCA-A24GA PCA-A30GA
PCA-A36GA
PCA-A24GA1 PCA-A30GA1
PCA-A36GA1
OPERATING PROCEDURE

PCA-A42GA
PCA-A42GA1
PHOTOS & ILLUSTRATIONS

1. Removing the air intake grille
(1) Slide the intake grille holding 2 knobs backward to open
the intake grille.
(2) When the intake grille left open, push the stoppers on the
rear 2 hinges to pull out the intake grille.

Figure 1

Intake grille

slide

Intake grille
Holding knobs

Hinges
Pull out the intake grille

2. Removing the electrical box
(1) Remove the air intake grille. (See the figure 1)
(2) Remove the screw from the beam and remove the beam.
(3) Remove the screws from the electrical cover, and
remove the electrical cover.
(4) Disconnect CN6V, CN21 and CN29.
(5) Remove the screws from the electrical box and pull out
the electrical box.

Terminal block (for indoor / outdoor connecting line)
Terminal block (for power supply)
Terminal block (for remote controller)
Fan motor capacitor
Indoor control board
Power board
(There might not be TB2 depending on the model.)

Figure 2

Beam
Slide to the left

Clamp

Screw(electrical cover)
Electrical cover
Screw(electrical box)

Photo 1

Fan motor
capacitor

Power board

Indoor control
board
Terminal block
(power supply)

26

Terminal block
(remote control)
Terminal block
(Indoor / outdoor
connecting wire)

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Page 27

OPERATING PROCEDURE

PHOTOS & ILLUSTRATIONS

3. Removing the fan motor 
(1) Remove the intake grille.
(2) Disconnect the fan motor connector.
(3) Remove the screw for removing the motor support at both
left and right side.
(4) Loosen the set screws at the fan motor side of the connecting joint.
(5) Slide the fan motor  to the left side and pull it out.

Photo 2
Motor

Screws

Motor support

4. Removing the sirocco fan
(1) Remove the air intake grille.
(2) Remove 1 beam.
(3) Remove the lower casing while pressing the stoppers at
upper side of the casing.
(4) Loosen the set screws at the connecting joint.
(5) Remove the sirocco fan and shaft together by sliding the
shaft to the left.

set screws

connecting joint

Photo 3

Casing

Motor Set screw Catch

(Note)
Make sure that the upper side casing is snapped to the fan
plate securely with catch.

Connecting joint

Shaft

Sirocco fan

5. Removing the side panel
(1) Remove the air intake grille.
(2) Remove the screw from the side panel, and remove the
side panel by sliding the panel to the front.

Bearing

Screws

Figure 3
side panel

sliding the panel
to the front

screw

27

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Page 28

OPERATING PROCEDURE

PHOTOS

6. Removing the vane motor 
(1) Remove the air intake grille. (See the figure 1)
(2) Remove the left side panel. (See the figure 3)
(3) Remove the relay connector of vane motor.
(4) Remove the electrical box.
(5) Remove the screws of vane motor, then remove vane
motor .
(Note)
Connect the lead wires and connectors properly and place
them in the proper position so that the wires are not pinched
by other parts.

Photo 4
Relay connector of
the vane motor

Screw

Vane motor

7. Removing the Indoor coil thermistor 
(1) Remove the air intake grille. (See the figure 1)
(2) Remove the right side panel. (See the figure 3)
(3) Remove the relay connector of the pipe thermistor
.
(4) Remove the screw, and remove the check panel.
(5) Extract the indoor coil thermistor  from the
holder.

There is a possibility for the short circuit when connector gets
wet by water through the thermistor lead wire.
Therefore, lead wire of the indoor coil thermistor 
should be tied as shown in the photo 6.

Photo 5
Screw

Photo 6

Photo 7

Indoor coil thermistor
Screws

Under panel

28

Relay connector of
the pipe thermistor

Left side
panel

Hold

8. Removing the Under panel
(1) Remove the air intake grille. (See the figure 1)
(2) Remove the beam.
(3) Remove the side panel (right and left). (See the figure 3)
(4) Remove the 9 screws of the under panel, then remove
the under panel.
w Weight of the under panel : Approx. 2kg.

Check
panel

Clamp

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Page 29

OPERATING PROCEDURE

PHOTOS

9. Removing the drain pan
(1) Remove the air intake grille. (See the figure 1)
(2) Remove the beam.
(3) Remove the side panels of right and left. (See the figure 3)
(4) Remove the under panel. Remove the screws of the right
and left side drain pan.
(5) Remove the 2 insulations in centre of the drain pan, and
after removing the 2 screws, remove the drain pan.

Photo 8

(Note)
Please be aware that there might be drain left in the drain
pan when you remove the drain pump (option).

Screw

10. Removing the guide vane
(1) Remove the intake grille. (See the figure 1)
(2) Remove the beam.
(3) Remove the side panels (right and left). (See the figure 3)
(4) Remove the under panel. (See the photo 7)
(5) Remove the drain pan. (See the photo 8)
(6) Remove the screw from the guide vane, then remove the
guide vane.

Drain pan

Screw
(Insulation)

Screw

Photo 9

Drain pan

Screw
Guide vane

Photo 10
11. Removing the Auto vane
(1) Remove the intake grille. (See the figure 1)
(2) Remove the left side panel. (See the figure 3)
(3) Remove the left side box.
(4) Remove the under panel.
(5) Remove the screw from the auto vane.
(6) Slide the auto vane to the right side and pull the auto
vane out.

Screw
Auto vane

29

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Page 30

OPERATING PROCEDURE

PHOTOS

12. Removing the heat exchanger
(1) Remove the air intake grille. (See the figure 1)
(2) Remove the beam.
(3) Remove the side panel (right and left). (See the figure 3)
(4) Disconnect the relay connector of the pipe thermistor.
(5) Remove the under panel. (See the photo 7)
(6) Remove the drain pan. (See the photo 8)
(7) Unscrew the screw of the pipe cover, and remove the
pipe cover.
(8) Unscrew the screw of the pipe support, and remove the
pipe support.
(9) Unscrew the screw of the heat exchanger, and remove
the heat exchanger.
Remove the heat exchanger with care. Since this is quite
heavy, removing work should be done with more than 2
people.
wWeight of heat exchanger : Approx. 5.3kg

30

Photo 11

Pipe
support

Screws

Pipe cover

Screws

Heat
exchanger

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12

Page 31

PARTS LIST (non-RoHS compliant)

FAN AND FUNCTIONAL PARTS
PCA-A24GA PCA-A30GA
PCA-A36GA PCA-A42GA
16

1
15

2
3
4
5

14
13
12

11
6

7
8

No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16

Parts No.
R01
R01
R01
T7W
T7W
R01
R01
R01
R01
R01
R01
R01
R01
R01
T7W
T7W
R01
R01
R01
R01
R01
R01
T7W
T7W

29J
35J
43E
30J
E14
700
E17
E19
E26
29J
E00
29J
35J
17J
E20
E15
17J
35J
E15
E20
E27
17J
H23
H24

130
130
126
762
762
116
114
114
202
100
103
145
145
524
529
529
110
110
114
114
202
202
480
480

Parts Name

10

9

Specifications

MOTOR LEG
MOTOR LEG
PIECE(MOTOR)
FAN MOTOR
D09C4P70MS
FAN MOTOR
D10C4P90MS
SHAFT JOINT
SIROCCO FAN
SIROCCO FAN
ROOM TEMPERATURE THERMISTOR
SHAFT
SLEEVE BEARING
BEARING SUPPORT
BEARING SUPPORT
DRAIN PLUG
DRAIN PAN ASSY
DRAIN PAN ASSY
CASING
CASING
SIROCCO FAN
SIROCCO FAN
LIQUID PIPE TEMPERATURE THERMISTOR
COND/EVA TEMPERATURE THERMISTOR
HEAT EXCHANGER
HEAT EXCHANGER

31

Q'ty/set
PCA-A
24/30
36/42
GA

Remarks
(Drawing No.)

Wiring RecomDiagram mended
Symbol
Q'ty

1
1
1
1
2
1
1
1
1
1
1

1
1
1
1
2
1
1
1

MF
MF

TH1

1
1
1

3
3
1
1
1
1

1
1
1
1

TH2
TH5

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STRUCTURAL PART
PCA-A24GA
PCA-A30GA
PCA-A36GA
PCA-A42GA

Page 32

24 23 22 21

20

19
18

1
2
3
4
5

17
16
15
14
13
12

6
7

11
8

9 10

Part numbers that are circled are not shown in the figure.
Q'ty/set

No.

Parts No.

R01
1 R01
2 R01
T7W
3
T7W
T7W
4
T7W
5 R01
6 R01
7 R01
8 R01
9 R01
10 T7W
T7W
11
T7W
R01
12
R01
13 R01
T7W
14
T7W
R01
15
R01
T7W
16
T7W
R01
17
R01
R01
18
R01
19 R01
20 R01
21 R01
T7W
22
T7W
R01
23
R01
R01
24
R01
25 R01
26 T7W

17J
35J
17J
E01
E00
E05
E00
17J
17J
17J
A14
29J
E01
E01
E00
17J
35J
17J
E05
E01
17J
35J
E05
E00
29J
E03
E00
E01
37J
37J
37J
E01
051
17J
E00
29J
35J
17J
E00

662
662
809
666
666
676
676
061
054
691
500
669
070
665
665
661
661
808
668
668
067
067
651
651
002
002
033
033
085
087
086
501
501
068
068
223
223
523
072

Parts Name

Specifications

LEFT SIDE PANEL
LEFT SIDE PANEL
LEFT LEG
S.PLATE-L
S.PLATE-L
REAR PANEL
REAR PANEL
GRILLE HINGE
GRILLE CATCH
GRILLE ASSY
L.L FILTER
UNDER PANEL
W.BOARD CASE
S.PLATE-R
S.PLATE-R
RIGHT SIDE PANEL
RIGHT SIDE PANEL
RIGHT LEG
SERVICE PANEL
SERVICE PANEL
RIGHT SIDE BOX
RIGHT SIDE BOX
FRONT PANEL
FRONT PANEL
AUTO VANE
AUTO VANE
VANE SUPPORT
VANE SUPPORT
G.V ASSY-6R
G.V ASSY-6C
G.V ASSY-6L
AIR FILTER
AIR FILTER
LEFT SIDE BOX
LEFT SIDE BOX
VANE MOTOR
VANE MOTOR
JOINT SOCKET
DRAIN HOSE COVER

32

PCA-A
24/30
36/42
GA
1
1
1
1
1
1
1
1
4
4
4
4
2
2
2
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1

Remarks
(Drawing No.)

Wiring RecomDiagram mended
Symbol
Q'ty

MV
MV

OC368B--2.qxp

07.6.20 0:59 PM

Page 33

ELECTRICAL PARTS
PCA-A24GA
PCA-A30GA
PCA-A36GA
PCA-A42GA
6

1

2
3
4
5

TEMP.

ON/OFF

8

7

No.

1

Parts No.

Parts Name

Specifications

T7W E18 255 CAPACITOR

4= 440V

T7W E19 255 CAPACITOR

5= 440V

2 T7W E56 310 INDOOR CONTROLLER BOARD

Q'ty/ set
PCA-A
36/42
24/30
GA
1

Remarks
(Drawing No.)

Wiring RecomDiagram mended
Symbol
Q'ty

C

1

C

1

1

I.B

3 T7W E41 716 TERMINAL BLOCK

3P(L1,L2,GR)

1

1

TB2

4 R01

E18

246 TERMINAL BLOCK

3P(S1,S2,S3)

1

1

TB4

5 R01

E21

246 TERMINAL BLOCK

2P(1,2)

1

1

TB5

6 T7W E35 313 POWER BOARD

1

1

P.B

7 T7W A01 305 REMOTE CONTROLLER CORD

1

1

1

1

8 T7W E14 713 REMOTE CONTROLLER

PAR-21MAA

33

R.B

OC368B--2.qxp

13

07.6.20 0:59 PM

Page 34

RoHS PARTS LIST

FAN AND FUNCTIONAL PARTS
PCA-A24GA1 PCA-A30GA1
PCA-A36GA1 PCA-A42GA1
16

1
15

2
3
4
5

14
13
12

11
6

7

No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16

RoHS

8

G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G

Parts No.
R01
R01
R01
T7W
T7W
R01
R01
R01
R01
R01
R01
R01
R01
R01
T7W
T7W
R01
R01
R01
R01
R01
R01
T7W
T7W

30J
32J
45E
40J
E31
800
E17
E19
H08
30J
E02
30J
36J
18J
E30
E31
18J
19J
E15
E20
H10
H09
H23
H24

130
130
126
762
762
116
114
114
202
100
103
145
145
524
529
529
110
110
114
114
202
202
480
480

Parts Name

10

9

Specifications

MOTOR LEG
MOTOR LEG
PIECE(MOTOR)
FAN MOTOR
D09C4P70MS
FAN MOTOR
D10C4P90MS
SHAFT JOINT
SIROCCO FAN
SIROCCO FAN
ROOM TEMPERATURE THERMISTOR
SHAFT
SLEEVE BEARING
BEARING SUPPORT
BEARING SUPPORT
DRAIN PLUG
DRAIN PAN ASSY
DRAIN PAN ASSY
CASING
CASING
SIROCCO FAN
SIROCCO FAN
LIQUID PIPE TEMPERATURE THERMISTOR
COND/EVA TEMPERATURE THERMISTOR
HEAT EXCHANGER
HEAT EXCHANGER

34

Q'ty/set
PCA-A
24/30
36/42
GA1

Remarks
(Drawing No.)

Wiring RecomDiagram mended
Symbol
Q'ty

1
1
1
1
2
1
1
1
1
1
1

1
1
1
1
2
1
1
1

MF
MF

TH1

1
1
1

3
3
1
1
1
1

1
1
1
1

TH2
TH5

OC368B--2.qxp

07.6.20 0:59 PM

Page 35

STRUCTURAL PART
PCA-A24GA1
PCA-A30GA1
PCA-A36GA1
PCA-A42GA1

24 23 22 21

20

19
18
17
16
15
14
13
12

1
2
3
4
5

6
7

11
8

9 10

No.

RoHS

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

G
1 G
2 G
G
3
G
G
4
G
5 G
6 G
7 G
8 G
9 G
10 G
G
11
G
G
12
G
13 G
G
14
G
G
15
G
G
16
G
G
17
G
G
18
G
19 G
20 G
21 G
G
22
G
G
23
G
G
24
G
25 G
26 G

Parts No.
R01
R01
R01
T7W
T7W
T7W
T7W
R01
R01
R01
R01
R01
T7W
T7W
T7W
R01
R01
R01
T7W
T7W
R01
R01
T7W
T7W
R01
R01
R01
R01
R01
R01
R01
T7W
T7W
R01
R01
R01
R01
R01
T7W

18J
36J
18J
E02
E03
E07
E08
18J
19J
19J
A29
30J
E02
E03
E04
18J
36J
18J
E10
E11
18J
36J
E08
E09
30J
E14
E02
E03
38J
38J
38J
E03
E04
18J
E01
E10
E12
18J
E01

662
662
809
666
666
676
676
061
054
691
500
669
070
665
665
661
661
808
668
668
067
067
651
651
002
002
033
033
085
087
086
501
501
068
068
223
223
523
072

Parts Name

Specifications

LEFT SIDE PANEL
LEFT SIDE PANEL
LEFT LEG
S.PLATE-L
S.PLATE-L
REAR PANEL
REAR PANEL
GRILLE HINGE
GRILLE CATCH
GRILLE ASSY
L.L FILTER
UNDER PANEL
W.BOARD CASE
S.PLATE-R
S.PLATE-R
RIGHT SIDE PANEL
RIGHT SIDE PANEL
RIGHT LEG
SERVICE PANEL
SERVICE PANEL
RIGHT SIDE BOX
RIGHT SIDE BOX
FRONT PANEL
FRONT PANEL
AUTO VANE
AUTO VANE
VANE SUPPORT
VANE SUPPORT
G.V ASSY-6R
G.V ASSY-6C
G.V ASSY-6L
AIR FILTER
AIR FILTER
LEFT SIDE BOX
LEFT SIDE BOX
VANE MOTOR
VANE MOTOR
JOINT SOCKET
DRAIN HOSE COVER

35

Q'ty/set
PCA-A
24/30 36/42
GA1
1
1
1
1
1
1
1
1
4
4
4
4
2
2
2
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1

Remarks
(Drawing No.)

Wiring RecomDiagram mended
Symbol
Q'ty

MV
MV

OC368B--2.qxp

07.6.20 0:59 PM

Page 36

ELECTRICAL PARTS
PCA-A24GA1
PCA-A30GA1
PCA-A36GA1
PCA-A42GA1

6

1

2
3
4
5

TEMP.

ON/OFF

8

No.

1

RoHS

7

Parts No.

Parts Name

G T7W E18 255 CAPACITOR
G T7W E19 255 CAPACITOR

Specifications
4= 440V

Q'ty/ set
PCA-A
24/30 36/42
GA1
1

Wiring RecomDiagram mended
Symbol
Q'ty

C

1

5= 440V

2 G T7W E56 310 INDOOR CONTROLLER BOARD

Remarks
(Drawing No.)

C

1

1

I.B

3 G T7W E41 716 TERMINAL BLOCK

3P(L1,L2,GR)

1

1

TB2

4 G R01

E18

246 TERMINAL BLOCK

3P(S1,S2,S3)

1

1

TB4

5 G R01

E21

246 TERMINAL BLOCK

2P(1,2)

1

1

TB5

6 G T7W E35 313 POWER BOARD

1

1

P.B

7 G T7W A01 305 REMOTE CONTROLLER CORD

1

1

8 G T7W E14 713 REMOTE CONTROLLER PAR-21MAA

1

1

R.B

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

CCopyright 2006 MITSUBISHI ELECTRIC ENGINEERING CO., LTD.
Distributed in Jun. 2007 No.OC368 REVISED EDITION-B PDF 9
Distributed in Aug. 2006 No.OC368 REVISED EDITION-A PDF 9
Distributed in Feb. 2006 No.OC368 PDF 10
Made in Japan

New publication, effective Jun. 2007
Specifications subject to change without notice.



---

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