Mitsubishi Electronics PCA-A24GA 8WIRING DIAGRAM

12
PCA-A24GA PCA-A30GA PCA-A36GA PCA-A42GA
PCA-A24GA1PCA-A30GA1PCA-A36GA1PCA-A42GA1
[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.
SWE
ON
OFF
SW2 SW1
Refer to tables 1 and 2
for service PCB.
D.SENSOR
CN31
(
WHT
)
123
INTAKE
CN20
(
RED
)
1 2
TH1
LIQUID
CN21
(
WHT
)
1 2
TH2
1 2
PIPE
CN29
(
BLK
)
1 2
TH5
1 2
BLK BLK BLK BLK BLU BLU
REMOCON
CN22
(
BLU
)
1 2
2
1
TB5
TRANSMISSION WIRES DC12V
R.B
TB6
12
CN41 CN2L
CN51 CN32
WIRELESS
CN90
(
WHT
)
VANE
CN6V
(
GRN
)
24/30 TYPE
36/42 TYPE
MV
66
9
MV
66
MV
55
W.B
BZ CNB
RECEIVER
RU LED1 LED2 SW2SW1
1 3
BRN
ORN
A-CONTROL
CN3C(BLU)
1 2
BLK WHT
POWER
CN2D(WHT)
LED3 LED2 LED1
X4 X1
1 31 31 3
ZNR
FUSE
WHT RED YLW ORN
POWER
CNDK
(RED)
POWER
CND
(ORN)
D.U.M
CNP
(BLU)
X1
FAN
(
WHT
)1 3 5
1 2 3
BLK WHT RED
C
MF
BCR
X4
I.B
1
21 2
3
P.B
CNDK
(RED)
DC13.1V
CN2S
(WHT)
TO OUTDOOR UNIT
TB4
S1
S2
S3
YLW
ORN
YLW
ORN
BRN
SW1 SW2
Table 1 Table 2
Service board Service board MODELS
PCA-A,GA
1 2 3 4 5
ON
OFF
1 2 3 4 5
ON
OFF
MODELS
PCA-A24GA
1 2 3 4 5
ON
OFF
PCA-A30GA
Service board
1 2 3 4 5
ON
OFF
MODELS
PCA-A36GA
1 2 3 4 5
ON
OFF
PCA-A42GA
Please set the voltage using the remote
controller.
For the setting method, please refer to
the indoor unit Installation Manual.
P.B INDOOR POWER BOARD
SYMBOL NAME
[LEGEND]
I.B INDOOR CONTROLLER BOARD
FUSE FUSE (6.3A/250V)
ZNR VARISTOR
CN2L CONNECTOR<LOSSNAY>
CN32 CONNECTOR<REMOTE SWITCH>
CN41 CONNECTOR<HA TERMINAL-A>
CN51 CONNECTOR<CENTRALLY CONTROL>
SW1 SWITCH <MODEL SELECTION>wSee Table 1.
SW2 SWITCH <CAPACITY CODE>wSee Table 2.
SWE SWITCH<EMERGENCY OPERATION>
X4 RELAY<FAN MOTOR>
X1 RELAY<DRAIN PUMP>
BCR
POWER SUPPLY<R.B>
LED1 POWER SUPPLY<I.B>
LED2 TRANSMISSION<INDOOR-OUTDOOR>LED3
FAN CONTROL ELEMENT
C CAPACITOR<FAN MOTOR>
FAN MOTOR
VANE MOTOR
MF
MV
SYMBOL NAME
TB4 TERMINAL BLOCK<INDOOR/OUTDOOR
CONNECTING LINE>
TERMINAL BLOCK<REMOTE CONTROLLER
TRANSMISSION LINE >
ROOM TEMP.THERMISTOR
<32
°
F/15k Ω , 77
°
F/5.2k Ω DETECT>
PIPE TEMP.THERMISTOR/LIQUID
<32
°
F/15k Ω , 77
°
F/5.2k Ω DETECT>
COND./EVA.TEMP.THERMISTOR
<32
°
F/15k Ω , 77
°
F/5.2k Ω DETECT>
TB5,TB6
TH5
TH1
TH2
W.B
WIRELESS REMOTE CONTROLLER BOARD(OPTION)
RECEIVING UNIT
BUZZER
LED<RUN INDICATOR >
LED<HOT ADJUST>
SWITCH<HEATING ON/OFF>
SWITCH<COOLING ON/OFF>
WIRED REMOTE CONTROLLER BOARD
R.B
RU
BZ
LED1
LED2
SW1
SW2
NAMESYMBOL
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.
w1
8WIRING DIAGRAM
OC368B--1.qxp 07.6.20 1:01 PM Page 12