Pca-A24Ka4; Pca-A30Ka4 - Mitsubishi Electric Mr.SLIM PCA Series Service Manual

7 WIRING DIAGRAM
PCA-A24KA4.TH
SYMBOL NAME
I.B INDOOR CONTROLLER BOARD
CN2L CONNECTOR (LOSSNAY)
CN24 CONNECTOR (BACK-UP HEATING)
CN30 CONNECTOR (LLC)
CN32 CONNECTOR (REMOTE SWITCH)
CN41 CONNECTOR (HA TERMINAL-A)
CN51 CONNECTOR (CENTRALLY CONTROL)
CN105 CONNECTOR (RADIO FREQUENCY INTERFACE)
FUSE FUSE (T6.3AL250V)
LED1 POWER SUPPLY (I.B)
LED2 POWER SUPPLY (R.B)
LED3 TRANSMISSION (INDOOR-OUTDOOR)
SW1
SWITCH (MODEL SELECTION)
SW2
SWITCH (CAPACITY CODE)
SWE CONNECTOR (EMERGENCY OPERATION)
X1
RELAY (DRAIN PUMP)
MF FAN MOTOR
MV VANE MOTOR
RFI RADIO FREQUENCY INTERFACE FOR RF THERMOSTAT
The black square(■)indicates a switch position.
<Table 1> <Table 2>
SW1(MODEL SELECTION) SW2(CAPACITY CODE)
SW1
MODELS
Manufacture/Service

PCA-A24KA4

1 2 3 4 5
ON
OFF

PCA-A30KA4

I.B
20 18 16 14 12 10 8 6 4
19 17 15 13 11 9 7 5 3
VANE
CNV
(WHT)
I-SEE
SENSOR
WIRELESS
CN4Y
CN90
(WHT)
(WHT)
1 9 1 4
5
4
9
5
CNB
BZ I-SEE
SENSOR
M
SW1 LED2 I-SEE SENSOR
(OPTION PART)
MV
SW2 LED1
RU
W.B
(OPTION PART)
Notes: 1.Symbols used in wiring diagram above are,
2.Indoor and outdoor connecting wires are made with polarities, make wiring matching terminal numbers (S1, S2, S3).
3.Since the outdoor side electric wiring may change, be sure to check the outdoor unit electric wiring for servicing.
1:Use copper supply wire.
OCH501
PCA-A30KA4.TH
SYMBOL
TB4 TERMINAL BLOCK (INDOOR/OUTDOOR CONNECTING LINE)
TERMINAL BLOCK (REMOTE CONTROLLER
TB5
TRANSMISSION LINE)
TH1 ROOM TEMP. THERMISTOR
(32ºF / 15kΩ, 77ºF / 5.4kΩ DETECT)
TH2 PIPE TEMP. THERMISTOR/LIQUID
(32ºF / 15kΩ, 77ºF / 5.4kΩ DETECT)
TH5 COND. / EVA. TEMP. THERMISTOR
(32ºF / 15kΩ, 77ºF / 5.4kΩ DETECT)
OPTION PARTS
PCB FOR IR WIRELESS REMOTE CONTROLLER
W.B
BZ BUZZER
LED1 LED (OPERATION INDICATION : GREEN)
See table 1
LED2 LED (PREPARATION FOR HEATING : ORANGE)
See table 2
RECEIVING UNIT
RU
SW1 EMERGENCY OPERATION (HEAT)
SW2 EMERGENCY OPERATION (COOL)
DP DRAIN PUMP
FS DRAIN FLOAT SWITCH
R.B WIRED REMOTE CONTROLLER BOARD
TB6 TERMINAL BLOCK (REMOTE CONTROLLER
TRANSMISSION LINE)
MT I-SEE SENSOR MOTOR
SW2
Manufacture/Service MODELS Manufacture/Service
1 2 3 4 5 1 2 3 4 5
PCA-A36KA4
ON
OFF
1 2 3 4 5 1 2 3 4 5
PCA-A42KA5
ON
OFF
Refer to tables 1 and 2
J41 J42
2 SW1 SW2
1
CN51(WHT)
Pair No.
5
CN2L
(RED)
2 1
LED3 LED2 LED1
ON OFF
I-SEE
SENSOR MOTOR
FLOAT SW
CN6Y CN105
CN4F
(RED) (RED)
(WHT)
1 6 1 5 1 4
5
When attaching When attaching
M
drain pump
drain pump
RFI
(Option part),
(Option part)
MT
remove the
FLOAT SW
jumper
CN4F
connector
(WHT)
CN4F and fit
the drain float
switch (FS).
PCA-A36KA4.TH
NAME
(OPTION PART)
TB5
1
ON
2
OFF
TRANSMISSION
WIRES
ON DC12V
OFF 2
CN32
(WHT)
1 3
3
1
CN24
INDOOR/OUTDOOR
(YLW)
COMMUNICATION
CN3C
1 2 1
(BLU)
CN41(WHT)
1 2
REMOCON
4 1
CN22
SWE (BLU)
LIQUID/PIPE INTAKE
CN30
CN44 CN20
(WHT) (RED) (GRN)
1 3
1 4 1 2
tº tº tº
TH2 TH5 TH1
Be sure to turn off the source power
1 4
and then disconnect fan motor connector CNMF.
(Failure to do so will cause trouble in fan motor)
FS
:Connector, :Terminal block.
12
PCA-A42KA5.TH
R.B
TB4
TB6
YLW YLW
1
S1
ORN ORN
2
S2
S3
ORN
BRN
1 3 5
OUTDOOR
CN01
(BLK)
DC294~325V
RECTIFICATION
FUSE
X1
FAN
CNMF
(WHT )
DP
3 1
7 4 1
CNP
(BLU)
M
MS
3~ 1~
DP (OPTION PART)
MF
1
TO OUTDOOR
UNIT