Wiring Diagram - Mitsubishi Electric Mr. Slim PLA-A12BA4 Service Manual

7

WIRING DIAGRAM

INDOOR UNIT
PLA-A12BA4
PLA-A30BA4
[LEGEND]
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) See table 1
SW2 SWITCH (CAPACITY CODE) See table 2
SWE CONNECTOR (EMERGENCY OPERATION)
X1 RELAY (DRAIN PUMP)
DP DRAIN PUMP
FS DRAIN FLOAT SWITCH
RFI RADIO FREQUENCY INTERFACE FOR RF THERMOSTAT
<Table 2>SW2 (CAPACITY CODE)
SW2
MODELS Service MODELS
1 2 3 4 5
PLA-A12BA4 PLA-A30BA4
ON
OFF
1 2 3 4 5
PLA-A18BA4 PLA-A36BA4
ON
OFF
1 2 3 4 5
PLA-A24BA4 ON PLA-A42BA4
OFF
■
The black square ( ) indicates a switch position.
I.B
VANE CNV (WHT )
20 18 16 14 12 10 8 6 4 2
19 17 15 13 11 9 7 5 3 1
WIRELESS
1 3
CN90
CN3G
(WHT )
1 9
(BLK )
9
CNB
5 5 5 5
BZ
LED2
SW1
M M M M
LED1
SW2
MV MV MV MV
RU
W.B
GRILLE
Notes: 1. SymboIs used in wiring diagram above are,
2. Indoor and outdoor connecting wires are made with poIarities, 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 wires.
PLA-A18BA4
PLA-A36BA4
SYMBOL
MF FAN MOTOR
MV VANE MOTOR
TB4
TERMINAL BLOCK (INDOOR/OUTDOOR CONNECTING LINE)
TB5,TB6 TERMINAL BLOCK (REMOTE CONTROLLER
TRANSMISSION LINE)
TH1
ROOM TEMP. THERMISTOR
(32°F / 15kΩ, 77°F / 5.4kΩ DETECT)
TH2 PIPE TEMP. THERMISTOR/LIQUID
(32°F / 15kΩ, 77°F / 5.4kΩ DETECT)
TH5
COND. / EVA. TEMP. THERMISTOR
(32°F / 15kΩ, 77°F / 5.4kΩ DETECT)
OPTION PART
W.B PCB FOR IR WIRELESS REMOTE CONTROLLER
BZ BUZZER
LED1 LED (OPERATION INDICATION : GREEN)
LED2 LED (PREPARATION FOR HEATING : ORANGE)
RECEIVING UNIT
RU
SW1 EMERGENCY OPERATION (HEAT / DOWN)
SW2 EMERGENCY OPERATION (COOL / UP)
R.B WIRED REMOTE CONTROLLER BOARD
TB6 TERMINAL BLOCK (REMOTE CONTROLLER
TRANSMISSION LINE)
Service
1 2 3 4 5
Refer to tables 1 and 2
ON
OFF
1 2 3 4 5
ON
OFF
1 2 3 4 5
2 1
ON
OFF
TB6
R.B
J41 J42
CN32
SW1 SW2
(WHT )
CN51 (WHT ) CN24 (YLW )
Pair No.
5
CN41 (WHT )
CN2L
2 1
4
LED3 LED2 LED1
SWE
ON OFF
I-SEE I-SEE
FLOAT SW
CN105
SENSOR SENSOR MOTOR
CN4Y CN6Y (RED )
(WHT )
(RED )
1 4 1 6 1 5 1
5
5
4
M FS
I-SEE
RFI
SENSOR
MT
I-SEE SENSOR
CORNER PANEL
(OPTION PART)
: Connector,
PLA-A24BA4
PLA-A42BA4
NAME
<Table 1>SW1 (MODEL SELECTION)
TB5
SW1
2
Service
1
1 2 3 4 5
ON
TRANSMISSION
OFF
WIRES
2
DC12V
1 3
1 3
INDOOR/OUTDOOR
COMMUNICATION
2
1 1
CN3C
RECTIFICATION
(BLU)
1 2
REMOCON
1
CN22
(BLU)
LIQUID/PIPE INTAKE
FAN
CN30
CN4F CN44 CN20
CNMF
(GRN )
(WHT ) (WHT ) (RED )
(WHT )
4 1 4 1 2 7
1 3
t° t° t°
TH2 TH5 TH1
Be sure to turn off the source power
and then disconnect fan motor connector.
(Failure to do so will cause trouble in Fan motor)
: Terminal block .
13
YLW
ORN
1 3 5
OUTDOOR
CN01
ORN
(BLK)
BRN
FUSE
DC280V
X1
D.U.M
CNAC
CNP
4 1 3 1 1 3
(WHT )
(BLU )
M
MS
1~
3~
DP
MF
1
TB4
YLW
S1
TO
ORN
S2 OUTDOOR
UNIT
S3