Mitsubishi Electric PLA-A12BA Service Manual page 14

INDOOR UNIT
PLA-A12BA PLA-A18BA
1
[LEGEND]
SYMBOL
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)
DSA SURGE ABSORBER
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)
VARISTOR
DP
DRAIN-UP MACHINE
FS DRAIN FLOAT SWITCH
<Table 2>SW2(CAPACITY CODE)
SW2
MODELS Service MODELS
1 2 3 4 5
PLA-A12BA PLA-A30BA
ON
OFF
1 2 3 4 5
PLA-A18BA ON PLA-A36BA
OFF
1 2 3 4 5
PLA-A24BA ON PLA-A42BA
OFF
I.B
VANE CNV(WHT)
20 18 16 14 12 10 8 6 4
19 17 15 13 11 9 7 5 3
WIRELESS
CN90
1 3
(WHT)
CN3G
1 9
(BLK)
9
CNB
BZ
5 5 5 5
LED2
SW1
M M M M
SW2 LED1
MV MV MV MV
RU
GRILLE W.B
Notes:
[Self-diagnosis]
PLA-A24BA
1
NAME
Service
1 2 3 4 5
Refer to tables 1 and 2.
ON
OFF
1 2 3 4 5
ON
OFF
TRANSMISSION
2 1
1 2 3 4 5
WIRES
ON
TB6
DC12V
OFF
R.B
J41 J42
2
SW1 SW2
CN51(WHT)
1
Pair No.
5
CN41(WHT)
CN2L
2 1
4
LED3 LED2 LED1
SWE
ON OFF
I-SEE I-SEE
FLOAT SW
SENSOR SENSOR MOTOR
CNAC
CN4Y CN6Y
(WHT)
(WHT) (RED)
1 4 1 6 3 1
4 5
M
I-SEE
SENSOR
MT
I-SEE SENSOR
CORNER PANEL
(OPTIONAL PART)
PLA-A30BA
1 1
SYMBOL
MF FAN MOTOR
MV VANE MOTOR
TB4 TERMINAL BLOCK (INDOOR/OUTDOOR CONNECTING LINE)
TERMINAL BLOCK (REMOTE CONTROLLER
TRANSMISSION LINE)
TH1 ROOM TEMP. THERMISTOR
TH2 PIPE TEMP. THERMISTOR/LIQUID
TH5 COND. / EVA. TEMP. THERMISTOR
OPTION PART
W.B PCB FOR WIRELESS REMOTE CONTROLLER
BZ BUZZER
LED1 LED (OPERATION INDICATION : GREEN)
LED2 LED (PREPARATION FOR HEATING : ORANGE)
RU RECEIVING UNIT
SW1 EMERGENCY OPERATION (HEAT / DOWN)
SW2 EMERGENCY OPERATION (COOL / UP)
<Table 1>SW1(MODEL SELECTION)
SW1
TB5
Service
2
1 2 3 4 5
1
ON
OFF
CN32
(WHT)
1 3
1 3
CN24(YLW)
INDOOR/OUTDOOR
COMMUNICATION
1 2 1
CN3C
(BLU)
1 2
REMOCON
1
CN22
RECTIFICATION
(BLU)
LIQUID/PIPE INTAKE
CN30
CN4F CN44 CN20
(GRN)
(WHT) (WHT) (RED)
1 4 1 4 1 2 1 3 7
t t t
FS TH2 TH5 TH1
and then disconnect fan motor connector.
14
PLA-A36BA
1
NAME
1 3 5
OUTDOOR
CN01
(BLK)
DSA
FUSE
U
ZNR02
DC280V
U
ZNR01
YLW
ORN
X1
FAN
CNMF
(WHT )
ORN
D.U.M
4 1 3 1
CNP BRN
(BLU)
M
MS
1~
3~
DP
MF
PLA-A42BA
1
1
TB4
YLW
S1
TO
ORN
S2 OUTDOOR
UNIT
S3