Mitsubishi Electric Mr.SLIM PKA-A12GA Service Manual page 16

PKA-A12GA PKA-A18GA
2
[LEGEND]
SYMBOL NAME
P.B INDOOR POWER BOARD
I.B INDOOR CONTROLLER BOARD
FUSE FUSE (6.3A/250V)
ZNR VARISTOR
CN2L CONNECTOR<LOSSNAY>
CN24 CONNECTOR<BACK-UP HEATING>
CN30 CONNECTOR<LLC>
CN32 CONNECTOR<REMOTE SWITCH>
CN41 CONNECTOR<HA TERMINAL-A>
CN51 CONNECTOR<CENTRALLY CONTROL>
SW1 SWITCH <MODEL SELECTION> See Table 1.
SW2 SWITCH <CAPACITY CODE> See Table 2.
SWE SWITCH<EMERGENCY OPERATION>
X4 RELAY<FAN MOTOR>
BCR FAN CONTROL ELEMENT
LED1 POWER SUPPLY<I.B>
P.B
CNSK CN2S
(RED) (WHT)
1 1
DC13.1V
2
3
MF
M
1~
1 2 3
C
I.B
POWER
FAN
CNDK
( WHT )
1
1 3 5
(RED)
BCR
X4
LED3 LED2 LED1
SW2 SW1
CN24
SWE
( YLW )
ON
2
OFF
Refer to tables 1 and 2
for service PCB.
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 are made with polarities, make wiring matching terminal numbers (S1, S2, S3).
3. Symbols used in wiring diagram above are,
4. This diagram shows the wiring of Indoor and Outdoor connecting wires (specification of 230V), adopting superimposed system of
power and signal.
1. Use copper supply wires.
[Self-diagnosis]
Please refer to technical manuals etc.
PKA-A12GAL
2
SYMBOL
LED2 POWER SUPPLY<R.B>
LED3 TRANSMISSION<INDOOR-OUTDOOR>
C
CAPACITOR<FAN MOTOR>
FAN MOTOR
MF
MV
VANE MOTOR
TB4
TERMINAL BLOCK<INDOOR/OUTDOOR
CONNECTING LINE>
TB5,TB6 TERMINAL BLOCK<REMOTE CONTROLLER
TRANSMISSION LINE >
TH1 ROOM TEMP.THERMISTOR
<32°F/15k
TH2 PIPE TEMP.THERMISTOR/LIQUID
<32°F/15k
TH5 COND./EVA.TEMP.THERMISTOR
<32°F/15k
R.B WIRED REMOTE CONTROLLER BOARD
Please set the voltage
using the remote controller.
For the setting method,
please refer to the indoor
unit Installation Manual.
POWER
CND
1 1
2
3 1 3
(ORN)
A-CONTROL
POWER
CN3C
CN2D
(BLU)
(WHT)
ZNR
CN41 ( WHT )
U
4 1
CN51 ( WHT )
5 1
INTAKE LIQUID PIPE REMOCON
CN20 CN21 CN29 CN22
( RED ) ( WHT ) ( BLK ) ( BLU )
1
2 1 2 1 2 1 2
t t t
TH2
TH1 TH5
: Connector,
PKA-A18GAL
2
NAME SYMBOL
W.B
, 77°F/5.2k DETECT>
Ω Ω
, 77°F/5.2k DETECT>
Ω Ω
, 77°F/5.2k DETECT>
Ω Ω
Table 2
MODELS
PKA-
A12GA(L)
YLW
TB4
1
ORN
TO
S1
OUTDOOR
YLW
S2
UNIT
ORN
S3
BRN
6
3
VANE
CN6V
(GRN)
1
CN2L ( RED )
1
2 1
CN32 ( WHT )
WIRELESS
1 3
CN90
(WHT)
CN30
( BLK )
9
3 1
1
1
TRANSMISSION WIRES DC12V
2
TB5
: Terminal (block).
16
2
NAME
WIRELESS REMOTE CONTROLLER BOARD
RU RECEIVING UNIT
BZ BUZZER
LED1 LED<RUN INDICATOR >
LED2 LED<HOT ADJUST>
SW1
SWITCH<HEATING ON/OFF>
SW2
SWITCH<COOLING ON/OFF>
Table 1
SW1
Service board
1 2 3 4 5
ON
OFF
SW2
Service board Service board
MODELS
1 2 3 4 5 1 2 3 4 5
PKA-
ON
A18GA(L)
OFF
6
M
MV
For A12/18GAL
9 9
CNB
BZ
RU
RECEIVER LED1 LED2 SW2 SW1
R.B
1
2
TB6
For A12/18GA
ON
OFF
W.B