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Electrical Diagram
12k wiring diagram of split unit indoor
B：BLACK
BL：BLUE
R：RED
W：WHITE
GND
R
B
W
Y/G
GND
CN13
CN10
CN16
AMBIENT
SUCTION
Y/G
BL
BL
CN20
CN15
CN14
PE
CN1
CN5
CN19
CN18
CN17
CN1
CN2
CN4
CN4
CN3
CN2
CN3
CN9
CN8
AC-L
AC-N
AC-L
AC-N
DON'T TOUCH CAPACITOR, EVEN AFTER
PLUG-OFF ( DANGER OF ELECTRIC SHOCK)
The capacitor retains high
voltage even after the plug-off.
For your safety, be sure to wait
at least 5 minutes. after plug
off and use a tester to confirm
the voltage between connector P
and N(on module board) is less
than DC 10V before start
servicing.
TO INDOOR UNIT
Y/G：YELLOW/GREEN
OR：ORANGE
Remark：the dotted parts are
optional for different unit.
to double-way air
exchange motor
air exchange motor
to single-way
DEFROST
TEMP.SENSOR
TEMP.SENSOR
TEMP.SENSOR
COMPRESSOR DISCHARGE
TEMP.SENSOR
DC FAN MOTOR
CN21
FUSE2
Electric
Heating Cable
Description
1
2
3
4
8
6
5
13
19
18
12
10
Times
24
25
Outdoor EEPROM error
The protection of IPM
Communication fault
Overcurrent protection
Overheat protection for
Over pressure or Overheat
Deviate from the normal
Exhaust temperature sensor failure
Ambient temperature sensor failure
of AC electricity
between the IPM and CBD
protection for the compressor
Power voltage is too high or low
exhaust temperature
Frost-removing temperature
sensor failure
for the compressor
Loop of the station detect error
Overcurrent of the compressor
Overcurrent protection for
single-phase of the compressor
LED1 Flash
W
V
U
B
W
R
CN22
CN6
CN7
CN26
CN24
CN10
BL
OR
CN23
CN11
CN9
CN8
B
W
WARNING
CAUTION
PFC REACTOR
MODULE BOARD
MAIN CONTROL BOARD
AC FAN MOTOR
4-WAY VALVE
EXPANSION VALVE
ELECTRIC
1A/250VAC
CN11
11