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Installation & service manual _7
WIRING SYSTEM DIAGRAMS
3 2 1
Terminal block of indoor unit
3 2 1L1 L2
Terminal block
of outdoor unit
Power supply,
1 phase, 60 Hz
INDOOR UNIT OUTDOOR UNIT
Ground wire
ACN wire
ACL wire
Communication
wire
L1
L2
1
2
3
1
2
3
OUTDOOR UNIT
BU
BN
OR
ACN
ACL
CMU
INDOOR CONTROL BOARD
DISPLAY AND
RECEIVE BOARD
COMPULSIVE SWITCHING
TEMP SENSOR
PIPE SENSOR
IN FAN
STEP
MOTOR
FUSE
3.15 A
INDOOR UNIT WIRING DIAGRAM
2
2
2
5
5
9
L1
L2
1
2
3
1
2
3
OUT
FAN
COMPRESSOR
HIGH
PRESSURE
SWITCH
LOW
PRESSURE
SWITCH
FUSE
3.15 A
BN
WH
BU
BU
BN
OR
CMU
ACN
COM
NO
OUTDOOR CONTROL BOARD
OUTDOOR TEMP SENSOR
CAPACITOR
RD
C
R
S
5
2
PROTECTOR
OUTDOOR UNIT WIRING DIAGRAM
INDOOR UNIT
18SRA-HE | 24SRA-HE (208-230V - 60Hz)
INDOOR UNIT
OUTDOOR UNIT