Haier MRV S II - Wiring Diagram

1414
SYMBOL
Notes
Please power off rstly for about 10 minutes
before checking control box, and make sure the
voltage between P and N below 20V.
• Please check the power rstly before test, and
make sure the crankcase heater powering on for
12 hours at least to protecting compressor.The
switch BM1-1 is used for locking the indoor units
number, the initial situation is "OFF". After power on,
the display board will display
【
U**
】
,"**"indicates
the number of indoor units that the outdoor unit
can communicate with. If it can match the actual
number of indoor units, please change "OFF" to
"ON", or else x the communication problem rstly.
Forbid connecting the power wire to the "P" and "Q",
otherwise the control board will be damaged.Please
make sure the earth wire connecting the grounding
hole on the electric box rmly.
Symbol Signication
HEATER,
2
Crankcase
heater
SV1
Unloading
valve
SV2 Spray valve
4WV 4-way valve
CA Capacitor
ACFAN2 AC fan motor
DCFAN1 DC fan motor
HPS
High pressure
switch
Td
Discharging
temp
.
sensor
Te1, 2
Defrost
temperature
sensor
Symbol
Signication
Ts
Suction
temperature
sensor
Ta
Ambient
temperature
sensor
Pd
High pressure
sensor
Ps
Low pressure
sensor
Toil
Oil temperature
sensor
EEV
Electronic
expansion valve
Tn
IPM temperature
sensor
CB1, 2
Electrolytic
capacitor
R Red
W White
BL Blue
B Black
Y Yellow
5. Wiring Diagram
L1 L2 L3 N E
L1 L2 L3 N E
～
～
～
T1
T2
T3
L1
L2
L3
L1 L2 L3 N
PQ
M
M
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
M
HPS Td Te1 Te2 Ts Ta Ps Pd Toil
6.3A 250VAC
FUSE1
CN1 CN2 CN3 CN4 CN5 CN6 CN7 CN29 CN28 CN30
CN26
CN18
CN17
CN16
CN25
ACFAN2
HEATER2
SV2
SV1
4WV
HEATER
CA
CONTROL BOARD
SW1
LED1
DCFAN1
LED3
LED4 LED2
SW2
SW3
SW4
BM1 BM2
ON ON
CN21
CN9
CN20
CN8
CN24
CN10
CN11
0150513195
LD1 LD2 LD3
CN32
CN31
CN30
LED
DISPLAY
SW01 SW02
INV Board
Tn
CN7 CN8
CN2
CN3
CN1
U V W
P
N
EEV
R W B
B
BB
B
B
W
W
W
W
W
PTC
CB1 CB2
Y
Y
R1 R2
REACTOR
R
COMP
AC Contactor
Earth Wire
Noise Filter
R W BL B
WARNING