Models SCM50ZJ-S1,60ZJ-S1
CAUTION- HIGH VOLTAGE
High voltage is produced in the control box. Don't touch
electrical parts in the control box for 5 minutes after the
unit is stopped.
ٟInspection power transistor
Remove the fasten terminal and test
output voltage
ٟInspection of outdoor
fan motor
See page 76.
ٟInspection of resistance value of sensor
Remove the connector and check the resistance value.
See the section of sensor characteristics on page 64.
ٟPower source and serial
signal inspection
Ԙ
to
ԙ
: AC 220/230/240V
ԙ to Ԛ : Normal if the voltage
oscillates between DC 0
and approx. 20V
UNIT A
UNIT B
UNIT C
Power supply
1 Phase
220-240V 50Hz
ٟInspection of electronic
expansion valve
See page 76.
EEV
S
BK
WH
RD
V
W
U
FMo
CM
R
CNTH
CNFAN
S-2
BK
WH
WH
S-1
CNSUB
CNMAIN
SIN
RIN
BK
WH
S
O
RO
250V 15A
㧛
FUSE
CN20S
G2
Y
㧛
G
C-2
RD
C-1
CN20V
CN20V
5
2
G1
Y
㧛
G
G
Y
㧛
G
CNEEV1
CNEEV3
CNTH
TB2
CNA
CNB
CNC
TB1
N
L
A
EEV
B
EEV
C
Y
㧛
G
WH
BK
M
3
㨪
M
M
M
M
WH
RD
BL
PWB 2
㧔
SUB
㧕
PWB 1
㧔
MAIN
㧕
20S
HEATER
WH
RD
CNHEAT
T2
T1
R
OR
YE
250V 20A
3
2
1
BK
WH
RD
3
2
1
3
2
1
BK
WH
BR
BK
WH
BL
2 2 2
t
ࠑ
t
ࠑ
t
ࠑ
t
ࠑ
2
Color Marks
Mark Color
BK
BR
Black
BL Blue
Brown
RD
Y㧛G
Red
Yellow㧛Green
WH White
OR Orange
YE Yellow
Tho-S
Tho-R Tho-A Tho-D
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