Models SCM71ZJ-S1,80ZJ-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
①
to ②
: AC 220/230/240V
②
to
③
: Normal if the voltage
oscillates between DC 0
and approx. 20V
UNIT A
UNIT B
UNIT C
UNIT D
Power supply
1 Phase
220-240V 50Hz
◆Inspection of electronic
expansion valve
See page 76.
Color Marks
Mark
Color
BK
BR
Black
BL
Blue
BR Brown
Brown
RD
Y／G
Red
Yellow
／Green
WH
White
OR Orange
YE
Yellow
EEV
S
BK
WH
RD
V
W
U
FMo
CM
R
CNTH
CNFAN
S-2
BK
WH
WH
S-1
CNSUB
CNMAIN
S
IN
R
IN
BK
WH
S
O
R
O
250V 20A
FUSE
CN20S
2
2
2
G2
Y／
G
C-2
RD
C-1
CN20V
CN20V
5
2
G1
Y
／
G
G
Y／
G
CNEEV1
CNEEV2
CNTH
t゜
2
TB2
CNA
CNB
CNC
CND
TB1
N
L
A
EEV
B
EEV
C
EEV
D
TB3
TB4
TB5
3
2
1
3
2
1
3
2
1
3
2
1
Y
／
G
WH
BK
BK
WH
RD
Y／G
BK
WH
BL
Y
／
G
BK
WH
YE
Y
／G
BK
WH
BR
Y／G
M
3～
M
M
M
M
M
Y
／
G
WH
RD BL
GN
PWB 2（SUB
）
PWB 1
（MAIN
）
t゜
20S
HEATER
WH
RD
t゜
t゜
CNHEAT
T2
T1
R
OR
YE
Tho-S
Tho-R
Tho-A
Tho-D
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