-
73
-
'11 • SCM-SM-110
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
