(11) Outdoor unit inspection points
Models SCM40ZJ-S,45ZJ-S
CAUTION
-
HIGH VOLTAGE
High voltage is produced in the control box. Don't touch
electrical p
a
rts in the control box for 5 minutes af
te
r 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
Color Marks
Mark
Color
BK
BR
Black
Brown
RD
Y／G
Red
Yellow／Green
WH White
OR Orange
EEV
S
BK
WH
RD
V
W
U
FM0
CM
R
CNTH
CNFAN
S-2
BK
WH
WH
S-1
CNSUB
CNMAIN
S
IN
R
IN
BK
WH
S
O
RO
250V 15A
FUSE
CN20S
G2
Y
／G
C-2
RD
C-1
CN20V
CN20V
5
2
G1
Y
／
G
G
Y
／
G
CNEEV1
CNTH
TB2
CNA
CNB
TB1
N
L
A
EEV
B
Y
／
G
WH
BK
UNIT A
UNIT B
M
3～
M
M
M
Power supply
1 Phase
220-240V 50Hz
WH
RD
PWB 2（SUB
）
PWB 1
（
MAIN
）
20S
HEATER
WH
RD
CNHEAT
T2
T1
R
OR
YE
3
2
1
BK
WH
RD
3
2
1
BK
WH
BR
TB3
2
2
2
t゜
t゜
t゜
t゜
2
Tho-S
Tho-R
Tho-A
Tho-D
YE Yellow
◆Inspection of electronic
expansion valve
See page 76.
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