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 of electronic
expansion valve
See page 84.
◆Inspection of resistance valve of sensor
Remove the connector and check the resistance valve.
See the section of sensor characteristics on page 74.
◆Power source and serial signal inspection
L to N : AC 220/230/240V
1 to 2/N : AC 220/230/240V
2/N to 3 : Normal if the voltage oscillates between
DC 0 and approx. 20V
◆Inspection power transistor
Remove the fasten terminal and test
output voltage
◆Inspection of outdoor fan motor
See page 84.
◆Check point of outdoor unit
Color
Color symbol
OR
Mark
BrownBR
Yellow／GreenY／G
BlackBK
BlueBL
WhiteWH
RedRD
Orange
Display Voltage range
◆Voltage check in PCB
The normal range is as follows.
①DC280V DC230V - DC310V
②DC220V DC218V - DC222V
③DC213V DC212V - DC214V
④DC215V DC214V - DC216V
⑤DC225V DC224V - DC226V
⑥DC 2.5V DC 2.3V - DC
2
2.5V
M
T2
（BK）
（WH）
（RD）
V WU
M
CNTH
CNEEV
CNFAN
1 2 3 4 6
t゜
R
（OR）
T1
（Y）
2 2 2
TH1 TH2 TH3
EEV
FMo
t゜
t゜
MS
CM
3～
（WH）
（OR）
（BR）
（RD）
（BL）
N L
250V 15A
2
1
N
3
（Y／G）
20S
Outdoor unit
S.IN
R.IN
C-2
②
④
⑤
⑥
③
（RD）
（WH）
（BK）
（BK）
CN20S
①
TB1
TERMINAL
BLOCK
Power source
1 Phase
AC200-240V 50Hz
Indoor
unit
