Mitsubishi Heavy Industries SCM50ZS-W User Manual

-
95
-
'19 • SCM-SM-281
◆Inspection power transistor
Remove the fasten terminal and test
output voltage
◆Inspection of outdoor fan motor
See page 96.
◆Inspection of resistance value of sensor
Remove the connector and check the resistance value.
See the section of sensor characteristics on page 87.
FMo
RD
CNTH
CNFAN
M
2 2 2
t゜ t゜
2
t゜ t゜
TH1 TH2 TH3 TH4
T2
T1
L
YE
YE
T12
T11
L
BL
BL
20S
CN20S
BK WH RD
V W
U
CM
M
3～
CNSUB
S-2
C-2
CNTH
CNFAN
②
①
⑤
Models SCM50ZS-W,60ZS-W
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.
◆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
Power source
1 Phase
AC220-240V 50Hz
220V 60Hz
◆Inspection of electronic
expansion valve
See page 96.
Color marks
Mark Color
BK Black
BL Blue
BR Brown
RD
Y／G
Red
Yellow ／Green
WH White
YE Yellow
EEV A
BK
WH
WH
S-1
CNMAIN
S
IN
R
IN
BK
WH
S
O
RO
250V 20A
FUSE
G2
Y／G
RD
C-1
CN20V
3
2
G1
Y／G
CNEEV1
CNEEV3
TB1
N
L
EEV B EEV C
Y／G
WH
BK
M
M
M
WH
RD BL
PCB 2（SUB）
PCB 1（MAIN）
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
RS
③
⑥
④
CNTH
2
t゜
TH5
To indoor unit
TB2
CNA
CNB
CNC
UNIT A
3
2
1
BK
WH
RD
3
2
1
3
2
1
BK
WH
BR
BK
WH
BL
UNIT B
UNIT C
44 4
(12) Outdoor unit inspection points

Mitsubishi Heavy Industries SCM50ZS-W Specifications

General

Brand	Mitsubishi Heavy Industries
Model	SCM50ZS-W
Category	Air Conditioner
Language	English