Outdoor Units - Mitsubishi Heavy Industries SRK20ZJX-S Service Manual

FUSE
250V 15A
TB1
BK BK
R
L IN
POWER
WH
WH
S
N IN
SUPPLY
Y／G
G1
Y／G
G
Y／G
TB2
1 BK
WH
UNIT A 2 CNA
RD
3
TB3
BK
1
WH
CNB
UNIT B 2
BR
3
CNHEAT CN20S
WH RD
HEATER 20S
Color Marks
Mark Color Mark Color
BK Black YE Yellow
RD Red Y／G Yellow／Green
WH White
OR Orange
BR Brown
WIRING DIAGRAM
S-1
C-1
CNMAIN
CN20V
PWB 2（SUB）
G2 CNEEV1 CNTH
Y／G
2
WH RD
M M
EEV EEV TH4
A B
Meaning of Marks
Item Description
CNA-CN20S Connector
20S 4 Way valve（coil）
CM Compressor motor
EEV A,EEV B Electric expansion valve
（coil）
FMo Fan motor
HEATER Crank case heater
BK
R R
O
WH
S S
O YE
T1
WH
R
S-2
OR
T2
RD
C-2
5
CNSUB
2
U RD
CN20V
V WH M
3～
W BK
CM
PWB 1（MAIN）
M
CNFAN
FM0
CNTH
2 2 2
TH1 TH2 TH3
Item Description
R Reactor
TB1-TB3 Terminal block
Th1 Heat exchanger sensor
（outdoor unit）
Th2 Outdoor air temp. sensor
Th3 Discharge pipe temp. sensor
Th4 Suction pipe temp. sensor
Indication lamp Color Function
Led e （1） Red Warning lamp
Self diagnosis function by led e
1 Time ash Current cut
2 Time ash Trouble of outdoor unit
3 Time ash Over current
4 Time ash Transmission error
5 Time ash Over heat of compressor
6 Time ash Error of signal transmission
7 Time ash Lock of compressor
8 Time ash Sensor error
（Except discharge pipe sensor）
Light on Outdoor fan motor error
Four sec light
and Discharge pipe sensor error
four sec o
Caution ・When the compressor does not run Immediately after
hitting on the button,wait for 5 to 10 minutes.（There is
possibility of delayed start.）
・High voltage is produced in the control box. don't touch
electrical parts in the control box for 5 minutes after
cutting power supply.