Mitsubishi Heavy Industries SRK20ZJX-S Service Manual page 118

FUSE
250V 15A
250V 20A
TB1
BK
BK
R
L
IN
POWER
WH WH
S
SUPPLY N IN
Y G
G1
Y G
G
Y G
TB2
BK
1
WH
CNA
UNIT A 2
RD
3
BK
1
WH
UNIT B 2 CNB
BR
3
BK
1
WH
UNIT C 2
CNC
BL
3
CNHEAT CN20S
WH RD
HEATER 20S
Color Marks
Mark Color Mark Color
BK Black BR Brown
BL Blue YE Yellow
RD Red Y G Yellow Green
WH White
OR Orange
WIRING DIAGRAM
S-1
C-1
CNMAIN
CN20V
PWB 2 SUB
G2 CNEEV1 CNEEV3 CNTH
Y G
2
WH RD BL
M M M
TH4
EEV EEV EEV
A B C
Meaning of Marks
Item Description
CNA-CN20S Connector
20S 4 Way valve coil
CM Compressor motor
EEV A,EEV B Electric expansion valve
EEV C coil
FMo Fan motor
HEATER Crank case heater
BK
R
R
O
WH
S
S
O
YE
T1
WH
S-2 R
OR
T2
RD
C-2
5
CNSUB
2
CN20V U RD
V WH
M
3
W BK
CM
PWB 1 MAIN
M
CNFAN
FMo
CNTH
2 2 2
TH1 TH2 TH3
Item Description
R Reactor
TB1,TB2 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 flash Current cut
2 Time flash Trouble of outdoor unit
3 Time flash Over current
4 Time flash Transmission error
5 Time flash Over heat of compressor
6 Time flash Error of signal transmission
7 Time flash Lock of compressor
8 Time flash Sensor error
Except discharge pipe sensor
Light on Outdoor fan motor error
Four sec light
and Discharge pipe sensor error
four sec off
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.