Check Point Of Outdoor Unit - Mitsubishi Electric DXK09ZJ-S Technical Manual

Check point of outdoor unit

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.
Color symbol
BK Black
OR Orange
RD Red
WH White
Y Yellow
Y／G Yellow／Green
Power source
1 Phase
220-240V 50Hz
Indoor
unit
Power source and serial signal inspection
to : AC 220/230/240V
L N
1 to 2 : AC 220/230/240V
2 to 3 : Normal if the voltage oscillates between DC 0 and approx. 20V
Outdoor unit
PCB ASSY （SUB）
T1
FUSE
R
BK
L IN
R
O
250V 20A BK
WH S
N IN
S WH
WH
O
BR
Y／G
R
OUT S-1
WH
G1
Y／G
BK
CNMAIN
CN20S
T2
RD
1
2
N
RD
3
Y／G
20S
Inspection of resistance value of sensor
Remove the connector and check the resistance value.
See the section of sensor characteristics on page 64.
Inspection power transistor
Remove the fasten terminal and test output voltage
L
PCB ASSY （MAIN）
F8
R
250V 20A ACTIVE
FILTER
S
UNIT
S-2
CNSUB
C-2
SWITCHING POWER
CIRCUIT
CNTH
CNEEV
M
tº tº tº
EEV
TH1 TH2 TH3
Inspection of electronic expansion valve
See page 73.
POWER
TRANSISTOR
F2
U RD
P
U
250V 20A
V WH
NU M
V
NV 3∼
W
BK
W
NW
CM
F3 250V 1A
M
CNFAN
FMo
Inspection of outdoor fan motor
See page 73.