Trouble Criterion Of Main Parts - Mitsubishi Electric MSZ-GC22VA Service Manual

OPERATION INDICATOR
Abnormal
No.
Operation indicator lamp
point
All lamps flash at the same time.
Attachment
of the 0.5-second ON
1
horizontal
vane
0.5-second OFF
OPERATION INDICATOR
Abnormal
No. Operation indicator lamp
point
Upper lamp lights and lower lamp flashes.
MXZ type
Operation
1
mode
2.5-second OFF
setting

10-5. Trouble criterion of main parts

MSZ-GC22VA MSZ-GC25VA
Part name
Room temperature
thermistor (RT11)
Indoor coil thermistor
(RT12, RT13)
Indoor fan motor (MF)
INNER FUSE
BA : 135i3: CUT OFF
CA : 140i2: CUT OFF
Vane motor (MV)
Symptom
Indoor unit
and outdoor
unit do not
operate.
Symptom
Outdoor unit
operates but
indoor unit
does not
operate.
MSZ-GC35VA
Check method and criterion
Measure the resistance with a tester.
Refer to 10-7."Test point diagram and voltage",
"2.Indoor electronic control P.C. board", the chart of thermistor.
Measure the resistance between the terminals with a tester.
(Part temperature 10˚C ~ 30˚C)
Color of lead wire
273 " ~ 296 "
WHT – BLK
295 " ~ 320 "
BLK – RED
Measure the voltage power ON.
Color of lead wire
BRN – YLW
(When fan revolved one time)
BRN – GRY
Measure the resistance between the terminals with a tester.
(Part temperature 10°C ~ 30°C)
Color of the lead wire
RED-BLK
Condition
The electricity is not conducted to the interlock
switch (Fan) of the horizontal vane.
Condition
The operation mode of the each indoor
unit is differently set to COOL(includes DRY)
and HEAT at the same time, the operation
mode of the indoor unit that has operated at
first has the priority.
Normal
RC4V18-BA RC4V18-CA
308 " ~ 334 "
295 " ~ 320 "
Normal
4.5 ~ 5.5V
0V➔5V➔0V
(Approx.)
Normal
235 " ~ 255 "
19
Correspondence
• Refer to 10-6.E "Check of
installation of the horizontal
vane".
Correspondence
• Unify the operation mode.
Refer to outdoor unit service
manual.
Figure
MAIN
AUX.
FUSE
BLK
ROTOR
BLK
RED
BLK BLK