Mitsubishi MSZ-GA50VA Service Manual page 17

Lighted
Blinking
Not Lighted
Abnormal
No. Operation indicator lamp
point
Right lamp flash
MXZ type
Operation
1
mode
2.5-second OFF
setting
9-5. Trouble criterion of main parts
MSZ-GA50VA MSZ-GA60VA MSZ-GA71VA
Part name
Room temperature
thermistor(RT11)
Indoor coil thermistor
(RT12(MAIN), RT13(SUB))
Indoor fan motor(MF)
Horizontal vane
motor(MV1)
Vertical vane
motor(MV2)
· Flashing of OPERATION INDICATOR lamp (right-hand side lamp) indicates
abnormality.
· OPERATION INDICATOR lamp (left-hand side lamp) is lighted.
Symptom
Outdoor unit
operates but
indoor unit
does not
operate.
Check method and criterion
Measure the resistance with a tester.
Refer to 9-7. "Test point diagram and voltage", "Indoor electronic control
P.C. board", the chart of thermistor.
Check 9-6. A.
Measure the resistance between the terminals with a tester.
(Part temperature 10°C ~ 30°C)
Color of the lead wire
BRN-other one
Condition
When the operation mode of each indoor unit
is differently set to COOL(includes DRY) and
HEAT at the same time, the operation mode of
indoor unit that has operated at first has the
priority.
Normal
282 " ~ 306 "
17
Correspondence
• Unify the operation mode.
Refer to outdoor unit
service manual.
Figure
RED
ROTOR
YLW
BRN
ORN GRN