Mitsubishi Electric MSZ-EF18VGW-E1 Service Manual page 36

OPERATION INDICATOR
Abnormal
No. Operation indicator lamp
point
Left lamp lights and lower lamp blinks.
MXZ type
Operation
1
mode
2.5-second OFF
setting
10-5. TROUBLE CRITERION OF MAIN PARTS
MSZ-EF18VGW MSZ-EF22VGW MSZ-EF25VGW MSZ-EF35VGW MSZ-EF42VGW MSZ-EF50VGW
MSZ-EF18VGB MSZ-EF22VGB
MSZ-EF18VGS MSZ-EF22VGS
MSZ-EF18VGKW MSZ-EF22VGKW MSZ-EF25VGKW MSZ-EF35VGKW MSZ-EF42VGKW MSZ-EF50VGKW
MSZ-EF18VGKB MSZ-EF22VGKB MSZ-EF25VGKB MSZ-EF35VGKB MSZ-EF42VGKB MSZ-EF50VGKB
MSZ-EF18VGKS MSZ-EF22VGKS MSZ-EF25VGKS MSZ-EF35VGKS MSZ-EF42VGKS MSZ-EF50VGKS
Part name
Room temperature
thermistor (RT11)
Indoor coil thermistor
(RT12, RT13)
Indoor fan motor (MF)
Vane motor (MV)
OBH831D
Lit
Blinking
Not lit
Symptom
Outdoor unit
operates but
indoor unit does
not operate.
MSZ-EF25VGB
MSZ-EF25VGS
Check method and criterion
Measure the resistance with a multimeter.
Refer to 10-7. "Test point diagram and voltage", "Indoor electronic control
P.C. board", for the chart of thermistor.
Check 10-6. "Check of indoor fan motor".
Measure the resistance between the terminals with a multimeter.
(Temperature: 10 - 30°C)
Color of the lead wire
RED - BLK
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.
MSZ-EF35VGB MSZ-EF42VGB
MSZ-EF35VGS MSZ-EF42VGS
Normal
232 - 268 Ω
36
Remedy
• Unify the operation mode.
Refer to outdoor unit service
manual.
MSZ-EF50VGB
MSZ-EF50VGS
Figure
BLK
ROTOR
BLK
RED
BLK
BLK