24
OPERATION INDICATOR
No.
Abnormal
point
Operation indicator lamp
Symptom
Condition
Remedy
1
MXZ type
Operation
mode
setting
Left lamp lights and lower lamp blinks.
2.5-second OFF
Outdoor unit
operates but
indoor unit does
not operate.
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
fi
rst has
the priority.
• Unify the operation mode.
Refer to outdoor unit service
manual.
9-5. TROUBLE CRITERION OF MAIN PARTS
MSZ-EF09NAW MSZ-EF12NAW MSZ-EF15NAW MSZ-EF18NAW
MSZ-EF09NAB MSZ-EF12NAB MSZ-EF15NAB MSZ-EF18NAB
MSZ-EF09NAS MSZ-EF12NAS MSZ-EF15NAS MSZ-EF18NAS
Part name
Check method and criterion
Figure
Room temperature
thermistor (RT11)
Indoor coil thermistor
(RT12, RT13)
Measure the resistance with a tester.
Refer to 9-7. "Test point diagram and voltage", "Indoor electronic control P.C.
board", for the chart of thermistor.
Indoor fan motor (MF)
Check 9-6. "Check of indoor fan motor".
Vane motor (MV)
Measure the resistance between the terminals with a tester.
(Temperature: 50 - 86°F (10 - 30°C))
Color of the lead wire
Normal
RED - BLK
232 - 268
Ω
BLK
BLK
RED
BLK
BLK
ROTOR
OBH736A
