21
10-5. TROUBLE CRITERION OF MAIN PARTS
MSZ-DM25VA MSZ-DM35VA
Part name
Check method and criterion
Figure
Room temperature
thermistor (RT11)
Measure the resistance with a tester.
Refer to 10-7. "Test point diagram and voltage", "2. Indoor electronic control
P.C. board", for the chart of thermistor.
Indoor coil thermistor
(RT12, RT13)
Indoor fan motor (MF)
Check 10-6. .
Vane motor (MV)
Measure the resistance between the terminals with a tester.
(Part temperature 10 ~ 30°C)
Color of the lead wire
Normal
RED - BLK
235 ~ 255
Ω
BLK
BLK
RED
BLK
BLK
ROTOR
OPERATION INDICATOR
No.
Abnormal
point
Operation indicator lamp
Symptom
Condition
Remedy
1
MXZ type
Operation
mode
setting
Upper lamp lights and lower lamp
fl
ashes.
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.
OBH750
