Obh799 - Mitsubishi Electric MSZ-AP15VF-E1 Service Manual

OPERATION INDICATOR
Abnormal
No. Operation indicator lamp
point
Left lamp lights and lower lamp fl ashes.
MXZ type
Operation
1
mode
2.5-second OFF
setting
10-5. TROUBLE CRITERION OF MAIN PARTS
MSZ-AP15VF MSZ-AP20VF
Part name
Room temperature
thermistor (RT11)
Indoor coil thermistor
(RT12, RT13)
Indoor fan motor (MF)
Vane motor (MV)

OBH799

Symptom
Outdoor unit
operates but
indoor unit does
not operate.
Check method and criterion
Measure the resistance with a tester.
Refer to 10-7. "Test point diagram and voltage", "Indoor electronic control
P.C. board", for the chart of thermistor.
Refer to 10-6. "Check of indoor fan motor."
Measure the resistance between the terminals with a tester.
(Temperature: 10 - 30°C)
Color of the lead wire
RED - YLW
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 fi rst has
the priority.
Normal
223 - 268 Ω
23
Remedy
• Unify the operation mode.
Refer to outdoor unit service
manual.
Figure
YLW
ROTOR
YLW
RED
YLW
YLW