20
10-5. TROUBLE CRITERION OF MAIN PARTS
Part name
Check method and criterion
Figure
Room temperature
thermistor (RT11)
Indoor coil thermistor
(RT12, RT13)
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.
Indoor fan motor (MF)
Check 10-6. "Check of indoor fan motor".
Vane motor (MV)
Measure the resistance between the terminals with a tester.
(Temperature: 10 - 30°C)
Color of the lead wire
Normal
RED-SKY
262 ~ 328 Ω
SKY
SKY
RED
SKY SKY
ROTOR
OPERATION INDICATOR
No. Abnormal
point
Operation indicator lamp
Symptom
Condition
Remedy
1
MXZ type
Operation
mode
setting
Left lamp lights and right 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, FAN)
and HEAT at the same time, the operation
mode of the indoor unit that has operated at
first has the priority.
• Unify the operation mode.
Refer to outdoor unit service
manual.
Lit
Blinking
Not lit
OBH849A
