27
Lit
Blinking
Not lit
10-5. TROUBLE CRITERION OF MAIN PARTS
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. “Check of indoor fan motor”.
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
219 ~ 273
Ω
BLK
BLK
RED
BLK
BLK
ROTOR
OPERATION INDICATOR
No.
Abnormal
point
Operation indicator lamp
Symptom
Condition
Remedy
1
Attachment
of the hori-
zontal vane
All lamps blink at the same time.
0.5-second ON
0.5-second OFF
Indoor unit and
outdoor unit do
not operate.
The electricity is not conducted to the inter-
lock switch (Fan) of the horizontal vane.
• Refer to 10-6. "Check of
installation of the horizontal
vane".
OBH779C
