9-3-3. Only compressor does not run.
9-3-4. Only flap motor does not run.
9-3-5. Function of outdoor fan speed control does not work properly. (For C121 models)
Refer to "8-4 Outdoor Fan Speed Control ".
• Check thermostat in outdoor unit.
(23S)
• Measure resistance of flap motor
winding.
• Check compressor motor
capacitor.
• Measure resistance of
compressor motor winding.
NO
YES
YES
Overload relay is working.
YES
Temperature of compressor
is abnormally high.
Refrigerant gas shortage.
Charge refrigerant gas (R22).
Rotor may be locked up.
• Measure Power supply
voltage.
The voltage is too low.
No
49
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