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7-3-3. Only compressor does not run.
A. Check setting temperature.
COOL
Is room temperature too low ?
Try to lower setting temperature by
thermostat knob COOLER.
B. Check compressor and electrical parts.
• Check compressor motor
capacitor.
• Measure resistance of
compressor motor winding.
• Measure power supply
voltage.
The voltage is too low.
CAUTION
If the unit is turned off during cooling (or heating), DO NOT restart it immediately, as this can damage it. Wait at
least three minutes before starting it again.
NO
Internal protector is working.
Temperature of compressor
is abnormally high.
Refrigerant gas shortage.
No
Rotor may be locked up.
HEAT
Is room temperature too high ?
Try to raise setting temperature by
thermostat knob WARMER.
YES
YES
YES
NO
15
NO
Charge refrigerant gas (R22).
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