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7-3-3. Only compressor unit does not run.
A. Check setting temperature.
B. Check compressor and electrical parts.
●
If the unit is turned off during cooling, DO NOT restart it immediately, as this
can damage it. Wait at least 3 minutes or so before starting it again.
●
The compressor does not start up immediately even when the MODE selector
switch is set to COOL or HEAT (It starts operating in about 3 minutes).
●
This is because rough 3-minute timer is built into the heat pump model in order
to protect the compressor. When operation is started up or restarted, the fan
operation begins immediately but the compressor starts operating after about
3-minute lag.
Heat pump model
Cooling & electric heating modelsCooling only models
CAUTION
•
Check compressor motor
capacitor.
•
Measure resistance of
compressor motor winding.
NO
YES
YES
Overload relay is working.
(OLR)
YES
Temperature of compressor
is abnormally high.
Refrigerant gas shortage. Charge refrigerant gas (R22).
Rotor may be locked up.
(Only for 115V models)
Check PTC thermistor.
•
NO
Is room temperature too low ?
Try to lower setting temperature by
thermostat knob cooler.
COOL mode
NO
Is room temperature too high ?
Try to raise setting temperature by
thermostat knob warmer.
HEAT mode
(Only for heat pump model)
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