TROUBLESHOOTING GUIDE
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A. The air conditioner does not
run.
1. Power failure.
2. Fuse blown or circuit breaker
open.
3. Voltage is too low.
4. Faulty contactor or relay.
5. Electrical connections loose.
6. Thermostat adjustment too low
(in heating mode) or too high (in
cooling mode).
7. Faulty capacitor.
8. Incorrect wiring, terminal loose.
9. Pressure switch tripped.
1. Wait for power resume.
2. Replace the fuse or reset the
breaker.
3. Find the cause and ?x it.
4. Replace the faulty component.
5. Retighten the connection.
6. Check thermostat setting.
7. Find the cause then replace
capacitor.
8. Check and retighten.
9. Find the cause before reset.
B. The outdoor fan runs but the
compressor will not start.
1. Motor winding cut or grounded.
2. Faulty capacitor.
1. Check the wiring and the
compressor winding resistance.
2. Find the cause then replace
capacitor.
C. There is insuf ?cient heating or
cooling.
1. There is a gas leak.
2. Liquid and gas line insulated
together.
3. The room was probably very hot
(cool) when you started the
system.
1. Remove charge, repair,
evacuate and recharge.
2. Insulate them separately.
3. Wait while unit has enough time
to cool the room.
D. The compressor runs
continuously.
1. Thermostat adjustment too low
(in heating mode) or too high
(in cooling mode).
2. Faulty fan.
3. Refrigerant charge too low, leak.
4. Air or incondensables in refriger-
ant circuit.
1. Check thermostat setting.
2. Check condenser air circulation.
3. Find leak, repair and recharge.
4. Remove charge, evacuate and
recharge.
E. The compressor starts but shuts
down quickly.
1. Too much or too little refrigerant.
2. Faulty compressor.
3. Air or incondensables in
refrigerant circuit.
4. Changeover valve damaged or
blocked open (heat pump unit).
1. Remove charge, evacuate and
recharge.
2. Determine the cause and
replace compressor.
3. Remove charge, evacuate and
recharge.
4. Replace it.
F. Clicking sound is heard from the
air conditioner.
In heating or cooling operation any
plastic parts may expand or shrink
due to a sudden temperature change
in this event, a clicking sound may
occur.
In heating or cooling operation any
plastic parts may expand or shrink
due to a sudden temperature change
in this event, a clicking sound may
occur.
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