Repair Section
67
Troubleshooting of Unit does not operate - Table 6
(3) Overflow of drain water
Condition Check Area Possible Cause Remedy
Unit stops
after
running for
a while.
LCD
displays
normally.
Temperature of fan motor
(abnormally high)
Activation of the internal
overload relay (IOLF) due to
fan motor malfunction
Replace the fan motor.
Temperature of
compressor (abnormally
high)
Activation of the overload
relay (IOLC) due to the
defective overload relay
Inspect the overload relay. If
defective, replace it.
Activation of the overload
relay (IOLC) due to the
defective compressor
Inspect the compressor. If
defective, replace it.
Refrigerant leakage Insufficient refrigerant or gas
leakage
Repair and charge
refrigerant.
Dirt on indoor or outdoor
heat exchanger
Insufficient cooling or
heating of the heat
exchanger
Clean the heat exchanger.
Duct connection state Improper connection Repair duct connection.
Condition Check Area Possible Cause Remedy
Overflow of water from the
unit
Indoor or outdoor drain pan Cracks in the drain pan Check and replace the
drain pan.
Drain hole of the indoor or
outdoor drain pan
Clogged drain hose Check and repair the
drain hose.
Clogged air filter Reversed air flow from the
drain hole due to excessive
negative pressure inside of
the unit
Clean the air filter.
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