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Service Manual 51
Troubleshooting Guide
Compressor/Outdoor Fan are unable to drive.
Turn on Main Power
Operate "Cooling Mode( )" by setting the desired temperature of the
remote controller is less than one of the indoor temperature by 1°C at least.
When in Air Circulation Mode, Compressor/Outdoor Fan is stopped.
Check the sensor for indoor temperature is attached as close as to be
effected by the temperature of Heat Exchanger(EVA).
When the sensor circuit for indoor temperature and connector are in bad
connection or are not engaged, Compressor/Outdoor Fan is stopped.
• Check R02H(12.1k), R04H(6.2k), Micom Pin
26
,
27
• Check the indoor temperature sensor is disconnected or not(About 10kΩ / at 25°C).
Turn off Main Power
• Check the electrical wiring diagram of outdoor side.
• Check the abnormal condition for the component of
Compressor/Outdoor Fan Motor.
• Check the "open" or "short" of conmecting wires between indoor and
outdoor.
Check Relay(RY - COMP) for driving compressor.
• When the power(About AC220V/240V) is applied to the connecting wire
terminal support transferred to compressor, PWB Assembly is normal.
• Check the circuit related to the relay.
Check point COMP ON COMP OFF
Between Micom(No.
DC5V DC0V
63) and GND
Between IC02M(No. 14) Below DC 1V
About DC12V
and GND (app)