Compressor Does Not Operate - Chigo 38B Service Manual

Turn on power supply.
Does OPERATION
indication indicate?
YES
Does compressor delay
three minutes by
temperature changes or
others?
YES
Wait three minutes
Is it possible to detect AC
220-240V on terminal
block or contactor of
compressor?
YES
Are all of compressor
cords normal?
YES
Is compressor motor
winding normal?(Check
winding resistor.)
YES
Is capacitor for
compressor normal?
YES
Is overload relay normal?
YES
Does compressor start?
YES
Does compressor stop
after a while?
YES
Is gas quantity normal?
(Check gas pressure.)
YES
Compressor is defective.

Compressor does not operate.

<Primary check>
(1) Is the room temperature higher than the preset temperature in cooling operation?
(2) Is the crossover cable connected properly?
NO
Is resistance value of room
NO
sensor (Tr) and heat exchanger
sensor (TP1) normal?
NO
Microcontroller is defective or
miniature relay is defective..
NO
NO
Compressor is defective.
NO
NO
Overload relay is defective.
NO
Compressor is defective.
NO
Gas shortage (Gas leak)
YES
NO
YES
Capacitor is defective.
34
Check power supply.
Room sensor or heat
exchanger sensor is
defective.
Replace room sensor
or heat exchanger
sensor.
Replace P.C. board.
Rewire or replace
defective cords.
Replace compressor.
Replace capacitor.
Replace overload
relay.
Replace compressor.
Supply gas.
Replace compressor.