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FILE NO. SVM-05016
9-6-3. Compressor does not operate.
<Primary check>
(1) Is the preset temperature higher than the room temperature in cooling operation?
(2) Is the crossover cable connected properly?
<Inspection procedure>
Turn on power supply.
Does OPERATION
lamp blink?
Does miniature relay RY04
switch on and off due to
temperature changes?
Is resistance value of thermo
sensor (TA) and heat ex-
changer sensor (TC) normal?
Thermo sensor or
heat exchanger
sensor is defective.
Replace thermo sensor
or heat exchanger
sensor.
Refer to 9-6-1 “Power
can not be turned on”.
Is it possible to detect AC
220 – 240V between
2
and
3
on terminal block?
Are all of compressor cords normal?
Is compressor motor winding
normal?
(Check winding resistor.)
Is capacitor for compressor normal?
Is overload relay normal?
Does compressor start?
Does compressor stop after a while?
Is gas quantity normal?
(Check gas pressure.)
Compressor is defective.
NO
YES
YES
YES
Replace P.C. board.
Gas shortage (Gas leak)
Compressor is defective.
Microcomputer is defective.
Miniature relay RY04 is
defective.
Overload relay is
defective.
Capacitor is defective.
Compressor is defective.
Replace P.C. board.
Rewire or replace
defective cords.
Replace compressor.
Replace capacitor.
Replace overload relay.
Replace compressor.
Supply gas.
YES
YES
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
NO
NO
NO
YES
NO
