Toshiba RAS-18UKX - Page 47

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FILE NO. SVM-01010
9-6-4. 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)
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
Compressor is defective.