Toshiba RAS-18UFHP-E Service Manual page 61

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>
-Cooling only model-
Turn on power supply.
NO
Does OPERATION
lamp blink?
YES
Does miniature relay RY04
switch on and off due to
temperature changes?
YES
Is it possible to detect AC
220 – 240V between 2
and 3 on terminal block?
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.
YES
Replace P.C. board.
Is resistance value of
NO
thermo sensor (TA) and heat
exchanger sensor (TC) normal?
YES
Microcomputer is defective.
NO
Miniature relay RY04
is defective.
NO
NO
Compressor is defective.
NO
Capacitor is defective.
NO
Overload relay is defective.
NO
Compressor is defective.
NO
Gas shortage (Gas leak)
Thermo sensor or
NO
heat exchanger
sensor is defective.
– 60 –
FILE NO. SVM-02008
Refer to 9-6-1
"Power can not be
turned on".
Replace thermo 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.