Toshiba RAS-24UKHP-ES-1 Service Manual page 57

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>
-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 Compressor
Is resistance value of thermo
NO
sensor (TA) and heat exchanger
sensor (TC) normal?
YES
Microcontroller 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 heat
NO
exchanger sensor
is defective.
– 55 –
FILE NO. SVM-03009
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.