Toshiba RAS-18NKHD-E5 Service Manual page 58

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 NO
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 thermo
NO
sensor (TA) and heat ex-
changer sensor (TC) normal?
YES
Microcomputer is defective.
NO
Miniature relay RY04 is
defective.
NO
NO
Compressor is defective.
NO
Capacitor is defective.
NO
NO
Compressor is defective.
NO
Gas shortage (Gas leak)
Thermo sensor or
NO
heat exchanger
sensor is defective.
Overload relay is
defective.
– 57 –
FILE NO. SVM-06005
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.