Toshiba RAS-24UK-AR - 9-7. Troubleshooting for Wiring (Interconnect Cable and Serial Signal Wire)

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FILE NO. SVM-01010
<Inspection procedure>
Turn on power supply.
Refer to item “Power
can not be turned on”.
Does OPERATION
lamp blink?
Is it possible to start
unit by remote control?
Is it possible to detect DC
15 – 60V between 2 and
3 on terminal block?
Is crossover cable normal?
Is it possible to detect AC
12V on secondary side
(CN06) of transfer?
Refer to 9-9 “Troubleshooting
for Remote Control”.
Check TA and TC sensors or
refer to “01 – 04” in Table 9-4-1.
Connect crossover
cable properly.
Replace transfer.
YES
NO
YES
NO
NO
NO
YES
YES
YES
NO
NO
Are all of compressor cords normal?
Rewire or replace
defective cords.
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.
Replace P.C. board.
Replace compressor.
Compressor is
defective.
Replace capacitor.
Replace overload relay.
Replace compressor.
Supply gas.
Capacitor is
defective.
Overload relay is
defective.
Compressor is
defective.
Gas shortage
(Gas leak)
YES
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO