Troubleshooting Si10-417
162 Service Diagnosis
5.4.9 Power Supply Waveforms Check
Check
No.10
Measure the power supply waveform between pins 1
and 3 on the terminal board, and check the waveform
disturbance.
Check to see if the power supply waveform is a sine
wave (Fig.1).
Check to see if there is waveform disturbance near
the zero cross (sections circled in Fig.2)
5.4.10 Inverter Units Refrigerant System Check
Check
No.11
[Fig.1] [Fig.2]
Refrigerant system check
Check for gas leaks.
See the section on insufficient
gas detection.
Conduct the
check after
operating the
equipment for
a sufficient
length of time.
Correct the problem.
Conduct vacuum
drying.
Replace the
refrigerant.
Is
the discharge
thermister disconnected
from the holder?
(R1445)
YES
YES
YES
Is any moisture
found in sight glass.
NO
NO
Si10-417.fm Page 162 Wednesday, September 22, 2004 6:38 PM
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