SiBE05-513A Check
Service Diagnosis 117
5.1.6 Outdoor Unit Fan System Check
Check No.09 DC motor
5.1.7 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)
5.1.8 Inverter Units Refrigerant System Check
Check No.11
Check the outdoor unit fan system.
Reconnect.
(R2857)
Outdoor unit fan running?
YES
Fan motor lead wire
connector disconnected?
YESNO
NO
Outdoor unit fan system
functioning.
Go to Check No. 15.
[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
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