Check SiBE041010
94 Service Diagnosis
5.1.6 Outdoor Fan System Check
Check No.09 DC motor
5.1.7 Power Supply Waveforms Check
Check No.10 Measure the power supply waveform between No. 1 and No. 2 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)
(R7159)
YES
YES
NO
NO
Outdoor fan system is functioning.
Check the outdoor fan system.
Go to Check No. 15.
Outdoor fan running?
Fan motor
lead wire connector
disconnected?
Reconnect the connector.
Fig.1 Fig.2
(R1736)
(R1444)
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