Daikin FTXS09HVJU - Power Supply Waveforms Check

SiUS04-904 Check
148 Service Diagnosis
5.1.7 Outdoor Unit Fan System Check
Check No.09
5.1.8 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)
(R7159)
YES
YES
NO
NO
Outdoor unit fan system
functioning.
Check the outdoor unit fan system.
Go to Check No. 15.
Outdoor unit fan running?
Fan motor
lead wire connector
disconnected?
Reconnect.
[Fig.1] [Fig.2]