Daikin SKYAIR Service Manual page 37

Appendix A
4. Power supply waveforms check procedures
Measure the power supply waveform between Live and Neutral on the terminal board, and check the
waveform disturbance. (using oscilloscope)
• Check if the power supply waveform is a sine wave (Fig. 1).
• Check if there is waveform disturbance near the zero cross (sections circled in Fig. 2).
Fig. 1
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Fig. 2
(R1726) (R1444)