Indoor Unit: Checking The Power Supply Wave Form - Daikin Sky Air R-407C Service Manual

ESIE02–01
5.3

Indoor Unit: Checking the Power Supply Wave Form

Checking To check the power supply wave form, proceed as follows:
Step
1
2
3
4
Part 3 – Troubleshooting
Action
Measure the power supply wave form between pin 1 and 3 of X1M for the outdoor units or
between pin 1 and 3 of X2M for the indoor units.
Check whether the power supply wave form is a sine wave:
Check whether there is wave form disturbance near the zero cross:
Adjust the supply voltage.
Additional Checks for Troubleshooting
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