ESIE05-04 Additional Checks for Troubleshooting
Part 3 ā Troubleshooting 3ā55
4.3 Indoor Unit: Checking the Power Supply Wave Form
Checking To check the power supply wave form, proceed as follows:
Step Action
1 Measure the power supply wave form between pin 1 and 2 of X1M for the outdoor units or
between pin 1 and 2 of X2M for the indoor units.
2 Check whether the power supply wave form is a sine wave:
3 Check whether there is wave form disturbance near the zero cross:
4 Adjust the supply voltage.
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