Everwell MKTH1223E-16 - 3.2.8 Troubleshooting EU: ODU Voltage Test Sensor Failure

Air Conditioner Service Manual
37
3.2.8 EU---ODU voltage test sensor failure
After power relay works, when tested voltage effective value less than 50V for 3s continuously, unit will display EU.
Start
Display EU
Test voltage btw ODU
terminal L/N, more than
50V~?
End
Replace ODU PCB
Check while voltage
become normal
Yes
No
No
Yes
Unit works?