Aiwa -09CHSRINV/TP11 Service Manual page 45

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