TCL TAC-18CSD/XA81I

TCL Air Conditioner Service Manual
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42
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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
Dis
p
la
y
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?