Troubleshooting Sheet

12
,QVWDOODWLRQDQG0DLQWHQDQFH
 0DOIXQFWLRQRI=HURFURVVLQJ,QVSHFWLRQ&LUFXLW0DOIXQFWLRQRIWKH,'8)DQ0RWRU8
Tr oubleshooting
for U8 malfunction
Re-energize1
minute after
de-erergization
U8 is still
displayed
The unit returns to normal.
Conclusion:U8 is displayed due
to instant energization afte de-
energization while the capacitor
discharges slowly.
The zero-cross detection
circuit of the mainboard is
defined abnormal.Replace
the mainboard with the same
model
End
No
Yes
7URXEOHVKRRWLQJ