Table of Contents
Advertisement
9.2.4 U8 Malfunction
Possible causes:
1.The controller diagnoses incorrectly due to instant energization after de-energized while the capacitor discharges slowly;
2.Malfunction of the zero-cross detection circuit of the mainboard.
See the flow chart below
38
Troubleshooting
for U8 malfunction
Re-energize1
minute after
de-erergization
U8 is still
displayed
Yes
The zero-cross detection
circuit of the mainboard is
defined abnormal.Replace
the mainboard with the same
model
End
The unit returns to normal.
Conclusion:U8 is displayed due
No
to instant energization afte de-
energization while the capacitor
discharges slowly.
Troubleshooting
Volver al inicio
Advertisement
Table of Contents
