51
50
Troubleshooting
Troubleshooting
9.3 Procedure of Troubleshooting
Diagram 1
Diagram 2
(1) IDU Jumper cap error
（C0）
Main detection points:
● Is there jumper cap on the main board?
● Is the jumper cap inserted correctly and tightly?
● The jumper is broken?
● The motor is broken?
● Detection circuit of the mainboard is defined abnormal
Malfunction diagnosis process:
Start
Is there jumper cap on the mainboard?
Is the jumper cap inserted correctly
and tightly?
Replace the jumper cap with
the same model
Assemble the jumper
cap with the same model
Insert the jumper
cap tightly
Is malfunction
eliminated
Is malfunction
eliminated
Is malfunction
eliminated
Replace the mainboard
with the same model
End
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
(2) IDU AC Voltage zero-crossing detection error
（C1）
Main detection points:
● Instant energization afte de-energization while the capacitor discharges slowly
● The zero-cross detection circuit of the mainboard is defined abnormal
Malfunction diagnosis process:
Turn power off for
1minute,the turn
back on
The unit returns to normal.
Conclusion:code is displayed due to
power off/on while the
capacitor discharges slowly.
code is still
displayed
The zero-cross detection circuit
abnormal.Replace the mainboard
with the same model
Yes
No
Start
End
