IMO iDrive Instruction Manual page 78

Troubleshooting for OC, OL error displays
displays OC or OL errors
iDrive
Is the main circuit
I.G.B.T. OK?
YES
Any
abnormalities in
appearances?
No
Apply the power
Any abnormal
indications?
No
Input operation commands
Does output frequency
continue to be
displayed or display
shows SP1?
YES
Yes
Input frequency command.
Is the output frequency
of the operating unit
displayed?
YES
Are there voltage
outputs at T1, T2, and
T3 output terminals?
YES
Connect motor and test run.
Any abnormal
values displayed?
NO
Are output
currents of each
phase even?
YES
The inverter's output is OK
NO
Yes
YES
o
N
Replace the control board
NO
Replace the control board
NO
Replace the control board
YES
NO
5-9
Chapter 5 Trouble shooting and maintenance
Replace I.G.B.T Module
Replace faulty circuit boards
Is the current
detector OK?
YES
Replace the control board
Is the control board
working well after
replacement?
‧
Inverter faulty.
The inverter faults
Contact your iDrive supplier
Perform detailed checks
NO
Replace the current sensing
circuit
NO
YES