Lenze EDB9300UES - Manual (Page 170)

Help in the event of errors
BA8230 165
Short circuit UCE
Cause: The monitor on one of the pulse amplifiers in the inverter detected that the
collector/emitter voltage of the relevant IGBT became excessively high while
conducting. This indicates a short circuit in the power stack or a defective pulse
amplifier.
Remedy: Contact the Service Department.
Plug fault
Cause: The signal chain through all plugs on the printed circuit boards is interrupted.
Remedy:
Check the printed circuit board wiring.
Overload > 60s
Cause: The inverter current in the “frequency control” structure exceeded the rated
current of the inverter for 60 s. As the current limiter is not effective in the frequency
control structure, a shut-down was required.
Remedy:
Check the inverter and motor data settings. Check the continuous load and the load
cycle for the drive.
Overspeed
Cause: The actual speed value is greater than the maximum value setting.
Remedy:
The maximum value is set with the parameter “Ref. overspeed”. Increase this value.
Note:
Speed controller overshooting can trigger this error. Allow an adequate margin from
the required maximum speed.
DC link overvoltage
Cause: The link voltage became excessively high. A hardware trigger stage detected
this.
Remedy:
If no braking device (chopper) is fitted:
a) Check the “mains voltage” parameter
b) Was the rated motor data input correctly and was calibration completed?
c) Increase the time of the “braking ramp”.
If a braking device is fitted:
Check whether the braking resistor is of the correct rating and is connected correctly.
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