KEB COMBIVERT F5 Reference Manual page 284

Diagnostics and Troubleshooting
Error/Message Alt. /
(NUM)
Error Over EOP
Voltage (1)
284
*Additional information at end of section
Description Cause/Solution/Troubleshoot
The DC bus The DC bus voltage DG08 and the peak DC bus voltage
voltage rises can be monitored in the Diagnostic screen #1 or DG08
above the and DG30. To reset the logged peak value, press the F4
permissible Reset key from the Diagnostic Screen.
value either
during motor When using a braking resistor to dissipate regenerated
regenerative energy from overhauling or deceleration, the braking
operation or as a resistor should come on at the following levels:
result of line side
voltage spikes.
For 460V drives,
the over voltage If a braking resistor is used:
level is 840VDC
and for 230V
drives, the over
voltage level is
400VDC.
The over voltage
level cannot be If a line regen unit is used:
adjusted.
If the over voltage is due to transient voltage spikes from
the line:
If the over voltage is due to high line voltage:
If there is an issue with the DC bus voltage measurement
circuit:
...continued on next page.
460V = 760VDC
230V = 380VDC
Ensure proper connection of the braking resistor to the
to the braking transistor terminals PB, ++.
Disconnect braking resistor and measure resistance to
verify if correct.
By default, the line regen unit will turn on at 103% of
the idle DC bus voltage.
Ensure proper connection between the drive and
regen unit at the ++ and - - terminals at both units.
Ensure the regen unit is regenerating properly, is
in regen status when it should be and there are no
faults on the regen unit preventing operation.
Install a 3-5% line reactor
Step-down the line voltage with a transformer.