KEB COMBIVERT F5 Reference Manual page 285

Error/Message Alt. /
(NUM)
Error Over EOP
Voltage (1)
(continued)
Error Power EPU
Unit (12)
Error Power EPuch
Unit Changed (50)
Error Power EPuci
Unit Invalid (49)
Error Rotor (168)
Learn Deviation
*Additional information at end of section
Diagnostics and Troubleshooting
Description Cause/Solution/Troubleshoot
If a braking resistor is used and there is an issue with the
braking transistor:
If there is an issue due to high frequency noise:
General power Inverter must be inspected and repaired by KEB or
circuit fault replaced.
The control card This error should automatically clear itself.
recognizes a new
power stage (the
control card was
changed).
During the This error could occur from noise.
initialization the
power circuit
could not be
recognized
or was identified
as invalid
When LE07 Rotor Detection Mode = NOP and LX23
Encoder Deviation Enable = On with Error. Learned
encoder pole position and average encoder position
having a difference value greater than LX22 Encoder
Deviation Value
Refer to Encoder slippage/mounting problems in Section
7..3 for additional information.
Measure DC bus directly and verify against DC bus
voltage read from the Diagnostics screen. The DC
bus should be approximately 1.41xAC Input phase-to-
phase.
Test the braking transistor. (See Appendix)
Verify proper mains grounding.
Disconnect terminal strip, encoder cable and serial
comm. (if used) and power cycle the drive.
Check phase-to-phase and phase-to-ground line
voltages to make sure they are balanced and not
causing noise.
Re-seat ribbon cable connecting control card to power
stage.
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