KEB COMBIVERT F5 Operation Manual page 103

Error/Message Alt.
(NUM)
Error Over Volt- EOP
age (continued) (1)
Error Power EPU
Unit (12)
Error Power EPuch
Unit Changed (50)
Error Power EPuci
Unit Invalid (49)
Error Rotor (168)
Learn Deviation
/ Description
General power
circuit fault
The control card
recognizes a new
power stage (the
control card was
changed).
During the initial-
ization the power
circuit could not
be recognized
or was identified
as invalid
Cause/Solution/Troubleshoot
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.
If a braking resistor is used and there is an issue with the
braking transistor:
Test the braking transistor. (See Appendix)
If there is an issue due to high frequency noise:
Verify proper mains grounding.
Inverter must be inspected and repaired by KEB or re-
placed.
This error should automatically clear itself.
This error could occur from noise.
Disconnect terminal strip, encoder cable and serial
comm. (if used) and power cycle the drive.
Check phase-to-phase and phase-to-ground line volt-
ages to make sure they are balanced and not causing
noise.
Re-seat ribbon cable connecting control card to power
stage.
When LE07 Rotor Detection Mode = NOP and LX23
Encoder Deviation Enable = On with Error. Learned en-
coder pole position and average encoder position having
a difference value greater than LX22 Encoder Deviation
Value
Refer to Encoder slippage/mounting problems in Section
5.3 for additional information.
Drive Faults
103