103
Drive Faults
Error/Message Alt. /
(NUM)
Description Cause/Solution/Troubleshoot
Error Over Volt-
age (continued)
EOP
(1)
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.
Error Power
Unit
EPU
(12)
General power
circuit fault
Inverter must be inspected and repaired by KEB or re-
placed.
Error Power
Unit Changed
EPuch
(50)
The control card
recognizes a new
power stage (the
control card was
changed).
This error should automatically clear itself.
Error Power
Unit Invalid
EPuci
(49)
During the initial-
ization the power
circuit could not
be recognized
or was identied
as invalid
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.
Error Rotor
Learn Deviation
(168) 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.
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