3
ANTRIEBSTECHNIK
9
1
3
KEB COMBIVERT F4-C
Name: Basis
05.06.98
9
Error Assistance
Section
Page
Date
©
KEB Antriebstechnik, 1997
All Rights reserved
Chapter
9.1
Troubleshooting
9.1.1
General
9.
Error
Assistance
The following chapter shall help you to avoid errors as well as help you to determine
and remove the cause of errors on your own.
If error messages or malfunctions occur repeatedly during operation, the first thing to
do is to pinpoint the exact error. To do that go through the following checklist:
- Is the error reproducable ?
For that reset the error and try to repeat it under the same conditions. If the error can
be reproduced, the next step is to find out during which operating phase the error
occurs.
- Does the error occur during a certain operating phase (e.g. always during
acceleration)?
If so, consult the error messages and remove the causes listed there.
- Does the error occur or disappear after a certain time?
That may be an indication for thermal causes. Check, whether the inverter is used in
accordance to the ambient conditions and that no moisture condensation takes place.
9.1.2
Error Messages
and their Cause
Error messages are always represented by an „E“ and the corresponding error in the
display of KEB COMBIVERT. In the following the displayed indications and their causes
are described.
Occurs when the DC-link voltage drops below the permissible value.
Causes:
- input voltage too low or instable
- inverter rating too low
- voltage losses through wrong wiring
- supply voltage from generator/transformer breaks down
at very short ramps
- one phase of input voltage missing
(ripple detection)
Occurs when the DC-link voltage rises above the permissible value.
Causes:
- input voltage too high
- interference voltages at the input
- deceleration ramp too short
Occurs when the specified peak current is exceeded.
Causes:
- acceleration ramps too short
- the load is too high at disabled acceleration stop and
disabled constant current limit
- short circuit at the output
- ground fault
- deceleration ramp too short
- motor cable too long
- EMC
Overvoltage
Undervoltage
Overcurrent
