43
ANTRIEBSTECHNIK
GB
Error Diagnosis
Error messages are represented with an "E. " and the corresponding
error in the display of the KEB COMBIVERT. The displays and their
causes are described below.
Occurs, when the intermediate ciruict voltage falls below the permissible value.
Possible causes are - input voltage too low or unstable
- inverter power too small
- voltage loss due to incorrect cabling
- power supply by generator/transformer breaks down,
because ramps are too short
Occurs, when the intermediate circuit voltage rises above over the
permissible value.
Possible causes are - input voltage too high
- disturbance voltages at the input
- delay ramps too short
Occurs, when exceeding the peak current or at ground fault.
Occurs when a too high load is applied for more than the allowed time
(see "Performance Data"). Possible causes for this are
- error or overload in the application
- inverter incorrectly dimensioned
- motor incorrectly wired
After error E. OL you must wait for a cooling down time. This message
appears after the cooling down phase is completed. The error can be
reset.
Occurs, when the heat sink temperature > 85°C. Possible causes for this
are - insufficient cooling
- surrounding temperature too high
Internal or external excess-temperature error do not occur anymore.
Error "E. OH" can be reset.
Current limit resistor not bridged, occurs for a short time during the turn on
phase and is reset immediately. If the erorr message remains the following
may be the cause - incorrect or input voltage too small
- high loss in the supply line
5. Error Diagnosis
Undervoltage
Overvoltage
Overcurrent
Overload
Cooling down phase
completed
Overheat
no Overheat
Current limit resistor error
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