
18. Faults and remedies
The inverter is equipped with devices for error detection and error signalling.
Error signals are routed to the error signalling relay (250V AC 1A; terminals 122, 123 and 124) and
shown on the display.
Fault
Possible cause
Fault remedy
Motor does not run
No mains voltage
Check mains voltage.
ENABLE or START/STOP
missing
The motor can start only when both
signals are active and when a setpoint
deviating from 0 is present.
Setpoint missing
Check setpoint at terminal 8 or 29.
Unit not connected correctly
Check all connections.
Motor blocked
Check drive.
Internal inverter fault
Sending unit for repair.
Motor runs too slowly
“Fmax” is set too low
Increase “Fmax”.
Setpoint not sufficient
(terminal 8 or 29)
Check setpoint.
Motor running with slip
Increase acceleration time or reduce
“Fmax”.
Output current of inverter too high U/f ratio incorrect
Set new U/f ratio or reduce “Fmax”.
Overcurrent during acceleration
Starting torque too high
Reduce starting torque.
Acceleration time too short
Increase acceleration time.
Motor running with slip
Increase acceleration time.
Overvoltage
Mains voltage too high
Measure mains voltage.
Voltage peaks caused by
switching large loads on the
network
Determine cause and take counter-
measures (e.g. mains filter).
Braking operation
Increase deceleration time or use
external braking chopper.
Heat sink temperature too high
Output stage overloaded
Check ambient temperature of inverter.
Check whether inverter is correctly
dimensioned for the application.
BERGES electronic
54
Operating manual ACM D2/S2
09.07.2001
Содержание ACM S2
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