Alarms, faults and system messages
9.5 List of faults
Inverter with CU240B-2 and CU240E-2 Control Units
Operating Instructions, 07/2010, FW 4.3.2, A5E02299792B AA
257
Number Cause
Remedy
F07900
Motor blocked
Check that the motor can run freely.
Check the torque limits (r1538 and r1539).
Check the parameters of the "Motor blocked" message (P2175, P2177).
F07901
Motor overspeed
Activate precontrol of speed limiting controller (P1401 bit 7 = 1).
Increase hysteresis for overspeed message P2162.
F07902
Motor stalled
Check whether the motor data has been parameterized correctly and
perform motor identification.
Check the current limits (P0640, r0067, r0289). If the current limits are too
low, the drive cannot be magnetized.
Check whether motor cables are disconnected during operation.
F30001
Overcurrent
Check the following:
Motor data, if required, carry out commissioning
Motor's connection method (Υ / Δ)
V/f operation: Assignment of rated currents of motor and Power
Module
Line quality
Make sure that the line commutating reactor is connected properly
Power cable connections
Power cables for short-circuit or ground fault
Power cable length
Line phases
If this doesn't help:
V/f operation: Increase the acceleration ramp
Reduce the load
Replace the power unit
F30002
DC-link voltage overvoltage
Increase the ramp-down time (p1121).
Set the rounding times (P1130, P1136).
Activate the DC-link voltage controller (P1240, P1280).
Check the line voltage (P0210).
Check the line phases.
F30003
DC-link voltage undervoltage
Check the line voltage (P0210).
F30004
Inverter overtemperature
Check whether the inverter fan is running.
Check whether the ambient temperature is in the permissible range.
Check whether the motor is overloaded.
Reduce the pulse frequency.
F30005
I2t inverter overload
Check the rated currents of the motor and Power Module.
Reduce current limit P0640.
When operating with V/f characteristic: Reduce P1341.
F30011
Line phase failure
Check the inverter's input fuses.
Check the motor cables.