Siemens SINAMICS G120 Operating Instructions Manual page 293

Number Cause
F07426 Technology controller actual
value limited
F07801 Motor overcurrent
A07805 Drive: Power unit overload I2t
F07807 Short circuit detected
A07850 External alarm 1
F07860 External fault 1
F07900 Motor blocked
F07901 Motor overspeed
F07902 Motor stalled
A07903 Motor speed deviation
A07910 Motor overtemperature
A07920 Torque/speed too low
A07921 Torque/speed too high
A07922 Torque/speed out of tolerance
F07923 Torque/speed too low
F07924 Torque/speed too high
A07927 DC braking active
A07980 Rotary measurement activated
SINAMICS G120C frequency converter
Operating Instructions, 03/2012, FW V4.5, A5E02999804B AB
Remedy
Adapt the limits to the signal level (p2267, p2268).

Check the actual value scaling (p2264).

Check current limits (p0640).
U/f control: Check the current limiting controller (p1340 ... p1346).
Increase acceleration ramp (p1120) or reduce load.
Check motor and motor cables for short circuit and ground fault.
Check motor for star-delta connection and rating plate parameterization.
Check power unit / motor combination.
Select flying restart function (p1200) if switched to rotating motor.
Reduce the continuous load.

Adapt the load cycle.

Check the assignment of rated currents of the motor and power unit.

Check the converter connection on the motor side for any phase-phase

short-circuit.
Rule out that line and motor cables have been interchanged.

The signal for "external alarm 1" has been triggered.
Parameter p2112 defines the signal source of the external alarm.
Remedy: Rectify the cause of this alarm.
Remove the external causes for this fault.
Make sure that the motor can rotate freely.

Check the torque limit: r1538 for a positive direction of rotation; r1539 for

a negative direction of rotation.
Activate precontrol of the speed limiting controller (p1401 bit 7 = 1).
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.
Increase p2163 and/or p2166.
Increase the torque, current and power limits.
Check the motor load.
Check the motor's ambient temperature.
Check the KTY84 sensor.
The torque deviates from the torque/speed envelope curve.
Check the connection between the motor and the load.

Adapt the parameterization corresponding to the load.

Check the connection between the motor and the load.

Adapt the parameterization corresponding to the load.

Not required
Not required
Alarms, faults and system messages
12.4 List of alarms and faults
291