Siemens SINAMICS G120 Operating Instructions Manual page 410

Alarms, faults and system messages
8.6 List of alarms and faults
Number Cause
F07801 Motor overcurrent
A07805 Drive: Power unit overload I2t
F07806 Regenerative power limit exceeded Increase the deceleration ramp.
F07807 Short-circuit detected
A07850 External alarm 1 ... 3
A07851
A07852
F07860 External fault 1 ... 3
F07861
F07862
A07891 Load monitoring, pump/fan blocked ● Check the pump/fan for blockage and rectify if necessary.
A07892 Load monitoring, pump/fan without
load
A07893 Load monitoring, pump leakage
F07894 Load monitoring, pump/fan blocked ● Check the pump/fan for blockage and rectify if necessary.
F07895 Load monitoring, pump/fan without
load
410
Remedy
Check current limits (p0640).
Vector control: Check current controller (p1715, p1717).
V/f control: Check the current limiting controller (p1340 ... p1346).
Increase the acceleration ramp (p1120) or reduce the load.
Check the motor and motor cables for short-circuit and ground fault.
Check the motor regarding the star/delta connection and rating plate pa‐
rameterization.
Check power unit / motor combination.
Select the 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.
Reduce the driving load.
Use a power unit with higher energy recovery capability.
For vector control, the regenerative power limit in p1531 can be reduced
until the fault is no longer activated.
● Check the inverter 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.
Parameters p2112, p2116 and p2117 determine the signal sources for the
external alarm 1... 3.
Remedy: Remove the causes of these alarms.
Remove the external causes for this fault.
● Check the fan for sluggishness and rectify if necessary.
● Adapt the parameterization depending on the load (p2165, p2168).
● For a pump, check the conveyor medium and provide if necessary.
● For a fan, check the belt and replace if necessary
● If necessary, increase the torque threshold for detection (p2191).
● Rectify the leakage in the pump circuit.
● For a false tripping, reduce the torque thresholds of the leakage
characteristic (p2186, p2188, p2190).
● Check the fan for sluggishness and rectify if necessary.
● Adapt the parameterization depending on the load (p2165, p2168).
● For a pump, check the conveyor medium and provide if necessary.
● For a fan, check the belt and replace if necessary
● If necessary, increase the torque threshold for detection (p2191).
Operating Instructions, 09/2017, FW V4.7 SP9, A5E34257946B AE
Converter with the CU230P-2 Control Units