Operating Instructions

Number Cause Remedy
F07801 Motor overcurrent 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.
A07805 Drive: Power unit overload I2t
● Reduce the continuous load.
● Adapt the load cycle.
● Check the assignment of rated currents of the motor and power unit.
F07806 Regenerative power limit exceeded Increase the deceleration ramp.
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.
F07807 Short-circuit detected
● Check the inverter connection on the motor side for any phase-phase
short-circuit.
● Rule out that line and motor cables have been interchanged.
A07850
A07851
A07852
External alarm 1 … 3 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.
F07860
F07861
F07862
External fault 1 … 3 Remove the external causes for this fault.
A07891 Load monitoring, pump/fan blocked
● Check the pump/fan for blockage and rectify if necessary.
● Check the fan for sluggishness and rectify if necessary.
● Adapt the parameterization depending on the load (p2165, p2168).
A07892 Load monitoring, pump/fan without
load
● 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).
A07893 Load monitoring, pump leakage
● Rectify the leakage in the pump circuit.
● For a false tripping, reduce the torque thresholds of the leakage
characteristic (p2186, p2188, p2190).
F07894 Load monitoring, pump/fan blocked
● Check the pump/fan for blockage and rectify if necessary.
● Check the fan for sluggishness and rectify if necessary.
● Adapt the parameterization depending on the load (p2165, p2168).
F07895 Load monitoring, pump/fan without
load
● 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).
Alarms, faults and system messages
8.6 List of alarms and faults
Converter with the CU230P-2 Control Units
416 Operating Instructions, 04/2018, FW V4.7 SP10, A5E34257946B AF