Alarms, faults and system messages
8.6 List of alarms and faults
Converter with the control units CU240D-2
Operating Instructions, 04/2018, FW V4.9 SP10, A5E34262100B AF
279
Number Cause
Remedy
F07320
Automatic restart aborted
Increase the number of restart attempts (p1211). The actual number of
start attempts is shown in r1214.
Increase the wait time in p1212 and/or monitoring time in p1213.
Connect an ON command (p0840).
Increase the monitoring time of the power unit or switch off (p0857).
Reduce the wait time for resetting the fault counter p1213[1] so that fewer
faults are registered in the time interval.
A07321
Automatic restart active
Explanation: The automatic restart (AR) is active. During voltage recovery
and/or when remedying the causes of pending faults, the drive is auto-
matically switched back on.
F07330
Search current measured too low
Increase search current (p1202), check motor connection.
A07400
V
DC_max
controller active
If it is not desirable that the controller intervenes:
•
Increase the ramp-down times.
•
Deactivate the V
DC_max
controller (p1240 = 0 for vector control, p1280
= 0 for U/f control).
A07409
U/f control, current limiting control-
ler active
The alarm automatically disappears after one of the following measures:
•
Increase the current limit (p0640).
•
Reduce the load.
•
Slow down the up ramp for the setpoint speed.
F07426
Technology controller actual value
limited
•
Adapt the limits to the signal level (p2267, p2268).
•
Check the actual value scaling (p2264).
F07801
Motor overcurrent
Check current limits (p0640).
Vector control: Check current controller (p1715, p1717).
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.
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 deceleration ramp.
Reduce driving load.
Use 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.