Operating Instructions

Number Cause Remedy
F07086
F07088
Switching over units: Parameter lim‐
it violation
Check the adapted parameter values and if required correct.
F07320 Automatic restart aborted Increase the number of restart attempts (p1211). The current 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 automat‐
ically switched back on.
F07330 Search current measured too low Increase the search current (p1202), check the motor connection.
A07353 DC quantity control deactivated The controller to suppress DC components in the motor current was at its
limit and deactivated itself.
● Increase the integral time p3858 of the DC quantity controller
● Decrease the gain p3857 of the DC quantity controller
F07390 Forming the DC link capacitors was
faulty
The inverter has canceled the "Forming the DC link capacitors" function
(r3382.3 = 1). The expected DC link voltage is outside the tolerance.
● Check the inverter, e.g. supply voltage and connecting terminals
● Set the forming duration again (p3380 > 0), and restart forming.
A07391 Forming the DC link capacitors ac‐
tive
The "DC link forming" function is active. After forming has been completed,
the inverter withdraws the alarm (r3382.2 = 1).
A07400 DC-link voltage maximum controller
active
If the controller is not to intervene:
● Increase the ramp-down times.
● Deactivate the Vdc_max control (p1240 = 0 for vector control, p1280 =
0 for U/f control).
A07409 V/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.
● Increase the ramp-up time to the speed setpoint.
F07426 Technology controller actual value
limited
● Adapt the limits to the signal level (p2267, p2268).
● Check the actual value scaling (p2264).
A07444 PID autotuning is activated Automatic setting of the PID controller (autotuning) is active (p2350 > 0).
The alarm disappears automatically after completion of the autotuning.
F07445 PID autotuning canceled The inverter has canceled the automatic setting of the PID controller (au‐
totuning) because of a fault.
Remedy: Increase p2355 and restart autotuning.
Alarms, faults and system messages
8.6 List of alarms and faults
Converter with the CU230P-2 Control Units
Operating Instructions, 04/2018, FW V4.7 SP10, A5E34257946B AF 415