Siemens SINAMICS G120C - Page 81

Troubleshooting and additional information
5.1 List of alarms and faults
SINAMICS G120C, FSD ... FSF inverters
Compact Operating Instructions, 11/2016, FW V4.7 SP6, A5E39339884B AA
81
Number
Cause
Remedy
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.
Create 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 automati-
cally switched back on.
F07330 Search current measured too
low
Increase search current (P1202), check motor connection.
A07400 V
DC_max
controller active If the controller is not to intervene:
• Increase the ramp-down times.
• Deactivate the V
DC_max
controller (p1240 = 0 for vector control, p1280 = 0
for V/f control).
A07409 V/f control, current limiting con-
troller active
The alarm automatically disappears after one of the following measures:
• Increase the current limit (p0640).
• Reduce 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 (auto-
tuning) because of a fault.
Remedy: Increase p2355 and restart autotuning.
F07801 Motor overcurrent Check current limits (p0640).
V/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.
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 External alarm 1 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.