Siemens SINAMICS G120 - Page 369

Alarms, faults and system messages
11.5 List of alarms and faults
Inverter with CU230P-2 Control Units
Operating Instructions, 11/2013, FW V4.6.6, A5E02430659B AG
369
Number
Cause
Remedy
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 the current limits (p0640).
Vector control: Check the current controller (p1715, p1717).
U/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
parameterization.
Check the 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.
F07900 Motor blocked Check that the motor can run freely.
Check the torque limits (r1538 and r1539).
Check the parameters of the "Motor blocked" message (p2175, p2177).
F07901 Motor overspeed Activate the precontrol for the speed limiting controller (p1401 bit 7 = 1).
Increase the hysteresis for overspeed signal p2162.
F07902 Motor stalled Check whether the motor data has been set correctly and perform a
motor identification.
Check the current limits (p0640, r0067, r0289). If the current limits are too
low, the drive cannot be magnetized.
Check whether motor cables are disconnected during operation.