Siemens SINAMICS G120D - Page 320

Alarms, faults and system messages
11.6 List of alarms and faults
Converter with control units CU250D-2
320 Operating Instructions, 04/2014, FW V4.7, A5E34261542B AA
Number
Cause
Remedy
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 converter 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: Rectify the cause of these alarms.
F07860
F07861
F07862
External fault 1 … 3 Remove the external causes for these faults.
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 precontrol of the speed limiting controller (p1401 bit 7 = 1).
Increase hysteresis for overspeed signal p2162.
F07902 Motor stalled Check whether the motor data has been parameterized correctly and
perform 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.
A07903 Motor speed deviation Increase p2163 and/or p2166.
Increase the torque, current and power limits.
A07910 Motor overtemperature Check the motor load.
Check the motor's ambient temperature.
Check the KTY84 sensor.
Check the overtemperatures of the thermal model (p0626 ... p0628).
A07920
Torque/speed too low
The torque deviates from the torque/speed envelope curve.
• Check the connection between the motor and the load.
• Adapt the parameterization corresponding to the load.
A07921
Torque/speed too high
A07922 Torque/speed out of tolerance
F07923
Torque/speed too low
• Check the connection between the motor and the load.
• Adapt the parameterization corresponding to the load.
F07924 Torque/speed too high
A07927
DC braking active
Not required
A07975 Traverse to the zero mark -
setpoint input expected
The alarm disappears when the zero mark is detected.
A07980
Rotary measurement activated
Not required
A07981 No enabling for rotary
measurement
Acknowledge pending faults.
Establish missing enables (see r00002, r0046).
A07991
Motor data identification activated
Switch on the motor and identify the motor data.