Siemens SINAMICS G120 Operating Instructions Manual page 381

Number Cause
A07904 External armature short-circuit:
"Closed" contactor feedback signal
missing
F07905 External armature short-circuit:
"Open" contactor feedback signal
missing
A07908 Internal armature short-circuit
active
F07909 Internal voltage protection:
Deactivation only active after
POWER ON
A07910 Motor overtemperature
A07920 Torque/speed too low
A07921 Torque/speed too high
A07922 Torque/speed out of tolerance
F07923 Torque/speed too low
F07924 Torque/speed too high
A07927 DC braking active
F7966 Check commutation angle
F7969 Pole position identification incorrect An error has occurred during the pole position identification.
A07980 Rotary measurement activated
A07981 No enabling for rotary
measurement
A07991 Motor identification activated
Converter with the CU250S-2 Control Unit (vector)
Operating Instructions, 06/2013, FW V4.6, A5E31759476B AB
Remedy
When closing, the contactor feedback signal (p1235) did not signal
"closed" (r1239.1 = 1) within the monitoring time (p1236).
Check the following:
Has the contactor feedback signal been incorrectly connected
•
(p1235)?
Contactor feedback signal logic (r1239.1 = 1: "Closed", r1239.1 = 0:
•
"Open").
Increase the monitoring time (p1236).
When opening, the contactor feedback signal (p1235) did not signal
"open" (r1239.1 = 0) within the monitoring time (p1236).
Check the following:
Has the contactor feedback signal been incorrectly connected
•
(p1235)?
Contactor feedback signal logic (r1239.1 = 1: "Closed", r1239.1 = 0:
•
"Open").
Increase the monitoring time (p1236).
The motor is short-circuited via the power semiconductor (r1239.5 = 1).
The inverter has activated the "Internal voltage protection" function"
(p1231 = 3). Deactivation of the internal voltage protection (p1231 not
equal to 3) only becomes active after POWER ON.
Check the motor load.
Check the motor's ambient temperature.
Check the KTY84 sensor.
Check the overtemperatures of the thermal model (p0626 ... p0628).
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.
•
Check the connection between the motor and the load.
•
Adapt the parameterization corresponding to the load.
•
Not required
Carry out pole position identification.
Check the following:
Motor connection
•
Motor data
•
Not required
Acknowledge pending faults.
Establish missing enables (see r00002, r0046).
Switch on the motor and identify the motor data.
Alarms, faults and system messages
11.5 List of alarms and faults
381