Operating Instructions

4 Faults and alarms
4.2 List of faults and alarms
SINAMICS G120 CU230P-2 Control Units
808 List Manual, 04/2018, A5E33838102
A07903 Drive: Motor speed deviation
Message class: Application/technological function faulted (17)
Reaction: NONE
Acknowledge: NONE
Cause: The absolute value of the speed difference from the setpoint (p2151) and the speed actual value (r2169) exceeds the
tolerance threshold (p2163) longer than tolerated (p2164, p2166).
The alarm is only enabled for p2149.0 = 1.
Possible causes:
- the load torque is greater than the torque setpoint.
- when accelerating, the torque/current/power limit is reached. If the limits are not sufficient, then it is possible that the
drive has been dimensioned too small.
- for active Vdc controller.
For U/f control, the overload condition is detected as the I_max controller is active.
See also: p2149 (Monitoring configuration)
Remedy: - increase p2163 and/or p2166.
- increase the torque/current/power limits.
- deactivate alarm with p2149.0 = 0.
A07910 (N) Drive: Motor overtemperature
Message class: Motor overload (8)
Reaction: NONE
Acknowledge: NONE
Cause: KTY84/PT1000 or no sensor:
The measured motor temperature or the temperature of the motor temperature model 2 has exceeded the alarm
threshold (p0604). The response parameterized in p0610 becomes active.
PTC or bimetallic NC contact:
The response threshold of 1650 Ohm was exceeded or the NC contact opened.
Alarm value (r2124, interpret decimal):
11: No output current reduction.
12: Output current reduction active.
See also: p0604 (Mot_temp_mod 2/sensor alarm threshold), p0610 (Motor overtemperature response)
Remedy: - check the motor load.
- check the motor ambient temperature.
- check KTY84/PT1000.
- check overtemperatures of the motor temperature model 2 (p0626 ... p0628).
See also: p0612 (Mot_temp_mod activation), p0625 (Motor ambient temperature during commissioning), p0626
(Motor overtemperature, stator core), p0627 (Motor overtemperature, stator winding), p0628 (Motor overtemperature
rotor)
A07920 Drive: Torque/speed too low
Message class: Application/technological function faulted (17)
Reaction: NONE
Acknowledge: NONE
Cause: For p2193 = 1:
The torque deviates from the torque/speed envelope characteristic (too low).
For p2193 = 2:
The speed signal from the external encoder (refer to p3230) deviates from the speed (r2169) (too low).
See also: p2181 (Load monitoring response)
Remedy: - check the connection between the motor and load.
- adapt the parameterization corresponding to the load.