Siemens SINAMICS G150 Manual page 1418

4 Faults and alarms
4.2 List of faults and alarms
Fault value (r0949, interpret decimal):
Number of the power unit involved.
Remedy: - acknowledge power unit faults that are still present.
- inhibit the pulses of the power unit involved (p7001).
A05052 (F) Parallel circuit: Illegal current dissymmetry
Message value: %1
Message class: Application / technological function faulted (17)
Drive object: B_INF, VECTOR_G
Reaction: NONE
Acknowledge: NONE
Cause: The deviation of the individual currents of the power units exceeds the alarm threshold specified in p7010.
Alarm value (r2124, interpret decimal):
1: Phase U.
2: Phase V.
3: Phase W.
Remedy: - inhibit the pulses of the faulted power unit (p7001).
- check the connecting cables. Loose contacts can cause current spikes.
- the motor reactors are non-symmetrical or faulty and must be replaced.
- the CTs must be calibrated or replaced.
Reaction upon F: Vector: NONE (OFF1, OFF2, OFF3, STOP2)
Infeed: NONE (OFF1, OFF2)
Acknowl. upon F: IMMEDIATELY
A05053 (F) Parallel circuit: Inadmissible DC link voltage dissymmetry
Message value: -
Message class: Application / technological function faulted (17)
Drive object: B_INF, VECTOR_G
Reaction: NONE
Acknowledge: NONE
Cause: The deviation of the DC link voltage measured values exceeds the alarm threshold specified in p7011.
Remedy: - inhibit the pulses of the faulted power unit (p7001).
- check the DC link connecting cables.
- the DC link voltage measurement is incorrect and must be calibrated or renewed.
Reaction upon F: Vector: NONE (OFF1, OFF2, OFF3, STOP2)
Infeed: NONE (OFF1, OFF2)
Acknowl. upon F: IMMEDIATELY
A05054 Parallel circuit: Power unit de-activated
Message value: %1
Message class: Error in the parameterization / configuration / commissioning procedure (18)
Drive object: B_INF, VECTOR_G
Reaction: NONE
Acknowledge: NONE
Cause: For the drive object involved, fewer power units connected in parallel are active than exist in the target topology.
Operation is only possible at reduced power (power derating).
Remedy: Re-activate the de-activated power units if required.
See also: p0125 (Activate/de-activate power unit components), p0895 (Activate/de-activate power unit components),
p0897 (Parking axis selection)
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SINAMICS G130/G150
List Manual (LH2), 04/2014, A5E03263479A