Siemens SINAMICS PERFECT HARMONY GH180 Function Manual page 482

Troubleshooting Faults and Alarms
11.12 Cell Faults and Alarms
Fault Display
xx 2H T2 Thermistor Loss
xx = cell that has alarm
xx Humidity Sensor Temp
xx = cell that has alarm
xx AFE Not Ready Warn
xx = cell that has alarm
xx In/Out Sensor Loss
xx = cell that has alarm
480
Type Enable Potential causes and corrective actions
A Fixed Cause
This Alarm only applies when 4Q air cooled cells are installed. This Alarm
is generated whenever one or more H Bridge Thermistor feedback cannot
be detected by the CCB. This is generally the case when the CCB is mal‐
functioning, or connection between CCB and AFE Extension board is not
present, or the NTC wiring is incorrect/damaged.
Action
If there are no other faults, bypass or replace the cell.
A Fixed Cause
This Alarm only applies when 4Q Air Cooled Cells are installed. This alarm
is generated when the Humidity sensor detects a temperature above 60C
or below 5C inside the cell. This temperature is sensed by a sensor on the
CCB.
Action
Action
1. Verify that proper cooling is provided for the drive. Inspect and verify
air filters are not clogged.
2. Replace filters if needed.
3. Verify that the ambient temperature in the environment in which the
drive is operated is within the operating conditions of the drive.
4. Verify the load does not exceed the maximum current capability of the
drive.
5. Wait at least 5 minutes and then try to reset the fault. If the fault
doesn't reset and if there are no other faults, bypass or replace the cell.
A Fixed Cause
This alarm only applies when AFE cells that use AP are used in the system.
This alarm is caused by the following conditions:
• Medium voltage is OK
• Cell Diagnostics is finished
• AfeReadyToRun_I is false
• InvReadyToRun_I is true
Action
1. Determine cause of cell alarm.
2. Re-run the angles on the cells.
3. Check cell input fuses.
4. Check running of fiber optics.
5. Replace the CCB.
A Fixed Cause
This alarm occurs when either the heatsink OT sensor or the inlet temper‐
ature sensor detect a condition higher than their setpoint. This applies
only to 1375 HV AP cells.
Action
1. Check for restricted water flow to the cell and correct as necessary.
2. Fix any loose connections.
3. Replace CCB or replace cell.
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