Siemens SINAMICS PERFECT HARMONY GH180 Function Manual page 469

Fault display
xx 2H T2 Thermistor Los
xx = cell that has alarm
xx 2H T1 Thermistor Los
xx = cell that has alarm
xx Ambient Temp Warn
xx = cell that has alarm
xx Ambient Temp Fault
xx = cell that is faulted
xx T1 NTC Temp Warning
xx = cell that has alarm
NXGPro+ Control Manual
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Type Enable Potential causes and corrective actions
A Fixed Cause
There is a potential problem with the T2 IGBT Thermistor, and there is no
longer a valid reading from the thermistor.
This condition indicates that either the thermistor inside the IGBT has
failed or the wire harness connecting this thermistor to the CCB is discon‐
nected
Action
1. The cell may be bypassed if a bypass contactor is provided.
2. Verify if wire harness from IGBT to the CCB is not damaged.
3. It is recommended to have the cell repaired or replaced.
A Fixed Cause
There is a potential problem with the T1 IGBT Thermistor, and there is no
longer a valid reading from the thermistor.
This condition indicates that either the thermistor inside the IGBT has
failed or the wire harness connecting this thermistor to the CCB is discon‐
nected.
Action
1. The cell can be bypassed if a bypass contactor is provided.
2. Verify wire harness from IGBT to the CCB is not damaged.
3. It is recommended to have the cell repaired or replaced.
A Fixed Cause
The ambient temperature sensor reading has exceeded the alarm thresh‐
old.
Action
1. Verify if the cooling fans are operating.
2. Verify if the drive ambient temperature is above the ambient alarm
level temperature.
3. Verify if filters are clogged and / or need to be replaced.
F Fixed Cause
The ambient temperature sensor reading has exceeded the fault thresh‐
old.
Action
1. Verify if the cooling fans are operating.
2. Verify the load current doesn't exceed the cell current capability.
3. Verify if the drive ambient temperature is above the ambient alarm
level temperature.
4. Verify if filters are clogged and / or need to be replaced.
A Fixed Cause
The T1 NTC temperature has surpassed the alarm threshold.
Action
1. Verify if the cooling fans are operating.
2. Verify the load current doesn't exceed the cell current capability.
3. Verify if the drive ambient temperature is above the ambient alarm
level temperature.
4. Verify if filters are clogged and / or need to be replaced.
Troubleshooting Faults and Alarms
11.12 Cell Faults and Alarms
467