Drive Faults And Alarms Cell Bypass Related; Table 11-11 Cell Bypass Related Faults - Siemens SINAMICS PERFECT HARMONY GH180 Function Manual

Troubleshooting Faults and Alarms

11.11 Drive Faults and Alarms Cell Bypass Related

11.11 Drive Faults and Alarms Cell Bypass Related
Handling Cell Bypass Related Faults
Table 11-11 Cell bypass related faults
Fault Display
Cell Bypass COM Fail
Cell Bypass Acknowledge
Cell Bypass Link
Cell Bypass COM Alarm
Cell Bypass Link Alarm
Cell Bypass Fault
464
Type Enable Potential Causes and Corrective Actions
F Fixed Cause
The control system is not communicating with the MV bypass board. By‐
pass is in use.
Action
1. Verify the fiber optic connection between the DCR and MV bypass
board is intact.
2. Replace MV bypass board.
3. Replace DCR.
F Fixed Cause
The control issued a command to bypass a cell, but the MV bypass board
did not return an acknowledgement.
Action
1. Verify that the bypass contactor is working properly.
2. Check wiring between MV bypass board and contactor.
3. Replace MV bypass board or contactor.
F Fixed Cause
The control system is not communicating with the MV bypass board, i.e.
the MV bypass board is either not receiving commands, or is getting parity
errors in the messages from the modulator. Bypass is in use.
Action
Refer to Cell bypass COM fail above.
A Fixed Cause
The control system is not communicating with the MV bypass board, but
the bypass system is not in use.
Action
Refer to Cell bypass COM fail above.
A Fixed Cause
The modulator is not communicating with the MV bypass board, but the
bypass system is not in use.
Action
Refer to Cell bypass COM fail above.
F Fixed Cause
The cell failed to go into bypass when commanded to do so.
Action
1. Check bypass system and contactor MV bypass board.
2. Refer to Cell bypass COM fail above.
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