Siemens SINAMICS PERFECT HARMONY GH180 - Table 11-12 User Defined Faults

Fault Display Type Enable Potential Causes and Corrective Actions
Bypass Hardware Alarm A Fixed Cause
This alarm occurs when the mechanical bypass is enabled, no Cell Bypass
Link Alarm and Cell Bypass Com Alarm are detected, and any one of the
following occur(s):
• Coil acknowledges are not valid (i.e., acknowledge is high when in-
bypass is not requested).
• Bypass board does not acknowledge enable signal.
• 32 V is missing on the bypass board.
• 72 V is missing on the bypass board.
• Watchdog Reset is active on the bypass board.
• Power Reset is active on the bypass board.
Action
1. Check supply voltage to MV bypass board.
2. Replace MV bypass board.
xx Bypass Verify Failed
xx = cell that is faulted
F Fixed Cause
Bypass contactor closure verify failed. Request and acknowledge do not
match.
Action
Check bypass system and contactor MV bypass board.
xx Bypass Ack Failed
xx = cell that is faulted
F Fixed Cause
Bypass contactor closure acknowledge failed.
Action
Check bypass system and contactor MV bypass board.
xx Bypass Avail Warning
xx = cell that is faulted
A Fixed Cause
Cell level bypass unavailable alarm. Only if bypass is used but not active.
Action
Check bypass system, 󹪝ber optic cable, MV bypass board, and supply.
Table 11-12 User De󹪝ned Faults
Fault Display Type Enable Potential Causes and Corrective Actions
User De󹪝ned Fault (64) F/A SOP Cause
The UserFault_1 through UserFault_64 󹪞ags in the
system program have been set to the value "true". Refer
to Chapter AUTOHOTSPOT. These can be set up as either
faults or alarms, and the message can be de󹪝ned via the SOP.
Action
Refer to the section on User Faults (SectionAUTOHOT‐
SPOT " ).
Troubleshooting Faults and Alarms
11.11 Drive Faults and Alarms Cell Bypass Related
NXGPro+ Control Manual
Operating Manual, A5E50491925A 465