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

Fault Display
Bypass Hardware Alarm
xx Bypass Verify Failed
xx = cell that is faulted
xx Bypass Ack Failed
xx = cell that is faulted
xx Bypass Avail Warning
xx = cell that is faulted
Table 11-12 User Defined Faults
Fault Display
User Defined Fault (64)
NXGPro+ Control Manual
Operating Manual, A5E50491925A
Type Enable Potential Causes and Corrective Actions
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.
F Fixed Cause
Bypass contactor closure verify failed. Request and acknowledge do not
match.
Action
Check bypass system and contactor MV bypass board.
F Fixed Cause
Bypass contactor closure acknowledge failed.
Action
Check bypass system and contactor MV bypass board.
A Fixed Cause
Cell level bypass unavailable alarm. Only if bypass is used but not active.
Action
Check bypass system, fiber optic cable, MV bypass board, and supply.
Type Enable
F/A SOP
Troubleshooting Faults and Alarms
11.11 Drive Faults and Alarms Cell Bypass Related
Potential Causes and Corrective Actions
Cause
The UserFault_1 through UserFault_64 flags 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 defined via the SOP.
Action
Refer to the section on User Faults (SectionAUTOHOT‐
SPOT " ).
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