Siemens SINAMICS PERFECT HARMONY GH180 Function Manual page 473

Fault display
xx Link
xx = cell that is faulted
xx Communication
xx = cell that is faulted
xx Control Fuse Blown
xx = cell that is faulted
xx DC Bus Low Warning
xx = cell that has alarm
xx AC Vav Low Warning
xx = cell that has alarm
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Type Enable Potential causes and corrective actions
F Fixed Cause
A faulted cell indicates a cell communication link failure. The cell failed to
respond to a modulator command packet.
Action
1. Check the fiber optic cable connection on both ends.
2. Cell may need to be serviced.
3. Change fiber optic cable.s
4. Change CCB.
5. Contact Siemens customer service.
F Fixed Cause
An error in the optical communications from the modulator was detected
by a cell. Typically this fault is a result of a parity error caused by noise, but
can also be a time-out error caused by a faulty communications channel
on the CCB.
Action
1. Check fiber connections.
2. Cell might need to be serviced.
3. Change fiber.
4. Change CCB.
5. Contact Siemens customer service.
F Fixed Cause
Cell control power fuse blown. This is rarely seen since the CCB has a dual
source of power.
Action
Check cell fuses, replace if necessary.
A Fixed Cause
Cell DC bus is below alarm level. This fault alarm applies to water-cooled
6SR325, LNG, or HV cells only.
Action
Check for single phase input, low input line conditions, blown input fuses.
A Fixed Cause
Cell AC input is below alarm level. CCB sets alarm level and comes back
from the cell as / Vavail_ok internal flag in all cells except water-
cooled 6SR325, LNG, and HV.
Action
1. Check for single phase input, low input line conditions, blown input
fuses.
2. Check for CCB failure.
Troubleshooting Faults and Alarms
11.12 Cell Faults and Alarms
471