Cell Faults And Alarms; Cell Faults/Alarms Prolog; Table 11-13 Specific (Individual) Cell Faults - Siemens SINAMICS PERFECT HARMONY GH180 Function Manual

Troubleshooting Faults and Alarms

11.12 Cell Faults and Alarms

11.12 Cell Faults and Alarms
11.12.1

Cell Faults/Alarms Prolog

Cell originating faults and alarms are logged by the PC board following a power cell fault
indication. These faults are available for inspection using one of the following methods
• through the keypad display
• uploaded to a PC via the serial port
• uploaded to a PC via the Drive Tool
All active cell faults and alarms are displayed on the keypad display. Use the arrow keys to scroll
up and down through the faults. Use the alarm/fault log upload function (6230) in the alarm/
fault log menu (6210) to upload the log to a PC for analysis and for sending to the appropriate
Siemens or plant personnel.
All cell faults are generated by circuitry located on the cell control board (CCB) of each power cell
and are received by the microprocessor board through circuitry on the digital modulator. Use the
following table as a quick troubleshooting guide to locate the cause of the fault condition. This
table lists faults that may occur in all SINAMICS PERFECT HARMONY GH180 drives unless
otherwise noted. All cell faults are initiated by the CCB located in each power cell
Handling Specific (Individual) Cell Faults
Table 11-13 Specific (individual) cell faults
Fault display
xx 2Q Diode shorted
xx = cell that is faulted
xx Diode or Phase Open
xx = cell that is faulted
466
Type Enable Potential causes and corrective actions
F Fixed Cause
The cell has sensed that a diode is in a short circuit condition.
Action
The cell needs to be replaced. The drive cannot operate with a short-
circuited diode, medium voltage will be disconnected.
F Fixed Cause
The cell has sensed that either a diode has failed in an open condition, or
a cell single-phase condition was detected. In either case the cell will issue
an Alarm and it can continue to run, however it is recommended to reduce
the power.
Action
1. It is recommended to verify if input cell fuses are not open.
2. If the diode has failed it is recommended to have the cell repaired or
replaced.
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