Sinamics Perfect Harmony Gh180 6Sr41 Manufactured In Nma Nuernberg, Germany - Siemens GH180 Operating Instructions Manual

Operation
8.3 General Troubleshooting Information
Handling Failed Bypass Faults
This fault results from the failure of a cell to go into bypass when faulted. The cause can be
from a defective modulator board, bad link between the modulator and the MV bypass board,
a defective MV bypass board or supply, or a defective bypass contactor.
Course of Action
● Find and replace the faulty components.
Handling VDC Undervoltage Faults
The undervoltage fault occurs when the voltage drops below the threshold of the detection
circuitry on the CCB. This can be the result of a low MV level coupled with a high current
drainage by the load, or simply as an excessive load that may give a momentary dip in current.
It can also occur if one of the AC power fuses fails under load.
Course of Action
● Check the cell fuses and check the historic log for line dips.
● Correct the problem before continuing operation. A faulty CCB could give a false indication
● Replace defective or faulty parts.
8.3.2 Cell Over Temperature Faults
Cell Over Temperature Faults
Cell overtemperature faults are typically caused by problems in the cooling system. Use the
following steps to troubleshoot this type of fault:
Course of Action
1. Check the cooling system for proper flows and temperatures.
2. Inspect cell cooling paths for kinked hoses or major leaks.
3. Be sure all cell cabinet manifold valves are fully open.
4. Check that the blowers are working properly.
5. Check ambient temperature.
6. Verify that all cabinet doors are shut to ensure proper air flow.
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SINAMICS PERFECT HARMONY GH180 6SR41 manufactured in NMA Nuernberg, Germany

Operating Instructions Rev.201706301306