Siemens · SINAMICS S120/S150 Reference List
This fault is triggered when the actual temperature (r4105[8]) for channel 8 on the Terminal Module 150 (TM150) exceeds its configured fault threshold (p4102[17]), or if an associated timer (p4103[8]) expires. If a BICO interconnection exists, this fault will cause the drive to shut down. The fault will persist until the temperature falls below the threshold (minus hysteresis) and is acknowledged.
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Use an independent, calibrated temperature probe to verify the actual temperature of the component on channel 8, cross-referencing r4105[8].
Check all cooling components like fans, vents, and heat sinks on the TM150 module and the equipment on channel 8 for cleanliness and functionality.
Inspect the wiring connections for the temperature sensor on channel 8 at the TM150 module for any loose terminals or signs of damage.
Review the recent operational history and load of the component connected to channel 8 to identify any conditions that could cause overheating.
If the component's measured temperature is normal but r4105[8] indicates high, replace the temperature sensor connected to TM150 channel 8.
If an engineering assessment deems it appropriate, increase parameter p4102[17] (Fault threshold channel 8) to a level that safely accommodates normal operation.