Siemens · SINAMICS S120/S150 Reference List
This fault is triggered when the actual temperature (r4105[1]) for channel 1 on the Terminal Module 120 (TM120) or Terminal Module 150 (TM150) exceeds its configured fault threshold (p4102[3]), or if an associated timer (p4103[1]) 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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Confirm the actual temperature of the component monitored by channel 1 using an independent temperature measurement device and compare it to r4105[1].
Clean any dust or debris from cooling fans, filters, and heat sinks related to the TM120/TM150 module and the equipment on channel 1.
Examine the wiring and terminal connections of the temperature sensor for channel 1 at the TM120/TM150 module for proper seating and absence of damage.
Assess the current operational load and process settings to identify potential causes of overheating on the component monitored by channel 1.
If the physical temperature is normal but r4105[1] shows an elevated reading, proceed with replacing the temperature sensor on channel 1.
Adjust parameter p4102[3] (Fault threshold channel 1) to a higher, safe value if it is determined to be set too aggressively for normal operating conditions.