F35209

TM120/TM150 Temperature Fault Channel 2

Siemens · SINAMICS S120/S150 Reference List

What does F35209 mean?

This fault is triggered when the actual temperature (r4105[2]) for channel 2 on the Terminal Module 120 (TM120) or Terminal Module 150 (TM150) exceeds its configured fault threshold (p4102[5]), or if an associated timer (p4103[2]) 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.

Common Causes

  • High thermal stress due to continuous heavy load on the equipment monitored by channel 2, leading to sustained elevated temperatures.
  • Suboptimal environmental conditions, such as high cabinet temperature, reducing the heat dissipation capability of the TM120/TM150 or monitored device.
  • Failed temperature sensor attached to channel 2, resulting in an incorrect, high value for r4105[2].
  • Obstruction of ventilation pathways or failure of the dedicated cooling system for the component monitored by channel 2.
  • Fault threshold parameter p4102[5] (Temperature fault threshold channel 2) set with insufficient margin above the component's typical operating temperature.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Verify the actual temperature of the component monitored by channel 2 using a calibrated thermal imager or thermocouple, cross-referencing with r4105[2].

  2. 2

    Check and ensure proper airflow by cleaning any blocked vents or filters on the TM120/TM150 module and the associated equipment for channel 2.

  3. 3

    Perform a continuity check and visual inspection on the temperature sensor cabling for channel 2 to identify any breaks or poor connections.

  4. 4

    Evaluate the operational cycle and load profile of the equipment on channel 2 to ascertain if it is being overstressed.

  5. 5

    If the component's physical temperature is normal but r4105[2] is elevated, replace the temperature sensor connected to channel 2.

  6. 6

    Consider increasing parameter p4102[5] (Fault threshold channel 2) if system analysis confirms the current setting is too low for the component's safe, sustained operation.

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Verified technical data. Last updated: March 2026

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Source: Siemens SINAMICS S120/S150 Reference List