11

Motor thermistor overtemperature

Danfoss · VLT HVAC Basic FC 101

What does 11 mean?

The motor's thermistor temperature sensor or its connection is faulty or disconnected. This means the drive cannot accurately monitor the motor's temperature, risking undetected overheating. An unresolved thermistor fault could lead to severe motor damage due to thermal stress if the motor is indeed overheating.

Additional Steps

Steps 1–2 are listed in Priority Fix.

  1. 3

    Ensure that parameter 1-93 Thermistor Source is correctly configured to match the type of thermal sensor (e.g., PTC, NTC, thermal switch) installed.

  2. 4

    If the thermistor or wiring is confirmed faulty, replace the thermistor or repair the wiring as necessary.

Source: Danfoss VLT HVAC Basic FC 101
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