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What is error t1CF on the Altivar Process 900?

Published date: 27 March 2019

What is Thermal Sensor Error (t1CF) on the Altivar Process 900?

Product Line:
Variable Frequency Drives

Applies to Altivar Process 900

Drive displaying "t1CF" when wiring the sensor to "AI1" and "COM"


t1CF: AI1 thermal sensor Error

Probable Cause:
The thermal sensor monitoring function has detected a thermal sensor error on analog input AI1:
  • Open circuit, or
  • Short circuit

Remedy: Verify the sensor and its wiring, replace the sensor if needed

This detected error can be cleared with [Auto Fault Reset] Atr or manually with the [Fault Reset Assign] rSF parameter after the cause has disappeared.


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