Fault 1: Probe fails to communicate or shows no measurement reading Incorrect connection between the controller and cable; cable failure; the fluorescent cap is not tightened properly or is damaged.

Fault 2: Measured value is excessively high/low, or the reading remains unstable Foreign substances adhering to the outer surface of the fluorescent cap; damaged fluorescent cap; expired service life of the fluorescent cap; internal hardware failure of the probe.

Fault 3: Temperature reading exceeds the measurable range or garbled codes appear Incorrect connection between the controller and cable; failure of the temperature sensor or the probe.