Siemens · SINAMICS G120C Variable Speed Drive
An error has been detected in the evaluation of the motor temperature sensor configured in p0601. This could be due to a wire breakage, the sensor being disconnected (e.g., KTY resistance > 2120 Ohm), or the measured resistance being too low (e.g., PTC resistance < 20 Ohm, KTY resistance < 50 Ohm). The fault causes an OFF1 reaction and prevents proper motor temperature monitoring, risking motor damage from overheating if not resolved.
Click steps to track your progress.
Disconnect motor temperature sensor wires from the drive terminals (e.g., X12.1/X12.2) and measure resistance across them using a multimeter.
Verify the sensor type selected in parameter P0601 matches the installed motor temperature sensor (e.g., KTY84, PT1000).
Inspect the sensor cabling for physical damage, shorts to ground, or breaks from the motor terminal box to the drive's input.
Check all terminal connections for tightness at both the motor terminal box and the drive's sensor input terminals (e.g., X12).
Measure voltage on the sensor input terminals (e.g., X12) using an oscilloscope to detect possible noise or interference.