Temperature sensor board 1 fault

What does F56 mean?

The temperature protection function for sensor board 1 has detected an issue, which could be an exceeded temperature limit, an unwired or non-functional sensor, or a short circuit in the sensor wiring (A1-A3 conditions). This compromises temperature monitoring.

• Actual temperature measured by the sensor connected to board 1 (e.g., motor winding) has exceeded its programmed trip limit (e.g., P3-10).
• Open circuit in the wiring connecting the temperature sensor (e.g., Pt100, NTC) to sensor board 1, indicating a broken wire.
• Short circuit in the temperature sensor wiring to sensor board 1, resulting in an invalid low resistance reading.
• Failure of the temperature sensor itself (e.g., internal break, resistance drift) providing incorrect feedback.
• Defective temperature sensor board 1, preventing accurate temperature measurement or communication.

Click steps to track your progress.

1. 1

   Measure the resistance of the temperature sensor connected to sensor board 1 (e.g., terminals T1, T2) and compare it to its specification (e.g., 100 Ohm for Pt100 at 0°C).

2. 2

   Inspect the wiring from the temperature sensor to sensor board 1 for any cuts, breaks, or loose connections at the terminal block.

3. 3

   Verify the actual temperature of the monitored component (e.g., motor frame) using an external infrared thermometer.

4. 4

   Review parameter P3-10 (Temperature Sensor 1 Trip Limit) to ensure it is set appropriately for the application and sensor type.

5. 5

   Temporarily disconnect the sensor wiring from sensor board 1 and connect a precision resistor (e.g., 100 Ohm) to simulate a healthy sensor, then observe the fault status.