Cause : Excessive PID Feedback comes when PID feedback input is greater than the level set to b5-36 for longer than the time set to b5-37. Set b5-12 to 2 or 5 to enable fault detection.

1. Parameters are set inappropriately- check b5-36 and b5-37 settings.
2. Incorrect PID feedback wiring- correct the wiring.
3. There is a problem with the feedback sensor- check the sensor on the control side or replace the sensor if damaged.