The problem is that a sensor that detects the plate on the bridge behaves strangely. When I turn on ctp I get error E3313 Auto-loader error. Red light on sensor is OFF and It should be turned ON to detect the plates. When I take a piece of the plate and get underneath the sensor several times, red light on sensor turns ON and OFF and It stays ON when there is no plate under, and then error is gone. I tested sensor via ctp panel and it woks with no problem. Problem came again after restarting ctp.