When the ultrasonic noise is received, the bass toned buzzer sound continuously. When the ultrasonic noise stops, the normal operation will be resumed immediately.
When the abnormality such as the open circuit of a sensor occurs, the sensor turns OFF and the high toned buzzer sounds for 5 seconds. When the normal signal is received, the normal state will be resumed.
When an abnormality occurs in the sensor, the reversing sensor indicator keeps flashing with 0.8-second interval until the system returns to the normal condition. However, if the system is turned OFF by using the switch, the indicator stops its flashing.