Emergency function

• E60, E61

Cyclical readjustment of the pivoted-out ball head can result in the ball head becoming mechanically jammed in this limit position.

In this event, the ball head can be freed from the limit stop by the emergency function.

A defined pivoting movement must be achieved in the run-up phase to pivoting the ball head out or in. This pivoting movement corresponds to a defined number of Hall-effect pulses by the DC motor. The Hall-effect pulses are picked up by a Hall-effect sensor on the DC motor.

If a defined number of Hall-effect pulses is not reached, the control unit activates the emergency function.

In the emergency function, the DC motor is energized five times cyclically (each cycle comprises energizing for 300 ms followed by a pause of 200 ms).

If the minimum number of Hall-effect pulses is not achieved, the ball head can then only be pivoted in or out by continuous operation of the button for the electrically pivoted trailer coupling.

The control unit for the electrically pivoted trailer coupling activates the emergency function in the following conditions:

• Briefly pressing (for less than 1 second) the button for the electrically pivoted trailer coupling (mode: fully automatic pivoting out or in)
• Trailer head is in the run-up phase to pivoting in or out
• Emergency function was not previously triggered
• Minimum number of Hall-effect pulses by the DC motor not achieved