TERRY Harmony Series 2 Homelift Instructions Manual page 6

Proceed with caution when exiting the carriage backwards
The diagram below (Fig.1) shows the position of all the sensors
on the lift, designed to prevent injury or damage if the movement
of the carriage is obstructed.
Harmony lift shown part-way
through aperture
Infil panel safe edge
(sensors on upper
and lower surfaces)
Safe edges
Underpan safe edge
(sensor on lower and
upper surface)
7
Door safe edge
Fig. 1