The surfaces of the door opener must be
brushed down or wiped with a well-wrung
If the door starts to make abnormal,
squeaking or rattling noises, lubricate all
moving parts and, if necessary, tighten the
If you have switched the maintenance
signal on, the door opener will emit a sound
signal after approximately 2000 openings
to remind you that all moving parts must be
1) The chain runs in the rail, but the door
The brake on the rider has been
released. Engage the brake.
2) The door is not functioning normally,
and “H” is showing on the display.
The motor has been aff ected by damp.
Have the motor dried by an expert.
3) The door jerks or stops suddenly, and “F”
The door has encountered an obstacle.
Remove the obstacle, and let the door
run a full cycle (right up, right down,
right up) to get it back to normal
4) If “L” appears in the display, it means the
motor is encountering resistance. This
is not a fault, but you should reduce the
resistance to prevent the motor from
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