21
ADJUSTMENT STEP 2
Adjust the Force
Force adjustment controls are located on the back panel of the
motor unit. Force adjustment settings regulate the amount of
power required to open and close the door.
If the forces are set too light, door travel may be interrupted by
nuisance reversals in the down direction and stops in the up
direction. Weather conditions can affect the door movement, so
occasional adjustment may be needed.
The maximum force adjustment range is about 3/4 of a
complete turn. Do not force controls beyond that point.
Turn
force adjustment controls with a screwdriver.
NOTE:
If anything interferes with the door’s upward travel, it will
stop. If anything interferes with the door’s downward travel
(including binding or unbalanced doors), it will reverse.
HOW AND WHEN TO ADJUST THE FORCES
Test the DOWN (close) force
1.
Grasp the door bottom when the door is about halfway through
•
DOWN (close) travel. The door should reverse.
Reversal
halfway through down travel does not guarantee reversal on a
1-1/2" (3.8 cm) obstruction. See Adjustment Step 3, page 22.
If the door is hard to hold or doesn’t reverse,
DECREASE the
DOWN (close) force by turning the control counterclockwise.
Make small adjustments until the door reverses normally. After
each adjustment, run the opener through a complete cycle.
If the door reverses during the down (close) cycle and the
•
opener lights aren’t flashing,
INCREASE DOWN (close) force
by turning the control clockwise. Make small adjustments until
the door completes a close cycle. After each adjustment, run
the opener through a complete travel cycle.
Do not increase the
force beyond the minimum amount required to close the door.
Test the UP (open) force
2.
Grasp the door bottom when the door is about halfway through
•
UP (open) travel. The door should stop.
If the door is hard to
hold or doesn’t stop,
DECREASE UP (open) force by turning
the control counterclockwise. Make small adjustments until the
door stops easily and opens fully. After each adjustment, run
the opener through a complete travel cycle.
If the door doesn’t open at least 5 feet (1.5 m),
•
INCREASE
UP (open) force by turning the control clockwise. Make small
adjustments until door opens completely. Readjust the UP limit
if necessary. After each adjustment, run the opener through a
complete travel cycle.
KG
KG
1
3
9
7
5
1
3
9
7
5
Adjustment Label
Force Adjustment
Controls
Back Panel of Opener
KG
KG
1
3
9
7
5
1
3
9
7
5
2
3
1
Without a properly installed safety reversal system, persons
(particularly small children) could be SERIOUSLY INJURED or
KILLED by a closing garage door.
Too much force on garage door will interfere with proper
•
operation of safety reversal system.
NEVER increase force beyond minimum amount required to
•
close garage door.
NEVER use force adjustments to compensate for a binding or
•
sticking garage door.
If one control (force or travel limits) is adjusted, the other
•
control may also need adjustment.
After ANY adjustments are made, the safety reversal system
•
MUST be tested. Door MUST reverse on contact with 1-1/2"
(3.8 cm) high object (or 2x4 laid flat) on floor.
