28
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
1. Test the DOWN (close) force
• 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 29.
If the door is hard to hold or does
not 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 are not 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.
2.
Test the UP (open) force
• 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 does
not 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 does not 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.
Force
Adj
u
stment
Controls
Back Panel
FORCE ADJUSTME
N
T LABEL
KG
KG
1
3
9
7
5
1
3
9
7
5
KG
KG
Antenna
Open Force
Close Force
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" high (3.8 cm) object (or 2x4 laid
flat) on floor.
WARNING
CAUTION
WARNING
WARNING
