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ADJUSTMENT STEP 2
Adjustthe Force
Forceadjustment controls are located on the right panelof the
motor unit. Forceadjustment settings regulatethe amount of
power required to open and close the door.
If the forces areset 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 maximumforce adjustmentrange is about3/4 of a
completeturn. Do not forcecontrolsbeyondthat 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.
Without a properly installed safety reversal system, persons
(particularly small children) could be SERIOUSLYINJUREDor
KILLEDby a closing garage door.
• Too much force on garagedoor will interfere with proper
operation of safety reversalsystem.
• NEVERincrease force beyond minimum amount required to
close garage door.
• NEVERuse force adjustments to compensatefor a binding or
sticking garagedoor.
• If one control (force or travel limits) is adjusted, the other
control may also needadjustment.
• 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.
HOWAND WHENTO ADJUSTTHE 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. SeeAdjustment
Step 3, page 29. If the dooris hardto holdor doesn't
reverse, DECREASEthe DOWN(close) force by turning
the control counterclockwise. Make small adjustments until
the door reverses normally. After each adjustment, run the
openerthrough a complete cycle.
• If the door reversesduringthe down(close) cycleandthe
openerlights aren't flashing, INCREASEDOWN(close) force
by turning the control clockwise.Make small adjustments until
the door completes a close cycle.After each adjustment, run
the openerthrough a complete travel cycle. Do not increase
the force beyond the minimum amount required to close the
door.
2. Testthe 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
hardto hold or doesn't stop, DECREASEUP (open) force by
turning the control counterclockwise.Makesmall 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 openat least 5 feet (1.5 m),
INCREASEUP (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 openerthrough a complete travel cycle.
Force Adjustment
Controls
Right Panel
° °
@"_ Antenna
ADJUSTMENT LABEL
Open Force Close Force
28
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