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ADJUSTMENT STEP 1
Adjust the UP and DOWN Travel
Limits
Limit adjustment settings regulate the points at which
the door will stop when moving up or down.
Tooperate the opener, press the Door Control push
button. Run the opener through a complete travel
cycle.
• Does the door open and close completely?
• Does the door stay closed and not reverse
unintentionally when fully closed?
If your door passes both of these tests, no limit
adjustments are necessary unless the reversing test
fails (see Adjustment Step 3, page 30).
Adjustment procedures are outlined below. Read the
procedures carefully before proceeding to
Adjustment Step 2. Use a screwdriver to make limit
adjustments, Run the opener through a complete
travel cycle after each adjustment.
NOTE: Repeated operationof the opener during
adjustment procedures may cause the motorto
overheat and shutoff. Simply wait 15 minutesand
try again.
NOTE: If anything interferes with the door's upward
travel, it will stop. ff anything interferes with the
door's downward travel (including binding or
unbalanced doors), it will reverse.
HOW AND WHEN TO ADJUST THE LIMITS
• If the door does not open completely but opens
at least five feet:
Increase up travel. Turn the UP limitadjustment
screw clockwise. One turn equals 2" of travel.
NOTE: Toprevent the trolley from hitting the cover
protection bolt, keep a minimum distance of 2-4"
between the trolley and the bolt.
• If door does not open at least 5 feet:
Adjust the UP (open) force as explained in
Adjustment Step 2.
• If the door does not close completely:
Increasedown travel. Turn the down limit
adjustment screw counterclockwise. One turn
equals 2" of travel.
If door still won't close completely and the trolley
bumps into the trolley stop bolt (see page 4 or 5),
try lengthening the door arm (page 26) and
decreasing the down limit.
• If the opener reverses in fully closed position:
Decrease downtravel. Turn the down limit
adjustmentscrew clockwise.One turn equals 2"
of travel.
Withouta properlyinstalledsafetyreversalsystem,
persons(particularlysmall children)couldbe
SERIOUSLYINJUREDorKILLEDbya closing garage
door.
• Incorrectadjustmentof garagedoortravellimitswill
interferewith properoperationof safetyreversal
system.
• If one control (forceor travellimits) isadjusted,the
othercontrolmayalsoneedadjustment.
• After anyadjustmentsaremade,thesafetyreversal
systemMUSThetested.DoorMUSTreverseon
contactwith one-inchhigh object (or 2x4 laidflat) on
floor.
To preventdamagetovehicles,besurefullyopendoor
i
,] providesadequateclearance.
Limit
Adjustment
Screws
ooo7;
_J
Cover Left Side Panel
Protection
Bolt
Adjustment Label
If the door reverses when closing and there is
no visible interference to travel cycle:
Ifthe opener lightsare flashing,the Safety
ReversingSensors are either not installed,
misaligned,or obstructed.See Troubleshooting,
page 23.
Test the door for binding:Pullthe emergency
release handle. Manually open and close the door.
If the door is binding, call a trained door systems
technician. If the door is not bindLegor unbalanced,
adjust the DOWN (close) force. See Adjustment
Step 2.
28
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