ADJUSTMENT STEP 1Adjust the UP and DOWN TravelLimits
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 operation of the opener during
adjustment procedures may cause the motor to
overheat and shut off. Simply wait 15 minutes and
try again.
NOTE: If anything interferes with thedoor'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 reversalsystem,
persons (particularly small children) could be
SERIOUSLYINJUREDorKILLEDby a closinggarage
door.
• Incorrect adjustment of garage door travellimits will
interferewith properoperation of safety reversal
system.
• If one control (force or travellimits) isadjusted, the
othercontrol mayalso need adjustment.
• After ANYadjustments aremade,the safety reversal
systemMUST be tested. Door MUST reverseon
contactwith one-inchhigh object (or2x4 laid flat) on
floor.
Toprevent damage to vehicles, be sure fully opendoor
providesadequate clearance.
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 limit adjustment
screw clockwise. One turn equals 2" of travel.
NOTE: To prevent 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:
Increase down travel. Turn the down limit
adjustment screw counterclockwise. One turn
equals 2" of travel.
If door still won't close completely, try lengthening
the door arm (page 26) and decreasing the down
limit.
•If the opener reverses in fully closed position:
Decrease down travel. Turn the down limit
adjustment screw clockwise. One turn equals 2"
of travel.
Cover
Protection
Boit
Limit Adjustment
Screws
Adjustment Label
If the door reverses when closing and there is
no visible interference to travel cycle:
If the opener lights are flashing, the Safety
Reversing Sensors are either not installed,
misaligned, or obstructed. See Troubleshooting,
page 23.
Test the door for binding: Pull the 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 binding or unbalanced,
adjust the DOWN (close) force. See Adjustment
Step 2.
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