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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.
To operate the opener, press the Door Control push bar.
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
(Adjustment Step 3, page 29).
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. 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 garagedoor.
• Incorrect adjustment of garage door travel limits will
interfere with proper operation of safety reversalsystem.
• If one control (force or travel limits) is adjusted,the other
control may also needadjustment.
• AfterANYadjustments are made,the safety reversalsystem
MUSTbe tested. Door MUSTreverse on contact with 1-1/2"
high (3.8 cm) object (or 2x4 laid flat) on floor.
Toprevent damageto vehicles, be surefully open door
provides adequateclearance.
Cover Protection Bolt
U
HOW AND WHEN TO ADJUST THE LIMITS
• If the door does not open completely but opens at
least five feet (1.5 m):
Increase up travel. Turn the UP limit adjustment screw
clockwise. One turn equals 2" (5 cm) of travel.
NOTE: Toprevent the trolley from hitting the cover
protection bolt, keep a minimum distance of 2-4"
(5 cm - 10 cm) between the trolley and the boll
• If door does not open at least 5 feet (1.5 m):
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" (5 cm) of
travel. •
If door still won't close completely and the trolley bumps
into the pulley bracket (page 4), try lengthening the door
arm (page 25) 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" (5 cm) of travel.
Left Side Panel
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 22.
Test the door for binding: Pull the emergency release
handle. Manually open and close the door. If the door is
binding or unbalanced, call for a trained door systems
technician. If the door is balanced and not binding,
adjust the DOWN (close) force. See Adjustment Step 2.
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