ADJUSTMENT STEP 1
Adjust the UP and DOWN lr_avel
Limits
Limitadjustmentsettingsregulatethe points at which
the door willstop when movingup or down.
To operate the opener, press the Door Controlpush
button. Runthe opener through a complete
travel cycle.
• Does the door open and close completely?
• Does the doer stay closed and not reverse
unintentionallywhen fully closed?
If yourdoor passes bothof these tests, no limit
adjustmentsare necessary unless the reversingtest
fails (sea Adjustment Step 3, page 30).
Adjustmentproceduresare outlinedbelow. Read the
procedures carefullybefore proceedingto
AdjustmentStep 2. Use a screwdriverto make limit
adjustments.Run the opener through a complete
travel cycle after each adjustment.
NOTE: Repeated operationof the opener dudng
adjustmentprocedures may cause the motor to
overheat and shutoff. Simplywa# 15 minutesand
tryagain.
NOTE: If anything interferes with the door'supward
travel,it willstop. ff anythinginterfereswith the
door'sdownward travel (includingbindingor
unbalanceddoors), it will reverse.
HOW AND WHEN TO ADJUST THE UMrFS
• If the door does not open completely but opens
at least five feet:
Increase up travel. Tum the UP limitadjustment
screwclockwise. One turn equals 3" of
trolleytravel.
NOTE: Toprevent the trolleyfromhitting the cover
protectionbolt, keep a minimumdistanceof 2-4"
between the trolleyand the bolt.
• If door does not open at least 5 feet:
Adjustthe UP (open) forceas explained in
AdjustmentStep 2.
• If the door does not close completely:
Increase downtravel. Turnthe down limit
adjustmentscrewcountemlockwise.One tum
equals3" of trolleytravel.
If door stillwon't close completely,try lengthening
the door arm (page 26) and decreasing the
downlimit.
• If the opener reverses in fully closed position:
Decrease down travel.Turn the down limit
adjustmentscrew clockwise,One turn equals 3"
oftrolley travel.
Withouta properlyinstalledsafetyreversalsystem,
persons(particularlysmallchildren)couldbe
SERIOUSLYINJUREDor KILLEDbya closinggarage
door.
• Incorrectadjustmentof garagedoortravellimitswill
interferewithproperoperationofsafetyreversal
system.
• If onecontrol(forceortravellimits)is adjusted,the
othercontrolmayalsoneedadjustment.
• AfterANYadjustmentsare made,the safetyreversal
systemMUSTbetested.DoorMUSTreverseon
contactwithone-inchhighobject(or 2x4laidflat)on
floor.
Topreventdamagetovehicles,besurefullyopendoor
providesadequateclearance.
Im
Covet
PIO_eC_O_
Bolt
• If the door reverses when closing and there is
no visible interference to travel cycle:
If the opener lightsare flashing, the Safety
Reversing Sensorsare either not installed,
misaligned,or obstructed.See Troubleshooting,
page 23.
Testthe door for binding:Pullthe emergency
release handle. Manually open and closethe door.
Ifthe dooris binding,cell a trained doer systems
technician. If the door isnot bindingor unbalanced,
adjustthe DOWN (close) force. See Adjustment
Step 2,
28
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