Craftsman 139.53625SR - Manual (Page 17)

Adjustment
STEP 1
Adjust UP and ÙOWN Limits
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LIMIT AEJJUSTMENT settings regulate the points at which
the door will stop when moving up or down.
NOTE: Door STOPS in the UP direction if anything
interferes with door travel. Door REVERSES In fhe
DOWN direction if anything interferes with the door
travel (including binding or unbalanced doors).
PROCEDURE: To operate opener, press wall push button
or transmitter. Run the opener through a COMPLETE
TRAVEL CYCLE . Limit adjustments are not necessary
when the door opens attd closes completely and doesn't
reverse unintentionally in the down position.
The following chart outlines adjustment procedures. Run the opener through a COMPLETE TRAVEL CYCLE AFTER
EACH ADJUSTMENT. NOTE: REPEATED OPERATION OF THE OPENER DURING ADJUSTMENT PROCEDURES MAY
CAUSE MOTOR TO OVERHEAT AND SHUT OFF. SIMPLY WAIT IS MINUTES AND TRY AGAIN. Read chart carefully
before proceeding to Step 2. Use a screwdriver to make limit adjustments.
Left Side Panel
Adjustment Label
LIMIT ADJUSTMENT CHAFTT
IF 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.
If door does not open at least 5 feel: adjust OPEN
FORCE as explained in Step 2,
IF DOOR DOES NOT CLOSE COMPLETELY
(ON SECTIONAL DOORS)
increase DOWN travel.Turn down limit adjustment screw
counterclockwise. One turn equ^s 2* of travel.
If the door still wilt not close completely, fhe header bracket
is positioned too high. Repeat Step 1, page 10.
IF DOOR DOES NOT CLOSE COMPLETELY
(ON ONE-PIECE DOORS)
Increase DOWN travel. Turn the down limit adjustment
screw counterclockwise. One turn equals 2" of travel,
IF DOOR REVERSES WHEN CLOSING AND THERE
IS NO INTERFERENCE TO TRAVEL CYCLE
Test door for binding: Pull emergency release handle.
Manually open and close door. If door is binding, call a
door serviceman, If door is not bindirvg or unbalanced,
adjust CLOSE FORCE, See Step 2.
IF OPENER REVERSES IN FULLY CLOSED POSITION
Decrease DOWN travel Turn down limit adjustment screw
clockwise. One turn equals 2" of travel.
STEP 2 Adjust Force
DO NOT USE FORCE ADJUSTMENTS TO COMPENSATE FOR A BINDING OR STICKING GARAGE DOOR,
EXCESSIVE FORCE WILL INTERFERE WITH PROPER OPERATION OF SAFETY REVERSE SYSTEM OR
DAMAGE GARAGE DOOR.
Force Adjustment Controls are located on rear panel of
opener. FORCE ADJUSTMENT settings regulate amount
of the power required to open and close door.
NOTE: The door STOPS In the UP dlrectiot» if attyfhing
Interferes with Its travel. Door REVERSES In the DOWN
direction if anything interferes with Its travel (ihciuding
binding or unbalanced doors).
If the force Etejusfments are set too light, door tra\rel may be
interrupted by nuisance reversals in DOWN direction and
stops in UP direction. As weather conditions can affect the
door movement, occasional adjustment may be needed.
Maximum force adjustment range is 260 degrees, about
3/4 of a complete turn. Do not force controls beyond that
point. Turn force adjustment controls with a screwdriver.
Back Panel
ol Opener
Fort»
Adjustment
^ Control
Adjustment Label
FORCE ADJUSTMENT CHART
TEST DOWN (CLOSE) FORCE
Grasp the door hmtils or door bottom when door is about
halfway through DOWN (CLOSE) TRAVEL. Door should
retterse. If the door Is hard to hold or doesn’t reverse,
decrease DOWN (CLOSE) FORCE by lurntng (he control
in
a counterclockwise direction. 10 degree turn
adjustments until door reverses normally. After each
adjustment, run opener through a complete cycle.
PROCEED TO STEP 3
IF DOOR DOESN’T OPEN AT LEAST 5 FEET
Increase UP (OPEN) FORCE by turning control clockwise.
Make 10 degree turn adjustments until door opens
completely. Readjust UP LIMIT if necessary. After each
adjustment, run opener through a complete travel cycle.
IF DOOR REVERSES DURING DOWN (CLOSE) CYCLE
Increase DOWN (CLOSE) FORCE by turning the control
clockwise. Make 10 degree turn adjustments until door
completes close cycle. After each adjustment, run the
opener through a complete travel cycle.
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