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Chamberlain 4000E Manual

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Adjustment Step 1
Adjust UP and DOWN Limits
LIMIT ADJUSTMENT 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 the DOWN direction if anything
interferes with the door travel (including binding
or unbalanced doors).
PROCEDURE: To operate the opener, press the
Door Control Button or transmitter. Run the opener
through a COMPLETE TRAVEL CYCLE. No limit
adjustments are necessary when the door opens
and closes completely and doesn’t reverse
unintentionally when fully closed.
The following chart outlines adjustments procedures. RUN THE OPENER THROUGH A COMPLETE TRAVEL
CYCLE AFTER AFTER EACH ADJUSTMENT.
NOTE: REPEATED OPERATION OF THE OPENER DURING ADJUSTMENT PROCEDURES MAY CAUSE
MOTOR TO OVERHEAT AND SHUT OFF. SIMPLY WAIT 15 MINUTES AND TRY AGAIN.
Read the chart carefully before proceeding to Step 2. Use a screwdriver to make limit adjustments.
IF DOOR DOES NOT OPEN COMPLETELY
BUT OPENS AT LEAST 1.5M
Increase UP travel. Turn the UP LIMIT adjustment
screw clockwise. One turn equals 5cm of travel.
If door does not open at least 1.5m: Adjust UP
(OPEN) FORCE as explained in step 2.
IF DOOR DOES NOT CLOSE COMPLETELY
Increase DOWN travel. Turn down limit adjustment
screw counterclockwise. One turn equals 5cm of
travel.
If the door still will not close completely, the header
bracket is positioned too high. See Step 1, page 10.
IF OPENER REVERSES
IN FULLY CLOSED POSITION
Decrease DOWN travel. Turn down limit adjustment
screw clockwise. One turn equals 5cm of travel.
IF DOOR REVERSES WHEN CLOSING AND
THERE IS NO INTERFERENCE TO TRAVEL CYCLE
Test door for binding: Pull manual release
handle. Manually open and close door. If door is
binding, call for garage door service. If door is not
binding or unbalanced, adjust DOWN (CLOSE)
FORCE. See Step 2.
20
LIMIT ADJUSTMENT CHART
Left Side
Panel
Limit Adjustment
Screws
Adjustment Label
INCREASE TRAVEL
DOWN UP
INCREASE TRAVEL
DOWN
UP
… 20 …


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