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ADJUSTMENT STEP 3
Test the Safety Reversal System
Garage Door Installation
TEST
• With the door fully open, place a 38 mm obstacle on the
floor, centered under the garage door.
• Operate the door in the down direction. The door must
reverse on striking the obstruction. Upon successful safety
reversal test proceed to Adjustment Step 4.
ADJUST
• If the door stops on the obstruction, it is not traveling far
enough in the down direction. Complete Adjustment Step 1
and 2 Programming the Limits and Forces.
NOTE:
On a sectional door, make sure limit adjustments
do not force the door arm beyond a straight up and down
position. See Figure 3 on page 27.
• Repeat the test.
• When the door reverses on the 38 mm obstacle, remove
the obstruction and run the opener through 3 or 4 complete
travel cycles to test adjustment.
• If the unit continues to fail the Safety Reverse Test, call for
a trained door systems technician.
IMPORTANT SAFETY CHECK:
Test the Safety Reverse System after:
• Each adjustment of door arm length, limits, or force
controls.
• Any repair to or adjustment of the garage door (including
springs and hardware).
• Any repair to or buckling of the garage floor.
• Any repair to or adjustment of the opener.
Gate Installation
TEST
The opener must reverse if the gate comes in contact with an
obstruction. A closing gate should reverse with little effort,
and open completely. See Adjustment Step 2.
• Use 38 mm board laid flat against the wall or gate edge.
• SLIDING GATE DOOR, place a 38 mm board between the
door and wall of a closing gate. Gate must reverse on the
board and open completely. Repeat at opposite wall if two
openers are installed.
• SWING OUT GATE, insert a 38 mm board between the
closing gate sections. Gate sections must reverse and
swing open completely.
ADJUST
• If the gate stops on the obstruction, it is not traveling far
enough in the closing direction. See Adjustment Step 1
Program the Travel Limits. Repeat Test.
• When the gate reverses on a 38 mm board, remove the
obstruction and run the opener through complete travel
cycle to test adjustment.
If the gate will not reverse after repeated adjustment
attempts, call for professional gate service.
ONE-PIECE DOOR
SECTIONAL DOOR
38 mm Obstacle
38 mm Obstacle
38 mm Obstacle
SWINGING GATE
SLIDING GATE
38 mm
Obstacle
Without a properly installed safety reversal system, persons
(particularly small children) could be SERIOUSLY INJURED or
KILLED by a closing garage door.
• Incorrect adjustment of garage door travel limits will interfere
with proper operation of safety reversal system.
• NEVER use force adjustments to compensate for a binding or
sticking garage door.
• If one control (force or travel limits) is adjusted, the other
control may also need adjustment.
• After ANY adjustments are made, the safety reversal system
MUST be tested. Door MUST reverse on contact with a
38 mm obstacle on the floor.
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