Sears 139.53975SRT1 Manuel du propriétaire télécharger pdf (Page 30)

ADJUSTMENT STEP 3

Test the Safety Reversal System

TEST

• With the door fully open, place a one-inch board

(or a 2x4 laid flat) on the floor, centered under the

garage door.

• Operate the door in the down direction. The door

must reverse on striking the obstruction.

ADJUST

• If the door stops on the obstruction, it is not

traveling far enough in the down direction.

Increase the DOWN limit by turning the DOWN

limit adjustment screw counterclockwise 1/4 turn.

NOTE: On a sectional door, make sure limit

adjustments do not cause the trolley to move

within 2-1/2" of the trolley stop bolt. If necessary

lengthen straight door arm to maintain this

minimum distance.

• Repeat the test.

• When the door reverses on the one-inch board,

remove the obstruction and run the opener through

3 or 4 complete travel cycles to test adjustment.

IMPORTANT SAFETY CHECK:

Repeat Adjustment Steps 1, 2 and 3 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.

Without a properly installed safety reversalsystem,

persons (particularly small children) could be

SERIOUSLYINJUREDor KILLEDby a closing garage

door.

• Safety reversal system MUST be tested every month.

• If one control (force or travel limits) is adjusted, the

other control may als0 needadjustment.

• After ANY adjustments are made,the safety reversal

system MUST be tested. Door MUST reverseon

contact with one-inch high object (or 2x4 laid flat) on

the floor.

ADJUSTMENT STEP 4

Test the Safety Reversing Sensor

• Press the remote control push button to open the

door.

• Place the opener carton in the path of the door.

• Press the remote control push button to close the

door. The door will not move more than an inch,

and the opener lights will flash.

The garage door opener will not close from a remote

if the indicator light in either sensor is off (alerting

you to the fact that the sensor is misaligned or

obstructed).

If the opener closes the door when the safety

reversing sensor is obstructed (and the sensors

are no more than 6" above the floor), call for a

trained door systems technician.

Without a properly installed safety reversingsensor,

persons (particularly small children) could be

SERIOUSLYINJUREDor KILLEDby a closing garage

door.

Safety Reversing Sensor

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Sears 139.53975SRT1 Manuel du propriétaire Page 30

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