Chamberlain PD220 - Test the Safety Reversal System; Test the Protector System

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Adjustments
STEP 2 Test the Safety Reversal System
Withouta properly installed safetyreversal system,persons (particularly small children) could be
SERIOUSLY INJURED or KILLED by a closing garage door.
l Safety reversal system MUSTbe tested every month.
l After ANY adjustments are made, the safety reversal system MUST be tested. Door MUST reverse
on contactwith 1-1/2" (3.8 cm) high object(or 2x4 laid flat) on the floor.
1. With the door fully open, place a 1-1/2 inch (3.8 cm) board (or a 2x4 laid flat) on the floor,
centered under the garage door.
2. Operate the door in the down direction. The door MUSTreverse on striking the obstruction.
If the door stopsand does notreverse on the obstruction, the down travel needs to be increased (refer to
Adjustment Step 1).Repeat the test.When the door reversesupon contact with the 1-1/2 inch board,
remove the board and open/close the door 3 or 4 timesto test the adjustment. Ifthe garage door opener
continues to fail the safetyreversal test,call a trained door systemstechnician.
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STEP 3 Test the Protector System
®
Withouta properly installed safetyreversing sensor,persons (particularly small children) could be
SERIOUSLY INJURED or KILLED by a closing garage door.
1. Pressthe remote control push button to open the door.
2. Place the opener carton in the path of the door.
3. Pressthe remote control push button to close the door. The door will notmove more than an inch
(2.5cm), and the opener lights will flash.
The garage door opener will not close from a remote control if the LED in either safetyreversing sensor
is off (alerting you to the fact that the sensor is misaligned or obstructed).If the garage door opener
closes the door when the safetyreversing sensor is obstructed (and the sensors are no more than
6inches [15cm] above the floor), call for a trained door systemstechnician.
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