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Chamberlain AccessMaster M885 - Test the Safety Reversal System

Chamberlain AccessMaster M885
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21
Adjustments
1 Program the Travel
Withouta properly installed safetyreversal system, persons (particularly small children) could be
SERIOUSLY INJUREDor KILLED by a closing garage door.
l
Incorrect adjustment ofgarage door travel limits will interfere with proper operation of
safetyreversal system.
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After ANY adjustments are made, the safetyreversal system MUST be tested.Door MUST
reverse on contact with 1-1/2" (3.8 cm) high object (or 2x4 laid flat) on floor.
While programming, the UP and DOWN buttons can be used to move the door as needed.
1. Press and hold the Adjustment Button until the UP Button begins to flash and/or a beep is
heard.
2. Press and hold the UP Button until the door is in the desired UP position.
3. Once the door is in the desired UP position press and release the Adjustment Button.The
garage door opener lights will flash twice and the DOWN Button will begin to flash.
4. Press and hold the DOWNButton until the door is in the desired DOWN position.
5. Once the door is in the desired DOWN position press and release the AdjustmentButton.The
garage door opener lights will flash twice and the UP Button will begin to flash.
6. Press and release the UP Button.When the door travelsto the programmed UP position,the
DOWN Button will begin to flash.
7. Press and release the DOWNButton. The door will travel to the programmed DOWNposition.
Programming is complete.
If the garage door opener lightsare flashing 5 times during the steps for Programthe Travel,the
programming hastimed out. If the garage door opener lights are flashing 10 times during the steps for
Program the Travel,the safetyreversing sensors are misaligned or obstructed (refer to page 19).When
the sensors are aligned and unobstructed, cycle the door through a complete up and down cycle using
the remote control or the UP and DOWNbuttons.Programming is complete.Ifyou are unable to operate
the door up and down, repeat the steps for Programming the Travel.
PROGRAMMING BUTTONS
UP Button
Adjustment Button
DOWN Button
1 2
3
4 5
6 7

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