Chamberlain 85870 Manual page 26

Adjustments
1 - Program the Travel
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.
• After ANY adjustments are made, the safety reversal system MUST be tested. Door
MUST reverse on contact with 1-1/2" (3.8 cm) high object (or 2x4 laid flat) on floor.
Note: While programming the travel, the UP and DOWN buttons can be used to move the door as
needed. During the Automatic Force Setup, the door will automatically open and close.
1 Press and hold the
Adjustment Button until
the UP Button begins to
flash and/or a beep is
heard. The Safety
Reversing Sensors will
be disconnected during the Program the Travel
process.
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.
5 Once the door is in the
desired DOWN position
press and release the
Adjustment Button. The
garage door opener lights
will flash twice. Program
the Travel is now complete. If the garage door
opener lights flash 5 times, then programming
has timed out and the Travel Limits have not
been set. Please restart the Program the Travel
process.
2 Press and
hold the UP
Button until
the door is in
the desired
UP position.
4 Press and
hold the
DOWN button
until the door
is in the
desired DOWN position.
2 - Automatic Force Set Up
Once both the up and down positions have been manually set, the Safety Reversing Sensors will
reconnect and become operational. Then, the opener will enter a force-sensing operation by
automatically moving the door open and close. The garage door opener will sound an audible and
visual alert before automatically opening and closing the door. The garage door opener will beep
three times, confirming that the Automatic Force Setup completed successfully. Adjustment is
complete.
If you hear one long beep after the door attempts to move, then the Automatic Force Set Up has not
completed successfully. Please start over at step 1 of Program the Travel.
NOTE: If the travel/force setup process is not completed successfully any attempt to activate the
opener from a remote/keyless entry or wall control will not work and the opener will flash the work
lights 2 times.
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