Chamberlain C2405C Istallation Manual page 32

Adjustments
1
Program the Travel
WARNING
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 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. 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.
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.
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
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 to open and close. The garage door opener will sound an audible
and visual alert before automatically oepening 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.
32