Linear LDCO 841, Homeowner'S Manual, Page: 7 / 16

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AUTOMATIC DOOR FORCE SETUP
(normally not used)
SAFETY REVERSAL SYSTEM TEST
The opener automatically measures the door force throughout the entire travel of the door each time the
opener cycles. The opener will automatically adjust to changing door hardware conditions over time due to
weather and wear. Your installer has used these steps during setup of the opener. You can also perform these
steps at any time.
Automatic Door Force Setup
1 Be sure that the trolley latch is up and the door is
connected to the opener.
2 Operate the door through four (4) complete open
and close cycles.
The opener determines that there is an obstruction if
a higher than expected amount of force is detected
during a door cycle. If an obstruction is encountered
during a closing cycle, the opener and door will stop
then fully open. If an obstruction is encountered
during an opening cycle, the opener and door will
stop.
Safety Reversal System Test
1 Lay a 2 x 4 board flat on the floor where it will be
struck by the center of the door as it closes.
2 Verify that the door reverses when it strikes the
board. The door must reverse within two seconds
after striking the board.
The door must reverse
within 2 seconds after
impact with 2x4 board.
2x4 board laid flat under the center of the door.
TEST FOR SAFETY REVERSAL SYSTEM
OPERATE THE DOOR THROUGH
FOUR FULL OPEN AND CLOSE CYCLES
DOOR FORCE SETUP
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