Adjustment; Limits - Chamberlain LiftMaster LA412 Owner's Manual

ADJUSTMENT

» LIMITS

LIMITS

The limits are internal settings that indicate when the gates are in the fully open position and the fully closed position. For proper functionality, the limits must be programmed
during the installation process. The programming uses a combination of buttons on the control board.
The specific buttons used for programming depends on which side of the gate the control box is mounted and how many operators the installation includes. Refer to pages 10
and 11 to determine if the gate is Left-handed or Right-handed.
If a mistake is made during programming press the RESET button on the outside of the control box to start over. The programming times-out automatically after
60 seconds of inactivity.
1
Close the gate.
2
Engage the operator by turning the release lever clockwise 180°, then turning
the key clockwise 180°.
SINGLE ARM LEFT-HAND SIDE
PROGRAM OPEN
3
Press the LEARN LIMITS button (SET OPEN LIMIT LED will blink).
LEARN LIMITS button
R2
K2
U4
SET
OPEN
LIMIT
D4
D2
4
Press the Gate 1
DIAGNOSTIC
right button to
move gate to the
desired OPEN
position.
5
When gate is in the desired position, press
the LEARN LIMITS button again. Control
board will beep.
PROGRAM CLOSE
6
Press the Gate
1 left button to
move gate to
the desired
CLOSED position.
7
When gate is in the desired closed position,
press the LEARN LIMITS button again.
The control board beeps and the SET OPEN LIMIT and SET CLOSE LIMIT LEDs stop blinking, programming is now complete. (If the SET OPEN LIMIT LED continues to blink,
repeat programming. If the problem continues, see Troubleshooting section.)
Test the limits by pressing the SBC to open and close the gate.
RESET
BUTTON
GATE 1
SET
CLOSE
SET
OPEN
LIMIT
DIAGNOSTIC
GATE 1
SET
CLOSE
SET
OPEN
LIMIT
OR
PROGRAM OPEN
3
Press the LEARN LIMITS button (SET OPEN LIMIT LED will blink).
4
Press the Gate 1 left button to move gate to
the desired OPEN position.
5
When gate is in the desired position, press
SET
the LEARN LIMITS button again. Control
CLOSE
LIMIT
board will beep.
PROGRAM CLOSE
6
When the SET CLOSE LIMIT LED blinks, press
the Gate 1 right button.
7
When gate is in the desired closed position,
SET
press the LEARN LIMITS button.
CLOSE
LIMIT
29
SINGLE ARM RIGHT-HAND SIDE
LEARN LIMITS button
SET
OPEN EN
LIMIT
R2
R1
F3
K2
OFF
T
D9
Z3
Z4
U3
D4
D1
D2
RESET
BUTTON
DIAGNOSTIC
GATE 1
SET
CLOSE
SET
SET
CLOSE
OPEN
LIMIT
LIMIT
DIAGNOSTIC
GATE 1
SET
CLOSE
SET
SET
CLOSE
OPEN
LIMIT
LIMIT