Chamberlain Merlin MJ3800R Installation And Operating Instructions Manual page 14

ADJUSTMENT STEP 1
PROGRAM THE TRAVEL LIMITS
Travel limits regulate the points at which the door will
stop when moving up or down. Follow the steps below
Figure 1
to set the limits.
Indicator
Light
Orange
Button
(down)
To program the travel limits:
Adjust the position of the door by using the black and
orange buttons. Black moves the door UP (open) and
orange moves the door DOWN (close).
1. Setting the UP position: Press and hold the black
button until the yellow indicator light starts flashing
slowly then release.
2. Push and hold the black button until the door reaches
the desired UP (open) position (Figure 2).
NOTE: Check to be sure the door opens high enough
for your vehicle to pass under.
3. Push the transmitter, wireless wall button or multi-
function door control (Figure 3). This sets the UP (open)
limit and begins closing the door.
NOTE: Excessive movement of the opener will cause
premature wear. See Troubleshooting section.
4. Immediately when the door begins to move down, press
and release either the black or orange button. This will
stop the door.
5. Setting the DOWN position: Push and hold the orange
button until the door reaches the desired DOWN
(closed) position (Figure 4).
6. Once the door is closed, check for proper pressure on
the door (you should be able to manually push the door
down 2mm). If there appears to be too much pressure
on the door, you may toggle the door back and forth
using the black and orange buttons to reach the desired
position.
7. Push the transmitter, wireless wall button or the multi-
function door control (Figure 3). This sets the DOWN
(close) limit and should bring the door to the open
position.
• If the opener is not stopping exactly where you would
like it, repeat steps 1 through 7 and program the limits
again.
• When the unit stops in both the desired up (open) and
down (close) positions, proceed to Adjustment Step 2,
Setting the Force.
Black
Button
(up)
Without a properly installed safety reversal system,
persons (particularly children) could be SERIOUSLY
INJURED or KILLED by a closing door.
• NEVER learn forces or limits when door is binding or
sticking. Repair door first.
• Incorrect adjustment of the 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 40mm high (1 1/2") object on floor.
To prevent damage to vehicles, be sure fully open door
provides adequate clearance.
Figure 2
Figure 2
Push and hold
until the door
is at desired UP
position then
release
Figure 3
Figure 4
Figure 4
BLACK
ORANGE
14
BLACK
ORANGE
or
or
Press to stop
door at desired
DOWN position