Merlin MJ3800 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
to set the limits.
Figure 1
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
Press to stop
door at desired
DOWN position