Chamberlain 3800P - Manual (Page 17)

17
To prevent damage to vehicles, be sure fully open door
provides adequate clearance.
BLACK
PURPLE
Push and hold
until the door
is at desired UP
position
Figure 2
Figure 3
Push either
button to stop
door at desired
DOWN position
BLACK
PURPLE
Figure 4
or
LOC
K
LIGH
T
Without a properly installed safety reversal system, persons
(particularly small children) could be SERIOUSLY INJURED or
KILLED by a closing garage door.
• NEVER learn forces or limits when door is binding or
sticking. Repair door first.
• 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"
high (3.8 cm) object (or 2x4 laid flat) on floor.
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.
To program the travel limits:
Adjust the position of the door by using the black and
purple buttons. Black moves the door UP (open) and
purple 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.
3. Push the remote control or door control (Figure 3). This
sets the UP (open) limit and begins closing the door.
NOTE: Excessive movement of the motor unit will cause
premature wear. See Troubleshooting section.
4. Immediately when the door begins to move down, press
and release either the black or purple button. This will
stop the door.
5. Setting the DOWN position: Push and hold the purple
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 a 1/16 of an inch). If there appears to be too
much pressure on the door, you may toggle the door
back and forth using the black and purple buttons to
reach the desired position.
7. Push the remote control or the 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.
Purple
Button
Indicator
Light
Black
Button
Figure 1