Operation; Using Your Garage Door Opener - Chamberlain LiftMaster Professional Security+ 3245CM Owner's Manual

OPERATION

IMPORTANT SAFETY INSTRUCTIONS
To reduce the risk of SEVERE INJURY or DEATH:
1. READ AND FOLLOW ALL WARNINGS AND INSTRUCTIONS.
2. ALWAYS keep remote controls out of reach of children.
NEVER permit children to operate or play with garage door
control push buttons or remote controls.
3. ONLY activate garage door when it can be seen clearly, it is
properly adjusted, and there are no obstructions to door
travel.
4. ALWAYS keep garage door in sight until completely closed.
NO ONE SHOULD CROSS THE PATH OF THE MOVING
DOOR.
5. NO ONE SHOULD GO UNDER A STOPPED, PARTIALLY OPEN
DOOR.
6. If possible, use emergency release handle to disengage
trolley ONLY when garage door is CLOSED. Weak or broken
springs or unbalanced door could result in an open door
falling rapidly and/or unexpectedly.
7. NEVER use emergency release handle unless garage doorway
is clear of persons and obstructions.
8. NEVER use handle to pull garage door open or closed. If
rope knot becomes untied, you could fall.

Using Your Garage Door Opener

Your Security✚ opener and hand-held remote control
®
have been factory-set to a matching code which changes
with each use, randomly accessing over 100 billion new
codes. Your opener will operate with up to eight Security✚
remote controls and one Security✚
If you purchase a new remote, or if you wish to deactivate
any remote, follow the instructions in the Programming
section.
Activate your opener with any of the following:
• The hand-held Remote Control: Hold the large push
button down until the door starts to move.
• The wall-mounted Door Control: Hold the push button or
bar down until the door starts to move.
• The Keyless Entry (See Accessories): If provided with
your garage door opener, it must be programmed before
use. See Programming.
When the opener is activated (with the safety reversing
sensor correctly installed and aligned)
1. If open, the door will close. If closed, it will open.
2. If closing, the door will reverse.
3. If opening, the door will stop.
4. If the door has been stopped in a partially open position,
it will close.
5. If obstructed while closing, the door will reverse. If the
obstruction interrupts the sensor beam, the opener lights
will blink for five seconds.
WARNING
WARNING WARNING
®
® Keyless Entry System.
9. If one control (force or travel limits) is adjusted, the other
control may also need adjustment.
10. After ANY adjustments are made, the safety reversal system
MUST be tested.
11. Safety reversal system MUST be tested every month.
Garage door MUST reverse on contact with 1-1/2" high
(3.8 cm) high object (or a 2x4 laid flat) on the floor.
12. ALWAYS KEEP GARAGE DOOR PROPERLY BALANCED (see
page 3). An improperly balanced door may not reverse
when required and could result in SEVERE INJURY or
DEATH.
13. ALL repairs to cables, spring assemblies and other
hardware, ALL of which are under EXTREME tension, MUST
be made by a trained door systems technician.
14. ALWAYS disconnect electric power to garage door opener
BEFORE making ANY repairs or removing covers.
SAVE THESE INSTRUCTIONS.
15.
6. If obstructed while opening, the door will stop.
7. If fully open, the door will not close when the beam is
broken. The sensor has no effect in the opening cycle.
If the sensor is not installed, or is misaligned, the door
won't close from a hand-held remote. However, you can
close the door with the Door Control, the Outside Keylock,
or Keyless Entry, if you activate them until down travel is
complete. If you release them too soon, the door will
reverse.
The opener lights will turn on under the following
conditions: when the opener is initially plugged in; when
power is restored after interruption; when the opener is
activated.
They will turn off automatically after 4-1/2 minutes or
provide constant light when the Light feature on the
Multi-Function Door Control is activated. Bulb size is A19.
Bulb power is 100 watts maximum.
Security✚ ® light feature: Lights will also turn on when
someone walks through the open garage door. With a
Multi-Function Door Control, this feature may be turned off
as follows: With the opener lights off, press and hold the
light button for 10 seconds, until the light goes on, then off
again. To restore this feature, start with the opener lights
on, then press and hold the light button for 10 seconds
until the light goes off, then on again.
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