Operation; Using Your Garage Door Opener - Chamberlain LiftMaster 3275C Owner's Manual

OPERATION

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✚
®
Security✚ Keyless Entry System. 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
IMPORTANT SAFETY INSTRUCTIONS
®
remote controls and one
WARNING WARNING
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 will not
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.
26