Care Of Your Garage Door Opener; Having A Problem; Care Of Your Opener - Chamberlain 1255GMR – 1/2HP Owner's Manual

Care of Your Opener

LIMIT AND FORCE ADJUSTMENTS:
Weather conditions may cause
some minor changes in door
operation requiring some
readjustments, particularly during
the first year of operation.
Pages 24 and 25 refer to the
limit and force adjustments. Only
a screwdriver is required. Follow
the instructions carefully.
Repeat the safety reverse test
(page 26) after any adjustment
of limits or force.
MAINTENANCE SCHEDULE
Once a Month
• Manually operate door. If it is unbalanced or
binding, call a trained door systems technician.
• Check to be sure door opens & closes fully. Adjust
limits and/or force if necessary. (See pages 24
and 25.)
• Repeat the safety reverse test. Make any
necessary adjustments. (See page 26.)
Twice a Year
• Check chain tension. Disconnect trolley first. Adjust
if necessary (See page 7.)
Once a Year
• Oil door rollers, bearings and hinges. The opener
does not require additional lubrication. Do not
grease the door tracks.
THE REMOTE CONTROL BATTERY
WARNING
To prevent possible SERIOUS INJURY or DEATH:
• NEVER allow small children near batteries.
• If battery swallowed, immediately notify doctor.
The lithium battery should produce power for
up to 5 years. To replace battery, use
the visor clip or screwdriver blade to
pry open the case as shown. Insert
battery positive side up.
Dispose of old battery properly.
NOTICE: To comply with FCC and/or Industry Canada rules, adjustment or
modifications of this receiver and/or transmitter are prohibited, except for changing
the code setting or replacing the battery. THERE ARE NO OTHER USER
SERVICEABLE PARTS.

Having a Problem?

1. The opener doesn't operate from either the
• Does the opener have electric power? Plug a lamp
INCREASE TRAVEL
DOWN UP
LIMIT CONTROLS
(Left side panel)
• Have you disabled all door locks? Review
9 9
1 1
• Is there a build-up of ice or snow under the door?
7 3 7 3
5 5
KG
KG
FORCE CONTROLS
• The garage door spring may be broken. Have it
(Back panel)
• Repeated operation may have tripped the
2. Opener operates from the remote, but not from
• Is the door control lit? If not, remove the bell wire
• Are the wiring connections correct? Review
3. The door operates from the Door Control, but
• Is the door push bar flashing? If your model has
• Program the opener to match the remote control
4. The remote control has short range:
• Change the location of the remote control in your
• Check to be sure the antenna on the side or back
• Some installations may have shorter range due to
5. Opener noise is disturbing in living quarters of
• If operational noise is a problem because of
29
Door Control or the remote control:
into the outlet. If it doesn't light, check the fuse box
or the circuit breaker. (Some outlets are controlled
by a wall switch.)
installation instruction warnings on page 7.
The door may be frozen to the ground. Remove
any restriction.
replaced.
overload protector in the motor. Wait 15 minutes
and try again.
the Door Control:
from the motor unit terminals. Short the red and
white terminals by touching both terminals at the
same time with a piece of wire. If the opener runs,
check for a faulty wire connection at the door
control, a short under the staples, or a broken
wire.
Installation Step 6, page 14.
not from the remote control:
the Lock feature, make sure it is off.
code. (Refer to instructions on the motor unit
panel.) Repeat with all remotes.
car.
panel of motor unit extends fully downward.
a metal door, foil backed insulation, or metal
garage siding.
home:
proximity of the opener to the living quarters, the
Vibration Isolator Kit 41A3263 can be installed.
This kit was designed to minimize vibration to the
house and is easy to install.