Troubleshooting - Chamberlain RollerLift Plus CR855MYQ Installation And Operating Instructions Manual

23

TROUBLESHOOTING

1. The opener will not operate from either the
UP/DOWN activation button or the transmitters:
• Does the opener have electric power? Plug a lamp
into
the outlet. If it does not work, check the fuse box.
• Have you disabled all door locks? Review the
installation safety instruction warnings on page 1.
• Is there a build-up of ice or snow under the door? The
door may be frozen to the ground. Remove any
restriction.
• The garage door spring may be broken. Have it
replaced by contacting a garage door repairer.
2. Opener operates from the transmitter, but not
from the wired wall control terminals:
• Check that the wiring connections are correct.
3. The door operates from the UP/DOWN activation
buttons but not from the wireless wall control or
transmitter:
• Program the opener to match the transmitter code.
Repeat with all transmitters.
4. The transmitter has short range:
• Change the location of the transmitter.
• Check to be sure the antenna on the bottom of the
opener extends fully downward.
• Some installations may have shorter range due to a
metal door, foil backed insulation, or metal garage
siding.
• The batteries may be flat. Replace the batteries.
5. The garage door opens and closes by itself:
• Be sure that no transmitter buttons are being
pressed.
• Clear the memory and re-program all wireless wall
controls and transmitters.
6. The door reverses and stops before opening
completely:
• Is something obstructing the door? Is it out of
balance,
or are the springs broken? Remove the obstruction or
repair the door.
7. Door reverses for no apparent reason and
• Check The Protector System
opener lights flash 10 times:
have installed this accessory). If the red light on the
beam is flashing, the alignment is incorrect.
(IR Beams) (if you
TM
15
8. The door opens but will not close (or reverses
while closing):
• Is something obstructing the door? Pull the manual
release handle. Operate the door manually. If it is
unbalanced or binding, call a trained door systems
technician.
• Clear any ice or snow from the garage floor area
where
the door closes.
• Repeat the limit and force setting. Repeat safety
reverse test after adjustments.
9. The opener strains to operate the door:
• The door may be out of balance or the springs may
be broken. Close the door and use the manual
release to disconnect the door. Open and close the
door manually. A properly balanced door will stay in
any point of travel while being supported entirely by
its springs. If it does not, disconnect the opener and
call a trained door systems technician.
10. The opener motor hums briefly, then will not
work:
• Check that the door is not in manual release mode
(refer to sections 9 or 10).
• The garage door springs may be broken.
• If the problem occurs on the first operation of the
opener, the door may be locked. Disable any door
locks.
11. The opener will not operate due to a power
failure:
• Use the manual release handle to disconnect the
door. The door can be opened and closed manually.
When power is restored, re-engage the opener to
operate it via a transmitter.
12. The LED Indicators on the control panel are
flashing in sequence:
• Check the diagnostic code in section 25.