Chamberlain 9902 - Manual (Page 34)

1. Does the opener have electric power? Plug a lamp into the outlet. If it doesn't light, check the
fuse box or the circuit breaker. (Some outlets are controlled by a wall switch.)
2. Have you disabled all door locks? Review installation instruction warnings on Page 11.
3. Is there a build-up of ice or snow under the door? The door may be frozen to the ground.
Remove any restriction.
4. The garage door spring may be broken. Have it replaced.
5. Repeated operation may have tripped the overload protector in the motor. Wait
15 minutes. Try again.
Having a Problem?
Situation Probable Cause & Solution
The opener doesn't
operate from either
the door control or
the remote control:
Opener operates from
the remote control, but
not from the door
control: 1. Is the door control push bar lit? If not, remove the bell wire from the opener terminal
screws. 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.
2. Are the wiring connections correct? Review Installation Step 7, page 21.
The door operates from
the door control, but not
from the remote
control: 1. Is the door push bar flashing? If the Lock button is on, turn it off.
2. Your opener needs to re-learn a remote control code. Refer to instructions on the opener
panel.
3. Program the receiver to match the remote control code.
4. Repeat the receiver programming procedure with all remote controls.
The remote control has
short range:
The garage door
opens and closes by
itself: 1. Be sure that all remote control push buttons are off.
2. Remove the bell wire from the door control terminals and operate from the remote control
only. If this solves the problem, the door control is faulty (replace), or there is an
intermittent short on the wire between the door control and the opener.
3. Clear memory and reprogram all remote controls.
The door doesn't open
completely: 1. Is something obstructing the door? Remove the obstruction or repair the door.
2. If the door has been working properly but now doesn't open all the way, increase the up
force. See page 29.
3. If door opens at least 5 feet, the travel limits may need to be increased. One turn equals
2 inches of travel. See page 28.
Repeat the safety reverse test after the adjustment is complete.
The door stops but
doesn't close
completely: Review the travel limits adjustment procedures on page 28.
Repeat the safety reverse test after any adjustment of door arm length, close force or down
limit.
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1. Change the location of the remote control in your car.
2. Check to be sure the antenna on the right side panel of opener extends fully.
3. Some installations may have shorter range due to a metal door, foil backed insulation, or
metal garage siding.
Opener noise is
disturbing in living
quarters of home: If operational noise is a problem because of 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.