Troubleshooting - Craftsman CMXEOCG781 Owner's Manual

TROUBLESHOOTING

DIAGNOSTIC CHART
Your garage door opener is programmed with self-diagnostic capabilities. The UP and DOWN arrows on the garage door opener flash the diagnostic codes.
UP ARROW DOWN ARROW
FLASH(ES) FLASH(ES)
1 1
1 2
1 3
1 4
1 5
1 6
2 1-5
3 2
3 3
4 1-4
SYMPTOM
The garage door opener will not close and
the light bulbs flash.
The garage door opener will not close and
the light bulbs flash.
The door control will not function.
The garage door opener will not close and
the light bulbs flash.
Door moves 6-8" (15-20 cm) stops or
reverses.
No movement, only a single click.
Opener hums for 1-2 seconds no
movement.
Door coasts after it has come to a
complete stop.
No movement, or sound.
Unable to set the travel or retain position. Check travel module for proper assembly, replace if necessary.
The battery status LED is constantly
flashing green.
Door is moving stops or reverses.
Safety reversing sensors are not installed, connected, or wires may be cut.
Inspect sensor wires for a disconnected or cut wire.
There is a short or reversed wire for the safety reversing sensors. Inspect safety
sensor wire at all staple and connection points, replace wire or correct as
needed.
The wires for the door control are shorted or the door control is faulty. Inspect
door control wires at all staple and connection points, replace wire or correct
as needed.
Safety reversing sensors are misaligned or were momentarily obstructed.
Realign both sensors to ensure both LEDs are steady and not flickering. Make
sure nothing is hanging or mounted on the door that would interrupt the
sensor's path while closing.
Manually open and close the door. Check for binding or obstructions, such as a
broken spring or door lock, correct as needed. Check wiring connections at
travel module and at the logic board. Replace travel module if necessary.
Manually open and close the door. Check for binding or obstructions, such as a
broken spring or door lock, correct as needed. Replace logic board if
necessary.
Manually open and close the door. Check for binding or obstructions, such as a
broken spring or door lock, correct as needed. Replace motor if necessary.
Program travel to coasting position or have door balanced by a trained door
systems technician.
Replace logic board.
Battery backup charging circuit error, replace the logic board.
Manually open and close the door. Check for binding or obstructions, such as a
broken spring or door lock, correct as needed. If the door is binding or sticking
contact a trained door systems technician. If door is not binding or sticking
attempt to reprogram travel (refer to page 31).
42
SOLUTION