Troubleshooting; Diagnostic Chart - LiftMaster Contractor Série Guide De L'utilisateur

Troubleshooting

Diagnostic Chart

Your garage door opener is programmed with self-diagnostic capabilities. The UP and DOWN arrows on the garage door opener will fl ash the diagnostic codes.
DIAGNOSTIC CODE
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
SYMPTOM
The garage door opener will not close and the light
bulbs fl ash.
The garage door opener will not close and the light
bulbs fl ash.
The door control will not function.
The garage door opener will not close and the light
bulbs fl ash.
Door moves 6-8" 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.
Safety 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 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 sensors are misaligned or were momentarily obstructed. Realign both sensors to
ensure both LEDs are steady and not fl ickering. 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.
Check travel module for proper assembly, replace if necessary.
13
SOLUTION