Troubleshooting; Diagnostic Chart - LiftMaster ATSW Mode D'emploi

Troubleshooting

Diagnostic Chart

Your door operator is programmed with self-diagnostic capabilities. The UP and DOWN arrows on the door operator flash the diagnostic codes.
DIAGNOSTIC CODE
Up Arrow Flash Down Arrow Flash
(es) (es)
1 1
1 2
1 3
1 4
1 5
1 6
2 1-5
3 2
SYMPTOM
The door operator will not close and the light bulbs flash.
The door operator will not close and the light bulbs flash.
The door control will not function.
The door operator will not close and the light bulbs flash.
Door moves 6-8" (15-20 cm) stops or reverses.
No movement, only a single click.
Operator 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.
SOLUTION
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.
Check travel module for proper assembly, replace if necessary.
34