Troubleshooting - Chamberlain 8355W 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.
DIAGNOSTIC CODE
Up Arrow Flash(es) Down Arrow Flash(es)
1 1
1 2
1 3
1 4
1 5
1 6
2 1-5
3 2
3 3
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.
The battery status LED is constantly flashing green.*
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.
Battery backup charging circuit error, replace the logic board. *(if applicable)
43