LiftMaster 8160 8160 Installation Manual - Page 39
Troubleshooting, Diagnostic Chart
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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 SYMPTOM SOLUTION Up Arrow Flash(es) Down Arrow Flash(es) 1 1 The garage door opener will not close Safety sensors are not installed, connected, or wires may be cut. Inspect sensor wires for and the light bulbs flash. a disconnected or cut wire. 1 2 The garage door opener will not close There is a short or reversed wire for the safety sensors. Inspect safety sensor wire at all and the light bulbs flash. staple and connection points, replace wire or correct as needed. 1 3 The door control will not function. 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. 1 4 The garage door opener will not close Safety sensors are misaligned or were momentarily obstructed. Realign both sensors to and the light bulbs flash. 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. 1 5 Door moves 6-8" (15-20 cm) stops or Manually open and close the door. Check for binding or obstructions, such as a broken reverses. spring or door lock, correct as needed. Check wiring connections at travel module and at the logic board. Replace travel module if necessary. No movement, only a single click. 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. Opener hums for 1-2 seconds no movement. 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. 1 6 Door coasts after it has come to a Program travel to coasting position or have door balanced by a trained door systems complete stop. technician. 2 1-5 No movement, or sound. Replace logic board. 3 2 Unable to set the travel or retain Check travel module for proper assembly, replace if necessary. position. 39