LiftMaster 8550W 8550W Owners Manual - Page 39

Troubleshooting DIAGNOSTIC CODE Up Arrow Flash Down Arrow (es) Flash(es) 4 1-4 4 5 4 6 SYMPTOM SOLUTION Door is moving stops and or reverses. 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 26). Opener runs approximately 6-8", stops and reverses. Communication error to travel module. Check travel module connections, replace module if necessary. The garage door opener will not close and the light Safety sensors are misaligned or were momentarily obstructed. Realign both sensors to 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. The garage door opener will NOT enter Wi-Fi® LEARN mode: l After the initial installation of the garage door opener, the garage door opener must complete a full cycle (open and closed) before the Wi-Fi LEARN mode can be activated. l If there has been a recent power outage, the garage door opener must complete a full cycle before the Wi-Fi LEARN mode can be activated. See page 32 to activate Wi-Fi LEARN mode. The garage door opener will NOT connect to my Wi-Fi network: l Network password entered incorrectly. Double check your network password and re-enter. l Weak Wi-Fi signal in the garage. Ensure the Wi-Fi signal is reaching the garage, see page 4 or visit WiFiHelp.LiftMaster.com for more information.The garage door opener will NOT connect to my Wi-Fi network: The garage door opener can beep for several reasons: l (If applicable) Operating on battery power or the 12 Vdc battery needs to be replaced, see 28. l Garage door opener has been activated through a device or feature such as Timer-to-Close, garage door monitor or MyQ® Internet Gateway, see page 31. The garage door opener will not enter Wi-Fi mode: If this is a new installation, cycle the garage door opener. Follow My door will not close and the light bulbs blink on my motor unit: The safety reversing sensor must be connected and aligned correctly before the garage door opener will move in the down direction. l Verify the safety sensors are properly installed, aligned and free of any obstructions. My remote control will not activate the garage door: l Verify the lock feature is not activated on the door control. l Reprogram the remote control. l If the remote control will still not activate the door check the diagnostic codes to ensure the garage door opener is working properly. My garage door opener light(s) will not turn off when the door is open: The garage door opener is equipped with a feature that turns the light on when the safety reversing sensors have been obstructed or when the motion sensor on the door control detects movement in the garage. This feature can be disabled using the door control, see page 34. My neighbor's remote control opens my garage door: Erase the memory from your garage door opener and reprogram the remote control(s). My vehicle's Homelink® is not programming to my garage door opener: Depending on the make, model, and year of your vehicle an external adapter may be required. Visit www.homelink.com for additional information. 39