LiftMaster 8557W 8550W Users Guide Manual - Page 9

Battery Backup (If applicable) The battery backup allows access in and out of your garage, when the power is out. When the garage door opener is operating on battery power, the garage door opener will run slower and the lights, Timer-to-Close, and remote close features are disabled. During a power outage the battery supplies power for one to two days of operation. For maximum battery life and prevent damage, disconnect the battery when the garage door opener is unplugged for an extended period of time. Battery Status LED • Solid green LED - Charged battery • Flashing green LED - Charging battery • Solid orange LED with beep - Operating on battery power • Flashing orange LED with beep - Low battery • Solid red LED with beep - Replace battery Door Control Push Bar: Open/Close garage door. Navigation Buttons: Access menu: Clock Setup, Timer-to-Close, Lock, Program, Temperature, Language, Light Settings, Contrast Adjust, Maintenance Alert System, and Wi-Fi Setup*. Motion Sensor Light Button *The garage door opener must run through a complete cycle before it will activate Wi-Fi programming. For help related to Wi-Fi, visit WiFiHelp.LiftMaster.com. 9