LiftMaster 8557 8557 Manual - Page 27

Battery Backup* Charge the Battery Battery Status LED GREEN LED: The battery charges when the garage door opener All systems are normal. is plugged into a 110Vac electrical outlet that has • A solid green LED light indicates the battery is power and requires 24 hours to fully charge. A fully fully charged. charged battery supplies 12Vdc to the garage door • A flashing green LED indicates the battery is opener for one to two days of normal operation being charged. during an electrical power outage. After the electrical power has been restored, the battery will recharge within 24 hours. The battery will last approximately 1 to 2 years with normal usage. Instructions for replacement are provided with the ORANGE LED: The garage door opener has lost power and is in battery backup mode. battery. To obtain maximum battery life and prevent • A solid orange LED with beep, sounding damage, disconnect the battery when the garage approximately every 2 seconds, indicates the door opener is unplugged for an extended period garage door opener is operating on battery of time, such as a summer or winter home. power. NOTE: The Battery Status LED is most visible with the garage door opener light off. Battery does not have to be fully charged to operate the garage door opener. Battery Status LED • A flashing orange LED with beep, sounding NOTE: When the garage door opener is in battery every 30 seconds, indicates the battery is low. backup mode the garage door opener lights, RED LED: Timer-to-Close, and Remote Close features are The garage door opener's 12V battery needs to be unavailable. replaced. * If applicable, part number 485LM. • A solid red LED with beep, sounding every 30 seconds, indicates the 12V battery will no longer hold a charge and needs to be replaced. Replace the battery back up to maintain the battery backup feature. 27