Controlled Products Systems Group 8550C-7 - Manuel (Page 26)

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To reduce the risk of FIRE or INJURY to persons:
•
Disconnect ALL electric and battery power
BEFORE performing ANY service or
maintenance.
• Use ONLY LiftMaster part # 485LM for
replacement battery.
• DO NOT dispose of battery in fire. Battery may
explode. Check with local codes for disposal
instructions.
1 Install the battery
1.1 Unplug the garage door opener.
1.2 Open the light lens on the right side panel of the garage door opener. Use a Phillips
head screwdriver to remove the battery cover on the garage door opener.
1.3 Partially insert the battery into the battery compartment with the terminals facing out.
1.4 Connect red (+) and black (-) wires from the garage door opener to the
corresponding terminals on the battery.
1.5 Replace the battery cover.
1.6 Plug in the garage door opener.
1.7 Wait for the green Battery Status LED to start flashing before proceeding to test the
battery.
Battery
Status LED
ALWAYS wear protective gloves and eye
protection when changing the battery or working
around the battery compartment.
* If applicable.
2 Test the battery
2.1
Unplug the garage door
opener. The battery status LED
will either glow solid orange
indicating opener is operating
on battery power or will flash
indicating low battery power.
NOTE: Make sure the garage
door opener is unplugged.
2.2
Open and close the door using the
remote control or door control.
NOTE: The garage door opener may
run slower if the battery is not fully
charged. The battery will take 24 hours
to fully charge.
2.3 Plug in the garage door opener. Verify
the battery status LED flashing green,
indicating the battery is charging.
Battery Backup*