LiftMaster LM3800W-2 Mode D'emploi page 9

18 Connect Power
To avoid installation difficulties, do not run the garage door opener at this time.
To reduce the risk of electric shock, your garage door opener has a grounding type plug. This plug will only fit into a grounding type outlet. If the plug
doesn't fit into the outlet you have, contact a qualified electrician to install the proper outlet.
There is only one option for connecting power:
TYPICAL WIRING
Plug in the garage door opener into a grounded outlet.
19 Install the Battery Backup
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 485EU for replacement battery. DO NOT dispose of battery in fire. Battery
may explode. Check with local codes for disposal instructions.
When in Battery Backup mode, MyQ Smartphone Control and wireless MyQ devices will be disabled. In battery backup
mode, the automatic garage door lock will unlock when the garage door is opened, and will remain disabled until power is
restored.
1. Unplug the garage door opener.
2. Use screwdriver to remove the battery cover on the garage door opener.
3. Partially insert the battery into the battery compartment with the terminals facing out.
4. Connect red (+) and black (-) wires from the garage door opener to the corresponding terminals on the battery.
5. Replace the battery cover.
6. Plug in the garage door opener.
BATTERY STATUS LED (B)
GREEN LED:
All systems are normal.
• A solid green LED light indicates the battery is fully charged.
• A flashing green LED indicates the battery is being charged.
ORANGE LED:
The garage door opener has lost power and is in battery backup mode.
• A solid orange LED with beep, sounding approximately every 2 seconds, indicates the garage door opener is operating on battery power.
• A flashing orange LED with beep, sounding every 30 seconds, indicates the battery is low.
RED LED:
The garage door opener's 12V battery needs to be replaced.
• 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.
NOTE: Battery does not have to be fully charged to operate the garage door opener.
20 Program the Travel
Incorrect adjustment of garage door travel limits will interfere with proper operation of safety reversal system. After ANY
adjustments are made, the safety reversal system MUST be tested. Door MUST reverse on contact with 40 mm object on
floor. To prevent damage to vehicles, be sure fully open door provides adequate clearance.
Travel limits regulate the points at which the door will stop when moving up or down.Unplug the garage door opener.
While programming, the UP and DOWN buttons can be used to move the door as needed.
1. Press and hold the Adjustment Button (A) until the UP Button (U) begins to flash and/or a beep is heard.
2. Press and hold the UP Button (U) until the door is in the desired UP position.
3. Once the door is in the desired UP position press and release the Adjustment Button (A). The garage door opener lights will flash twice and the
DOWN Button (D) will begin to flash.
4. Press and hold the DOWN Button (D) until the door is in the desired DOWN position.
5. Once the door is in the desired DOWN position press and release the Adjustment Button (A). The garage door opener lights will flash twice and
the UP Button (U) will begin to flash.
6. Press and release the UP Button (U). When the door travels to the programmed UP position, the DOWN Button (D) will begin to flash.
7. Press and release the DOWN Button (D). The door will travel to the programmed DOWN position. Programming is complete.
If the garage door opener lights are flashing 5 times during the steps for Program the Travel, the programming has timed out. If the cable tension
monitor is not installed or is sensing too much slack in the cable, the garage door opener light will flash 5 times. Ensure the cable tension monitor is
correctly installed then follow the steps for Program the Travel. If the garage door opener lights are flashing 10 times during the steps for Program
the Travel, the infrared photocells are misaligned or obstructed. When the sensors are aligned and unobstructed, cycle the door through a complete
up and down cycle using the remote control or the UP and DOWN buttons. Programming is complete. If you are unable to operate the door up and
down, repeat the steps for Programming the Travel.
(Optional accessory)
8 / en