LiftMaster LA412UL Instruction Manual (LA412PKGUL, LA412DC, and LA412DCS)

This page presents the LiftMaster LA412UL residential 12 Vdc solar-powered vehicular swing gate operator installation manual as searchable, linkable HTML, for the LA412PKGUL single arm package, the LA412DC primary 12 Vdc actuator arm, and the LA412DCS secondary 12 Vdc actuator arm: specifications, safety requirements, installation, wiring, adjustment, programming, troubleshooting, diagnostic codes, maintenance, solar panels, and replacement parts.

Common tasks: Set the limits | Program a remote | Wiring diagram | Diagnostic codes | Gate will not close | Replace batteries | Replacement parts

LiftMaster LA412UL Manual Overview

The LiftMaster LA412UL is a residential 12 Vdc vehicular swing gate operator that runs from solar power only (the manual lists the main AC supply as "N/A - Solar Only"). LiftMaster's installation manual (document 01-39383 revision B) covers the LA412PKGUL single arm package, the LA412DC primary 12 Vdc actuator arm for single swing gate applications, and the LA412DCS secondary 12 Vdc actuator arm for dual swing gate applications. LiftMaster states that the operator requires a LiftMaster external monitored entrapment protection device to be installed in all entrapment zones, and that it must be installed and serviced by a trained gate systems technician only.

What Is in the LA412UL Carton

Not shown in LiftMaster's carton illustration (page 6): documentation packet and hardware bag. LiftMaster's hardware inventory lists the following, with quantities shown for the LA412DC (doubled for the LA412DCS):

• Flat washer 5/16 in. (1), lock washer 5/16 in. (1), hex nut 5/16 in.-18 (1), hex bolt 5/16 in.-18 x 1-1/2 in. (1)
• Flat washer 3/8 in. (3), lock washer 3/8 in. (3), hex nut 3/8 in.-16 (3), hex bolt 3/8 in.-16 x 1-1/2 in. (1), carriage bolt 3/8 in. x 5-15/16 in. (2)
• Key (2), keylock cap, pin (2), hairpin clip (2)

Optional accessories (LiftMaster, page 6): the large metal control box for solar applications (Model XLSOLARCONTUL), ideal for installations that require additional room in the control box (batteries not included), which requires two 33AH batteries, a battery tray, and a solar battery harness; and a push-to-open bracket (Model 50-19503) if your application requires the gate to be pushed open. See Accessories.

Source: LiftMaster manual, 01-39383 revision B, page 6.

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LiftMaster LA412UL Specifications

LA412UL operator specifications as printed by LiftMaster (page 7)

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*Travel time and range are affected by the A and B mounting dimensions (see Determine Mounting Location).

Source: LiftMaster manual, 01-39383 revision B, page 7.

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Important Safety Information

This section reproduces the safety requirements that LiftMaster places at the front of the LA412UL manual (pages 1 to 5). Safety text is kept close to the manufacturer's wording on purpose.

Who Should Install and Service the LA412UL

LiftMaster's manual also includes a Safety Symbol and Signal Word Review on page 2. See the original manual for the symbols and signal words LiftMaster uses.

Source: LiftMaster manual, 01-39383 revision B, page 1.

Gate Operator Usage Classes

LiftMaster's manual defines four vehicular gate operator usage classes (page 3). The LA412UL specifications list Class I.

• Class I, Residential Vehicular Gate Operator: a vehicular gate operator (or system) intended for use in garages or parking areas associated with a residence of one to four single families.
• Class II, Commercial/General Access Vehicular Gate: a vehicular gate operator (or system) intended for use in a commercial location or building such as a multi-family housing unit (five or more single family units), hotel, garages, retail store, or other buildings accessible by or servicing the general public.
• Class III, Industrial/Limited Access Vehicular Gate: a vehicular gate operator (or system) intended for use in an industrial location or building such as a factory or loading dock area or other locations not accessible by or intended to service the general public.
• Class IV, Restricted Access Vehicular Gate Operator: a vehicular gate operator (or system) intended for use in a guarded industrial location or building such as an airport security area or other restricted access locations not servicing the general public, in which unauthorized access is prevented via supervision by security personnel.

Source: LiftMaster manual, 01-39383 revision B, page 3.

UL 325 Entrapment Protection Requirements for the LA412UL

• A minimum of two independent* monitored entrapment protection devices are required to be installed at each entrapment zone.
• Every installation is unique. It is the responsibility of the installer to install external monitored entrapment protection devices in each entrapment zone.
• This vehicular swing gate operator will operate only after installation of a minimum of two independent* monitored entrapment protection devices in either the open or close direction. If no entrapment zone exists in the other direction of gate travel, then the inherent device (built into the operator) is all that is required in that direction.
• Entrapment protection device types include inherent (built into the operator), monitored external photoelectric sensors, or monitored external edge sensors.
• This operator is provided with an inherent entrapment protection device built into the operator that serves as one of the two independent devices.

* Independent: the same type of device shall NOT be used for both entrapment protection devices.

Source: LiftMaster manual, 01-39383 revision B, page 3.

Safety Installation Information

1. Vehicular gate systems provide convenience and security. Gate systems are comprised of many component parts. The gate operator is only one component. Each gate system is specifically designed for an individual application.
2. Gate operating system designers, installers and users must take into account the possible hazards associated with each individual application. Improperly designed, installed or maintained systems can create risks for the user as well as the bystander. Gate systems design and installation must reduce public exposure to potential hazards.
3. A gate operator can create high levels of force in its function as a component part of a gate system. Therefore, safety features must be incorporated into every design. Specific safety features include edge sensors (contact), photoelectric sensors, vertical posts, and instructional and precautionary signage.
4. Install the gate operator only when: (a) the operator is appropriate for the construction and the usage class of the gate; (b) all exposed pinch points are eliminated or guarded, and guarding is supplied for exposed rollers.
5. The operator is intended for installation only on gates used for vehicles. Pedestrians must be supplied with a separate access opening. The pedestrian access opening shall be designed to promote pedestrian usage. Locate the gate such that persons will not come in contact with the vehicular gate during the entire path of travel of the vehicular gate.
6. The gate must be installed in a location so that enough clearance is supplied between the gate and adjacent structures when opening and closing to reduce the risk of entrapment. Swinging gates shall not open into public access areas.
7. The gate must be properly installed and work freely in both directions prior to the installation of the gate operator. (Per LiftMaster, one or more contact sensors shall be located on the bottom edge of a swing gate when the bottom edge is greater than 4 inches (10.1 cm) but less than 16 inches (406 mm) above the ground at any point in its arc of travel; see item 12.)
8. Permanently mounted access controls intended for users to activate must be located at least 6 feet (1.8 m) away from any moving part of the gate and where the user is prevented from reaching over, under, around or through the gate to operate the controls. Outdoor or easily accessible controls shall have a security feature to prevent unauthorized use. Exception: emergency access controls only accessible by authorized personnel (e.g. fire, police) may be placed at any location in the line-of-sight of the gate.
9. The Stop and/or Reset (if provided separately) must be located in the line-of-sight of the gate. Activation of the reset control shall not cause the operator to start.
10. A minimum of two (2) WARNING SIGNS shall be installed in the area of the gate. Each placard is to be visible by persons located on the side of the gate on which the placard is installed.
11. For a gate operator utilizing a non-contact sensor: (a) reference the owner's manual regarding placement of non-contact sensors for each type of application (see Install Entrapment Protection); (b) care shall be exercised to reduce the risk of nuisance tripping, such as when a vehicle trips the sensor while the gate is still moving; (c) one or more non-contact sensors shall be located where the risk of entrapment or obstruction exists, such as the perimeter reachable by a moving gate or barrier.
12. For a gate operator utilizing a contact sensor such as an edge sensor: (a) one or more contact sensors shall be located where the risk of entrapment or obstruction exists; (b) a hard wired contact sensor shall be located and its wiring arranged so the communication between the sensor and the gate operator is not subject to mechanical damage; (c) a wireless device such as one that transmits radio frequency (RF) signals to the gate operator for entrapment protection functions shall be located where the transmission of the signals is not obstructed or impeded by building structures, natural landscaping or similar obstruction, and shall function under the intended end-use conditions; (d) one or more contact sensors shall be located on the inside and outside leading edge of a swing gate. Additionally, if the bottom edge of a swing gate is greater than 4 inches (10.1 cm) but less than 16 inches (406 mm) above the ground at any point in its arc of travel, one or more contact sensors shall be located on the bottom edge.

Source: LiftMaster manual, 01-39383 revision B, page 4.

Gate Construction Requirements (ASTM F2200)

LiftMaster states that vehicular gates should be installed in accordance with ASTM F2200, Standard Specification for Automated Vehicular Gate Construction (contact ASTM at 610-832-9585 or www.astm.org for a copy). The manual lists these provisions (page 5):

General requirements

• 1.1 Gates shall be constructed in accordance with the provisions given for the appropriate gate type listed; refer to ASTM F2200 for additional gate types.
• 1.2 Gates shall be designed, constructed and installed to not fall over more than 45 degrees from the vertical plane, when a gate is detached from the supporting hardware.
• 1.3 Gates shall have smooth bottom edges, with vertical bottom edged protrusions not exceeding 0.50 inches (12.7 mm) when other than the exceptions listed in ASTM F2200.
• 1.4 The minimum height for barbed tape shall not be less than 8 feet (2.44 m) above grade and for barbed wire shall not be less than 6 feet (1.83 m) above grade.
• 1.5 An existing gate latch shall be disabled when a manually operated gate is retrofitted with a powered gate operator.
• 1.6 A gate latch shall not be installed on an automatically operated gate.
• 1.7 Protrusions shall not be permitted on any gate; refer to ASTM F2200 for exceptions.
• 1.8 Gates shall be designed, constructed and installed such that their movement shall not be initiated by gravity when an automatic operator is disconnected. For a vehicular horizontal swing gate (1.8.1), this shall not result in continuous, unimpeded movement in either direction along the arc of its path of travel.
• 1.9 For pedestrian access in the vicinity of an automated vehicular gate, a separate pedestrian gate shall be provided. The pedestrian gate shall be installed in a location such that a pedestrian shall not come in contact with a moving vehicular access gate. A pedestrian gate shall not be incorporated into an automated vehicular gate panel.

Specific applications

• 2.1 Any non-automated gate that is to be automated shall be upgraded to conform to the provisions of this specification.
• 2.2 This specification shall not apply to gates generally used for pedestrian access and to vehicular gates not to be automated.
• 2.3 When the gate operator requires replacement, the existing gate shall be upgraded to conform to the provisions of this specification.
• 2.4 When the gate of an automated gate system requires replacement, the new gate shall conform to the provisions of this specification.

Vehicular horizontal swing gates

• 3.1 The following provisions apply to Class I, Class II and Class III vehicular horizontal swing gates. 3.1.1 Gates shall be designed, constructed and installed so as not to create an entrapment area between the gate and the supporting structure or other fixed object when the gate moves toward the fully open position, subject to 3.1.1.1 and 3.1.1.2.
• 3.1.1.1 The width of an object (such as a wall, pillar or column) covered by a swing gate when in the open position shall not exceed 4 inches (102 mm), measured from the center line of the pivot point of the gate. Exception: for a gate not in compliance with this provision, the defined area must be provided with entrapment protection per UL 325.
• 3.1.1.2 Except for the zone specified in Section 3.1.1.1, the distance between a fixed object such as a wall, pillar or column, and a swing gate when in the open position shall not be less than 16 inches (406 mm). Exception: for a gate not in compliance with this provision, the defined area must be provided with entrapment protection per UL 325.
• 3.2 Class IV vehicular horizontal swing gates shall be designed, constructed and installed in accordance with security related parameters specific to the application in question.

Source: LiftMaster manual, 01-39383 revision B, page 5.

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LiftMaster LA412UL Installation

LiftMaster presents LA412UL installation as twelve steps, followed by limit and force adjustment and an obstruction test. Each step below is labeled with the matching LiftMaster step number.

1. Step 1, Attach brackets to operator
2. Step 2, Determine mounting location
3. Step 3, Position the operator
4. Step 4, Secure the brackets
5. Step 5, Install the control box
6. Step 6, Earth ground rod
7. Step 7, Wire the operator arm to the control board
8. Step 8, Dual gate setup
9. Step 9, Install entrapment protection
10. Step 10, Install solar panels
11. Step 11, Power wiring
12. Step 12, Finish installation

After Step 12, continue with limit and force adjustment and the obstruction test.

Installation Requirements and Tips

LiftMaster's do's:

• Weld a horizontal bar across the entire gate on any installation for strength. Make sure that the operator is mounted level or it will not function properly.
• The operator can be mounted on top of the gate frame.
• The operator must be installed at least 12 inches (30 cm) from the ground.
• Make sure there is slack in the operator cable.

LiftMaster's don'ts:

• DO NOT install upside down.
• DO NOT install on ANY pedestrian passageways, doorways, or gates.
• DO NOT install next to sprinklers or any area that may expose the bottom of the operator to water.
• DO NOT over-bend the operator cable. Doing this will cause the wires to eventually break.
• DO NOT install on uphill or downhill gates.
• DO NOT weld the crossbar on just a few pickets, or they could bend.

Source: LiftMaster manual, 01-39383 revision B, page 9.

Site Preparation

• Check the national and local building codes BEFORE installation.
• Trench: trench and install conduit. Before trenching, contact underground utility locating companies. Conduit must be UL approved for low and high voltage.
• Safety: entrapment protection devices are required to protect against any entrapment or safety conditions encountered in your gate application. Install a warning sign (two provided) on the inside and outside of the property, where easily visible.
• Gate: the gate must be constructed and installed according to ASTM F2200 standards (see Gate Construction Requirements), and must fit the specifications of the operator (see Specifications).
• Additional accessories: vehicle loops allow the gate to stay open when vehicles are obstructing the gate path. They are suggested for vehicles 14 feet (4.27 m) or longer and are not required but are recommended. Before installing your access control device(s), complete a site survey and determine the best device for your site needs.

Check your gate (LiftMaster): the gate MUST be level. The gate and gate post MUST be plumb. The gate MUST have a smooth bottom edge, and no protrusions should exist. Remove ANY/ALL wheels from the bottom of the gate. The gate MUST NOT hit or drag across the ground. The gate MUST swing freely and be supported entirely by its hinges.

Source: LiftMaster manual, 01-39383 revision B, page 8.

Attach Brackets to the Operator (Step 1)

Source: LiftMaster manual, 01-39383 revision B, page 10.

Determine the Mounting Location (Step 2)

Before proceeding, begin with the gate in the fully closed position. There are two methods for determining the proper location of the post brackets; either method will work depending on preference: the paper template (located on the back page of the manual, which must be cut out) or a tape measure. LiftMaster notes that there should only be a maximum of 4 inches (10.2 cm) from the center of the hinge to the edge of the post or column. If the distance is greater than 4 inches (10.2 cm), entrapment protection for this area is required.

Alternate dimensions. The ideal installation measurements are A = 7 inches (17.8 cm) and B = 7 inches (17.8 cm). If different measurements are used, the sum of A and B cannot be greater than 15 inches (38.1 cm).

LA412UL mounting dimension chart (A and B)

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Source: LiftMaster manual, 01-39383 revision B, page 11.

Position the Operator (Step 3)

The post bracket assembly can be mounted several places on the gate post.

Source: LiftMaster manual, 01-39383 revision B, page 12.

Secure the Brackets (Step 4)

Source: LiftMaster manual, 01-39383 revision B, page 13.

Install the Control Box (Step 5)

The control box MUST be mounted within 5 feet (1.52 m) of the gate operator. Mount the control box as high as possible for best radio reception. Make sure the control box is level.

Source: LiftMaster manual, 01-39383 revision B, page 14.

Source: LiftMaster manual, 01-39383 revision B, page 15.

Earth Ground Rod (Step 6)

Use the proper earth ground rod for your local area. The ground wire must be a single, whole piece of wire. Never splice two wires for the ground wire. If you cut the ground wire too short, break it, or destroy its integrity, replace it with a single wire length.

1. Install the earth ground rod within 3 feet (.9 m) of the operator.
2. Run wire from the earth ground rod to the operator. The earth ground wire will be connected later (see Step 11, Power Wiring).

LiftMaster notes that if the operator is not grounded properly the range of the remote controls will be reduced.

Source: LiftMaster manual, 01-39383 revision B, page 16.

Wire the Operator Arm to the Control Board (Step 7)

Source: LiftMaster manual, 01-39383 revision B, page 16.

Dual Gate Setup (Step 8)

There are two options for dual gate communication: wired or wireless. Follow the directions according to your application. Do not use wired and wireless communication simultaneously. Wired dual gate applications will have a longer battery standby time than wireless applications. Wireless dual gates will require the installation of two control boxes, one for each operator arm.

Source: LiftMaster manual, 01-39383 revision B, page 17.

Source: LiftMaster manual, 01-39383 revision B, page 18.

Set the bipart delay

Single control box. Occasionally in dual gate installations, one gate will need to open first and close second. This would happen if there was an ornamental overhang on one gate or if using a solenoid lock, for example. This gate is called the primary gate and needs to be connected to the Gate 1 connections on the control board. Thus, it is preferred that the control box be installed on the same side as this gate. If there is no appropriate location on that side for the control box, then mount the control box on the opposite side, but connect the operator closest to the control box to the Gate 2 connector and the operator on the opposite side to the Gate 1 connector. The BIPART DELAY switch on the control board needs to be set to the ON position.

Dual control boxes. The BIPART DELAY switch is used with dual control box applications and serves two functions. BIPART DELAY: used in applications where a maglock, solenoid lock, or decorative overlay would require one gate to close before the other; the control box with the BIPART DELAY switch ON will delay from the close limit when opening and be the first to close from the open limit. SYNCHRONIZED CLOSE: also used in applications where one gate travels a longer distance than the other; to synchronize the closing of the gates, set the BIPART DELAY switch to ON for both control boxes.

Source: LiftMaster manual, 01-39383 revision B, page 19.

Installing Entrapment Protection Devices (Step 9)

Entrapment protection MUST be installed according to the following UL 325 requirements:

• Swing gate operators require the installation of the first external monitored entrapment protection device to function.
• Every installation is unique. It is the responsibility of the installer to ensure that ALL entrapment zones are protected with an external monitored entrapment protection device, protecting both the open and close gate cycles.
• LiftMaster monitored external entrapment protection devices MUST be used with LiftMaster operators to meet UL 325 requirements, see Accessories.
• Test ALL entrapment protection devices after completing installation of the operator. For testing instructions, refer to the manual provided with your entrapment protection device.

LiftMaster's definitions:

• ENTRAPMENT: the condition when a person is caught or held in a position that increases the risk of injury.
• SWING GATE ENTRAPMENT ZONE: locations between a moving gate or moving, exposed operator components and a counter opposing edge or surface where entrapment is possible up to 1.8 m (6 ft) above grade. Such locations occur if during any point in travel: (a) the gap between the bottom of a moving gate and the ground is greater than 101.6 mm (4 in) and less than 406 mm (16 in); or (b) the distance between the center line of the pivot and the end of the wall, pillar, or column to which it is mounted when in the open or closed position exceeds 101.6 mm (4 in). Any other gap between a moving gate and fixed counter opposing edges or surfaces or other fixed objects is less than 406 mm (16 in) (examples are walls, curbs, berms or other immovable objects).

LiftMaster's illustrations (credited to the DASMA Gate Systems Safety Guide) show examples. See the original manual (page 20).

Source: LiftMaster manual, 01-39383 revision B, page 20.

Wiring entrapment protection devices

LiftMaster describes three options for wiring external devices, depending on the device and how it will function. Refer to the manual included with your entrapment protection device. The inputs are for monitored devices, which include pulsed photoelectric sensors, resistive edge sensors, and pulsed edge sensors. Only one monitored entrapment protection device may be wired to each input. Additional devices may be wired to the expansion board.

LA412UL entrapment protection inputs

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Source: LiftMaster manual, 01-39383 revision B, page 21.

Install Solar Panels (Step 10)

The LA412UL runs from solar power only. Solar panels are not listed in LiftMaster's carton illustration; the standard control box parts list on page 46 includes a 10W solar panel (SP10W12V) and the 29-NP712 battery. See Accessories for the solar panel kit (SP10W12V and SP20W12V; 30W maximum for 12 Vdc operators and a 33AH battery harness requirement).

Solar zones

Solar panel recommendations are based upon the average solar radiation and the temperature effects on batteries in the given zones as shown on the map in the manual (page 22). Local geography and weather conditions may require additional solar panels. Solar powered gate operator installations are not supported in northern climates due to cold weather and a reduced number of hours of sunlight during the winter months. The cycles/day ratings are approximations. Ratings vary based on gate construction, installation, and temperature. Solar panels cannot be installed in areas that experience long periods of heavy fog, lake effect snow, or rain.

Source: LiftMaster manual, 01-39383 revision B, page 22.

Solar usage guide

LA412UL typical system standby battery current consumption (mA), as printed by LiftMaster (page 23)

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Add up current draw by feature and accessory to determine total current draw. LiftMaster states that the use of photoelectric sensor heaters (models LMRRUL and LMTBUL) is NOT recommended in solar applications. For single and dual gate cycles per day by zone, panel wattage (10W, 20W, or 30W, which is three 10W 12V panels in parallel), battery size (7AH or 33AH), and battery current draw (6 to 200 mA), see the cycles-per-day tables on page 23 of the manual. LiftMaster states that all numbers are estimates and actual results may vary.

Position and installation

The location of the panel(s) is critical to the success of the installation. In general, the panel(s) should be mounted using the provided angle bracket facing due south. The solar panel(s) should be mounted in an area clear of all obstructions and shade from buildings and trees. If the panel(s) is not casting a shadow, the battery is not being charged. Tall trees or buildings that do not shade the solar panel(s) in the summer could shade the solar panel(s) during the winter months when the sun sits lower in the sky. Solar panel(s) MUST be installed facing south; use a compass to determine direction. LiftMaster's general instructions (your installation may vary slightly depending on the solar panel purchased):

1. Position the mounting bracket on the mounting surface. Mark and drill holes.
2. Secure the solar panel to the mounting bracket using the hex bolts, hex nuts and washers provided.
3. Secure the solar panel to the mounting surface using lag screws provided.

Source: LiftMaster manual, 01-39383 revision B, page 24.

Power Wiring (Step 11)

LiftMaster's Step 11 shows how to wire the batteries and wire the solar panels in drawings on page 25 of the manual; this page does not reproduce them. The operator has no AC power connection (the main AC supply is listed as "N/A - Solar Only"). All control wiring used to connect external devices to Class 2 circuits of the operator must be (QPTZ) Power-Limited Circuit Cables, Type CL2, CL2P, CL2R, or CL2X or other cable with equivalent or better electrical, mechanical, and flammability ratings.

Source: LiftMaster manual, 01-39383 revision B, page 25.

Finish Installation (Step 12)

Source: LiftMaster manual, 01-39383 revision B, page 26.

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LiftMaster LA412UL Wiring

LiftMaster LA412UL Wiring Diagram

LiftMaster's installation manual shows the standard control box wiring diagram on page 47 (document 01-39383 revision B). This page does not reproduce the diagram; use the original LiftMaster manual for terminal-level connections. See Original LiftMaster Documentation.

Source: LiftMaster manual, 01-39383 revision B, page 47.

Wiring Accessories to the LA412UL Control Board

All control wiring used to connect external devices to Class 2 circuits of the operator must be (QPTZ) Power-Limited Circuit Cables, Type CL2, CL2P, CL2R, or CL2X or other cable with equivalent or better electrical, mechanical, and flammability ratings. LiftMaster describes these control board inputs and outputs (pages 34 and 35):

LA412UL control board inputs and outputs

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Entrapment protection devices are wired as described in Wiring entrapment protection devices (page 21). Per the specifications, the optional expansion board (Model K1D8387-1CC) adds inputs for additional entrapment protection devices and controls; see Accessories.

Source: LiftMaster manual, 01-39383 revision B, pages 34 to 35.

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LiftMaster LA412UL Adjustment

Limit and Force Adjustment

The operator is designed with electronic controls to make travel limit and force adjustments easy. The adjustments allow you to program where the gate will stop in the open and close position. The electronic controls sense the amount of force required to open and close the gate. The force is adjusted automatically when you program the limits but should be fine tuned using the REVERSAL FORCE dial on the control board to compensate for environmental changes. The limit setup LEDs (next to the SET OPEN and SET CLOSE buttons) indicate the status of the limits. The limits can be set using the control board or a remote control (see Limit Setup with a Remote Control); setting the limits with a remote control requires a 3-button remote control programmed to OPEN, CLOSE, and STOP. The TEST buttons on the control board will not work until the limits have been set and the required entrapment protection devices are installed.

LA412UL limit setup LEDs

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Source: LiftMaster manual, 01-39383 revision B, pages 26 to 27.

Adjust the limits. After both limits are set and the operator is ready to run, one limit can be adjusted independently from the other by following steps 1 to 3 of the initial limits and force adjustment procedure.

Source: LiftMaster manual, 01-39383 revision B, page 28.

Limit Setup with a Remote Control

To set the limits using a remote control, you first need a 3-button remote control that has been programmed for OPEN, CLOSE, and STOP (see How to Program a Remote Control). For dual gate applications the limits will have to be set for each operator. The gate MUST be attached to the operator before setting the limits and force. Ensure the gate is closed.

LiftMaster's page 45 also describes setting the open limit only in the same way, using the OPEN button; see the original manual.

Source: LiftMaster manual, 01-39383 revision B, page 45.

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LiftMaster LA412UL Programming

How to Program a Remote Control

A total of 50 Security+ 2.0 remote controls or KPW250 keypads and 2 keyless entries (1 PIN for each keyless entry) can be programmed to the operator. When programming a third keyless entry to the operator, the first keyless entry will be erased to allow the third keyless entry to be programmed. When the operator's memory is full it will exit the programming mode and the remote control will not be programmed; the memory will need to be erased before programming any additional remote controls. If installing an 86LM to extend the range of the remote controls DO NOT straighten the antenna.

There are 3 different options for programming the remote control, depending on how you would like the remote control to function:

Source: LiftMaster manual, 01-39383 revision B, page 29.

How to Connect the LA412UL to the LiftMaster Internet Gateway

The LiftMaster Internet Gateway is not provided. LiftMaster describes two ways to program the operator to the gateway.

Source: LiftMaster manual, 01-39383 revision B, page 30.

Constant Pressure Override and Erase Procedures

Constant Pressure Override (CPO)

Constant Pressure Override is for use with KPW5 and KPW250 keypads (not provided). The KPW5/KPW250 wireless commercial keypads are security keypads and can only be programmed to ONE gate operator (see the KPW5/KPW250 manual for complete programming instructions). The feature is intended to temporarily override a fault in the entrapment protection system, in order to operate the gate until the external entrapment protection device is realigned or repaired. Use the feature only in line of sight of the gate when no obstructions to travel are present. External entrapment protection devices include LiftMaster monitored photoelectric sensors and LiftMaster monitored wired and wireless edge sensors. Be sure to repair or replace these devices promptly if they are not working properly.

1. Enter a valid 4-digit PIN.
2. Press and hold # for 5 seconds to enter CPO. Continue to hold # to keep the operator in motion. A continuous tone will sound until the limit is met and/or # is released.
3. The operator will stop when either the operator reaches a limit or the user releases #.

Erase all codes

1. Press and release the LEARN button (operator will beep and green XMITTER LED will light).
2. Press and hold the LEARN button again until the green XMITTER LED flashes and then release the button (approximately 6 seconds). All remote control codes are now erased.

Erase limits

1. To erase the limits, press and hold the SET OPEN and SET CLOSE buttons simultaneously (5 seconds) until both the SET OPEN and SET CLOSE LEDs blink rapidly and the operator beeps.
2. Release the buttons and the SET OPEN and SET CLOSE LEDs will blink slowly, indicating the limits will need to be set.

Remove and erase monitored entrapment protection devices

1. Remove the entrapment protection device wires from the terminal block.
2. Press and release the SET OPEN and SET CLOSE buttons simultaneously. The SET OPEN and SET CLOSE LEDs will turn on (entering learn limit mode).
3. Press and release both the SET OPEN and SET CLOSE buttons again to turn off the SET OPEN and SET CLOSE LEDs (exiting learn limit mode).

Source: LiftMaster manual, 01-39383 revision B, page 30.

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LiftMaster LA412UL Operation

LA412UL Control Board Overview

LiftMaster identifies these control board features (numbers match the manual's callouts on page 31):

1. SET OPEN button: sets the OPEN limit (see Limit and Force Adjustment).
2. SET CLOSE button: sets the CLOSE limit.
3. MOVE GATE buttons: open or close the gate when the operator is in limit setting mode.
4. BATT FAIL: when AC power is OFF and battery voltage is critically low the gate will latch at a limit until AC power is restored or battery voltage increases. The option select switch set to OPEN forces the gate to automatically open and then latch at the OPEN limit until AC power is restored or battery voltage increases. The option select switch set to CLOSE forces the gate to latch at the CLOSE limit if at the CLOSE limit or on the next CLOSE command until AC power is restored or battery voltage increases. Constant pressure on a hard command input overrides to open or close the gate. Critically low battery is less than 23 V.
5. BIPART DELAY switch: the LOCK/BIPART DELAY switch is used only for dual gates (see Set the bipart delay).
6. LEARN button: used for programming remote controls and the network.
7. TIMER-TO-CLOSE (TTC) dial: can be set to automatically close the gate after a specified time period. The TTC is factory set to OFF. If the TTC is set to OFF, the gate will remain open until the operator receives another command from a control. Rotate the dial to the desired setting; the range is 0 to 180 seconds, and 0 seconds is OFF. Any radio command, single button control, or CLOSE command on the control board before the TTC expires will close the gate. The TTC is reset by any signals from the open controls, loops, close edges, and close photoelectric sensors (IRs).
8. REVERSAL FORCE dial: fine tunes the force (see fine tune the force).
9. TEST BUTTONS: operate the gate (OPEN, STOP and CLOSE).
10. STATUS LEDs: indicate the status of the operator (see the Control Board LEDs).
11. DIAGNOSTICS display: shows the operator type, firmware version, and codes. The operator type displays as "LA" followed by a "40", which indicates the operator type as LA412DC. The firmware version shows after the operator type (example "1.2"). See Diagnostic Codes.

Source: LiftMaster manual, 01-39383 revision B, page 31.

Manual Release

In case of a power failure, the operator can be disengaged from the gate. LiftMaster notes that the release action may sometimes feel stiff or jerky, which is normal and has no effect on function. It is also normal for the operator to run slow right after a disconnect or complete loss of AC/battery power (the operator will need to run a complete open and close cycle).

Use the manual release ONLY when the gate is not moving.

Source: LiftMaster manual, 01-39383 revision B, page 32.

LA412UL Reset Button

The reset button is located on the side of the control box and serves several functions (LiftMaster, page 32):

• Press the reset button to stop a moving gate during a normal open/close cycle, like a stop button.
• Press the reset button once while the gate is in the open position to disable the Timer-to-Close. The gate will stay in the open position. To restart the Timer-to-Close, either press the reset button or activate the gate with a programmed remote control.
• Press the reset button to shut off the alarm and reset the operator.

Source: LiftMaster manual, 01-39383 revision B, page 32.

Party Mode

Press the reset button once while the gate is in the open position to disable the Timer-to-Close; the gate will stay in the open position. To restart the Timer-to-Close, either press the reset button or activate the gate with a programmed remote control. Party mode can also be enabled from a KPW5 or KPW250 keypad (not provided):

1. Enter a valid 4-digit PIN when the gate is at the open limit and the timer is running.
2. The operator will chirp, indicating the timer is canceled.

To restart the gate, either re-enter the 4-digit PIN or activate a hard input or a programmed remote.

Source: LiftMaster manual, 01-39383 revision B, page 32.

LA412UL Operator Alarm

If a contact sensor detects an obstruction twice consecutively, the alarm will sound (up to 5 minutes) and the operator will need to be reset. When the inherent force of the operator (RPM/current sensor) detects any of the following twice consecutively, the alarm will sound (up to 5 minutes) and the operator will need to be reset:

• The operator arm or gate is incorrectly installed.
• The gate does not meet specifications.
• Gate hinges are too tight or broken and the gate is not moving freely.
• The gate is moving and a car pushes the gate.
• A foreign object is on the gate frame while the gate is moving.
• The gate hits the driveway or curb and gets stuck or bent in an awkward position.

1. Remove any obstructions.
2. Press the reset button to shut off the alarm and reset the operator.

After the operator is reset, normal functions will resume. The operator alarm will beep 3 times with a command if the battery is low (see battery problems).

Source: LiftMaster manual, 01-39383 revision B, page 33.

LA412UL Remote Control Operation

Single button control (SBC) functionality. Once the remote control has been programmed, the operator will operate as follows: when the gate is in the closed position, activation of the remote control button will open the gate. During the open cycle another activation of the remote control will stop the gate and the next activation of the remote control will close the gate. When the gate is in the open position, activation of the remote control button will close the gate. If the remote control is activated while the gate is closing, the gate will stop and the next activation will open the gate. See How to Program a Remote Control for the other programming options.

Source: LiftMaster manual, 01-39383 revision B, page 33.

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LiftMaster LA412UL Troubleshooting

This section follows the troubleshooting chart in LiftMaster's LA412UL installation manual (document 01-39383 revision B). The full chart below keeps LiftMaster's wording; the problem-specific sections after it restate rows of the chart in task order and are condensed. Disconnect power (AC or solar and battery) before servicing the operator, and replace a fuse only with one of the same type and rating.

• Gate will not open or does not move
• Gate opens but will not close
• Operator has no power
• Remote control does not operate the gate
• Safety device problems
• Battery and solar problems
• Complete troubleshooting chart (30 symptoms)
• Control board LEDs

LiftMaster LA412UL Troubleshooting Chart

LiftMaster LA412UL troubleshooting chart (letters in each row correspond except where the documentation note says otherwise)

Swipe sideways to see all columns.

Source: LiftMaster manual, 01-39383 revision B, pages 38 to 40.

Gate Will Not Open or the LiftMaster LA412UL Does Not Move

If a LiftMaster LA412UL gate will not open or the operator does not move, LiftMaster's troubleshooting chart separates several conditions. Find the one that matches what you see.

The control board powers up, but the motor does not run

LiftMaster lists these possible causes and checks (chart row):

• Reset switch is stuck: Check reset switch.
• Stop button active or jumper not in place for stop circuit: Check Stop button is not "stuck on", or verify that the stop button is a normally closed circuit, or put a jumper on the stop circuit.
• If on battery power only, low or dead batteries: Charges batteries by AC or solar power or replace batteries.
• Open or Close input active: Check all Open and Close inputs for a "stuck on" input.
• Entrapment Protection Device active: Check all Entrapment Protection Device inputs for a "stuck on" sensor.
• Vehicle loop detector or probe active: Check all vehicle detector inputs for a "stuck on" detector.
• Defective control board: Replace defective control board.

The gate closes but will not open

LiftMaster lists these possible causes and checks (chart row):

• Vehicle loop detector active: Check all vehicle detector inputs for an active detector.
• Low battery with LOW BATT option set to CLOSE: Check if AC power is available. If no AC power, then running on batteries and battery voltage must be 23.0 Vdc or higher. Charge batteries by AC or solar power or replace batteries.

The operator does not respond to a command

For wired controls such as Open, Close, or SBC, see the chart row. For remotes and transmitters, see remote control problems.

The arm moves but limits cannot be set correctly

See the chart row for "cannot set correct limits" and the chart row for "does not fully open or fully close when setting limits." See Limit and Force Adjustment.

The gate stops during travel and reverses immediately

LiftMaster lists these possible causes and checks (chart row):

• Control (Open, Close) becoming active: Check all Open and Close inputs for an active input.
• Vehicle loop detector active: Check all vehicle detector inputs for an active detector.
• Low battery voltage: Battery voltage must be 23.0 Vdc or higher. Charge batteries by AC or solar power or replace batteries.

Source: LiftMaster manual, 01-39383 revision B, pages 38 to 39.

Gate Opens but Will Not Close on the LiftMaster LA412UL

For a gate that opens but will not close with a transmitter or the Timer-to-Close, LiftMaster's chart (chart row) prints its causes and actions as two separate lists:

Possible causes (as printed):

1. Open control active
2. Vehicle loop detector active
3. Fire Dept input active
4. Timer-to-Close not set
5. Close Entrapment Protection Device active

Recommended actions (as printed):

1. Check all Open inputs for an active input
2. Check all vehicle detector inputs for an active detector
3. Check AC power and AC Fail option setting
4. Check if AC power is available. If no AC power, then running on batteries and battery voltage must be 23.0 Vdc or higher. Charge batteries by AC or solar power or replace batteries.
5. Check Fire Dept input
6. Check Timer-to-Close (TTC) setting
7. Check all Entrapment Protection Device inputs for an active sensor

If the display shows a code, see code 60 and codes 61 to 66 and 70 to 75 for entrapment protection inputs. LiftMaster's chart also has rows for an exit loop that does not open the gate, an interrupt loop that does not stop and reverse the gate, and a shadow loop that does not keep the gate at the open limit.

Source: LiftMaster manual, 01-39383 revision B, page 39.

LiftMaster LA412UL Has No Power or the Display Is Off

If the LiftMaster LA412UL does not run and the diagnostic display is not on, LiftMaster lists these possible causes and checks (chart row):

1. No power to control board: Check AC and battery power.
2. Open fuse: Check fuses.
3. If on battery power only, low or dead batteries: Charge batteries by AC or solar power or replace batteries.
4. Defective control board: Replace defective control board.

For battery connections see Batteries. Related codes in LiftMaster's table include code 53 and code 54.

Source: LiftMaster manual, 01-39383 revision B, page 38.

LiftMaster LA412UL Remote Control Does Not Operate the Gate

For a wireless control or transmitter that does not operate a LiftMaster LA412UL gate, LiftMaster lists these causes and checks (chart row):

1. Check XMITTER LED when wireless control is active: Activate wireless control and check XMITTER LED is on. Re-learn wireless control/transmitter to control board. Replace wireless control as needed.
2. Stop button is active: Check Stop button is not "stuck on".
3. Reset button is stuck: Check Reset button.
4. Poor radio reception: Check if similar wired control operates correctly. Check if wireless controls works properly when within a few feet of operator. Check operator's antenna and antenna wire. Check other wireless controls or devices.

To re-learn a remote, see How to Program a Remote Control. If the operator's memory is full, LiftMaster notes that the memory must be erased before more remote controls can be programmed (Erase All Codes).

Source: LiftMaster manual, 01-39383 revision B, page 38.

LiftMaster LA412UL Safety Device Problems

LiftMaster's chart covers these safety device symptoms:

• Photoelectric sensor does not stop or reverse the gate (row): Incorrect photoelectric sensor wiring: Check photoelectric sensor wiring. Retest that obstructing photoelectric sensor causes moving gate to stop, and may reverse direction. Defective photoelectric sensor: Replace defective photoelectric sensor. Retest that obstructing photoelectric sensor causes moving gate to stop, and may reverse direction.
• Edge sensor does not stop or reverse the gate (row): Incorrect edge sensor wiring: Check edge sensor wiring. Retest that activating edge sensor causes moving gate to stop and reverse direction. Defective edge sensor: Replace defective edge sensor. Retest that activating edge sensor causes moving gate to stop and reverse direction.
• Obstruction does not cause the gate to stop and reverse (row): Force adjustment needed: Refer to the Adjustment section to conduct the obstruction test and perform the proper force adjustment that is needed.
• Alarm sounds for 5 minutes or with a command (row): Double entrapment occurred (two obstructions within a single activation): Check for cause of entrapment (obstruction) detection and correct. Press the reset button to shut off alarm and reset the operator.
• Expansion board function not controlling the gate (row): Defective main board to expansionboard wiring: Check main board to expansion board wiring. If required, replace wire cable. Incorrect input wiring to expansion board: Check wiring to all inputs on expansion board. Defective expansion board or defective main board: Replace defective expansion board or defective main board.

Source: LiftMaster manual, 01-39383 revision B, pages 39 to 40.

LiftMaster LA412UL Battery and Solar Problems

The operator alarm beeps 3 times with a command when the battery is low (see chart row). Critically low battery is less than 23 V (see BATT FAIL). For solar operators, LiftMaster's chart has two rows:

• Alarm beeps three times with a command (row): Low battery: Check if AC power is available. If no AC power, then running on batteries and battery voltage must be 23.0 Vdc or higher. Charge batteries by AC or solar power or replace batteries.
• Solar operator not getting enough cycles per day (row): Insufficient panel wattage: Add more solar panels. Excessive accessory power draw: Reduce the accessory power draw by using LiftMaster low power accessories. Old batteries: Replace batteries. Solar panels are not getting enough sunlight: Relocate the solar panels away from obstructions (trees, buildings, etc.).
• Solar operator, insufficient standby time (row): Insufficient panel wattage: Add more solar panels. Excessive accessory power draw: Reduce the accessory power draw by using LiftMaster low power accessories. Battery capacity too low: Use batteries with higher amp hour (AH) rating.

Source: LiftMaster manual, 01-39383 revision B, pages 39 to 40.

LA412UL Control Board LEDs

LA412UL control board status LEDs

Swipe sideways to see all columns.

LA412UL control board input LEDs

Swipe sideways to see all columns.

Source: LiftMaster manual, 01-39383 revision B, page 37.

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LiftMaster LA412UL Diagnostic and Error Codes

The LiftMaster LA412UL control board shows diagnostic codes on its display. Some codes are saved in the code history and some are not; a code that is not saved briefly appears on the display as it occurs, then disappears. When cycling or disconnecting power (AC/DC) to the control board, LiftMaster recommends unplugging the J15 plug.

How to Read LA412UL Diagnostic Codes

Source: LiftMaster manual, 01-39383 revision B, page 34.

LiftMaster LA412UL Diagnostic Code Table

Each code below has its own anchor (for example code 60). The wording is LiftMaster's. LiftMaster's table is color-coded by category (LiftMaster system, installed system, informational, external entrapment protection, inherent entrapment protection); see the original table for the color key. The manual groups several codes that share one solution; they are listed separately here.

• 31
• 32
• 33
• 35
• 36
• 37
• 38
• 39
• 40
• 41
• 42
• 43
• 44
• 45
• 46
• 51
• 52
• 53
• 54
• 60
• 61
• 62
• 63
• 64
• 65
• 66
• 67
• 68
• 69
• 70
• 71
• 72
• 73
• 74
• 75
• 80
• 81
• 82
• 83
• 84
• 91
• 92
• 93
• 94
• 99

LiftMaster LA412UL diagnostic codes (display shows 31 to 99; code 00 is listed in the manual table)

Swipe sideways to see all columns.

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LiftMaster LA412UL Maintenance

LiftMaster's maintenance instructions for the LA412UL are on page 36 of the manual (document 01-39383 revision B). Disconnect all power (AC, solar, battery) to the operator before servicing. The operator's AC power switch ONLY turns off AC power to the control board and DOES NOT turn off battery power. ALWAYS disconnect the batteries to service the operator.

Important Safety Instructions

Source: LiftMaster manual, 01-39383 revision B, page 36.

Maintenance Chart

LiftMaster LA412UL maintenance chart: check at least once every month, 6 months, or 3 years

Swipe sideways to see all columns.

LiftMaster's notes: severe or high cycle usage will require more frequent maintenance checks. It is suggested that while at the site, voltage readings be taken at the operator. Using a digital voltmeter, verify that the incoming voltage to the operator is within ten percent of the operator's rating.

Batteries

Batteries will degrade over time depending on temperature and usage. The operator alarm will beep 3 times with a command if the battery is low. Batteries do not perform well in extremely cold temperatures. For best performance, the batteries should be replaced every 3 years. Use only LiftMaster part 29-NP712 for replacement batteries. The batteries contain lead and need to be disposed of properly. Two 33AH batteries (A12330SGLPK) may be used in place of the 7AH batteries for a large metal control box solar installation; a battery tray (K10-36183) and battery harness (K94-37236) are required for 33AH applications. Shop gate operator batteries.

Source: LiftMaster manual, 01-39383 revision B, page 36.

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LiftMaster LA412UL Repair and Replacement Parts

The tables below list the LA412UL repair parts and part numbers as printed by LiftMaster on page 46 of manual 01-39383 revision B: the standard control box (items 1 to 7) and the gate operator arm (items 1 to 5), with the parts LiftMaster lists as "not shown."

Browse by category: gate operator parts | control boards | motors | batteries | gate operator accessories

LiftMaster LA412UL repair parts as listed by LiftMaster (page 47)

Swipe sideways to see all columns.

Additional LA412UL parts listed by LiftMaster as "not shown" in the diagram (page 47)

Swipe sideways to see all columns.

Source: LiftMaster manual, 01-39383 revision B, page 46.

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Compatible LA412UL Accessories

LiftMaster's manual lists the following accessories for the LA412UL (pages 49 to 50). Model numbers are LiftMaster's; the links go to related All Security Equipment categories and do not by themselves confirm that we stock an item or that it fits your operator.

Entrapment Protection Devices

LiftMaster monitored devices are required for UL 325 entrapment protection (see Installing Entrapment Protection Devices). Shop photoelectric sensors and edge sensors.

• LMTBUL and LMTBU, monitored through beam photoelectric sensors
• LMRRUL and LMRRU, monitored retro-reflective photoelectric sensors
• CPS-UN4 and CPSUN4G, LiftMaster Monitored Commercial Protector System
• LMWEKITU, monitored wireless edge kit (transmitter and receiver)
• LMWETXU, monitored wireless edge transmitter
• L50 (large profile monitored edge, 82 ft. roll) and L50E (ends kit, 10 pair)
• S50 (small profile monitored edge, 82 ft. roll) and S50E (ends kit, 10 pair)
• L50CHP (plastic channel, 8 ft., pack of 10) and L50CHAL (aluminum channel, 10 ft., pack of 8)
• L504AL, L505AL, L506AL (large profile monitored edges, 4, 5, 6 ft.)
• S504AL, S505AL, S506AL (small profile monitored edges, 4, 5, 6 ft.)
• ETOOL, edge cutting tool

Remote Controls and Access Devices

LiftMaster's remote controls are compatible with operators manufactured by LiftMaster after 1993. Shop gate remote controls and keypads.

• 893MAX, 3-button remote control (includes visor clip)
• 890MAX, 3-button mini-remote control (includes key ring and fastening strip)
• 892LT and 894LT, Security+ 2.0 learning remote controls
• 877MAX, keyless entry (4-digit code keypad)
• KPW250, wireless commercial keypad (Security+ 2.0 compatible)
• STAR1000, commercial access control receiver (up to 1,000 devices)
• 86LM, remote antenna extension kit
• CAPXL, LiftMaster Cloud connected access protocol, high capacity

Operator Accessories

• LOOPDETLM, plug-in loop detector (low power; plugs into the existing control board). Search for LOOPDETLM or browse loop detectors.
• LD7LP, low power loop detector mounted and wired separately inside the control box
• CP3, vehicle sensing probe
• 50-19503, push-to-open bracket (used to allow the gate operator to push the gate open)
• MG1300, outdoor magnetic lock with transformer, junction box, mounting plate and hardware (not for use with solar applications; must be powered separately). Shop magnetic locks.
• APOW3, transformer
• K1D8387-1CC, expansion board (additional programming features including external loops, plug-in loops, auxiliary relays, and inputs for additional controls and entrapment protection devices)
• K94-34778, wire harness between the main control board and the expansion board
• SP10W12V (10 Watt, 12V) and SP20W12V (20 Watt, 12V), solar panel kit (60W maximum for 24 Vdc operators and 30W maximum for 12 Vdc operators; requires a 33AH battery harness). Browse solar panels and accessories.
• 40-39235, warning sign

Batteries and Battery Hardware

• 29-NP712, standard 7AH 12 Vdc battery (reuse existing harnesses)
• A12330SGLPK, upgrade 33AH 12 Vdc battery (ideal for solar applications and extended battery backup; for use with the large metal control box only)
• K10-36183, battery tray (required for 33AH applications)
• K94-37236, universal solar wire harness kit (for 7AH and 33AH applications). Search for K94-37236.

Two identical 12 Vdc batteries are required for each gate operator. Do not mix 7AH and 33AH batteries within a gate operator. Shop gate operator batteries.

Source: LiftMaster manual, 01-39383 revision B, pages 49 to 50.

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Frequently Asked Questions About the LiftMaster LA412UL

What size gate can the LA412UL move?

Per the manual (page 7), the maximum gate weight depends on gate length: 850 lbs. (385.6 kg) at 10 ft (3.0 m), 750 lbs. (340.2 kg) at 12 ft (3.7 m), 650 lbs. (294.8 kg) at 14 ft (4.3 m), and 550 lbs. (249.5 kg) at 16 ft (4.9 m). The 90 degree travel time is under 23 seconds, the maximum travel range is 115 degrees, and the maximum daily cycle rate is 50 cycles per day. See Specifications.

How do I set the limits?

With the GATE switch on 1, press SET OPEN and SET CLOSE together to enter limit setting mode, move the gate with the MOVE GATE buttons and press SET OPEN or SET CLOSE at each limit, then cycle the gate with the TEST BUTTONS to set the force (pages 26 and 27). Limits can also be set with a 3-button remote control (page 45). See Limit and Force Adjustment.

How do I open the gate by hand?

Insert the key, turn it 180° counter-clockwise, then turn the release lever 180° counter-clockwise. To engage again, turn the release lever and then the key 180° clockwise. Use the release only when the gate is not moving. See Manual Release.

What entrapment protection does the LA412UL need?

Per the manual, a minimum of two independent monitored entrapment protection devices are required at each entrapment zone; the inherent device built into the operator serves as one of the two, and swing gate operators require the first external monitored device to function. The installer must protect ALL entrapment zones in both the open and close cycles (pages 3 and 20). See Installing Entrapment Protection Devices.

What batteries does the LA412UL use?

LiftMaster says to use only part 29-NP712 for replacement batteries and recommends replacing them every 3 years. The standard control box uses 7AH batteries; two 33AH batteries (A12330SGLPK) with a battery tray (K10-36183) and battery harness (K94-37236) may be used in a large metal control box solar installation (page 36). See Batteries and Install Solar Panels.

Does the LA412UL run on AC power?

No. The manual lists the main AC supply as "N/A - Solar Only." The operator runs on 12 Vdc batteries charged by solar panels (30 watts maximum). See Install Solar Panels and Specifications.

What warranty does the LA412UL have?

Per the manual, LiftMaster's warranty is a two year limited warranty from the date of purchase. The warranty terms, including exclusions, are printed on page 51 of the manual.

Where is the wiring diagram?

The standard control box wiring diagram is on page 47 and the large metal control box wiring diagram is on page 48 of LiftMaster's installation manual. See the wiring diagram section.

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Original LiftMaster LA412UL Documentation

This HTML resource is presented by All Security Equipment, is not a LiftMaster publication, and does not replace the original manufacturer documentation. It is based on LiftMaster's LA412UL installation manual, document 01-39383, revision B (© 2018 The Chamberlain Group, Inc.), which covers the LA412PKGUL, LA412DC, and LA412DCS.

• LiftMaster LA412PKGUL single gate kit and LiftMaster LA412PKGUL dual gate kit at All Security Equipment, with the product literature.

Check the product page for the current revision before relying on any document, because LiftMaster may update them.

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Related LiftMaster Resources

• LiftMaster LA412PKGUL single gate kit and dual gate kit at All Security Equipment
• Swing gate openers and operators and LiftMaster products
• Gate operator parts, gate operator accessories, and battery back-ups
• Gate operator articles and the Help Center

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