LiftMaster HDSL24UL Instruction Manual

This page presents the LiftMaster HDSL24UL commercial DC vehicular slide gate operator installation manual as searchable, linkable HTML: specifications, safety requirements, installation, wiring, programming, troubleshooting, diagnostic codes, maintenance, and replacement parts.

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

LiftMaster HDSL24UL Manual Overview

The LiftMaster HDSL24UL is a 24 Vdc commercial slide gate operator. LiftMaster's installation manual (document 114-5331-000) states that the product is for use on vehicular passage gates only, is not intended for pedestrian passage gates, and is intended for Class I, II, III, and IV vehicular slide gate applications. It is compatible with myQ and Security+ 2.0 accessories. LiftMaster also states that the product must be installed and serviced in accordance with the manual by a trained gate systems technician only, and that external safety devices are required (see UL 325 entrapment protection requirements).

Source: LiftMaster manual, 114-5331-000E, cover page.

What Is in the HDSL24UL Carton

LiftMaster lists the following items in the HDSL24UL carton:

• Operator and cover
• LiftMaster Monitored Retro-Reflective Photoelectric Sensor, Model LMRRUL (1)
• 5 ft. Edge Sensor Kit, Model S505AL (1)
• Warning signs (2)
• Installation manual
• Key (2)
• Battery, 12 Vdc 7AH (2)

Not shown in LiftMaster's carton illustration: documentation packet, #40 chain (30 feet) with #40 master link, and eye bolt kit.

Source: LiftMaster manual, 114-5331-000E, page 6.

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LiftMaster HDSL24UL Specifications

The following specifications are from the Operator Specifications table in LiftMaster's HDSL24UL installation manual.

LiftMaster HDSL24UL operator specifications

Swipe sideways to see all columns.

Source: LiftMaster manual, 114-5331-000E, page 7.

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Important Safety Information

This section reproduces the safety requirements that LiftMaster places at the front of the HDSL24UL manual. Safety text is kept close to the manufacturer's wording on purpose.

Safety Symbols and Who Should Service the HDSL24UL

LiftMaster uses safety symbols and signal words to alert you to the possibility of serious injury or death if the accompanying warnings are not followed. The hazard may be mechanical or electrical. A separate signal word alerts you to possible damage to the gate or the gate operator.

Source: LiftMaster manual, 114-5331-000E, page 2.

Gate Operator Usage Classes

The LiftMaster HDSL24UL is rated for all four UL 325 usage classes. LiftMaster defines them as follows:

• Class I, Residential Vehicular Gate Operator: 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: 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: 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: 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, 114-5331-000E, page 3.

UL 325 Entrapment Protection Requirements for the HDSL24UL

Definitions (LiftMaster)

• Entrapment: the condition when a person is caught or held in a position that increases the risk of injury.
• Slide gate entrapment zone: an entrapment zone exists if at any point during travel, the gap between the gate and any opposing fixed edge or surface such as posts, walls, pillars, columns or the operator itself, is less than 16 in. (406 mm) in a location up to 6 ft. (1.8 m) above grade.
• Independent monitored entrapment protection device: an entrapment protection device is independent if it is a different type (photoelectric sensors, edge device, inherent protection device) from the other devices in the same entrapment zone.

Use the Site Planning Safety Checklist to identify the entrapment zones found in your installation (see the official LiftMaster Gate Safety Checklist).

Source: LiftMaster manual, 114-5331-000E, page 3.

Safety Installation Information

LiftMaster lists the following items as safety installation information for vehicular slide gate systems:

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 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 gate system design. Specific safety features include: edge sensors (contact), guards for exposed rollers, photoelectric sensors, screen mesh, 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 openings of a horizontal slide gate are guarded or screened from the bottom of the gate to a minimum of 6 feet (1.8 m) above the ground to prevent a 2-1/4 inches (6 cm) diameter sphere from passing through the openings anywhere in the gate, and in that portion of the adjacent fence that the gate covers in the open position; (c) all exposed pinch points are eliminated or guarded, and guarding is supplied for exposed rollers.
5. The gate 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 pedestrian access 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.
7. The gate must be properly installed and work freely in both directions prior to the installation of the gate operator.
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. For a gate operator utilizing a Stop and/or Reset button, it 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 warning sign is to be visible by persons located on the side of the gate on which the sign is installed.
11. For a gate operator utilizing a non-contact sensor: (a) see the Install Entrapment Protection section for placement of the non-contact sensor for each type of application; (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, such as at the leading edge, trailing edge and post mounted both inside and outside of a vehicular horizontal slide gate; (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 are not obstructed or impeded by building structures, natural landscaping or similar obstruction, and shall function under the intended end-use conditions.

Source: LiftMaster manual, 114-5331-000E, page 4.

Role of Dealers, Installers, and End Users

Dealers, installers, and trained gate system technicians (LiftMaster):

• Ensure the entire system being designed, manufactured, and installed meets all applicable standards and codes including UL 325 and ASTM F2200.
• Demonstrate the basic functions and safety features of the gate system to owners, end users, and general contractors, including how to turn off power and how to operate the manual disconnect feature.
• Leave safety instructions, product literature, installation manual and maintenance manual with end user.
• Explain to the owners the importance of testing by a trained gate system technician that includes a routine re-testing of the entire system including the entrapment protection devices, and explain the need for the owners to ensure that this testing is performed monthly.

End users and homeowners (LiftMaster):

• Contact a trained gate systems technician to maintain and repair the gate system. End users should never attempt to repair the gate system.
• Retain and utilize the installation manual and maintenance and important safety instructions.
• Routinely check all gate operator functions and gate movement.
• Discontinue use if safety systems operate improperly, the gate is damaged, or the gate is difficult to move. Contact a trained gate systems technician to repair the gate system.
• Prominently display and maintain warning signs on both sides of the gate.

Source: LiftMaster manual, 114-5331-000E, 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. The manual lists these provisions:

General requirements

• Gates shall be constructed in accordance with the provisions given for the appropriate gate type.
• 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.
• Gates shall have smooth bottom edges, with vertical bottom edged protrusions not exceeding 0.50 inches (12.7 mm) other than the exceptions listed in ASTM F2200.
• 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.
• An existing gate latch shall be disabled when a manually operated gate is retrofitted with a powered gate operator. A gate latch shall not be installed on an automatically operated gate.
• Protrusions shall not be permitted on any gate (see ASTM F2200 for exceptions).
• Gates shall be designed, constructed and installed such that their movement shall not be initiated by gravity when an automatic operator is disconnected. A vehicular horizontal slide gate shall not result in continuous, unimpeded movement in either lineal direction of its travel.
• For pedestrian access in the vicinity of an automated vehicular gate, a separate pedestrian access shall be provided or available, located so that a pedestrian does not come in contact with a moving vehicular access gate during the entire path of travel. A pedestrian gate shall not be incorporated into an automated vehicular gate panel.

Vehicular horizontal slide gates, Class I, II and III

• All weight bearing exposed rollers 8 feet (2.44 m) or less above grade shall be guarded or covered.
• All openings shall be designed, guarded, or screened from the bottom of the gate to the top of the gate or a minimum of 6 ft. (1.83 m) above grade, whichever is less, to prevent a 2-1/4 in. (57 mm) diameter sphere from passing through the openings anywhere in the gate, and in that portion of the adjacent fence that the gate covers in the open position. The gate panel includes the entire section of the moving gate, including any back frame or counterbalance portion.
• A gap, measured in the horizontal plane parallel to the roadway, between a fixed stationary object nearest the roadway (such as a gate support post) and the gate frame when the gate is in either the fully open position or the fully closed position, shall not exceed 2-1/4 inches (57 mm). Exception: all other fixed stationary objects greater than 16 in. (406 mm) from the gate frame are not required to comply.
• Positive stops shall be required to limit travel to the designed fully open and fully closed positions, installed at either the top of the gate or the bottom of the gate, projecting horizontally or vertically no more than required to perform their intended function.
• All gates shall be designed with sufficient lateral stability to assure that the gate will enter a receiver guide.

Vehicular horizontal slide gates, Class IV

• All weight bearing exposed rollers 8 feet (2.44 m) or less above grade shall be guarded or covered.
• Positive stops shall be required to limit travel to the designed fully open and fully closed positions.

Specific applications: any non-automated gate to be automated shall be upgraded to conform to ASTM F2200; the specification does not apply to gates generally used for pedestrian access or to vehicular gates not to be automated; when the gate operator or the gate of an automated system is replaced, the existing or new gate shall conform to ASTM F2200.

Source: LiftMaster manual, 114-5331-000E, page 5.

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LiftMaster HDSL24UL Installation

LiftMaster presents HDSL24UL installation as ten 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, Determine location for operator
2. Step 2, Install the operator
3. Step 3, Attach the chain
4. Step 4, Install entrapment protection
5. Step 5, Earth ground rod
6. Step 6, Power wiring
7. Step 7, Connect batteries
8. Step 8, Dual gate setup
9. Step 9, Install the cover
10. Step 10, Install warning signs

After Step 10, LiftMaster states that the basic installation is complete and continues with limit and force adjustment and the obstruction test.

Installation Requirements

Before installing the LiftMaster HDSL24UL, LiftMaster requires that the gate be properly installed and work freely in both directions, that the gate meet ASTM F2200 construction requirements and fit the operator's specifications, and that national and local building codes be checked. See Gate Construction Requirements and Specifications.

LiftMaster describes two layouts:

• Standard installation: the operator is installed near the front roller of the gate.
• Rear installation: the operator is installed near the back of the gate in the OPEN position. This layout requires two extra idler pulleys.

Source: LiftMaster manual, 114-5331-000E, page 9.

Site Preparation

Check the national and local building codes BEFORE installation. Refer also to the Site Planning Safety Checklist in the Appendix.

• Conduit and concrete pad: trench and install conduit. Before trenching, contact underground utility locating companies. Conduit must be UL approved for low and high voltage. Consider the operator placement BEFORE installing the pad or post.
• Gate: the gate must be constructed and installed according to ASTM F2200 standards and must fit the operator's specifications.
• Vehicle loops: the 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. Vehicle loops are not required but are recommended. Before installing access control devices, complete a site survey and determine the best device for your site needs.
• Warning signs: install a warning sign (two provided) on the inside and outside of the property, where easily visible.

Source: LiftMaster manual, 114-5331-000E, page 8.

Mounting the LiftMaster HDSL24UL (Steps 1 and 2)

These steps locate and pour the concrete pad and attach the HDSL24UL to it. Check national and local building codes before installation.

LiftMaster's layout drawings show the pad 6 inches (15.2 cm) above ground and below the frost line (check all national and local codes), with the gate 1 to 2 inches (2.5 to 5.1 cm) from the pad and a 1/2 inch (1.8 cm) dimension at the front gate roller. See the original drawing on page 10 for exact placement relative to the gate and conduit.

Source: LiftMaster manual, 114-5331-000E, page 10.

Source: LiftMaster manual, 114-5331-000E, page 11.

Installing the Drive Chain (Step 3)

Source: LiftMaster manual, 114-5331-000E, page 12.

Source: LiftMaster manual, 114-5331-000E, page 13.

To tighten the chain after it has stretched, see Drive Chain maintenance.

Installing Entrapment Protection Devices on the HDSL24UL (Step 4)

Install entrapment protection devices according to the UL 325 requirements in this section, and use the Site Planning Safety Checklist to identify the entrapment zones that will result from the installation.

LiftMaster's illustration (credited to the DASMA Gate Systems Safety Guide) shows an example site with photoelectric sensors in the open and close directions, edge sensors, interior posts and non-pinch rollers, a requirement that the gap between vertical bars be less than 2-1/4 in. (57 mm), and a separate pedestrian entrance. LiftMaster notes that any gap larger than 2-1/4 in. (57 mm) between the gate and fixed objects MUST be protected, that edge sensors should be installed where the gap between the post and gate creates an entrapment zone, that the example is for illustration only and your site may have additional entrapment zones which MUST be protected, and that you should take a photograph of the complete installation site for your records.

Source: LiftMaster manual, 114-5331-000E, page 15.

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. Board inputs for entrapment protection devices are yellow.

HDSL24UL entrapment protection inputs

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Source: LiftMaster manual, 114-5331-000E, page 16.

Earth Ground Rod (Step 5)

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 should 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.

Note from LiftMaster: if the operator is not grounded properly the range of the remote controls will be reduced and the operator will be more susceptible to lightning and surge damage. Check national and local codes for proper depth.

Source: LiftMaster manual, 114-5331-000E, page 17.

Electrical and Power Connections (Step 6)

The LiftMaster HDSL24UL can be wired for either 120 Vac or 240 Vac, or for a solar panel (not provided). An optional Transformer Kit (Model 3PHCONV) can be used to change the input voltage (208/240/480/575 Vac) to an output voltage of 120 Vac. For dual gate applications, power must be connected to each operator, and main power supply and control wiring MUST be run in separate conduits. For solar applications, see Solar Power Connections. If using an external receiver, use shielded wire for the connections and mount the receiver away from the operator to avoid interference from the operator.

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.

HDSL24UL maximum wire length in feet, AC power wiring

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Chart assumes copper wire, 65°C, 5% drop. LiftMaster notes that the accessory power outlets are rated at 1 amp when the 3PHCONV kit is used. If using an external receiver, use shielded wire for the connections and mount the receiver away from the operator to avoid interference from the operator.

Source: LiftMaster manual, 114-5331-000E, page 17.

AC power switch and battery switch (LiftMaster): the AC switch on the operator turns the incoming 120/240 Vac power ON or OFF. The AC switch ONLY turns off AC power to the control board and DOES NOT turn off battery power. The battery switch turns the battery power on or off.

Source: LiftMaster manual, 114-5331-000E, pages 17 to 18.

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. Use only the same operator models in a dual gate setup. Wired dual gate applications will have a longer battery standby time than wireless applications. LiftMaster recommends that all accessories, except entrapment protection devices, and board configurations are set on the primary operator.

Source: LiftMaster manual, 114-5331-000E, page 20.

Bipart delay and synchronized close

The BIPART DELAY switch is used only with dual gate applications and serves two functions. For the bipart delay function, LiftMaster states that it is not applicable for slide gate applications. For synchronized close, used where one gate travels a longer distance than the other, set the BIPART DELAY switch to ON for both operators to synchronize the closing of the gates.

Source: LiftMaster manual, 114-5331-000E, page 21.

Install the Cover (Step 9)

Before installing the cover, follow the instructions in the Adjustment section to adjust the limits, speed, and force.

Source: LiftMaster manual, 114-5331-000E, page 22.

Install Warning Signs (Step 10)

Installers MUST install the UL required warning signs. The signs MUST be installed in plain view on both sides of each gate installed. Use the fastening holes in each corner to permanently secure the sign. LiftMaster states that the basic installation is then complete.

Source: LiftMaster manual, 114-5331-000E, page 22.

Installation Testing

After installing the operator, LiftMaster requires testing of ALL entrapment protection devices (per the manual provided with each device) and testing of the inherent entrapment protection with the obstruction test below. LiftMaster also requires that the gate operator be tested monthly, and again after any adjustment of force or travel limits.

Source: LiftMaster manual, 114-5331-000E, page 25.

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LiftMaster HDSL24UL Wiring

Source: LiftMaster manual, 114-5331-000E, pages 17 and 55.

LiftMaster HDSL24UL Wiring Diagram

The HDSL24UL wiring diagram is on page 55 of LiftMaster's installation manual (document 114-5331-000E). LiftMaster also publishes a combined HDSL24UL, HDSW24UL wiring diagram (01-39240-13). This page does not reproduce the diagram; use the original LiftMaster document for terminal-level connections.

Open the LiftMaster manual (wiring diagram on page 55)

The page 55 wiring diagram shows the following components and connections:

• Control board with antenna, expansion board, and relay adapter board (auxiliary relays)
• EMI board with the input power connection, AC power switch, and battery switch, plus the HD power board, bridge rectifier, and transformer
• Two 12 V batteries in series (part 29-NP712) and optional 12 V solar panels in series
• BLDC motor and motor drive, APS encoder, product ID, alarm, and the reset switch
• Field wiring for OPEN, CLOSE, and STOP controls (line-of-sight hard commands), the EXIT input (soft open), a 3-button control station and a single button control station, photoelectric sensors and edge sensors for the CLOSE and OPEN cycles, and the wireless edge receiver
• Exit, shadow, and interrupt loop wiring, the plug-in loop detector (Model LOOPDETLM), and a mechanical interlock (N.C.)
• The shielded twisted pair primary/secondary link to the other gate operator (the diagram note reads "Ground the shield of the cable to the chassis ground of each operator"; see the documentation note below)
• Accessory power outputs: POWER SW and ACCESSORY ON POWER, 24 VDC 1 A maximum

Notes printed on the diagram by LiftMaster: "Attach ground wires to metal chassis with single PEM stud. Each ring term needs a separate nut."

Source: LiftMaster manual, 114-5331-000E, page 55.

HDSL24UL Control Board Connections

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. The EXIT, SHADOW, and INTERRUPT inputs are NOT TO BE USED AS ENTRAPMENT PROTECTION.

LiftMaster HDSL24UL control board inputs and outputs

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Source: LiftMaster manual, 114-5331-000E, pages 16, 33, and 34.

HDSL24UL Accessory and Expansion Board Connections

The HDSL24UL expansion board and relay adapter board provide additional inputs and auxiliary relays. LiftMaster states: to avoid damaging the circuit board, relays or accessories, DO NOT connect more than 42 Vdc (32 Vac) to the AUX relay contact terminal blocks.

Expansion board switches (LiftMaster)

• QUICK CLOSE: OFF: no change to the gate's normal operation. ON: when the CLOSE EYES/Interrupt loop is deactivated it causes an opening or a stopped gate to close (ignores the Timer-to-Close).
• AC FAIL: OPEN: loss of AC power will cause the gate to open approximately 15 seconds after AC power fail and remain OPEN until AC power is restored (enabling the Timer-to-Close). BATT: with loss of AC power, the gate will remain in present position and the operator is powered from batteries.
• EXIT FAIL: when set to OPEN, if the EXIT plug-in loop detector (Model LOOPDETLM) detects a fault, the gate will open and remain open until the fault is cleared. When set to CLOSE, plug-in EXIT loop detector faults are ignored (EXIT loop is faulted and inoperative).
• ANTI-TAIL: OFF: when the CLOSE EYES/Interrupt loop is activated it causes a closing gate to stop and reverse. ON: it causes a closing gate to pause; once the vehicle is clear the gate will continue to close.
• AUX RELAY switches: set as needed to obtain the desired function (table below).
• EYE/EDGE switches: set to obtain the desired OPEN or CLOSE functionality.
• 1, 2, and 3 LEDs: indicate the status of the EYE/EDGE inputs, and are also used to check the firmware version of the expansion board (disconnect AC/DC power to the main control board for 15 seconds, then reconnect power; LED 1 flashes the version number, then LED 2 flashes the revision number).

Source: LiftMaster manual, 114-5331-000E, page 35.

HDSL24UL auxiliary relay 1 and 2 switch settings (relay contacts: Class 2 low voltage only, 42 Vdc [34 Vac] max, 5 Amps)

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Cycle count (LiftMaster): note the current Aux Relay switch positions first. To determine the actual cycles the operator has run (in thousands), set all three Aux Relay switches to ON for Aux Relay 1. LED 1 blinks 1000's, LED 2 blinks 10,000's, LED 3 blinks 100,000's, and all three blink together for 1,000,000's (example: 1 LED blinks 3 times, 2 LED blinks 6 times, and 3 LED blinks once is 163,000). Cycle count displayed is between 1,000 and 9,999,000 cycles. After servicing, set the Aux Relay switches back to their appropriate settings. The manual also contains a red/green light functionality table (red light wired to Aux Relay 1, green light to Aux Relay 2) on page 36.

Source: LiftMaster manual, 114-5331-000E, page 36.

HDSL24UL expansion board inputs

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Source: LiftMaster manual, 114-5331-000E, page 37.

HDSL24UL Battery Connections (Step 7)

The batteries are charged in the circuit by the integrated transformer.

Source: LiftMaster manual, 114-5331-000E, page 19.

Source: LiftMaster manual, 114-5331-000E, page 19.

HDSL24UL Solar Power Connections

Solar panels are not provided (see Accessories). LiftMaster lists these solar application requirements: a minimum of two 10W solar panels in series (Model SP10W12V); a maximum of six 10W solar panels (Model SP10W12V); and a heater cannot be used with a solar application. The use of photoelectric sensor heaters (models LMRRUL and LMTBUL) is NOT recommended in solar applications.

LiftMaster's solar zones are based on average solar radiation and the temperature effects on batteries: Zone 1 (6 hours of sunlight per day) is ideal for solar; Zone 2 (4 hours) is recommended; Zone 3 (2 hours) depends on the type of gate operator and location of the solar panel. 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 per day ratings are approximations. Solar panels cannot be installed in areas that experience long periods of heavy fog, lake effect snow, or rain.

Source: LiftMaster manual, 114-5331-000E, page 45.

Typical HDSL24UL system standby battery current consumption (24V)

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Add up the current draw by feature and accessory to determine total current draw. For gate cycles per day by zone, panel wattage, battery size, and battery current draw, see the solar gate cycles per day table on page 46 of the manual (LiftMaster prints it for a 1,250 lb. gate with 20 ft. travel) or LiftMaster's Gate Operator Solar Cycle Reference Guide. LiftMaster states that all performance metrics are estimates, are subject to change at any time, and that actual results will vary due to variables specific to the site.

Source: LiftMaster manual, 114-5331-000E, page 46.

HDSL24UL maximum solar wire length in feet (meters)

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Chart assumes copper wire, 65°C, 5% drop, 30V nominal.

Source: LiftMaster manual, 114-5331-000E, pages 47 to 48.

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LiftMaster HDSL24UL Programming

LiftMaster covers travel limits, speed, and force under "Adjustment" and remote controls, the Internet Gateway, and the CAPXL under "Programming." This page groups them by task. Programming procedures apply to the LiftMaster HDSL24UL (display shows "HL" followed by "24").

How to Program Travel Limits, Speed, and Force on the LiftMaster HDSL24UL

The HDSL24UL uses electronic limit, speed, and force controls. Setting the open and close limits also sets the force automatically; the speed is set with the SPEED CONTROL dial, and the force is then fine-tuned with the REVERSAL FORCE dial. Limits can be set from the control board (this procedure) or with a 3-button remote control (see below).

Prerequisites (LiftMaster): the gate MUST be attached to the operator before setting the limits and force. For dual gate applications the limits must be set for each operator. For slide gate applications the open limit and closed limit MUST be set at least four feet apart. The TEST buttons on the control board will not work until the limits have been set and the required entrapment protection devices are installed. If a mistake is made while programming the limits, press the reset button to start over.

Source: LiftMaster manual, 114-5331-000E, page 23.

HDSL24UL limit setup LEDs (next to the SET OPEN and SET CLOSE buttons)

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Source: LiftMaster manual, 114-5331-000E, page 24.

How to Set HDSL24UL Limits with a Remote Control

To set the limits using a remote control, you need a 3-button remote control that has been programmed for OPEN, CLOSE, and STOP (see programming a remote). For dual gate applications the limits must be set for each operator, and the gate MUST be attached to the operator before setting the limits and force.

Source: LiftMaster manual, 114-5331-000E, page 54.

How to Program a Remote Control to the LiftMaster HDSL24UL

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, the first keyless entry will be erased to allow the third 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 (see Erase All Codes). If installing an 86LM to extend the range of the remote controls, DO NOT straighten the antenna.

LiftMaster describes three programming options depending on how you want the remote control to function. In each case the operator will time out of programming mode after 30 seconds.

Expected result: the operator will automatically exit learn mode (operator will beep and the green XMITTER LED will go out) if programming is successful. To program additional Security+ 2.0 remote controls or remote control buttons, repeat the programming steps.

Source: LiftMaster manual, 114-5331-000E, page 26.

How to Connect the HDSL24UL to the LiftMaster Internet Gateway and the CAPXL

The LiftMaster Internet Gateway is not provided.

Source: LiftMaster manual, 114-5331-000E, page 27.

CAPXL Connected Access Portal

The CAPXL can communicate wirelessly to LiftMaster UL325 2016 gate operators to send open commands, monitor gate position, and send email notifications if an error occurs in the operator (email notifications are configured in myQ Business). Up to 8 gate operators can be paired with the CAPXL, one for each primary and auxiliary relay. If using dual gates, program the CAPXL to the primary operator.

Source: LiftMaster manual, 114-5331-000E, page 27.

How to Configure Additional Settings on the HDSL24UL

Timer-to-Close (TTC) dial

The TIMER-TO-CLOSE 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 the OFF position, the gate will remain open until the operator receives another command from a control. The range is 0 to 180 seconds; 0 seconds is OFF. Any radio command, single button control, or CLOSE command on the control board prior to the TTC expiring will close the gate. The TTC is reset by any signals from the open controls, loops, close edges, and close photoelectric sensors (IR's).

Source: LiftMaster manual, 114-5331-000E, page 30.

BATT FAIL switch

• 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. Set to CLOSE, it 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.

Source: LiftMaster manual, 114-5331-000E, page 30.

Gate operator setup examples

LiftMaster provides example setups and states that your specific site requirements may be different. Always set up the operator system to the site requirements, including all necessary entrapment protection devices. LiftMaster defines the site types as: Residential, one to four residential homes sharing a gated entrance/exit, where allowing vehicle access trumps security concerns; Commercial/General Access, a residential community (more than four homes) having one or more gated entrances/exits, where allowing vehicle access trumps security concerns; Commercial, a business site where security (gate closed) is important; Industrial, a large business site where security is required.

LiftMaster example HDSL24UL settings by site type

Swipe sideways to see all columns.

Source: LiftMaster manual, 114-5331-000E, page 29.

Dual gate settings

LiftMaster recommends that all accessories, except entrapment protection devices, and board configurations are set on the primary operator.

LiftMaster dual gate settings for two HDSL24UL operators

Swipe sideways to see all columns.

Source: LiftMaster manual, 114-5331-000E, page 53.

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. CPO 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 #.

Gate Hold Open feature

The gate hold open feature will disable the timer and keep the gate at the open limit. It can be activated with the reset switch (see Reset Switch) or through the KPW5 and KPW250 keypads (not provided). To use it from a keypad:

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: re-enter the 4-digit PIN, or activate a hard input or a programmed remote.

Source: LiftMaster manual, 114-5331-000E, page 28.

How to Reset or Reprogram the HDSL24UL

The following reset and erase procedures are the ones LiftMaster documents for the HDSL24UL.

Source: LiftMaster manual, 114-5331-000E, page 28.

Related reset procedures: deactivate the wireless dual gate feature, reset the diagnostic code history, and use the reset switch to clear the operator alarm. If the control board has just been replaced and the display shows code 36, see code 36.

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LiftMaster HDSL24UL Operation

HDSL24UL Control Board Overview

LiftMaster identifies these control board features (numbers match the manual's callouts on page 30):

1. SET OPEN button: sets the OPEN limit.
2. SET CLOSE button: sets the CLOSE limit.
3. DIAGNOSTICS display: shows the operator type, firmware version, and codes. The operator type will display as "HL" followed by a "24", which indicates the operator type as HDSL24UL. The firmware version will show after the operator type (example "1.2").
4. BATT FAIL switch: see BATT FAIL.
5. BIPART DELAY switch: the LOCK/BIPART DELAY switch is used only for dual gates. See Bipart delay.
6. LEARN button: used for programming remote controls and the network.
7. TEST buttons: operate the gate (OPEN, STOP and CLOSE).
8. MOVE GATE buttons: open or close the gate when the operator is in limit setting mode.
9. SPEED CONTROL dial: sets maximum gate speed. See Speed control.
10. TIMER-TO-CLOSE dial: see Timer-to-Close.
11. REVERSAL FORCE dial: fine tunes the force. See fine tune the force.
12. STATUS LEDs: indicate the status of the operator. See the Control Board LEDs.

Source: LiftMaster manual, 114-5331-000E, page 30.

How to Manually Open the HDSL24UL Gate (Manual Disconnect)

1. Set the reset switch to the RESET position.
2. Pull the manual release handle.

To resume normal function, release the handle and set the switch to NORMAL OPERATION. On a dual gate application the handle must be released on both operators.

Source: LiftMaster manual, 114-5331-000E, page 31.

HDSL24UL Reset Switch

The reset switch has the following functions (LiftMaster):

• Set the switch to the RESET position to disable gate operation. Use this switch before servicing the gate or manually disconnecting the gate. The stop LED will be illuminated.
• To hold the gate open, run the gate to the open position and then set the switch to the RESET position.
• Toggle the reset switch to RESET and then back to NORMAL OPERATION when the operator alarm has been set off (see Operator Alarm).
• To put the operator into high band programming mode, give the operator an OPEN command. Within 30 seconds, when the gate is at the open limit, toggle the reset switch between RESET and NORMAL OPERATION three times.

Source: LiftMaster manual, 114-5331-000E, page 31.

Relay Adapter Board and Terminal Block Access

To access the relay adapter board and terminal block, loosen the two screws of the control board bracket, slide the whole bracket to the right, then swing it open.

Source: LiftMaster manual, 114-5331-000E, page 31.

HDSL24UL Operator Alarm

When the inherent force of the operator detects any of the following twice consecutively, the alarm will sound for up to 5 minutes and the operator will need to be reset:

• The gate is hitting an obstruction.
• The gate does not meet specifications.
• Debris is on the gate's track such as mud, rocks, dirt, etc.
• The gate has one or more broken axles or wheels.
• The gate wheel is off the gate rail.

1. Remove any obstructions or repair the gate system.
2. Toggle the reset switch to RESET and then back to NORMAL OPERATION 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, 114-5331-000E, page 32.

HDSL24UL Remote Control Operation

There are three options for programming the remote control, depending on how you would like it to function (see programming a remote).

Single button open only: when the gate is in the closed position, activation of the remote control button will open the gate. The Timer-to-Close can be set to close the gate.

Single button control (SBC) functionality (one button as open, close, and stop): 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 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.

Three button remote control: program each remote control button as an open, close, and stop.

Source: LiftMaster manual, 114-5331-000E, page 32.

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LiftMaster HDSL24UL Troubleshooting

This section follows the troubleshooting chart in LiftMaster's HDSL24UL installation manual (document 114-5331-000E). 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, and have all maintenance performed by a Trained Gate Systems Technician. If the display shows a number, look it up in Diagnostic Codes first.

• 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 charging problems
• Complete troubleshooting chart (29 symptoms)
• Control board LEDs

LiftMaster HDSL24UL Troubleshooting Chart

LiftMaster HDSL24UL troubleshooting chart (letters in each row correspond: cause a is checked with action a)

Swipe sideways to see all columns.

Source: LiftMaster manual, 114-5331-000E, pages 42 to 44.

Gate Will Not Open or the LiftMaster HDSL24UL Does Not Move

If a LiftMaster HDSL24UL 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 in the RESET position: Set reset switch to NORMAL OPERATION.
• Jumper is not in place for stop circuit: 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.
• Inoperable control board: Replace inoperable control board.
• Inoperable motor or motor control module: Replace motor or motor control module.

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 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 gate 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." LiftMaster directs you to use the manual disconnect, move the gate manually, and ensure it moves easily and freely limit to limit, and, for slide gates, to ensure the gate moves at least four feet between the OPEN limit and the CLOSE limit. See How to Program Travel Limits, Speed, and Force.

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 Vdc or higher. Charge batteries by AC or solar power or replace batteries.
• Inherent entrapment protection was activated while moving: If there are no obstructions in gate path, manually disconnect the gate, and ensure it moves easily limit to limit. Repair gate as needed.

Source: LiftMaster manual, 114-5331-000E, pages 42 to 43.

Gate Opens but Will Not Close on the LiftMaster HDSL24UL

When a LiftMaster HDSL24UL gate opens but will not close with a transmitter or the Timer-to-Close, LiftMaster lists the following possible causes and checks (chart row):

• Open control active: Check all open inputs for an active input.
• Vehicle loop detector active: Check all vehicle detector inputs for an active detector.
• Loss of AC power with AC FAIL set to OPEN: Check AC power and AC Fail option setting.
• Low battery with LOW BATT set to OPEN: Check if AC power is available. If no AC power, then running on batteries and battery voltage must be 23 Vdc or higher. Charge batteries by AC or solar power or replace batteries.
• Fire dept input active: Check Fire Dept input.
• Timer-to-Close not set: Check Timer-to-Close (TTC) setting.
• Close entrapment protection device active: 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, 114-5331-000E, page 43.

LiftMaster HDSL24UL Has No Power or the Display Is Off

If the LiftMaster HDSL24UL 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 on the power board.
3. If on battery power only, low or dead batteries: Charge batteries by AC or solar power or replace batteries.
4. Inoperable control board: Replace inoperable control board.
5. Inoperable power board: Replace power board.

Remember that the operator's AC power switch only turns off AC power to the control board and does not turn off battery power. For battery connections see Battery Connections. Related codes in LiftMaster's table include code 42, no battery at boot up, and code 53, brownout occurred.

Source: LiftMaster manual, 114-5331-000E, page 42.

LiftMaster HDSL24UL Remote Control Does Not Operate the Gate

For a wireless control or transmitter that does not operate a LiftMaster HDSL24UL 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. Reset switch is in the off position: Set reset switch to NORMAL OPERATION, see page 31.
3. 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, 114-5331-000E, pages 26 and 42.

LiftMaster HDSL24UL Safety Device Problems

The LiftMaster HDSL24UL will not run unless a minimum of two external entrapment protection devices are connected, one in the open direction and one in the closed direction. 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. Inoperable photoelectric sensor: Replace inoperable 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. Inoperable edge sensor: Replace inoperable 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): Inoperable main board to expansion board 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. Inoperable expansion board or inoperable main board: Replace inoperable expansion board or main board.

Source: LiftMaster manual, 114-5331-000E, page 43.

LiftMaster HDSL24UL Battery and Charging Problems

LiftMaster's guidance on HDSL24UL batteries and charging:

• The operator's alarm will beep 3 times with a command if the battery is low (row). Check if AC power is available. If no AC power, the operator is running on batteries and battery voltage must be 23 Vdc or higher; charge the batteries by AC or solar power or replace the batteries.
• Critically low battery is less than 23 V. 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 (see BATT FAIL).
• A gate that stops and reverses immediately can be caused by low battery voltage (row); battery voltage must be 23 Vdc or higher.
• Battery diagnostic codes: 40 (battery overvoltage), 41 (battery overcurrent), 42 (no battery at boot up). Wireless edge batteries: code 46.
• For solar operators: if the operator is not getting enough cycles per day or has insufficient standby time, see the solar rows.
• Batteries degrade over time depending on temperature and usage and do not perform well in extremely cold temperatures. LiftMaster recommends replacing them every 3 years with LiftMaster part 29-NP712 only. See Battery replacement.

The LiftMaster HDSL24UL battery charge status LEDs are described under Control Board LEDs.

Source: LiftMaster manual, 114-5331-000E, pages 30, 32, 39, and 42 to 44.

HDSL24UL Control Board LEDs

HDSL24UL control board status LEDs

Swipe sideways to see all columns.

HDSL24UL control board input LEDs

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Source: LiftMaster manual, 114-5331-000E, page 41.

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LiftMaster HDSL24UL Diagnostic and Error Codes

The LiftMaster HDSL24UL 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.

How to Read HDSL24UL Diagnostic Codes

Source: LiftMaster manual, 114-5331-000E, page 40.

LiftMaster HDSL24UL 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
• 34
• 35
• 36
• 37
• 38
• 40
• 41
• 42
• 43
• 44
• 45
• 46
• 47
• 48
• 50
• 53
• 54
• 60
• 61
• 62
• 63
• 64
• 65
• 66
• 67
• 68
• 69
• 70
• 71
• 72
• 73
• 74
• 75
• 80
• 81
• 82
• 83
• 84
• 91
• 93
• 95
• 96
• 99

LiftMaster HDSL24UL 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 HDSL24UL Maintenance

Source: LiftMaster manual, 114-5331-000E, page 38.

HDSL24UL Maintenance Chart

Disconnect all power (AC, solar, battery) to the operator before servicing.

LiftMaster HDSL24UL maintenance schedule (check at least once every)

Swipe sideways to see all columns.

• Limits may have to be reset after any major drive chain adjustments.
• If lubricating chain, use only lithium spray. Never use grease or silicone spray.
• LiftMaster suggests 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.

Source: LiftMaster manual, 114-5331-000E, page 39.

HDSL24UL Battery Replacement

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, LiftMaster recommends replacing the batteries every 3 years. Use only LiftMaster part 29-NP712 for replacement batteries. The batteries contain lead and need to be disposed of properly.

• The operator comes with two 7AH batteries. Two 33AH batteries (A12330SGLPK), with battery harness model K41-0102-000 (not provided), may be used in place of the 7AH batteries. 33AH batteries are NOT compatible if transformer kit model 3PHCONV is installed.
• Two identical 12 Vdc batteries are required for each gate operator. Do not mix 7AH and 33AH batteries within a gate operator.
• To connect replacement batteries, follow the 7AH procedure or the 33AH procedure. Disconnect all power (AC, solar, battery) first.

Source: LiftMaster manual, 114-5331-000E, pages 39 and 51.

CTA: Shop gate operator batteries or battery back-ups from All Security Equipment. Confirm the LiftMaster part number 29-NP712 before ordering.

HDSL24UL Drive Chain Maintenance

Over time, the drive chain on the operator will stretch and need to be tightened. To tighten the drive chain, adjust either of the two chain eye bolts. The chain should have no more than 1 inch of sag for every 10 feet of chain length. Limits may have to be reset after any major drive chain adjustment. If lubricating the chain, use only lithium spray; never use grease or silicone spray.

Source: LiftMaster manual, 114-5331-000E, page 39.

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LiftMaster HDSL24UL Repair and Replacement Parts

The tables below list the HDSL24UL repair parts and part numbers as printed by LiftMaster on page 49 of manual 114-5331-000E. LiftMaster lists the motor as "Motor, BLDC, HD Gates."

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

LiftMaster HDSL24UL repair parts as listed by LiftMaster (page 49)

Swipe sideways to see all columns.

Additional HDSL24UL parts listed by LiftMaster as "not shown" in the diagram (page 49)

Swipe sideways to see all columns.

Source: LiftMaster manual, 114-5331-000E, page 49.

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Compatible HDSL24UL Accessories

LiftMaster's manual lists the following accessories for the HDSL24UL (pages 50 to 51). 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, monitored through beam photoelectric sensor
• LMRRUL, monitored retro-reflective photoelectric sensor
• 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.)
• WR4, WR5, WR6 (wraparound round monitored edge) and WS4, WS5, WS6 (wraparound square monitored edge)
• ETOOL, edge cutting tool

Remote Controls and Access Devices

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
• 811LM and 813LM, universal single and 3-button remote controls (ideal for applications requiring a large number of 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)

Other HDSL24UL Accessories

• 828LM, LiftMaster Internet Gateway, which connects your gate operator to your WiFi network (ASE product page)
• MPEL, post-mounting plate for HDSL24UL, CSW24UL, CSW200UL, SL3000UL, CSL24UL, and HDSW24UL commercial gate operators (posts not included)
• CAPXL and CAPXLV, myQ Business connected access protocol, high capacity
• LMSC1000, long range RFID reader
• 86LM, remote antenna extension kit
• LOOPDETLM, plug-in loop detector (not to be used as entrapment protection) and LD7LP, loop detector mounted and wired separately inside the control box. Shop gate loop detectors.
• CP3, vehicle sensing probe
• SP10W12V and SP20W12V, solar panel kits (60W maximum for 24 Vdc operators and 30W maximum for 12 Vdc operators). Shop solar panels.
• 3PHCONV, transformer kit (changes input voltage 208/240/480/575 Vac to an output voltage of 120 Vac; rated 208/240/480/575 Vac, 5.2/4.5/2.3/1.9 A, 60 Hz, 1 PH). The transformer kit is NOT compatible with 33AH batteries.
• MG1300, outdoor magnetic lock kit (not for use with solar applications; must be powered separately). Shop magnetic locks.
• HTR, heater (keeps the gearbox and batteries at a suitable temperature; thermostat set between 45°F and 60°F (7°C and 15.5°C); powered by 110 to 250 Vac)
• K77-37972, solenoid lock harness kit
• 40-39235, warning sign

Batteries and Battery Hardware

• 29-NP712 (1) and K74-30762 (2), standard 7AH 12 Vdc batteries (reuse existing harnesses)
• A12330SGLPK, upgrade 33AH 12 Vdc battery (ideal for solar applications and extended battery backup; two required)
• K41-0102-000, battery harness, 33AH, HD gates (for 33AH battery applications)

Two identical 12 Vdc batteries are required for each gate operator. Do not mix 7AH and 33AH batteries within a gate operator. 33AH batteries are NOT compatible if transformer kit model 3PHCONV is installed. Shop gate operator batteries.

Source: LiftMaster manual, 114-5331-000E, pages 50 to 51.

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LiftMaster HDSL24UL Frequently Asked Questions

Where can I find the LiftMaster HDSL24UL manual?

LiftMaster publishes the HDSL24UL installation manual (document 114-5331-000) in English, French, and Spanish on its HDSL24UL product page. The English PDF is available from the original LiftMaster manual link, and this page presents its content in HTML. LiftMaster also lists a separate wiring diagram (see Original LiftMaster Documentation).

How do I program the travel limits on a LiftMaster HDSL24UL?

With the gate attached to the operator, press and release SET OPEN and SET CLOSE together, move the gate to each limit with the MOVE GATE buttons and press the matching SET button, then set the speed dial and cycle the gate open and close to set the force automatically. For slide gates the limits must be at least four feet apart. See How to Program Travel Limits and test with the obstruction test afterward.

How do I program a remote control to a HDSL24UL?

Press and release the LEARN button (the green XMITTER LED lights), then, depending on the option you want, press the OPEN, CLOSE, or STOP button where LiftMaster directs, and press the remote control button to program. The operator times out of programming mode after 30 seconds and exits learn mode automatically when programming succeeds. Up to 50 Security+ 2.0 remotes or KPW250 keypads and 2 keyless entries can be stored. See How to Program a Remote Control.

What do HDSL24UL diagnostic codes mean and how do I see them?

Press and hold STOP, then CLOSE, then OPEN until "Er" shows on the display; the display then shows the code sequence number ("01" is the most recent) followed by the code. Press OPEN to go to the most recent code and CLOSE to go to the oldest (up to 20 are saved). Every code is listed with LiftMaster's recommended action in the code table; for example code 60 means the minimum number of monitored entrapment protection devices is not installed.

Why will my HDSL24UL gate not close?

LiftMaster lists these causes for a HDSL24UL gate that opens but will not close with a transmitter or the Timer-to-Close: an active Open control, an active vehicle loop detector, loss of AC power with AC FAIL set to OPEN, low battery with LOW BATT set to OPEN, an active Fire Dept input, the Timer-to-Close not set, or an active close entrapment protection device. See Gate Opens but Will Not Close for each check.

What batteries does the HDSL24UL use?

The HDSL24UL comes with two 12 Vdc 7AH batteries. LiftMaster states to use only part 29-NP712 for replacement batteries and recommends replacing them every 3 years. Two 33AH batteries (A12330SGLPK) with battery harness K41-0102-000 (not provided) may be used instead. Two identical batteries are required, and 7AH and 33AH batteries must not be mixed. See Battery Replacement.

Where can I find the HDSL24UL wiring diagram?

The wiring diagram is on page 55 of LiftMaster's installation manual 114-5331-000E. LiftMaster also publishes a combined HDSL24UL, HDSW24UL wiring diagram (01-39240-13). See HDSL24UL Wiring Diagram.

How many entrapment protection devices does the HDSL24UL need?

LiftMaster requires a minimum of two independent monitored entrapment protection devices at each entrapment zone, and the operator will only operate with a minimum of two independent monitored devices in each direction: two in the open direction and two in the closed direction. The HDSL24UL has one inherent device, and the installer must add at least one external device for each entrapment zone; the operator will not run unless one external device is connected in each direction. See UL 325 Entrapment Protection Requirements.

How do I manually open the HDSL24UL gate?

Set the reset switch to the RESET position, then pull the manual release handle and move the gate by hand. To resume normal function, release the handle and set the switch to NORMAL OPERATION. On a dual gate application the handle must be released on both operators. Use the manual disconnect only when the gate is not moving. See Manual Disconnect.

What replacement parts are available for the HDSL24UL?

LiftMaster lists HDSL24UL repair parts including the main board (K41-0073-000), HD power board (K41-0071-000), expansion board (K1D8387-1CC), relay adapter board (K41-0072-000), BLDC motor (K41-0082-000), BLDC motor drive (K41-0095-000), gear reducer (K41-0062-000), output sprocket (K41-0063-000), reset switch (K41-0093-000), cover (K41-0055-000), and 7AH batteries (29-NP712). See the full list in Repair and Replacement Parts.

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Original LiftMaster HDSL24UL Documentation

All documents below are hosted by LiftMaster and linked from the LiftMaster HDSL24UL product page. Check that page for the current revision before relying on any document, because LiftMaster may update them.

• LiftMaster HDSL24UL Installation Manual, English (114-5331-000E): the document this page is based on.
• LiftMaster HDSL24UL Installation Manual, French (114-5332-000) and Spanish (114-5479-000)
• LiftMaster HDSL24UL, HDSW24UL Wiring Diagram, English and French (01-39240-13)
• LiftMaster HD Gate Operator Brochure, English
• LiftMaster Model HDSL24UL Product Guide, English
• LiftMaster HDSL24UL Product Data Sheet and Product Drawing
• LiftMaster Gate Operator Solar Cycle Reference Guide, English
• LiftMaster Gate Safety Checklist (Site Planning Safety Checklist)
• LiftMaster UL 325 Listed Gate Operator Feature Chart and Gate Operator Radio Technology Compatibility
• LiftMaster / Chamberlain Group product support

Warranty (LiftMaster). Per the manual, the LiftMaster warranty for the HDSL24UL is 7 years residential and 5 years commercial; the warranty terms, including exclusions, are printed on page 52 of the manual, and warranty service starts with a call to 1-800-528-2806 before dismantling the product.

Trademark and independence notice. LiftMaster, myQ, and Security+ 2.0 are trademarks of The Chamberlain Group LLC. This HTML resource is presented by All Security Equipment, is not a LiftMaster publication, and does not replace the original manufacturer documentation.

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Related LiftMaster Resources

• LiftMaster HDSL24UL product page at All Security Equipment
• Slide gate operators and LiftMaster products
• Gate operator parts, gate operator accessories, and battery back-ups
• Gate operator articles and the Help Center

Other LiftMaster slide gate operator manuals on this site: LiftMaster CSL24UL instruction manual | LiftMaster INSL24UL instruction manual | LiftMaster IHSL24UL instruction manual | LiftMaster RSL12UL instruction manual | LiftMaster SL3000UL instruction manual