1. Vigtige sikkerhedsinstruktioner
Læs alle instruktioner omhyggeligt, inden du bruger plæneklipperen. Manglende overholdelse af disse instruktioner kan resultere i alvorlig personskade eller materielle skader. Gem denne manual til senere brug.
- Personlig sikkerhed: Always wear appropriate personal protective equipment, including safety glasses, sturdy footwear, and hearing protection. Do not operate the mower barefoot or in open-toed sandals.
- Sikkerhed på arbejdsområdet: Keep the work area clean and well-lit. Do not operate the mower in wet grass or rain. Keep children, bystanders, and pets away from the operating area.
- Elektrisk sikkerhed: Use only the specified battery packs and charger. Do not modify the battery or charger. Avoid accidental starting; ensure the switch is in the off position before inserting the battery pack or moving the appliance.
- Mower Operation: Never place hands or feet near rotating parts. Always disconnect the battery pack before cleaning, servicing, or removing material from the mower. Inspect the area to be mowed and remove all objects that can be thrown by the blade.
- Opretholdelse: Maintain the mower with care. Keep cutting edges sharp and clean. Follow instructions for lubricating and changing accessories.
2. Produktet er slutview
The LawnMaster CLMF4821A is a 48V MAX* 21-inch cordless lawn mower designed for efficient lawn care. It features a brushless motor, 3-in-1 functionality (mulching, bagging, side discharge), and an iPower Technology Display.

Figur 2.1: Diagram illustrating key components of the LawnMaster CLMF4821A mower, including foldable handles, 15-gallon collection bag, 9.3-inch rear wheels, 6.7-inch front wheels, 20-inch cutting width, 21-inch deck width, 6-position height adjustment, and the cutting mode/battery level indicator.
3. Montering
3.1 Montering af håndtag
- Fold den nederste håndtagsdel ud, og fastgør den.
- Attach the upper handle section to the lower handle using the provided knobs and bolts. Ensure all connections are tight.
- Adjust the handle height to a comfortable operating position if applicable and secure.
3.2 Samling af græsopsamlingspose
- Assemble the grass bag frame and attach the fabric bag.
- Lift the rear discharge flap on the mower.
- Hook the grass collection bag onto the mower's rear discharge opening. Ensure it is securely seated to prevent clippings from escaping.
4. Batteri og oplader
The LawnMaster CLMF4821A operates on two 24V MAX* 4.0Ah lithium-ion batteries simultaneously, with two additional batteries included for extended runtime.
4.1 Opladning af batterierne
- Connect the dual charger to a standard power outlet.
- Insert the battery packs into the charger slots. The LED indicators on the charger will show the charging status.
- Allow batteries to fully charge before first use. Charging time for each battery is approximately 9 hours.
- Once fully charged, remove the battery packs from the charger.
4.2 Installing and Removing Batteries
- Installation: Open the battery compartment cover on the mower. Align the battery packs with the battery ports and slide them in until they click into place. Ensure both batteries are fully seated. Close the battery compartment cover.

Figur 4.1: A person demonstrating the correct method for inserting a 24V MAX* 4.0Ah lithium-ion battery into the mower's battery compartment.
- Fjernelse: Open the battery compartment cover. Press the battery release tabs and pull the battery packs out.
5. Betjening
5.1 Start og stop af plæneklipperen
- Starter: Ensure batteries are installed and the safety key (if applicable) is inserted. Press and hold the safety button, then pull the bail switch lever towards the handle. The mower will start.
- Stopper: Release the bail switch lever. The mower will stop.
5.2 Justering af klippehøjde
The mower offers 6 cutting positions, ranging from 1.4 inches to 3.4 inches.
- Ensure the mower is off and the battery is removed before adjusting the cutting height.
- Locate the height adjustment lever on the mower deck.
- Pull the lever outwards and move it to the desired cutting height setting. Release the lever to lock it into position.

Figur 5.1: A user demonstrating how to adjust the 6-position cutting height lever on the LawnMaster CLMF4821A mower, allowing cuts from 1.4 to 3.4 inches.
5.3 Mowing Functions (3-in-1)
The CLMF4821A supports mulching, bagging, and side discharge.
- Poseindpakning: Attach the grass collection bag as described in Section 3.2. This collects clippings for disposal.
- Mulching: Remove the grass collection bag and ensure the mulching plug (if included) is inserted into the rear discharge opening. This finely chops clippings and returns them to the lawn as fertilizer.
- Sideudflåd: Remove the grass collection bag and mulching plug. Attach the side discharge chute (if included) to the side of the mower deck. This expels clippings out the side.

Figur 5.2: A person operating the LawnMaster CLMF4821A mower, showcasing its 3-in-1 cordless convenience for mulching, bagging, or side discharge.
5.4 iPower Technology Display
The iPower Technology Display provides real-time information on the mower's cutting mode and battery level, optimizing energy usage.

Figur 5.3: Nærbillede view of the intelligent iPower Display on the mower handle, indicating the current cutting mode and battery charge level for efficient power management.
6. Vedligeholdelse
6.1 Rengøring af plæneklipperen
- Fjern altid batteripakken før rengøring.
- Clean the mower deck and blade area after each use to prevent grass buildup. Use a brush or cloth; avoid using water directly on electrical components.
- Tør de udvendige overflader af med adamp klæde.
6.2 Pleje af blade
- Inspect the blade regularly for sharpness and damage. A dull or damaged blade can affect cutting performance and battery life.
- If the blade is dull, have it sharpened by a qualified service center or replace it with a genuine LawnMaster replacement blade.
- Ensure the blade is balanced after sharpening to prevent vibration.
6.3 Opbevaring
- Remove the battery packs from the mower before storing.
- Rengør plæneklipperen grundigt.
- Fold the handles for compact storage. Store the mower in a dry, secure location, out of reach of children.

Figur 6.1: The LawnMaster CLMF4821A mower stored upright against a wall, demonstrating its compact design with folded handles for easy transport and space-saving storage.
7. Fejlfinding
This section provides solutions to common issues you might encounter with your LawnMaster CLMF4821A lawn mower.
| Problem | Mulig årsag | Løsning |
|---|---|---|
| Plæneklipper starter ikke | Battery not charged or improperly installed; Safety key not inserted; Bail switch not engaged. | Ensure batteries are fully charged and correctly installed. Insert safety key. Engage bail switch lever. |
| Reduceret skæreydelse | Dull or damaged blade; Grass chute clogged; Mowing wet or excessively tall grass. | Sharpen or replace blade. Clear grass chute. Avoid mowing wet grass; raise cutting height for tall grass. |
| Overdreven vibration | Unbalanced or bent blade; Loose blade bolts. | Inspect blade for damage and balance. Tighten blade bolts. Replace blade if bent. |
| Kort batterilevetid | Batteries not fully charged; Mowing thick or tall grass; Batteries reaching end of life. | Ensure batteries are fully charged. Mow at a higher setting for thick grass. Consider replacing old batteries. |
8. Specifikationer
| Feature | Detalje |
|---|---|
| Modelnummer | CLMF4821A |
| Strømkilde | Battery Powered (48V MAX* via 2x 24V MAX* batteries) |
| Motortype | Børsteløs |
| Skærebredde | 20 tommer |
| Dækbredde | 21 tommer |
| Justering af klippehøjde | 6 positioner (1.4 - 3.4 tommer) |
| Funktioner | 3-i-1 (mulching, opsamling, sideudkast) |
| Græsposekapacitet | 15 gallons |
| Batteritype | 24V MAX* 4.0Ah Lithium-ion (4 included) |
| Omtrentlig løbetid | Up to 48 minutes (with 4 batteries, no load) |
| Varens vægt | 44 pund |
| Produktdimensioner | 35" D x 22" B x 15" H |
| Montering påkrævet | Ja |
9. Garanti og kundesupport
For warranty information, please refer to the warranty card included with your product or visit the official LawnMaster website. For technical assistance, replacement parts, or any other inquiries, please contact LawnMaster customer support through their official channels.
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