Introduction
This manual provides essential instructions for the safe and effective use, maintenance, and care of your Andis 32400 Slimline Pro Li Cordless Trimmer. Please read all instructions thoroughly before operating the device.

Figure 1: Andis 32400 Slimline Pro Li Cordless Trimmer.
Important Safety Information
When using an electrical appliance, basic precautions should always be followed, including the following:
- Read all instructions before using this appliance.
- To reduce the risk of electric shock, do not reach for an appliance that has fallen into water. Unplug immediately.
- Do not use while bathing or in a shower.
- Do not place or store appliance where it can fall or be pulled into a tub or sink. Do not place in or drop into water or other liquid.
- Always unplug this appliance from the electrical outlet immediately after using.
- Unplug this appliance before cleaning, removing, or assembling parts.
- Close supervision is necessary when this appliance is used by, on, or near children or individuals with certain disabilities.
- Use this appliance only for its intended household use as described in this manual. Do not use attachments not recommended by the manufacturer.
- Never operate this appliance if it has a damaged cord or plug, if it is not working properly, if it has been dropped or damaged, or dropped into water. Return the appliance to an Andis authorized service station for examination and repair.
- Keep the cord away from heated surfaces.
- Never drop or insert any object into any opening.
- Do not use outdoors or operate where aerosol (spray) products are being used or where oxygen is being administered.
- Do not use this appliance with a damaged or broken blade, as injury may occur.
- To disconnect, turn all controls to 'OFF' then remove plug from outlet.
Package Contents
Your Andis 32400 Slimline Pro Li Cordless Trimmer package includes the following items:
- Andis 32400 Slimline Pro Li Cordless Trimmer
- Charging Adapter
- Charger Stand
- 4 Attachment Combs (various sizes)
- Blade Brush
- Blade Oil
- Multiple Plug Adapters for worldwide use

Figure 2: Trimmer and included accessories.
Setup
Charging the Trimmer
The Andis Slimline Pro Li Trimmer features a powerful lithium-ion battery that provides up to 2 hours of run-time on a 2-1/4 hour charge. Before first use, fully charge the trimmer.
- Connect the charging adapter to the charger stand.
- Plug the adapter into a suitable electrical outlet.
- Place the trimmer into the charger stand. The indicator light on the trimmer will illuminate green to show it is charging.
- Once fully charged, the light will remain green or turn off, depending on the model.

Figure 3: Trimmer placed in its charging stand.
Blade Adjustment (Zero-Gapping)
The T-blade can be adjusted for a closer cut, often referred to as "zero-gapping." This procedure should be performed with caution to avoid injury.
- Ensure the trimmer is turned off and unplugged from the charging base.
- Using a small screwdriver, carefully loosen the two screws on the back of the blade assembly.
- Gently adjust the moving blade (the smaller blade) so that its cutting edge is aligned with, or slightly below, the stationary blade (the larger blade). Ensure the teeth of the moving blade do not extend beyond the stationary blade to prevent skin irritation.
- Once aligned, carefully tighten the screws. Test the trimmer on a small area of skin to ensure it cuts smoothly without irritation.
Operating Instructions
The Andis Slimline Pro Li Trimmer is designed for detailed work on hair, beards, and mustaches, including fading, outlining, and general trimming.
General Trimming
- Ensure the trimmer is fully charged or connected to power if using corded.
- Select the desired attachment comb for your preferred hair length. Snap the comb securely onto the blade.
- Turn the trimmer on using the power switch.
- Hold the trimmer with the blade flat against the skin or at a slight angle, depending on the desired cut.
- Move the trimmer against the direction of hair growth for an even cut.
- For edging and outlining, remove the attachment comb and use the bare T-blade. Carefully define hairlines, beard lines, and trim around ears.
Corded/Cordless Operation
This trimmer offers the flexibility of both corded and cordless operation. Use it cordless for maximum maneuverability, or plug it in for continuous power during longer grooming sessions.
Video 1: Demonstrates the features and use of the Andis Slimline Pro Li Trimmer for various grooming tasks, including edging and texturizing.
Maintenance
Proper maintenance ensures the longevity and optimal performance of your trimmer.
Cleaning the Blades
- After each use, turn off and unplug the trimmer.
- Use the provided blade brush to remove any loose hair from the blades.
- For a more thorough cleaning, you may carefully remove the blade assembly (refer to Blade Adjustment section for screw locations) and brush away trapped hair. Reattach securely.
Oiling the Blades
To maintain cutting performance and extend blade life, oil the blades before every use.
- With the trimmer turned off, apply 2-3 drops of Andis Clipper Oil (or a similar high-quality blade oil) across the teeth of the blade.
- Turn the trimmer on for a few seconds to allow the oil to distribute evenly.
- Wipe off any excess oil with a clean, soft cloth.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Trimmer does not turn on. | Battery is depleted; Power switch is off. | Charge the trimmer fully; Ensure the power switch is in the 'ON' position. |
| Trimmer pulls hair or cuts poorly. | Blades are dull, dirty, or not properly oiled; Hair buildup in blades. | Clean and oil the blades; Consider replacing blades if dull; Ensure blades are properly aligned. |
| Trimmer gets hot during use. | Lack of lubrication; Excessive use without breaks. | Oil blades regularly; Allow trimmer to cool down between uses. |
Specifications
- Model: Andis 32400 Slimline Pro Li Cordless Trimmer
- Power Source: Lithium-Ion Rechargeable Battery (Corded/Cordless operation)
- Run Time: Up to 2 hours
- Charge Time: Approximately 2-1/4 hours
- Blade Type: Close-cutting T-Blade
- Motor Speed: Single speed, 6,000 strokes per minute
- Finish: Satin Nickel
- Dimensions: 1.38 x 1.38 x 6.13 inches
- Weight: 4.94 ounces
Warranty and Support
For warranty information, service, or replacement parts, please refer to the warranty card included with your product or visit the official Andis website. Keep your proof of purchase for warranty claims.
For further assistance, contact Andis Customer Service through their official channels.
