1. Introduction
The Caso Design AF 400 Air Fryer utilizes high-volume hot-air circulation technology to prepare a variety of foods with significantly less fat compared to traditional deep frying methods. This appliance is designed to deliver tender interiors and crispy exteriors for your favorite dishes. This manual provides essential information for safe and efficient operation, maintenance, and troubleshooting.
2. Important Safety Instructions
Please read all instructions carefully before using the appliance. Failure to follow these instructions may result in electric shock, fire, or serious injury.
- Always place the air fryer on a stable, heat-resistant surface, away from walls and other appliances to allow for proper air circulation.
- Do not immerse the appliance, cord, or plug in water or other liquids.
- Supervise children closely when the appliance is in use.
- Do not operate any appliance with a damaged cord or plug, or after the appliance malfunctions or has been damaged in any manner.
- Unplug from outlet when not in use and before cleaning. Allow to cool before putting on or taking off parts.
- Do not use accessories not recommended by the appliance manufacturer, as this may cause injuries.
- Do not let the cord hang over the edge of a table or counter, or touch hot surfaces.
- Do not place on or near a hot gas or electric burner, or in a heated oven.
- Extreme caution must be used when moving an appliance containing hot oil or other hot liquids.
- Do not use the appliance for other than intended household use.
- This appliance is for household use only.
- WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.
3. Product Overview
The Caso Design AF 400 Air Fryer features a sleek design and intuitive controls for ease of use. Key components include the main unit, control panel, and removable frying basket.

Figure 3.1: Front view of the Caso Design AF 400 Air Fryer.

Figure 3.2: Angled view of the Caso Design AF 400 Air Fryer, showcasing its compact design.

Figure 3.3: Close-up of the digital control panel with temperature and timer settings.

Figure 3.4: Internal diagram illustrating the high-volume hot-air circulation technology.

Figure 3.5: The air fryer with its removable frying basket fully pulled out, showing the interior.
4. Setup
Before first use, ensure all packaging materials are removed. Clean the frying basket and interior with warm, soapy water, then rinse and dry thoroughly. Wipe the exterior of the appliance with a damp cloth. Place the air fryer on a flat, stable, heat-resistant surface, ensuring adequate ventilation around the unit.
5. Operating Instructions
The Caso Design AF 400 Air Fryer is designed for simple and efficient cooking. Follow these steps for optimal results:
- Preparation: Place food into the frying basket. Do not overfill the basket to ensure even cooking. The basket can hold up to 2.2 pounds of food.
- Power On: Plug the air fryer into a grounded electrical outlet. The power indicator will illuminate.
- Set Temperature: Use the temperature control buttons (up/down arrows next to the thermometer icon) to set the desired cooking temperature. The display will show the current temperature.
- Set Timer: Use the timer control buttons (up/down arrows next to the clock icon) to set the desired cooking time. The display will show the remaining time in minutes.
- Start Cooking: Press the start/pause button (play icon) to begin the cooking process. The air fryer will start heating and the fan will operate.
- Shaking/Turning Food: For some foods, it may be necessary to shake or turn the food halfway through the cooking time to ensure even browning. Carefully pull out the frying basket, shake or turn the food, and then reinsert the basket. The air fryer will automatically resume cooking.
- Completion: Once the timer reaches zero, the air fryer will beep and automatically shut off. Carefully remove the basket and transfer the cooked food to a serving dish.

Figure 5.1: The frying basket containing french fries, ready for air frying.

Figure 5.2: The frying basket containing onion rings, demonstrating capacity.

Figure 5.3: Example of cooked french fries, served with dipping sauces.
Video: Basic Operation Guide
Video 5.1: This video demonstrates the basic steps for operating the Caso Design AF 400 Air Fryer, including powering on, setting temperature and time, and starting the cooking cycle. It provides a visual guide to the control panel functions.
6. Cleaning and Maintenance
Regular cleaning ensures the longevity and optimal performance of your air fryer.
- Before Cleaning: Always unplug the appliance and allow it to cool completely before cleaning.
- Frying Basket: The frying basket and its components are dishwasher safe. Alternatively, wash them with hot water, dish soap, and a non-abrasive sponge.
- Interior: Wipe the interior of the appliance with a damp cloth. For stubborn food residue, use a mild dish soap and a soft brush. Ensure the interior is completely dry before next use.
- Exterior: Clean the exterior with a damp cloth. Do not use abrasive cleaners or scouring pads, as they may damage the surface.
- Storage: Store the cleaned and dried air fryer in a cool, dry place.
7. Troubleshooting
If you encounter issues with your Caso Design AF 400 Air Fryer, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Air fryer does not turn on. | Appliance is not plugged in. Power outlet is not working. | Ensure the power cord is securely plugged into a working outlet. Check the circuit breaker. |
| Food is not cooked evenly. | Basket is overfilled. Food pieces are too large. Temperature or time settings are incorrect. | Do not overfill the basket. Cut food into smaller, uniform pieces. Adjust temperature and time as needed. Shake or turn food halfway through cooking. |
| White smoke comes from the appliance. | Grease residue from previous use. Excess oil on food. | Clean the basket and interior thoroughly after each use. Pat food dry to remove excess oil before cooking. |
| Food is not crispy. | Not enough oil (for some foods). Temperature too low or time too short. | Lightly brush or spray food with oil. Increase temperature or cooking time. Ensure food is not overcrowded. |
If the problem persists after trying these solutions, please contact Caso Design customer support.
8. Specifications
- Model: AF 400 (13177)
- Brand: Caso Design
- Product Dimensions: 13.4 x 16.54 x 13 inches
- Item Weight: 16.81 pounds
- Capacity: Up to 2.2 lbs of food
- Manufacturer: Caso Design
- ASIN: B07JHGL5NW
- Date First Available: October 18, 2018
9. Warranty and Support
For warranty information, product registration, or technical support, please refer to the official Caso Design website or contact their customer service department. Keep your purchase receipt as proof of purchase for warranty claims.
You can find more information about Caso Design products at their official store: Caso Design Store.







