1. Introduction
This manual provides essential information for the proper installation, use, and maintenance of the MAYTRONICS Diagnostic Basic - Chassis 9980200. This component is a replacement chassis designed for specific MAYTRONICS robotic pool cleaners. Adhering to these instructions will help ensure the longevity and correct function of your pool cleaner.
2. Compatibility
The MAYTRONICS Diagnostic Basic - Chassis 9980200 is specifically designed as a replacement part for certain MAYTRONICS robotic pool cleaner models. Based on user feedback, this chassis is known to be compatible with the Dolphin Deluxe 3 model. Users should verify their specific pool cleaner model number to ensure compatibility before installation.
3. Installation Instructions
Replacing the chassis requires careful handling and attention to detail. It is recommended to perform this procedure in a clean, well-lit area. If you are unsure about any step, consult a qualified technician.
3.1. Safety Precautions
- Always disconnect the pool cleaner from its power source before beginning any maintenance or installation.
- Wear appropriate personal protective equipment, such as gloves, if necessary.
- Keep small parts away from children.
3.2. Required Tools
- Screwdriver set (Phillips and flathead may be required)
- Small pry tool (optional, for separating plastic components)
- Clean work surface
3.3. Step-by-Step Installation
- Disassembly of Old Chassis:
Carefully disassemble your existing pool cleaner to access the old chassis. This typically involves removing the top cover, filter basket, and any internal components attached to the chassis. Document the placement of screws and components, possibly by taking photos, to aid reassembly.

Figure 1: Top-down view of the MAYTRONICS Diagnostic Basic Chassis. This image shows the general shape and internal cavity of the chassis, which forms the main structural frame of the pool cleaner.
- Removing Internal Components:
Once the old chassis is exposed, carefully detach all internal components such as motors, impellers, and wiring harnesses. Note their orientation and connection points. It is crucial to handle these components gently to avoid damage.

Figure 2: Front view of the MAYTRONICS Diagnostic Basic Chassis. This perspective highlights the opening where internal components, such as the motor assembly, would be housed.
- Installing the New Chassis:
Position the new MAYTRONICS Diagnostic Basic - Chassis 9980200 in place of the old one. Ensure it aligns correctly with all mounting points and screw holes. The chassis is designed to fit precisely.

Figure 3: Angled view of the MAYTRONICS Diagnostic Basic Chassis. This image provides a clearer look at the structural integrity and various attachment points on the chassis.
- Reattaching Components:
Carefully reattach all internal components to the new chassis. Ensure all wires are routed correctly and connections are secure. Double-check that no wires are pinched or obstructing moving parts.

Figure 4: View of an internal component or section of the MAYTRONICS Diagnostic Basic Chassis. This detail shows specific mounting points or structural elements within the chassis frame.
- Reassembly:
Once all internal components are secured, reassemble the outer casing of the pool cleaner. Ensure all screws are tightened appropriately, but do not overtighten to avoid stripping threads or cracking plastic.

Figure 5: Side view of a structural piece of the MAYTRONICS Diagnostic Basic Chassis. This image illustrates the curvature and design of a specific part of the chassis frame.
- Final Check:
Before placing the cleaner back into the pool, perform a visual inspection to ensure all parts are correctly assembled and there are no loose components. Test the cleaner's basic functions if possible, such as motor activation, outside of the water for a brief moment to confirm operation.

Figure 6: Another side view of a structural piece of the MAYTRONICS Diagnostic Basic Chassis. This image provides an alternative angle of the chassis component, showing its profile and connection points.
4. Operating Instructions
The MAYTRONICS Diagnostic Basic - Chassis 9980200 is a structural component and does not have direct operating functions. Once correctly installed, the operation of the pool cleaner will revert to its original specifications. Refer to your specific MAYTRONICS robotic pool cleaner's user manual for detailed operating instructions.
5. Maintenance
The chassis itself requires minimal maintenance. Regular inspection during routine pool cleaner maintenance is recommended.
- Cleaning: Periodically clean the chassis of any debris, dirt, or chemical residue that may accumulate. Use fresh water and a soft brush.
- Inspection: During filter cleaning or other routine maintenance, visually inspect the chassis for any signs of cracks, stress, or damage. Ensure all components attached to the chassis remain secure.
- Storage: When the pool cleaner is not in use for extended periods, store it in a dry, shaded area, away from direct sunlight and extreme temperatures, to preserve the integrity of the plastic components.
6. Troubleshooting
Most issues related to the chassis will stem from incorrect installation or physical damage. If you encounter problems after replacing the chassis, consider the following:
- Cleaner Not Moving/Operating:
Ensure all internal components (motors, impellers, drive belts) are correctly reattached and connected. Check for any pinched wires or obstructions. Verify that the power supply is functioning and connected properly.
- Unusual Noises:
This could indicate a component is not seated correctly or is rubbing against the chassis. Disassemble and re-inspect the placement of all parts, especially rotating ones like impellers or brushes.
- Water Leaks (if applicable to the cleaner design):
While the chassis itself is not typically a sealing component, ensure that any seals or gaskets associated with components mounted to the chassis are properly seated and undamaged.
- Physical Damage to New Chassis:
If the chassis was damaged during installation or subsequent use, it may need to be replaced again. Avoid dropping the cleaner or subjecting it to excessive force.
For issues not resolved by these steps, contact MAYTRONICS customer support or a certified service center.
7. Specifications
| Feature | Detail |
|---|---|
| Product Name | MAYTRONICS Diagnostic Basic - Chassis |
| Model Number | 9980200 |
| Brand | MAYTRONICS |
| Material | Durable Plastic (specific type not provided) |
| Compatibility | Designed for specific MAYTRONICS robotic pool cleaners (e.g., Dolphin Deluxe 3) |
| Purpose | Replacement structural frame for pool cleaner |
8. Customer Support
For further assistance, technical support, or inquiries regarding your MAYTRONICS Diagnostic Basic - Chassis 9980200, please contact MAYTRONICS customer service. Refer to the official MAYTRONICS website for contact information and additional resources.
MAYTRONICS Official Website: www.maytronics.com





