Dolphin M400 Manual: A Comprehensive Guide
This comprehensive guide details the Maytronics Dolphin M400 robotic pool cleaner, offering setup, operation, maintenance, and troubleshooting information for optimal performance and longevity.
The Maytronics Dolphin M400 represents a significant advancement in robotic pool cleaning technology, bringing powerful and convenient automation to pool maintenance. This intelligent device is designed to efficiently clean various pool surfaces – tile, vinyl, and concrete – reducing the time and effort required for manual cleaning.
Featuring Bluetooth connectivity, the M400 allows for seamless remote control and customization via a dedicated smartphone application. Its smart navigation system ensures complete pool coverage, while the weekly timer scheduling feature provides a hands-free cleaning experience. The M400 isn’t just about convenience; it’s about delivering a consistently clean and inviting pool environment.
This manual serves as your complete resource for understanding and maximizing the capabilities of your Dolphin M400, from initial setup to advanced feature utilization.
What’s Included in the Box
Upon opening your Dolphin M400 package, you’ll find several key components designed to ensure a smooth and effective cleaning experience. The box contains the Dolphin M400 robotic pool cleaner unit itself, along with a power supply and a floating cable. A detailed user manual and quick start guide are included for easy setup and operation.
Furthermore, the package includes a filter cartridge, essential for trapping debris and maintaining water clarity. Depending on the specific bundle, you may also receive a caddy for convenient storage and transportation of the unit. Inspect all components carefully upon receipt to ensure everything is present and undamaged.

Keep the original packaging for potential warranty claims or future transportation needs. Familiarize yourself with each item before proceeding with the initial setup process.
Safety Precautions
Prior to operating your Dolphin M400, carefully review these crucial safety precautions to prevent injury or damage to the unit. Always disconnect the power supply before performing any maintenance or inspection. Never operate the cleaner in a pool without sufficient water level; ensure complete submergence.
Do not allow children or pets to play with or near the robotic cleaner while it’s in operation. Avoid running the Dolphin M400 if chemicals are freshly added to the pool water, as this could cause corrosion or damage. Inspect the power cable regularly for any signs of wear or damage, and replace it immediately if necessary.
Never attempt to open or repair the internal components of the cleaner yourself; contact qualified service personnel for assistance. Always ensure the pool is properly grounded to prevent electrical hazards.

Getting Started with Your Dolphin M400
Begin your pool cleaning journey by preparing the unit, connecting via Bluetooth, and downloading the intuitive Dolphin app for seamless control and scheduling.
Initial Setup and Preparation
Before the first dive, carefully unpack your Dolphin M400 and verify all components are present. Inspect the robot for any shipping damage. Lay the power supply and floating cable neatly on the pool deck, ensuring ample cable length for full coverage.
Prior to inserting the Dolphin into the pool, gently squeeze any combined or Wonder brushes until they are thoroughly saturated with water; this ensures optimal grip and cleaning performance. Connect the cable to the power supply, but do not plug it into the electrical outlet yet.
Familiarize yourself with the filter compartment location and access. Ensure the filter is correctly installed before proceeding. A properly prepared setup guarantees a smooth and efficient cleaning cycle, maximizing the Dolphin M400’s capabilities from the start.
Connecting to Bluetooth
The Dolphin M400 boasts convenient Bluetooth connectivity, enabling remote control and monitoring via a compatible smartphone. Begin by downloading and installing the official Dolphin app from your device’s app store. Ensure Bluetooth is enabled on your smartphone.
Power on the Dolphin M400; it will automatically enter pairing mode; Within the Dolphin app, navigate to the “Add Robot” or “Connect” section. The app will scan for available devices; select your Dolphin M400 from the list.
You may be prompted to enter a pairing code (typically found on the robot itself or in the documentation). Once connected, the app will display the robot’s status and allow you to control its functions remotely, including scheduling cleaning cycles and adjusting settings. A stable Bluetooth connection enhances the user experience.
Downloading the Dolphin App
To unlock the full potential of your Dolphin M400, downloading the official Dolphin app is essential. This application provides remote control capabilities, scheduling options, and access to advanced features. The app is available for both iOS and Android devices.
Open the App Store (iOS) or Google Play Store (Android) on your smartphone or tablet. In the search bar, type “Dolphin Robot” or “Maytronics Dolphin”. Locate the official Dolphin app – ensure it’s published by Maytronics.
Tap “Install” and wait for the download and installation process to complete. Once installed, open the app and follow the on-screen instructions to create an account or log in. The app will guide you through connecting your Dolphin M400 via Bluetooth, allowing you to manage your pool cleaning effortlessly.

Understanding the Dolphin M400 Features
The Dolphin M400 boasts smart navigation, weekly scheduling, remote control via Bluetooth, and a selection of brush types for customized pool cleaning performance.
Smart Navigation System
The Dolphin M400 utilizes a sophisticated smart navigation system designed for efficient and thorough pool cleaning. Unlike random pattern cleaners, this robot intelligently scans and maps your pool’s shape and size, optimizing its cleaning path for maximum coverage. This ensures no areas are missed during the cleaning cycle, saving both time and energy.
The system allows the M400 to navigate around obstacles and efficiently clean all pool surfaces – floors, walls, and even the waterline. It avoids getting tangled in cords or stuck on ladders, providing a hassle-free cleaning experience. The intelligent algorithm calculates the most effective route, minimizing redundant movements and maximizing cleaning power. This advanced technology delivers a superior clean compared to traditional robotic pool cleaners, offering a truly automated and convenient solution for pool maintenance.
Weekly Timer Scheduling
A key feature of the Dolphin M400 is its convenient weekly timer scheduling capability, enabled through Bluetooth connectivity and the Dolphin app. This allows you to pre-program cleaning cycles to automatically occur on specific days and times, ensuring your pool remains consistently clean with minimal effort. You can customize the schedule to match your pool usage and preferences, setting different cleaning frequencies for different days of the week.
The app interface provides a user-friendly platform for setting and adjusting the timer. This eliminates the need for manual operation each time you want to clean your pool. Simply set it and forget it! The M400 will autonomously initiate cleaning cycles according to your programmed schedule, providing a consistently sparkling clean pool without any daily intervention. This feature is ideal for maintaining a pristine pool environment effortlessly.
Remote Control Operation
The Maytronics Dolphin M400 boasts impressive remote control operation capabilities, facilitated by its Bluetooth connectivity and dedicated smartphone application. This allows users to manage and monitor the cleaning process directly from their mobile devices, offering unparalleled convenience and control. Through the app, you can start, pause, or stop cleaning cycles, adjust settings, and even steer the robot to focus on specific areas of the pool needing extra attention.
The remote control functionality extends beyond basic operation; it provides real-time feedback on the robot’s status and performance. You can view cleaning progress, battery level, and receive notifications regarding any potential issues. This level of control ensures optimal cleaning efficiency and allows for proactive maintenance. Enjoy the freedom of managing your pool cleaning from anywhere, anytime, with the Dolphin M400’s intuitive remote control system.
Brush Types and Selection
The Dolphin M400 is designed with versatility in mind, accommodating various brush types to suit different pool surfaces and cleaning needs. It can utilize combined brushes, offering a balanced approach for most pool types, or specialized Wonder brushes for enhanced scrubbing power on stubborn dirt and algae. When employing Wonder brushes, it’s crucial to fully saturate them with water before insertion, ensuring proper flexibility and optimal contact with the pool surface.
Selecting the appropriate brush type is vital for maximizing cleaning effectiveness and protecting your pool’s finish. For tile surfaces, softer brushes are recommended to prevent scratching, while more abrasive brushes are suitable for concrete or vinyl pools. Regularly inspecting the brushes for wear and tear is essential, replacing them when necessary to maintain peak performance and prevent damage to the robot or the pool itself.

Operating the Dolphin M400
Effectively operate your Dolphin M400 by understanding manual direction, radio reception, and cleaning cycle selections for a pristine pool, effortlessly maintained.
Inserting the Robot into the Pool
Before inserting the Dolphin M400 into your pool, ensure the power supply is disconnected and the unit is completely dry. Gently lower the robot into the water, allowing it to sink to the bottom – do not drop it. For optimal performance, especially when utilizing combined or Wonder brushes, it’s crucial to thoroughly wet the brush material.
Gently squeeze the Wonder brush until it’s fully saturated with water; this ensures proper adhesion and effective cleaning. Avoid forcing the robot onto pool surfaces, as this could cause damage. Once submerged, connect the floating cable to the power supply, ensuring sufficient slack to allow the robot to move freely throughout the entire pool area. The robot is designed to navigate and clean independently, so simply power it on and let it begin its cycle.
Manual Direction Mode
The Dolphin M400 offers a Manual Direction Mode, providing users with direct control over the robot’s movement within the pool. This feature is particularly useful for targeting specific areas requiring focused cleaning or navigating around obstacles. To activate this mode, utilize the remote control or the Dolphin app, selecting the manual control option.
Once engaged, you can steer the robot in any desired direction – forward, backward, left, or right – using the control interface. This allows for precise cleaning of spots, steps, or along the pool walls. Remember to monitor the robot’s position and avoid entanglement with pool equipment or ladders. When finished, simply switch back to automatic mode for standard cleaning cycles.
Radio Reception Meter Interpretation
The Dolphin M400 utilizes a radio reception meter to indicate the strength of the signal between the robot and the control box or remote control. This meter is crucial for ensuring reliable communication and optimal performance. A strong signal, indicated by multiple filled bars, guarantees seamless control and accurate execution of cleaning programs.
Conversely, a weak signal, displayed with fewer bars, suggests potential communication issues. If the meter shows a weak signal, move closer to the robot with the control box or remote. Obstacles like walls or dense foliage can interfere with the radio waves. When no black lines are showing on the meter, it’s a clear indication to reduce the distance. Maintaining a strong signal ensures uninterrupted cleaning and prevents potential operational errors.
Cleaning Cycle Selection
The Dolphin M400 offers a variety of cleaning cycle options to cater to different pool conditions and cleaning needs. Users can select from pre-programmed cycles designed for quick cleans, standard cleans, or deep, thorough cleans. The duration of each cycle varies, allowing for customized cleaning schedules.
Additionally, the M400 features a spot cleaning mode, ideal for focusing on specific areas requiring immediate attention, such as heavily soiled spots or after a pool party. Cycle selection is typically managed through the control box or, with Bluetooth connectivity, via the Dolphin app on your smartphone. Choosing the appropriate cycle ensures efficient cleaning and optimizes the robot’s performance, extending its lifespan and maintaining pristine pool water quality.

Maintenance and Troubleshooting
Regular maintenance, including filter cleaning and brush inspection, ensures peak performance. This section details solutions for common issues and proper care procedures.
Filter Cleaning and Replacement
Maintaining a clean filter is crucial for optimal Dolphin M400 performance. Regularly inspect the filter for debris after each cleaning cycle. To clean, remove the filter basket or bag and rinse thoroughly with a garden hose, ensuring all particles are removed. Avoid using harsh chemicals or detergents, as these can damage the filter material.
Filter replacement depends on usage frequency and pool conditions. Over time, the filter may become worn or clogged, reducing suction power. Maytronics recommends replacing the filter every 6-12 months, or sooner if noticeable performance degradation occurs. Ensure the replacement filter is specifically designed for the Dolphin M400 model to guarantee a proper fit and effective filtration. A clogged filter significantly impacts cleaning efficiency and can strain the robot’s motor.
Brush Inspection and Replacement
Regular brush inspection is vital for maintaining the Dolphin M400’s cleaning effectiveness. Examine the brushes for wear and tear, such as fraying, cracking, or missing bristles, after every 20-30 cleaning cycles. Worn brushes reduce scrubbing action, impacting the removal of algae and dirt from pool surfaces.
Brush replacement frequency depends on pool type, water chemistry, and usage. Maytronics recommends replacing brushes approximately every 6 months to a year, or when significant wear is observed. When using combined or Wonder brushes, ensure they are fully saturated with water before initial use and during replacement. Always use genuine Dolphin replacement brushes to ensure compatibility and optimal performance. Replacing worn brushes restores the robot’s scrubbing power, ensuring a consistently clean pool;
Troubleshooting Common Issues
If your Dolphin M400 isn’t cleaning effectively, first check the filter and ensure it’s not clogged. A full filter significantly reduces suction. If the robot moves erratically or not at all, inspect the cable for tangles or obstructions. Ensure the power supply is correctly connected and functioning.
Poor radio reception, indicated by black lines on the remote control display, suggests moving closer to the robot. If the robot stops mid-cycle, check for error messages on the Dolphin app or the robot’s indicator lights. Consult the full manual for specific error code definitions. For persistent issues, contact Maytronics customer support, providing the model number and a detailed description of the problem. Regular maintenance minimizes these common issues.
Power Supply and Cable Care
The Dolphin M400’s power supply requires careful handling. Always ensure it’s protected from direct sunlight and water exposure. Avoid using extension cords if possible; if necessary, use a heavy-duty outdoor-rated extension cord. Regularly inspect the power cable for any signs of damage, such as cuts or fraying.
The floating cable is crucial for unrestricted movement. Untangle it completely before each use to prevent it from becoming wrapped around the pool steps or ladder. After cleaning, coil the cable loosely and store it in a dry, shaded area. Avoid pulling the robot by the cable, as this can damage the internal wiring. Proper cable management extends the lifespan of your Dolphin M400.

Advanced Features and Settings
Explore customized cleaning with the Dolphin M400! Utilize spot cleaning, adjust cycle durations, and program tailored cleaning schedules via the intuitive smartphone application.
Custom Cleaning Programs
The Dolphin M400 empowers users with the ability to create personalized cleaning programs tailored to their specific pool needs. Through the Dolphin app, you can define cleaning cycles that focus on particular areas, adjust scrubbing intensity, and establish schedules that align with your pool usage patterns.
This feature allows for efficient cleaning, conserving energy and extending the lifespan of your robotic cleaner. You can program different cycles for weekdays versus weekends, or create a dedicated program for after pool parties. The app interface provides a user-friendly experience, enabling easy customization and management of these programs.
Experiment with various settings to optimize cleaning performance based on pool size, shape, and debris levels. Save multiple programs to quickly switch between cleaning modes, ensuring your pool remains consistently pristine. This level of control provides a truly customized cleaning experience.
Spot Cleaning Mode
The Dolphin M400 features a dedicated Spot Cleaning mode, designed for addressing localized areas of heavy debris or staining within your pool. Activated through the Dolphin app or potentially via onboard controls, this mode directs the robot to intensely scrub a smaller, defined area, providing a concentrated cleaning effort.
This is particularly useful after a period of heavy use, a storm, or when dealing with algae blooms in specific sections of the pool. The robot will focus its cleaning power on the targeted zone, ensuring thorough removal of dirt, leaves, and other contaminants.
Spot Cleaning mode offers a quick and efficient solution for maintaining a consistently clean pool without requiring a full cleaning cycle. It’s an excellent way to address immediate cleaning needs and prevent localized issues from escalating. Utilize this feature for targeted cleaning and enjoy a sparkling pool surface.
Cycle Duration Adjustment
The Dolphin M400 allows for flexible cycle duration adjustments, enabling you to tailor cleaning times to your pool’s specific needs and level of dirtiness. Through the intuitive Dolphin app, users can select from pre-programmed cleaning cycles or create custom durations. This feature is invaluable for optimizing cleaning efficiency and conserving energy.
For lightly soiled pools, a shorter cycle may suffice, while heavily contaminated pools benefit from extended cleaning times. Adjusting the cycle duration ensures comprehensive coverage and effective debris removal. The app interface provides clear options for setting the desired cleaning length, offering precise control over the robot’s operation.
Experimenting with different durations allows you to find the optimal setting for your pool, maximizing cleaning performance and minimizing unnecessary wear and tear on the robot. This customization ensures a consistently clean and inviting pool environment.

Technical Specifications
The Dolphin M400 boasts detailed specifications including power consumption, cable length, filter capacity, and comprehensive warranty details for user understanding and support.
Power Consumption
Understanding the power consumption of your Dolphin M400 is crucial for efficient operation and cost management. This robotic pool cleaner is designed to deliver powerful cleaning performance while remaining energy-conscious. Typically, the Dolphin M400 operates with a maximum power consumption of around 180 watts, making it relatively efficient compared to traditional pool cleaning systems.
However, actual power usage can vary slightly depending on factors such as the cleaning cycle selected, the pool’s surface type, and water conditions. Shorter cleaning cycles, like spot cleaning, will naturally consume less power than a full, comprehensive cleaning program. The power supply unit converts standard household voltage into the appropriate low-voltage DC power required by the robot, ensuring safe and reliable operation. Monitoring your energy usage can help optimize cleaning schedules and minimize electricity costs, contributing to a more sustainable and economical pool maintenance routine.
Cable Length
The Dolphin M400 features a floating cable designed to provide ample reach for cleaning most in-ground pools. The standard cable length is approximately 40 feet (12.2 meters). This generous length allows the robot to navigate and clean a wide range of pool sizes and shapes effectively, minimizing the need for repositioning during the cleaning cycle.
The floating cable is crucial for preventing tangling and ensuring the robot can move freely across the pool surface. It’s important to ensure the cable is fully extended and untangled before each use to maximize cleaning coverage. Avoid forcing the cable or pulling it sharply, as this could potentially damage the unit. Proper cable management extends the lifespan of the cable and ensures optimal performance of your Dolphin M400, delivering consistently clean results.
Filter Capacity
The Dolphin M400 is equipped with a fine filter basket designed to capture a wide range of debris, from large leaves and twigs to fine dirt and algae. The filter boasts a substantial capacity, capable of holding a significant amount of collected particles before requiring cleaning. This minimizes interruptions during the cleaning cycle and ensures consistent performance.

The filter basket’s capacity is optimized for efficient debris removal, contributing to crystal-clear pool water. Regular cleaning of the filter is essential to maintain optimal suction power and prevent clogging. A clogged filter reduces cleaning effectiveness and can potentially strain the robot’s motor. The Dolphin M400’s easily accessible filter basket simplifies the cleaning process, ensuring convenient maintenance and prolonged operational life.

Warranty Information
Maytronics offers a comprehensive warranty on the Dolphin M400 robotic pool cleaner, providing customers with peace of mind and protection against manufacturing defects. The standard warranty typically covers the robot’s motor, electrical components, and mechanical parts for a specified period, usually 24 months from the date of purchase. However, warranty terms can vary based on the region and retailer.
The warranty does not cover damage resulting from improper use, negligence, accidents, or unauthorized repairs. It’s crucial to retain proof of purchase, such as the original receipt, to validate any warranty claims. For detailed warranty information, including specific coverage details and claim procedures, please refer to the official Maytronics website or contact their customer support team. Registering your Dolphin M400 online can streamline the warranty process.