Dolphin M400 - Pool MAYTRONICS - Free user manual and instructions
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USER MANUAL Dolphin M400 MAYTRONICS
EN User Instructions
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Exterior view of a modern office building (no signage)What You'll Find Inside the Box

Filter and cartridges

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Diagram of a tracked robotic machine with directional arrows indicating movement or force (no text or symbols present)Dolphin pool cleaner

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| Part X Comment | ||
| Base frame for filter elements 2 | ||
| Ultra-fine filter 4 filters | ||
| Bag for filters storage 1 | ||
| Spring filter | 4 filters | |
| Power supply unit 1 | ||
| Dolphin pool cleaner 1 | ||
| Caddy kit 1 | ||
| Optional components available on request from your Dolphin distributor | ||
Section 1 - Description of Main Components
1. Filters
There are two types of filters.

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Technical line drawing of a mechanical device with multiple components and no visible text or symbolsSpring filter + base frame
For dirty pools with large debris such as leaves etc. – Useful for beginning of season.

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Technical line drawing of a mechanical assembly with no visible text or symbolsUltra-fine filter cartridge + base frame
For day-to-day use.
Factory default.
2. Brushes
There are three types of optional brushes, each designed to provide optimal traction on different pool surfaces. Only one type set is provided with your Dolphin.

PVC Brush
For concrete, PVC, fiberglass and liner.

Combined Brush
For rough ceramic surface and mosaic tiles.

Wonder Brush
For smooth ceramics.
3. Power supply unit
Digital, "Switch-Mode" power supply:
Input - 100-250 AC Volts•
50-60 Hertz•
180 Watt•
Output - 30 VDC•
IP 54•

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Power Supply On/Off switchSection 2 – Dolphin Operation
Part 1 – Preparing the Dolphin pool cleaner for use
A. Assemble the Caddy kit – you will find the instructions in a separate document
B. Adjusting the handle float angle
The Handle angle must be adjusted to determine the speed that the Dolphin advances along the water-line.
- Press the latch down and hold in position.
- Move the handle to the required position and release the latch to lock the Handle in place.

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Technical line drawing of a mechanical device with a lever and base mount (no text or symbols)Normal advance
More efficient cleaning action on water-line.

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Top-down schematic of a mechanical or architectural layout with symmetrical components and no visible text or symbolsFast advance
Fast speed – For faster but less efficient cleaning action on water-line.

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Top-down schematic of a mechanical or architectural layout with no visible text, numbers, or symbols.C. Laying out the cable
Unwind minimal required cable to cover the entire pool size, straight the cable along the pool side. Make sure there are no twists or kinks.

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3 Meters 10 feet Optional Swivel⚠️ Use only the original supplied power supply unit.
The power supply unit is splash proof – do not immerse it in water.
⚠️ Unplug the power supply unit before any servicing activity.
Do not plug the power supply unit in before placing the pool cleaner in the water.
Ensure the mains outlet is protected by a ground fault interrupter (GFI) or an earth leakage interrupter (ELI).
Part 2 - Into the water
Inserting the Dolphin into the pool.
Place your Dolphin into the pool and release it.

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Mechanical robotic arm diagram showing base and arm components with downward arrows indicating motion (no text or labels)Note: When using the Combined brushes or Wonder brushes, gently squeeze the Wonder brush material until it is totally wet.

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Technical line drawings of a robotic device with hand and foot assembly (no text or symbols)Turning the Dolphin ON
Plug the floating cable from the 1.
Dolphin into the power supply unit.
Plug the electrical cable from the power 2. supply unit into the mains.

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Floating cablePress on the ON/OFF switch. 3.
The Dolphin will now start to work.4.

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Power Supply On/Off switchNote: If your model includes the remote control unit, please refer to the included instruction leaflet.

Important: DO NOT enter the swimming pool while the pool cleaner is working.
Part 3 - Taking the Dolphin out of the water
⚠️ Unplug power supply before any servicing activity.
If the Dolphin has not finished its cycle, turn off the power 1. supply unit and unplug the mains.
Pull the floating cable gently until the Dolphin has risen to 2. the surface, then lift by the handle.

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Diagram showing two mechanical device states: one with a hand operating a tool, the other with a tool on a cart and a hand holding a tool, both marked with check and cross symbols.Important: Do NOT lift the Dolphin from the water by its cable.
Section 3 - Routine Maintenance Part 1 - Extracting and cleaning the filter elements
⚠️ Unplug power supply before any servicing activity.

Reassemble Insert the locating tabs at the bottom of the filter element into their groves on the base frame, then close the "S" clip.

Reinstall the filters according to the diagram DO NOT FORCE THE FILTERS INTO PLACE.

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Technical line drawing of two identical mechanical or electrical components with no visible text or symbolsGrooved end fitting
Octagonal end fitting
Important: Where applicable, you must reset the full filter bag indicator on the power supply unit.
Recommendation: Rinse all brushes with clean water after each cleaning cycle.
Part 2 - Dismantling and cleaning the impeller

Unplug power supply before any servicing activity.
Dismantle the impeller cover and clean around the impeller housing, then reassemble.

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the impeller activity. 1
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Philips heat 2
Philips head
Part 3 - Storage instructions
Coil the cable and store in dry cool area – preferably on the Caddy if available.
✗ Do NOT store the Dolphin exposed to direct sunlight.
✗ Do NOT store the Dolphin exposed to excessive heat.
✗ Do NOT store the Dolphin exposed to frost.
Helpful hints for better scanning of your pool
The floats can be moved side-ways along the handle groove housings.
To Move the floats in their handle housing grooves
Push float outwards.1.
To move the floats back to their original 2. position, while pressing the release button on the base of the float, push the float back.

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Release ButtonThere are three possible float configurations:

Floats default position If turns while scanning less than 90^ , pull out left float.

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Top-down schematic of a vehicle showing front and rear components with a moving arrow (no text or symbols)If turns while scanning more than 90^ , pull out right float.
Troubleshooting Guide
Before contacting your Dolphin distributor please read through this guide.
The pool water condition must be within the following parameters:
| PH: 7.0 – 7.4 Salt: Max 5,000 ppm | |
| Temperature: 12°C(54°F) to 32°C(90°F) Chlorine: Max 2 ppm |
| Symptom Solution | |
| Cable twisting or cable coils up Check for any obstruction in the pool | Change handle diagonal position after each use |
| Remove excess cable from the pool | |
| Make sure filter cartridge is clean | |
| Straighten cable and lay it in the sun periodically | |
| Dolphin is moving in circles or does not reach all pool areas or the Dolphin is not traveling sideways on walls | Check for foreign objects in moving parts |
| Make sure filter cartridge is clean and well mounted and that the filter doors are closed | |
| Make sure that there is enough cable laid out to cover the whole pool | |
| Before using the Dolphin at the beginning of the season you should brush any algae from the floor and walls of the pool | |
| Adjust the diagonal angle of the handle | |
| Dolphin does not climb walls Make sure the filter cartridge is clean | If using the Dolphin at the beginning of the season, use the spring cartridge |
| Check if brushes are suitable for pool coating and replace them if necessary | |
| Check if brushes are worn and replace them if necessary | |
| Make sure the impeller area is clean | |
| When applicable: Check that the RCU is set for climbing | |
| Dolphin not sinking Make sure the Wonder brushes or the combined brushes are soaked in water | |
| Dolphin disengaging from wall at water line If Dolphin climbs too high consult your Dolphin distributor | |
| RCU is not working Check if the batteries need replacing | |
| Motor is not working | Check if the impeller is blocked |
| Check if the drive system is blocked | |
| Electrical problem (power supply), check power source If power source is in order, please contact your Dolphin distributor | |
| Additional troubleshooting is available at our Website: http://www.maytronics.com | |
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