[Fix my robot](https://robotsforthat.com/fix/) / [Dolphin pool cleaner](https://robotsforthat.com/guides/dolphin-pool-cleaner-error-codes/) / Fault
● Checked Nov 9, 2026 From Dolphin support

Dolphin pool cleaner

# Dolphin pool cleaner "Fault": what it means and the fix

Steps **5**

Tools **None**

Parts None

Works for Corded Dolphin robots with an On/Off LED and a Bluetooth or Wi-Fi power supply, such as the M600, M700, X40 Plus and Nautilus CC Plus Wi-Fi.

Short answer Red light. Steady red on the On/Off LED of the power supply.
**What it means:** The power supply has found a fault and the cleaner is stopped.

**Quick fix:** Check that the blue floating cable is connected to the power supply.

## Fix it in 5 steps

- Check that the blue floating cable is connected to the power supply. Done?
- Unplug the power supply from the outlet. Done?
- Check the impeller and remove anything caught in it. Done?
- Check that nothing is blocking the tracks or wheels. Done?
- Make sure the cleaner is in the water, then plug in and start again. Did it work?

**Fixed when:** The On/Off LED turns steady blue and the cleaner moves.

Great, it is fixed. Bookmark this page in case it comes back.

**Still showing Fault?**

The problem stays after these steps. Contact your Dolphin dealer or Maytronics support (US: 1-888-365-7446 ext. 1002). Contact Dolphin support at 1-888-365-7446 ext. 1002 (US). Have the serial number ready: On the back of the folder in the packaging, on the side of the box, or inside the robot behind the filter. [Dolphin support →](https://www.maytronics.com/en-us/support/contact-us/)

## Parts that fix this

[Wheel For Dolphin pool cleaner on Amazon Check price →](https://www.amazon.com/s?k=Dolphin%20pool%20cleaner%20replacement%20wheel&tag=robotsforthatai-20) Check the part fits your model. Affiliate links: we may earn a commission at no cost to you.

## Why it happens

- The blue floating cable is not connected to the power supply
- Something is blocking the impeller
- Something is blocking the tracks or wheels
- The cleaner is out of the water

## Other Dolphin pool cleaner errors

[Filter clogged ›](https://robotsforthat.com/fix/dolphin-error-orange-led-filter-clogged/)[No power ›](https://robotsforthat.com/fix/dolphin-error-no-light-no-power/)[Waiting for Bluetooth ›](https://robotsforthat.com/fix/dolphin-error-flashing-blue-waiting-bluetooth/)[Trying to reach the cloud ›](https://robotsforthat.com/fix/dolphin-error-flashing-green-wifi-weak/)[All 11 Dolphin pool cleaner codes →](https://robotsforthat.com/guides/dolphin-pool-cleaner-error-codes/)

## Keeps happening? Compare before you replace

[Dolphin (Maytronics) Sigma $2,999 · Top corded Dolphin with app control, gyro navigation and weekly timer](https://robotsforthat.com/robot/dolphin-sigma/)[Check price on Amazon →](https://www.amazon.com/dp/B07CZ1XVZX?tag=robotsforthatai-20)

[Dolphin (Maytronics) Premier $2,499 · Corded workhorse with swappable filters for leafy in-ground pools](https://robotsforthat.com/robot/dolphin-premier/)[Check price on Amazon →](https://www.amazon.com/dp/B0124QB2EU?tag=robotsforthatai-20)

[Dolphin Nautilus CC Supreme vs Dolphin (Maytronics) Sigma Point by point](https://robotsforthat.com/vs/dolphin-nautilus-cc-supreme-vs-dolphin-sigma/)

**Own a Dolphin (Maytronics)? Keep it running.** Add it to My Robots. See fixes for your exact model, get an email when parts are due, and ask us to find a repair if it breaks. Free · no password

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## Sources

- [Maytronics: Dolphin user instructions 8180090](https://manuals.maytronics.com/images/pdfs/8180090.pdf)
- [Maytronics: Dolphin X40 Plus user instructions (hosted by a retailer)](https://cdn.shopify.com/s/files/1/0619/6635/2435/files/UserManual_Dolphin_X40PLUS.pdf)
- [Maytronics: Dolphin M600 / Active series user instructions](https://brand.maytronics.com/m/25734c72284ac24c/original/User-manual-8180002-EN.pdf)

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