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● Checked Nov 9, 2026From Dolphin support
Dolphin pool cleaner

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

Steps5
ToolsNone
PartsNone

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 answerRed 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

  1. Check that the blue floating cable is connected to the power supply.
  2. Unplug the power supply from the outlet.
  3. Check the impeller and remove anything caught in it.
  4. Check that nothing is blocking the tracks or wheels.
  5. Make sure the cleaner is in the water, then plug in and start again.

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

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 →

Parts that fix this

WheelFor Dolphin pool cleaner on AmazonCheck price →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›No power›Waiting for Bluetooth›Trying to reach the cloud›All 11 Dolphin pool cleaner codes →

Keeps happening? Compare before you replace

Dolphin (Maytronics) Sigma$2,999 · Top corded Dolphin with app control, gyro navigation and weekly timerCheck price on Amazon →
Dolphin (Maytronics) Premier$2,499 · Corded workhorse with swappable filters for leafy in-ground poolsCheck price on Amazon →
Dolphin Nautilus CC Supreme vs Dolphin (Maytronics) SigmaPoint by point

Sources

  1. Maytronics: Dolphin user instructions 8180090
  2. Maytronics: Dolphin X40 Plus user instructions (hosted by a retailer)
  3. Maytronics: Dolphin M600 / Active series user instructions
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