Dolphin Liberty Cordless Battery-Powered Robotic Pool Cleaner with Multi-Layer Filtration for In-Ground Pools up to 40 ft PSU-FAIL Error Fix: Power Supply Unit Failure

Error code PSU-FAIL on the Dolphin Liberty Cordless Battery-Powered Robotic Pool Cleaner with Multi-Layer Filtration for In-Ground Pools up to 40 ft means: Power Supply Unit Failure. The external power supply unit has failed completely — no indicator lights, no output power; verify the outlet has power first, then try a different outlet; if the PSU still does not power on, the internal transformer or control board has failed and the PSU needs replacement

The most successful fix is "Replace Power Supply Unit" (medium difficulty, ~30 minutes). Estimated DIY cost: $80-$120. HomeMD has 2 community-ranked fixes for this error.

This error is rated medium severity. It should be addressed soon, but your appliance may still function in a limited capacity.

Yes — the top-ranked community fix ("Replace Power Supply Unit") is rated medium difficulty and takes about 30 minutes. Tools needed: Phillips screwdriver, Multimeter.

DIY cost: $80-$120. Professional repair typically costs $150-$220. Many homeowners save money by trying the top-ranked community fix first.

The Dolphin Liberty Cordless Battery-Powered Robotic Pool Cleaner with Multi-Layer Filtration for In-Ground Pools up to 40 ft has 8 other known error codes, including: APP-CONNECT (App Connection Failure), BATT-CHARGE (Battery Not Charging), BATT-LOW (Battery Low or Depleted), BATT-OVERHEAT (Battery Overheating), BRUSH-STOP (Brushes Not Spinning), and 3 more.

Error code PSU-FAIL also appears on 8 other Dolphin models: E10 Automatic Robotic Pool Vacuum Cleaner with Active Scrubber Brush and Top Load Filters for Above-Ground Pools up to 30 ft, EON 120d Robotic Pool Cleaner with DebrisLock Backwash Filter and SmartMap Navigation for In-Ground Pools up to 50 ft, Nautilus CC Plus Wi-Fi Robotic Pool Vacuum Cleaner with Wall Climbing and Scrubber Brush for In-Ground Pools up to 40 ft, Nautilus CC Robotic Pool Vacuum Cleaner with Scrubber Brush for In-Ground Pools up to 33 ft, Premier Robotic Pool Cleaner with Smart Navigation and Multi-Media Filtration for In-Ground Pools up to 50 ft, Proteus DX3 Robotic Pool Cleaner with Active Scrubber Brush and Wall Climbing for In-Ground Pools up to 33 ft, and 2 more. The fix may vary by model, so check each model's specific page for tailored repair steps.