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PSU-FAIL

Dolphin · Triton PS Plus Robotic Pool Cleaner with PowerStream Technology for In-Ground Pools up to 50 ft

Dolphin Triton PS Plus Robotic Pool Cleaner with PowerStream Technology for In-Ground Pools up to 50 ft PSU-FAIL Error Fix: 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

Medium severity2 fixes available✨ Free fix available

Quick Answer

Error PSU-FAIL on the Dolphin Triton PS Plus Robotic Pool Cleaner with PowerStream Technology for In-Ground Pools up to 50 ft means: Power Supply Unit Failure. The top-ranked community fix is “Replace Power Supply Unit” (medium difficulty, ~30 min, DIY cost: $80-$120). 2 community-ranked fixes available below.

Published February 2026 · 2 fixes · pool cleaner

Content is based on manufacturer service documentation, community repair experience, and OEM technical bulletins. Always verify with your owner's manual.Learn about our editorial standards.

When to Call a Professional

While many pool cleaner repairs can be done safely at home, consider hiring a qualified technician if:

The repair involves electrical wiring, gas lines, or refrigerant
You've tried the top-ranked fix and the error persists
You smell gas, see sparking, or notice water leaking
The repair requires specialized tools you don't have
Your appliance is still under manufacturer warranty

Average professional repair cost for this issue: $150-$220.

Other Dolphin Models with Error PSU-FAIL

E10 Automatic Robotic Pool Vacuum Cleaner with Active Scrubber Brush and Top Load Filters for Above-Ground Pools up to 30 ft

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EON 120d Robotic Pool Cleaner with DebrisLock Backwash Filter and SmartMap Navigation for In-Ground Pools up to 50 ft

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Liberty Cordless Battery-Powered Robotic Pool Cleaner with Multi-Layer Filtration for In-Ground Pools up to 40 ft

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Nautilus CC Plus Wi-Fi Robotic Pool Vacuum Cleaner with Wall Climbing and Scrubber Brush for In-Ground Pools up to 40 ft

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Nautilus CC Robotic Pool Vacuum Cleaner with Scrubber Brush for In-Ground Pools up to 33 ft

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Premier Robotic Pool Cleaner with Smart Navigation and Multi-Media Filtration for In-Ground Pools up to 50 ft

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Proteus DX3 Robotic Pool Cleaner with Active Scrubber Brush and Wall Climbing for In-Ground Pools up to 33 ft

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Sigma Robotic Pool Cleaner with Gyroscope Navigation and Triple Motor System for In-Ground Pools up to 60 ft

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Other Dolphin Triton PS Plus Robotic Pool Cleaner with PowerStream Technology for In-Ground Pools up to 50 ft Error Codes

APP-CONNECT

App Connection Failure

Brushes Not Spinning

Worn Scrubbing Brushes

2 fixes

CABLE-CORROSION

Cable Connector Corrosion

Cable Deterioration

Cable Tangling

Drive Motor Failure

Filter Basket or Bag Torn

2 fixes

People Also Ask About Dolphin Triton PS Plus Robotic Pool Cleaner with PowerStream Technology for In-Ground Pools up to 50 ft Error PSU-FAIL

What does error code PSU-FAIL mean on a Dolphin Triton PS Plus Robotic Pool Cleaner with PowerStream Technology for In-Ground Pools up to 50 ft?

Error code PSU-FAIL on the Dolphin Triton PS Plus Robotic Pool Cleaner with PowerStream Technology for In-Ground Pools up to 50 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

How do I fix error code PSU-FAIL on my Dolphin Triton PS Plus Robotic Pool Cleaner with PowerStream Technology for In-Ground Pools up to 50 ft?

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.

Is error code PSU-FAIL on a Dolphin Triton PS Plus Robotic Pool Cleaner with PowerStream Technology for In-Ground Pools up to 50 ft serious?

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

Can I fix Dolphin Triton PS Plus Robotic Pool Cleaner with PowerStream Technology for In-Ground Pools up to 50 ft error PSU-FAIL myself?

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

How much does it cost to repair Dolphin Triton PS Plus Robotic Pool Cleaner with PowerStream Technology for In-Ground Pools up to 50 ft error PSU-FAIL?

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

What other error codes does the Dolphin Triton PS Plus Robotic Pool Cleaner with PowerStream Technology for In-Ground Pools up to 50 ft have?

The Dolphin Triton PS Plus Robotic Pool Cleaner with PowerStream Technology for In-Ground Pools up to 50 ft has 8 other known error codes, including: APP-CONNECT (App Connection Failure), BRUSH-STOP (Brushes Not Spinning), BRUSH-WORN (Worn Scrubbing Brushes), CABLE-CORROSION (Cable Connector Corrosion), CABLE-DAMAGE (Cable Deterioration), and 3 more.

Which other Dolphin models have the PSU-FAIL error?

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, Liberty Cordless Battery-Powered Robotic Pool Cleaner with Multi-Layer Filtration for In-Ground Pools up to 40 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, and 2 more. The fix may vary by model, so check each model's specific page for tailored repair steps.

What other error codes does the Dolphin Triton PS Plus Robotic Pool Cleaner with PowerStream Technology for In-Ground Pools up to 50 ft have?

The Dolphin Triton PS Plus Robotic Pool Cleaner with PowerStream Technology for In-Ground Pools up to 50 ft has 8 other known error codes:

APP-CONNECT — App Connection Failure (2 fixes)
BRUSH-STOP — Brushes Not Spinning (2 fixes)
BRUSH-WORN — Worn Scrubbing Brushes (2 fixes)
CABLE-CORROSION — Cable Connector Corrosion (2 fixes)
CABLE-DAMAGE — Cable Deterioration (2 fixes)
CABLE-TANGLE — Cable Tangling (2 fixes)
DRIVE-MOTOR — Drive Motor Failure (2 fixes)
FILTER-DAMAGE — Filter Basket or Bag Torn (2 fixes)

Which other Dolphin models have the PSU-FAIL error?

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 (pool cleaner) · 2 fixes
EON 120d Robotic Pool Cleaner with DebrisLock Backwash Filter and SmartMap Navigation for In-Ground Pools up to 50 ft (pool cleaner) · 2 fixes
Liberty Cordless Battery-Powered Robotic Pool Cleaner with Multi-Layer Filtration for In-Ground Pools up to 40 ft (pool cleaner) · 2 fixes
Nautilus CC Plus Wi-Fi Robotic Pool Vacuum Cleaner with Wall Climbing and Scrubber Brush for In-Ground Pools up to 40 ft (pool cleaner) · 2 fixes
Nautilus CC Robotic Pool Vacuum Cleaner with Scrubber Brush for In-Ground Pools up to 33 ft (pool cleaner) · 2 fixes
Premier Robotic Pool Cleaner with Smart Navigation and Multi-Media Filtration for In-Ground Pools up to 50 ft (pool cleaner) · 2 fixes
Proteus DX3 Robotic Pool Cleaner with Active Scrubber Brush and Wall Climbing for In-Ground Pools up to 33 ft (pool cleaner) · 2 fixes
Sigma Robotic Pool Cleaner with Gyroscope Navigation and Triple Motor System for In-Ground Pools up to 60 ft (pool cleaner) · 2 fixes

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