Maytronics Dolphin robotic pool cleaners are popular for their efficiency in keeping pools clean. However, like any electronic device, they may encounter issues with their power supply units (PSUs). This guide will help you troubleshoot common problems with your Dolphin's PSU.

Power Supply Unit Won't Turn On

If your Dolphin's PSU doesn't power up, follow these steps:

1. Check the GFI outlet: Ensure the outlet is functioning by plugging in another device, such as a phone charger or lamp.
   
2. Inspect the blue cable: Unplug the blue cable from the PSU and attempt to turn it on. If the PSU powers up with lights on, the issue may be with the cable or the cleaner itself. Browse replacement communication cables or find your communication cable on our Maytronis robotic cleaner parts diagrams (see also Hayward, Pentair, AquaBot, Hammerhead, and Polaris / Zodiac).
   
3. Consider replacement: If the "POWER/ON" button doesn't light up at all, you might need a new power supply unit. Browse power supply units for robotic cleaners or find your power supply on our Maytronis robotic cleaner parts diagrams (see also Hayward, Pentair, AquaBot, Hammerhead, and Polaris / Zodiac).

Power Supply Turns On, But Dolphin Doesn't Move

If your PSU is working but the Dolphin remains stationary, try these troubleshooting steps:

1. Examine the cable: A faulty cable could prevent the Dolphin from moving.
2. Check for obstructions: Inspect the drive train and impeller for debris or damage (browse robotic cleaner replacement parts).
3. Perform visual inspection: Unplug the cleaner and look for visible debris around the impeller and tracks/brushes. Remove any obstructions and ensure the impeller blades are intact.
4. Test brush rotation: Turn the cleaner over and rotate the brushes by hand. They should move freely without resistance or unusual sounds.
5. Clean the tracks: Use a water-jet sprayer to thoroughly clean the tracks from front to back, dislodging any debris.

Out-of-Water Self-Test

If the above steps don't resolve the issue, perform an out-of-water self-test:

1. Place the cleaner upside down on dry land and turn on the power supply.
2. Listen for the impeller fan to spin for 10-15 seconds (a soft, high-pitched whine).
3. Observe if the tracks move forward, then reverse and go backward.
4. Turn the unit off.

If the Dolphin passes this test, try it in the pool again. If it fails, professional assistance may be required.

Additional Troubleshooting Tips

• Avoid extension cords: Always plug the PSU directly into a GFI outlet. Dolphins are not designed for use with extension cords or surge protectors.
  
• Check voltage output: Use a multimeter to measure the PSU's voltage output. It should be between 27 and 30 volts DC.
  
• Inspect both ends of the cable: If the PSU shows correct voltage, check the voltage at the cleaner end of the cable to ensure proper transmission.
  
• Review settings: Ensure your Dolphin isn't set to a short cleaning cycle or affected by remote control settings.

Other Robot Brands

• AquaBot Robot Parts
• Hayward Robot Parts
• Pentair Robotic Cleaner Parts
• Polaris & Zodiac Robot Parts

Other Robot Cable Brands

• Hammerhead Robot Parts
• Pentair Robotic Cleaner Parts

If you need to replace your Maytronics Dolphin power supply, please consider adding an Extend protection plan to add years onto the manufacturer's warranty. This will protect your power supply and ensure your robot's power supply will be covered.

If these steps don't resolve the issue, it's advisable to contact EZ Pool & Spa Supply, an authorized Maytronics dealer and repair center, for further assistance. We can perform more advanced diagnostics and repairs if necessary.

Remember, proper maintenance and careful handling of your Dolphin cleaner and its PSU can help prevent many common issues and extend the life of your pool cleaning equipment.