Dolphin power supply blinking

dolphin

Double-check before purchasing

PSU blink codes vary between Dolphin PSU hardware revisions — check your specific unit's manual.

The Problem

A blinking light on your Dolphin power supply means the unit has detected a fault and cut output to protect the robot. The most common causes are a blocked impeller, cable damage, or a short circuit. In most cases you can identify and fix the cause in under 10 minutes without any tools.

Steps

1
Note the blink pattern on the PSU indicator if your unit uses blink codes. Refer to your PSU manual or the Maytronics support page for code meanings — these vary by unit.
2
Disconnect the robot from the PSU. Check whether the PSU light goes solid green. If it does, the fault is in the cable or robot — not the PSU itself.
3
Inspect the full cable for visible damage: cuts, sharp kinks, cracked insulation, or fraying near the connectors.
💡 The section near the robot swivel connector flexes most during use — start your inspection there.
4
Remove the robot from the pool and clear all debris from the impeller, filter basket, and drive wheels. Confirm the impeller spins freely by hand.
5
Reconnect the robot and retry. If the PSU light goes solid, the blockage was the cause.
6
If still blinking, disconnect from mains, wait 5 full minutes, then reconnect. This resets the PSU's internal protection circuit.
7
Test on a different mains socket. If the PSU continues blinking with a confirmed fault-free robot and cable, replace the power supply unit.
💡 Do not continue using a blinking PSU — it indicates an active fault that could damage the robot's motor over time.

Possible Causes & Solutions

common

Blocked impeller triggering overload shutoff

Remove the robot from the pool and clear any debris from the impeller and drive wheels. Spin the impeller by hand to confirm it rotates freely. Reconnect and retry.

common

Cable damage or short circuit

Inspect the full cable length for cuts, sharp kinks, or exposed wiring. Damage anywhere in the cable can trigger the PSU safety circuit.

occasional

Corrosion or damage at the swivel connector

Inspect the cable connector at the robot end. Corroded or bent pins create resistance or a partial short that triggers the blink fault. Clean carefully or replace the connector.

occasional

Water exposure to the PSU

The PSU should be kept away from pool splash zones and rain. If exposed to water, allow it to dry fully in a warm, dry location for at least 24 hours before retesting.

rare

Internal PSU component failure

If all external checks pass and the PSU still blinks, the unit itself has an internal fault. Replace the power supply — do not attempt to open or repair PSU internals.

rare

Mains supply issue

Try a different mains outlet on a separate circuit. A surge or unstable supply can trigger the PSU protection circuit.

When to Replace

Replace the power supply if the reset procedure does not clear the fault after confirming the cable and robot are fault-free. Replace the cable immediately if physical damage to the insulation is found — never use a damaged cable in a pool. Replace the swivel connector if pins are corroded or bent.

Where to Buy

Find compatible replacement parts from these retailers:

Check price for dolphin replacement parts on Amazon

Compatible Parts

Maytronics Dolphin replacement power supply

PSU models vary across the Dolphin range. Match the replacement using your existing unit's label or the model reference on your robot.

Swivel cable connector

Fits most Dolphin cable assemblies. Sold separately from the full cable.

Full cable assembly

Available in different lengths. Confirm the correct cable length for your model before ordering.

Frequently Asked Questions

My PSU blinks repeatedly in a pattern. What does it mean?

Blink codes vary between Dolphin PSU models. Check your specific unit's manual or the Maytronics support site for the correct code reference. In general, rapid blinking indicates a short circuit or overload, while slower patterns may indicate other faults.

Can I use a third-party power supply with my Dolphin?

Not recommended. Dolphin robots are designed to work with Maytronics power supplies. Using a non-OEM PSU can damage the drive motors and will void any remaining warranty.

The PSU only blinks when the robot is in the water. On dry land it is fine.

This strongly suggests water ingress through a damaged seal. The water creates a conduction path that triggers the protection circuit. Remove the robot immediately and inspect all motor and access panel seals before using it again.