Dolphin power supply 1 blink

dolphin

Double-check before purchasing

The exact meaning of a single blink varies between Dolphin PSU generations and models — consult your model-specific manual to confirm whether 1 blink is standby or a fault code.

The Problem

A single blink on a Dolphin power supply LED is usually a normal standby or power-on signal — not a fault. However, if the robot fails to start despite the PSU showing one blink, the issue is downstream: the cable connection, the cycle start button, or the robot itself.

Steps

1
Confirm the single blink is a slow, regular pulse — not rapid flashing. A slow single blink typically means standby mode, not a fault.
2
Press the cycle start button on the PSU. The robot should start within 10 seconds of the button press.
3
If the robot does not start, disconnect the cable from the PSU, inspect the connector, and reconnect firmly.
4
Perform a full reset: unplug the PSU from the wall, disconnect the cable, wait 90 seconds, reconnect, and retry.
5
If the PSU shows one blink with no cable attached, the PSU is in standby — connect the cable and robot to initiate a cycle.
6
If the robot still does not respond after reset, the fault is in the robot or cable rather than the PSU — see the robot not turning on guide.

Possible Causes & Solutions

common

Single blink is the PSU standby or ready indicator (normal)

On many Dolphin PSU models, one slow blink means the unit is powered and waiting for a command. Press the cycle start button or the scheduled cycle should begin automatically.

common

Cable connector not fully seated — PSU ready but no load detected

Disconnect the floating cable from the PSU, inspect the connector pins for corrosion, and reconnect firmly until the connector is fully seated. A loose connection prevents the PSU from recognising a connected robot.

occasional

Robot not responding to the start command

If the PSU shows one blink and the cycle button is pressed but the robot does not move, try a full reset: unplug the PSU from the wall, disconnect the cable, wait 90 seconds, reconnect, and restart.

occasional

PSU in diagnostic or paused state after a previous fault

A single blink after a prior multi-blink error code can indicate the PSU has cleared the fault but is waiting for confirmation. Perform a full power cycle before attempting the next run.

When to Replace

A single-blink PSU in standby mode does not indicate a fault requiring replacement. If the PSU shows one blink but never initiates a cycle despite correct cable connection and robot placement, contact Maytronics support.

Where to Buy

Find compatible replacement parts from these retailers:

Check price for dolphin replacement parts on Amazon

Frequently Asked Questions

Is 1 blink on my Dolphin PSU an error?

Usually not. On most Dolphin PSU models, a single slow blink indicates standby or ready state. It becomes a problem only if the robot fails to start when commanded.

How is 1 blink different from 2 or 3 blinks?

2 blinks typically signals a cable or connection fault, and 3 blinks an overcurrent fault. A single blink is a lower-severity signal and is normal on many units.

My PSU shows 1 blink and then nothing happens — what do I do?

Press the cycle start button. If the robot still does not respond, check the cable connection. If the connector is clean and firmly seated, perform a full 90-second reset.