Troubleshooting guide
Dolphin power supply beeping
Double-check before purchasing
- Audible beep codes are not consistent across all Dolphin PSU models and generations. This guide describes common patterns — consult your model-specific manual for exact beep code meanings.
The Problem
Some Dolphin power supply models emit audible beeps or clicking sounds to signal faults or operational states. A single beep on start is often a normal operational sound. Repeated beeping or clicking during a cycle indicates a fault condition — the same fault that would be shown as a blink code on the LED indicator.
Steps
- 1
Note the beep pattern — count the number of beeps and the interval. This maps to the same fault code as the LED blink sequence.
- 2
If the LED is also blinking, count the blink sequence and cross-reference with the blink code guides.
- 3
If beeping occurs with no cable attached, the PSU itself has a fault.
- 4
Perform a full reset: unplug the PSU from the wall, disconnect the cable, wait 90 seconds, reconnect, and test.
- 5
If beeping continues after reset with a clean cable connection, contact Maytronics support with your model number and the beep count.
Possible Causes & Solutions
Single beep on startup — normal power-on or cycle-start confirmation
Many PSU models emit a brief beep or click when power is applied or a cycle starts. If the robot subsequently runs normally, this is not a fault.
Repeated beeping alongside a blinking LED — fault code signal
Some Dolphin PSU models use both audible beeps and LED blinks to communicate the same fault code. Count the beeps — they typically correspond to the same numbers as the LED blink code (e.g., 2 beeps = cable/connection fault).
Clicking relay sound under load — normal in some PSU models
Some PSU models include a mechanical relay that makes a clicking sound when switching the robot motor on. A single click at cycle start or end is normal. Rapid or continuous clicking indicates a fault.
Continuous or erratic beeping — PSU overheating or internal fault
A PSU that beeps continuously or erratically is signalling an active fault. Move it to shade, allow it to cool, perform a full reset, and check cable connections before retrying.
When to Replace
Continuous or repeated beeping that does not resolve after cable inspection and a full reset indicates a fault requiring professional diagnosis or PSU replacement.
Where to Buy
Find compatible replacement parts from these retailers:
Frequently Asked Questions
Do all Dolphin PSUs beep?
No. Audible alerts are model-dependent. Older and entry-level PSU models may have LED indicators only. Mid-range and newer models are more likely to include audible fault signals.
How many beeps does a cable fault make?
On models where beeps mirror LED blink codes, a cable fault typically produces 2 beeps. Count carefully — the beep count corresponds directly to the fault code number.
My PSU clicks once when I start it — is this normal?
A single click at cycle start is normal on relay-switched PSU models. It is the sound of the relay engaging the motor circuit. It is not a fault.
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