Troubleshooting · Power & Connectivity
Why is my Dolphin not responding or showing a communication error?
Short answer: Check the blue cable connection, then test the robot in the app; if the Communication Error returns, the robot needs repair.
Check that the blue cable is firmly plugged in, and inspect the cable for damage.
Based on Maytronics support, updated 2026-04-26, rewritten by Poolbots' pool experts.
The fix
Step by step.
This error in the My Dolphin Plus App means the blue cable is having trouble carrying the app's commands from the power supply to your Dolphin robot.
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Step 1Check the blue cable
Confirm that the blue cable is firmly plugged in. Inspect the cable for damage.
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Step 2Test the robot
Put the robot in the pool. In the app, try Manual Drive or select another cleaning mode, if available.
If the Communication Error appears again, the communication problem is still present and the robot needs repair.
For repair help, chat with Poolbots' pool experts, including if you purchased your robot through a local dealer. For warranty repairs, Poolbots will point you to Maytronics' service process.
You can submit a warranty claim to send your robot to a Maytronics service center for repair.
Source: Maytronics support. Same steps and facts, rewritten for clarity; the videos and illustrations are Maytronics' own.
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