Charger shows E025; LED ring is red; app indicates internal self-test failure at startup.

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Defective RAM or microcontroller on PCB, Failed ADC or sensor channel, Internal bus error, Manufacturing defect or severe surge damage

Safety first: Do not attempt to bypass self-test protections.

Power cycle: Turn the charger off at the breaker for 5 minutes, then on. Observe whether E025 recurs immediately.
Check environment: Ensure the unit is not exposed to extreme temperatures or moisture that could affect electronics.
Firmware reload: If possible, perform a firmware reinstallation via the installer tools to rule out software corruption.
Board replacement: Persistent E025 indicates a hardware fault on the main control PCB. Replace the board as a complete assembly.

Professional Required 5/5

Main Control PCB

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