E030
EVBox
Internal CAN/I2C/SPI Bus Fault
Charger displays E030; app indicates internal communication bus error between control and power boards.
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Safety Warning
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.
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Possible Causes
Loose inter‑board connector, Damaged ribbon cable, Faulty transceiver IC on either board, Electrical noise or surge damage
How to Fix / Troubleshooting
Safety: Internal boards carry hazardous voltages; only qualified technicians should service them.
- Power off: Switch off the breaker and wait for internal capacitors to discharge.
- Inspect interconnects: Open the unit and locate the cable or connector linking the control and power boards. Reseat and secure it.
- Check for damage: Look for burn marks or cracked components near the communication transceivers.
- Test after reassembly: Restore power and check if E030 clears.
- Board replacement: If the error persists, replace the affected board(s) as a matched set if recommended by EVBox.
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Repair Difficulty
Professional Required
5/5
Required Part
EVBox Control‑to‑Power Board Harness
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