E06
BYD
Input Undervoltage Protection
Charger shows E06 and stops charging; may occur during low grid voltage periods or when large loads start in the home.
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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
Supply voltage below BYD charger minimum, Undersized or excessively long supply cable causing voltage drop, Loose line or neutral terminal in charger input block, Faulty input voltage sensing circuit
How to Fix / Troubleshooting
Safety first: Turn off power at the breaker before tightening any terminals.
- Check household load: Turn off large appliances (HVAC, ovens) and retry charging to see if E06 disappears, indicating voltage sag.
- Inspect supply cable size: Have an electrician verify that the cable gauge matches BYD’s installation manual for the charger’s rated current and run length.
- Tighten terminals: With power off, a qualified person should check and tighten line and neutral screws in the charger’s input terminal block.
- Measure voltage under load: An electrician should measure voltage at the charger while it attempts to start charging. If it drops below spec, upgrade wiring or supply.
- If supply is stable but E06 persists: The voltage sensing circuit on the main control PCB may be faulty and need replacement.
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Repair Difficulty
Hard
4/5
Required Part
Input Terminal Block
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