E08
Jaguar
Protective Earth Monitoring Failure
Display shows E08; charger powers up but cannot start a session; app may report ‘Ground fault / PE error’.
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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
Broken or high-resistance earth conductor, Incorrect bonding of earth at supply, Faulty earth monitoring circuit on Jaguar PCB, Corroded earth terminal inside wallbox
How to Fix / Troubleshooting
Safety first: A missing or faulty earth is dangerous. Do not use the charger until the issue is resolved.
- Step 1 – Visual check: Inspect the earth conductor from the distribution board to the Jaguar wallbox. Look for cuts, loose terminations, or corrosion.
- Step 2 – Tighten earth terminals: With power OFF, tighten the earth terminal screw inside the charger and at the upstream isolator.
- Step 3 – Continuity test: A qualified person should measure earth continuity between the charger earth terminal and the main earth bar. Resistance should be very low (per local regulations).
- Step 4 – Check bonding: Ensure the charger’s earth is correctly bonded to the building’s protective earth system, not to a separate or floating earth.
- Step 5 – PCB earth monitor: If earth continuity is good but E08 persists, the earth monitoring circuit on the Jaguar control PCB may be defective and require replacement.
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Repair Difficulty
Professional Required
5/5
Required Part
Jaguar Wallbox Earth Monitoring Circuit / Earth Terminal Block
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