Charger indicates E08; dynamic load management or external current sensor not recognized

Safety first: CTs are installed on live mains conductors. Only qualified electricians should work on them. Isolate circuits where possible.

Step-by-step checks:

• 1. Check configuration: In the KEBA configuration, verify that external current measurement is enabled only if CTs are actually installed. If not used, disable the feature to clear E08.
• 2. Inspect CT wiring: Trace the CT cables from the main distribution board to the KEBA charger. Look for loose terminals, damaged insulation, or incorrect terminal assignments.
• 3. Verify CT orientation: Ensure that CTs are installed with the correct direction (marked arrow towards load or supply as specified). Incorrect orientation can cause invalid readings.
• 4. Measure CT output: With appropriate equipment, measure the CT secondary current or voltage under load to confirm operation. Compare with expected values.
• 5. Check CT input terminals: With power off to the charger, tighten CT input terminals on the KEBA control board and inspect for corrosion or damage.
• 6. Replace faulty components: Replace a defective external current transformer or, if the CT is good but not detected, replace the KEBA load management / CT input board or main control board.

Incorrect CT wiring can lead to unsafe overloading if load management is relied upon. Verify operation thoroughly after repair.