Charger displays E14; internal relay test failed during self-check

Safety first: A welded contactor can leave the output live even when the charger indicates 'off'. Isolate power at the upstream breaker and verify de-energization before touching the cable or vehicle connector.

Step-by-step checks:

• 1. Verify de-energized output: With the charger commanded off, measure voltage at the Type 2 socket (qualified person only). There should be no line voltage present.
• 2. Listen and observe: During startup, listen for the contactor click. If E14 appears and the contactor does not operate as expected, suspect mechanical issues.
• 3. Inspect contactor (power off): Open the housing and visually inspect the main contactor for signs of overheating or melting.
• 4. Check auxiliary contacts: Many KEBA models use auxiliary contacts on the contactor for position feedback. Verify wiring and continuity of these auxiliary contacts.
• 5. Replace contactor: If contacts are welded or the mechanism is stiff, replace the main contactor and any associated auxiliary contact blocks.
• 6. Board diagnostics: If the contactor and auxiliaries are good, the relay test circuit on the main control board may be faulty and require board replacement.

Never attempt to file or repair welded contacts; always replace the contactor assembly.