Charger shows E09; app may indicate "RCD self‑test failed" or similar; unit refuses to charge.

Safety first: An RCD that fails self‑test must be treated as non‑functional. Do not bypass or override RCD protection.

• Visual inspection: With power isolated, inspect the internal RCD or combined RCBO module for signs of overheating, burning, or mechanical damage.
• Check wiring: Confirm that line and neutral conductors are correctly routed through the RCD as per Rolec wiring diagrams. Incorrect routing can cause self‑test failures.
• Manual RCD test (if applicable): If the RCD has a physical test button, restore power and press the test button to verify that it trips. If it does not trip, the RCD is faulty and must be replaced.
• Reset and re‑test: After any wiring corrections, reset the RCD and power‑cycle the charger. If E09 remains, the RCD or its self‑test circuit is defective.
• Replace RCD module: Install a Rolec‑approved replacement RCD/RCBO module of the same rating and type. Perform full functional and safety tests after replacement.