Charger shows E07; fan may run at high speed or unit feels unusually warm to the touch.

Safety first: Overheating can damage internal components. Allow the unit to cool before touching or opening.

• Check ventilation: Ensure the charger is not covered, boxed in, or exposed to direct sunlight for long periods. Clear any obstructions around vents or cooling slots.
• Inspect for dust and debris: With power isolated and cover removed, gently blow out dust from the PCB, contactor, and fan using dry compressed air. Do not use liquids.
• Verify fan operation: On models with an internal fan, observe whether the fan spins when the charger is active (qualified person only). A seized or noisy fan should be replaced.
• Check temperature sensor connections: Some Rolec units use thermistors attached to the contactor or PCB. Ensure these sensors are firmly attached and their connectors are secure.
• After cooling: Power‑cycle the charger and attempt a lower‑current charge (if adjustable). If E07 recurs quickly, the temperature sensor or control PCB may be faulty and require replacement.