Charger shows E13; internal fan or cooling system error (on models with active cooling)

Safety first: Disconnect mains power before opening the charger. Moving fan blades can cause injury.

Step-by-step checks:

• 1. Listen for fan operation: During charging at higher currents, you should hear the internal fan run (if your KEBA model uses one). If E13 appears and the fan is silent, suspect a fan fault.
• 2. Inspect vents: Check all ventilation openings for dust, spider webs, or debris. Clean gently with a soft brush or vacuum.
• 3. Internal inspection (power off): Open the housing and locate the fan. Spin the blades gently by hand to ensure they move freely and are not obstructed.
• 4. Check fan connector: Reseat the fan's power connector on the main control board. Inspect the cable for damage.
• 5. Voltage test (qualified person): With power applied and a charging session active, measure the voltage at the fan connector. If voltage is present but the fan does not run, replace the cooling fan. If no voltage is present, the fan driver on the main board may be defective.
• 6. Replace main board if needed: If the fan is good but not being driven, replace the main control board or dedicated fan controller module.

Do not operate the charger at high current without a functioning cooling system.