Charger displays E10; internal power supply error, LEDs may flicker or be off

Safety first: Isolate mains power before opening the charger. Capacitors in the power supply can retain charge; wait a few minutes after disconnection.

Step-by-step checks:

• 1. Confirm supply voltage: Verify that correct mains voltage is present at the charger input. If the supply is missing or unstable, correct that first.
• 2. Visual inspection: Open the housing and locate the low-voltage power supply section on the main control board or separate PSU module. Look for bulging capacitors, burn marks, or cracked components.
• 3. Check low-voltage outputs: With appropriate caution and only if qualified, power the unit and measure the low-voltage rails (e.g., 5 V, 12 V) at test points or connectors. Deviations indicate PSU failure.
• 4. Disconnect peripherals: To rule out a short on a peripheral, disconnect non-essential modules (RFID, communication board, display) and see if E10 clears.
• 5. Reseat connectors: With power off, reseat all low-voltage connectors between the PSU section and other boards.
• 6. Replace PSU/main board: If the auxiliary supply is defective, replace the main control board or dedicated power supply module according to KEBA service instructions.

Do not attempt component-level repair of the PSU unless you are an electronics specialist and local regulations permit it.