Control panel shows LC and buttons do not respond.

Steps:

• Unlock sequence: On many Olimpia Splendid units, press and hold the "Lock" or a combination of keys (often "+" and "-" or "Mode" and "Timer") for 3–5 seconds to clear LC. Refer to the user manual for the exact combination.
• Power reset: If the lock will not clear, unplug the unit for 5 minutes and try again.
• Check buttons: If some buttons are physically stuck, clean around them with a soft cloth slightly dampened with mild detergent. Do not allow liquid to enter the control panel.
• Keypad replacement: If the keypad membrane is faulty and randomly triggers LC, the display/control PCB may need replacement.