E8 displayed; machine may not dose detergent or rinse aid correctly, or chemical alarms are active.

Safety first: Wear gloves and eye protection when handling detergents and rinse aids.

• Check chemical levels: Verify that the external detergent and rinse aid canisters are not empty. Refill with Winterhalter-approved products.
• Inspect suction hoses: Ensure the suction hoses are fully submerged and not kinked. Clean or replace the small suction filters at the end of the hoses.
• Prime the pumps: Use the machine's dosing test/prime function (if available) to draw chemicals through the lines until no air bubbles are visible.
• Check for leaks: Inspect around the peristaltic pumps for leaks or cracked tubing. Replace worn pump tubes or the complete pump if it does not run during dosing tests.