Controller displays AL19 – Fuel Leak Detected (if leak sensor fitted)

Safety first: Stop the generator immediately. No smoking or ignition sources near the set. Use absorbent pads to contain any spill.

• Locate the leak: Inspect under the base frame, around the fuel filters, injection pump, and hoses for wet diesel. Follow the smell and visible wet areas.
• Check leak sensor: Many FG Wilson sets have a leak tray with a float switch. Inspect the tray for fuel and the switch for correct operation.
• Tighten fittings: Carefully tighten hose clamps and threaded fittings at the leak point. Do not overtighten plastic components.
• Replace damaged parts: Replace cracked hoses, filters, or tank fittings. Use FG Wilson-approved fuel hose rated for diesel.
• Clean up: Remove spilled fuel with absorbent material and dispose of it according to local regulations. Reset the leak sensor and clear the alarm before restarting.