Generator cranks normally but will not start, no error code displayed on Atlas Copco controller

Safety first: Disable automatic start and ensure the generator cannot start unexpectedly while you work.

• Confirm basics: Verify fuel level, battery voltage, and that the emergency stop is reset.
• Bleed fuel system: Loosen bleed screws on the fuel filter and injection pump. Operate the manual priming pump until fuel free of air bubbles flows, then retighten.
• Replace fuel filters: If service is overdue or fuel contamination is suspected, replace primary and secondary fuel filters.
• Check stop solenoid: Observe the fuel stop solenoid or actuator during crank. It should pull to the run position. If not, test for voltage and replace the solenoid if defective.
• Compression check (advanced): If the engine has high hours and still will not start, a compression test by a technician may be required.