Controller shows E-16, engine stops, no other obvious alarms

Safety: Identify and correct the external condition (fire, gas leak, etc.) before attempting to restart. Disable automatic start.

• Review external systems: Check building fire alarm, gas detection, and fuel leak detection systems for active alarms that may be wired to the generator shutdown input.
• Inspect external shutdown terminals: Locate the external shutdown input on the controller. Verify wiring is intact and not shorted to ground.
• Temporarily isolate input (for testing only): If permitted by site policy, disconnect the external shutdown wires and install a temporary jumper to simulate a normal condition. If E-16 clears, the issue is external.
• Check controller configuration: Ensure the digital input is configured correctly (normally open/closed) per the external device's design.
• Restore normal wiring: Remove any test jumpers and reconnect the external shutdown circuit once the root cause is found.

Do not permanently bypass safety shutdowns. If the cause cannot be identified, involve a CAT technician and the building safety system vendor.