Generator shuts down, controller shows E-14, no obvious engine issue

Safety: High fault currents are dangerous. Isolate the generator and building load before inspection.

• Review load: Check what equipment was running when the trip occurred. Large motors or electric heaters may exceed the generator's capacity.
• Inspect main breaker: With power off, inspect the generator main breaker for signs of overheating or mechanical damage. Exercise the breaker (OFF/ON) several times.
• Check for downstream faults: Inspect the load panel and transfer switch for tripped breakers or signs of short circuits (burn marks, smell). Correct any wiring faults before re-energizing.
• CT wiring: Verify that the current transformer leads are correctly connected to the controller and not reversed or shorted.
• Test with reduced load: Run the generator and gradually add load while monitoring current on the controller. Keep total load within the nameplate rating.

If E-14 recurs at normal load levels, the breaker or sensing circuitry may be faulty and should be evaluated by a CAT technician.