Controller shows F14 Emergency Stop Input Active even though E‑stop button appears released.

Safety first: Disable auto-start and isolate AC power. Verify the generator cannot start unexpectedly.

• Inspect E‑stop enclosure: Open the E‑stop switch housing and check for moisture, corrosion, or insect nests. Dry and clean the interior, then reassemble.
• Check wiring insulation: Follow the E‑stop cable from the switch to the controller. Look for crushed or abraded sections where the conductor may be shorting to the metal frame. Repair or replace damaged cable.
• Test switch function: Disconnect the E‑stop wires at the controller and test the switch with a multimeter. Verify that the contact state changes correctly between pressed and released. Replace the switch if readings are inconsistent.
• Bypass test (temporary, technician only): For diagnostic purposes, a technician may temporarily install a jumper at the controller E‑stop input to simulate a healthy circuit. If F14 clears, the wiring or switch is at fault. Remove the jumper after testing and restore proper safety wiring.
• Controller input check: If F14 remains with known-good wiring and switch, the controller input may be damaged and require replacement.