Kubota controller displays E14 and the generator will not accept load from the automatic transfer switch.

Safety first: This fault involves interaction with the utility supply. Only qualified personnel with proper PPE should work on transfer and synchronization issues.

• Verify generator output: With the generator running and isolated from the load, measure line-to-line voltage and frequency. Confirm they match the system requirements (e.g., 240/120 V, 60 Hz).
• Check phase rotation: Use a phase rotation meter at the generator output and compare to the utility side. If rotation differs, swap two phases at the generator output (three-phase systems only).
• Inspect transfer switch wiring: Verify that the Kubota controller start/stop and position feedback wires are correctly landed on the ATS terminals per the wiring diagram.
• Controller configuration: In the Kubota controller, confirm that voltage, frequency, and phase settings match the generator and site configuration. Incorrect settings can inhibit transfer.
• Test ATS operation: Manually operate the transfer switch (if allowed by manufacturer) to confirm mechanical freedom. A jammed mechanism can cause the controller to log a transfer fault.