Firman Auto-Start Scheduling / Exercise Timer Fault

Generator fails to start automatically during scheduled exercise runs, but starts manually.

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Possible Causes

Incorrect exercise schedule settings, Disabled auto mode, Faulty real-time clock in controller, Low battery at scheduled time

How to Fix / Troubleshooting

Safety first: Ensure the generator is safe to operate and ATS is functioning correctly.

  • Verify AUTO mode: Confirm the Firman controller is set to AUTO, not MANUAL or OFF.
  • Check exercise settings: Enter the controller menu and review the exercise day, time, and duration. Correct any errors and save settings.
  • Confirm clock accuracy: Ensure the controller's date and time are correct; adjust if necessary.
  • Check battery health: A weak battery may fail to crank at the scheduled time. Test and replace if needed.

After adjustments, monitor the next scheduled exercise to confirm proper automatic starting.

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Repair Difficulty

Very Easy 1/5

Required Part

Generator Controller
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