DIAGNOSTIC LED ACTIVE
trouble

Simplex 4100ES

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What This Code Means

The system diagnostic LED is currently active, indicating a diagnostic process is running or a hardware fault is being signaled.

Common Causes

  • 1Active diagnostic test
  • 2Hardware fault
  • 3System startup sequence

Resolution Steps

Check the diagnostic logs to identify the specific test or fault and clear any active diagnostic modes.

Manual References(3)

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