Green light: Flashing indicates normal operation. If not on or constantly on, it indicates abnormal operation.
Yellow light off, red light flashing: Long delay fault.
Yellow light flashing, red light off: Overload warning (slow flashing represents greater than 90% of the long delay setting value; fast flashing represents greater than the long delay setting value).
Yellow light on, red light flashing: Short delay fault.
Yellow light on, red light on: Ground fault.
Flashing yellow light and flashing red light: Instantaneous fault.

Communication Indication: If a cabinet door unit is present, communication with it is indicated regardless of an upper computer. If no cabinet door unit exists but an upper computer is active, it indicates communication with the upper computer.