Warning Description

The CCR has determined an error with the input card on the DCMU. When the CCR determines a warning or setpoint alarm, it will engage the indicator light and the warning will be shown on line 1 of the CCR display. The CCR will continue to operate in the event of a warning. Although the CCR will continue operating, warning conditions must still be noted and fixed. Allowing the CCR to operate in a warning state may cause problems for efficiency, general safety, and longevity of equipment.

Attempt to Correct

Always maintain safe working conditions by using appropriate personal protective equipment (PPE) where necessary.
Turn off power to the CCR.
Once power has discharged and all LEDs are out, remove the green terminal blocks from the bottom of the DCMU.
Ensure all screws are tight.
Reinstall the terminal blocks.
Ensure they are seated fully.

Airport Lighting Company | Type L-828, Type L-829 Ferroresonant Constant Current Regulator