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    How to Define System Fault 021 on DS9400 Series & D7024

    Issue

    What is a system trouble 021?

    Solution

    A System Trouble 021 means that NAC 1 has open wiring.

    A list of all possible system trouble codes can be found on the last page of Appendix C in the Operation and Installation Guide .

    Part numbers D7024, DS9400, DS9400I, DS9400M,

    Version history
    Last update:
    ‎05-25-2018 03:31 PM
    Updated by:
    Anonymous
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