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    How to Troubleshoot AC Fail DS7400 Series

    Issue

    Control trouble # 87 displays, AC Power failure.

    Solution

    Probable Cause:

    • The transformer is unplugged.
    • The wiring from the transformer is defective.
    • The transformer is defective.
    • The transformer may be connected to a circuit controlled by a switch or a circuit breaker that is periodically turned off.

    Possible Solution:

    • Plug in the transformer.
    • Check the wiring.
    • Check the circuit and circuit breakers.
    • Replace the transformer.
    • Connect to a circuit that is not controlled by a switch or circuit breaker that is periodically turned off.

    Part numbers DS7400X, DS7400, DS7400Xi, DS7400XIVER2, DS7400XIVER3+, DS7400XIVER4

     

    Version history
    Revision #:
    1 of 1
    Last update:
    ‎06-08-2018 04:07 PM
    Updated by:
     
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