SL-2000 is powered but no lights are showing

  • Check power is good, probe across terminals 9 and 10, check for roughly 24V.
  • Check the detector head is seated, rotate counterclockwise and reattach it by turning clockwise until it’s seated.
  • Check transparent lid, ensure it is fitted and not ajar and all screws are tightened, SW1 can be inspected for damage if the lid has been installed incorrectly previously.

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