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Mitsubishi PAC-US444CN-1 Dip switch configuration

I want to change the dip switch of the Mitsubishi PAC-US444CN-1 to shut off right away when the temperature is met. It’s states SW1-1 should be on and SW1-2 should be on. I’m not understanding what that should be. Attached are some pictures with the instructions.


  • plandisplandis Member Posts: 6
    edited August 2019
  • GWGW Member Posts: 3,766
    Sorry I haven’t done one of these yet. Mitsubishi Rep says you lose some diagnostic capabilities and some of the finer “variable capacity” features.
    Gary Wilson
    Wilson Services, Inc
    Northampton, MA
    [email protected]
  • ratioratio Member Posts: 2,482
    plandis said:

    Do I turn these 2 on?

    Yes. SW1 is a 4 position DIP switch block, numbered 1..4 on the face of it. Remove power, flip those two switches on, & reapply power. (The bigger 8 position switch block is marked SW2, you can just make it out under the black X on the top of the picture.)

    FWIW, you may be able to find a service guide to that part at, which may give you more information about what each setting does & how they interact.

  • plandisplandis Member Posts: 6
    So when you mean switch those two switches, the ones labeled 1 and 2 on the SW1 block?
  • ratioratio Member Posts: 2,482
    plandis said:

    So when you mean switch those two switches, the ones labeled 1 and 2 on the SW1 block?

    Yes. Push the little sliders marked 1 & 2 towards ON. You should feel a slight (or possibly more pronounced) click when they move—but not all have this feature! If you don't feel a click, flip them back to off & then back on again. I have, occasionally, had these style fail to make the electrical connection. A double flip generally fixed it.
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