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Thread: York ysbbs1

  1. #1
    Join Date
    Oct 2004
    Location
    toledo, ohio
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    73
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    York ysbbs1

    Slide valve while running loads and unloads. Solenoids check out good. On shut down when oil pressure drops off spring not overcoming force to close so it is sitting above the min. 10% needed to start back up in the a.m. isolate unload feed to valve at block and bleed pressure then slide valve will return closed. Any thoughts other than busted or worn spring?

  2. #2
    Join Date
    Mar 2007
    Location
    BC,Canada
    Posts
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    Could try sv potentiometer calibration-trick it to think sv is at 0% even if its not completely closing.(as a temporary solution)
    Do a search online,calibration sheet is floating around net.


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  3. #3
    Join Date
    Mar 2007
    Location
    BC,Canada
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    Also see this



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  4. #4
    Join Date
    Oct 2004
    Location
    toledo, ohio
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    Thread Starter
    Thank you both. I will check jumper and EPROM version. I didn't want to mess with the pot due to sometimes it will stick around 60 %. F***ING thing. Had a slide rebuild about 10years ago. I am going to try scheduling off twice a day for twenty minutes or so to keep a load on it. 30,000 sq foot office with 20 people and 2 air handlers in it. Smh.

  5. #5
    Join Date
    Mar 2007
    Location
    BC,Canada
    Posts
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    Good luck.A couple of pages if u dont have (fine adjustment just tweaks the single line display microboard pot)





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  6. #6
    Join Date
    Mar 2007
    Location
    BC,Canada
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    2nd
    Attached Thumbnails Attached Thumbnails F5824F31-A549-495D-B2B2-2C17120ECDD2.jpg  

  7. #7
    Join Date
    Mar 2007
    Location
    BC,Canada
    Posts
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    Also check 2sol (off cycle sv oil equalization solenoid)


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  8. #8
    Join Date
    Mar 2007
    Location
    BC,Canada
    Posts
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    Oops...just read that u checked solenoids


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