had a walk in cooler that kept tripping out on DLL, discharge line temp, lock out, I finally replaced controller with mechanical psi switches. the old controller would have intermittent faults, because it would no longer cycle the condenser fan motors correctly.

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49 thoughts on “Walk in cooler with DLL fault code

  1. G N says:

    Is that the neighborhood grocery store where you demonstrated fan cycling with a piece of cardboard? And now it's going mechanical lol Is Biden running Emerson?

  2. jesse says:

    I have so much to learn when it comes to walk in boxes. We never had many calls on walk ins, but as our company grows, the calls are coming in. Great video Dave, keep up the good work.

  3. Jake M says:

    I've had issues with those. Referring to the high discharge temperature thermistor when a freezer is doing a hot pull down.
    Sometimes the condensing unit is slightly undersized by the installer. So when I run into that I just quote to go mechanical or for the mentioned issue I put the discharge sensor on the liquid line lol

  4. king Rum says:

    Hello Dave. Do we know each other don't know. I've been doing commercial in the Bay Area since 93. I Enjoy watching your videos. I'm the last one of a group of people I worked with who have passed on. I tried a procedure on a Hoshizaki I saw you repair on a bigger unit. Turned out great πŸ‘

  5. Frost HVAC says:

    Some old Master Bilt condensers do the same set up you did, and I like those preferably better because it's super simple lol. I've worked on quite a bit of those Emerson Condensers, never had the issues ya mentioned. Did ya replace the controller? I've seen them go finnecky before, great video as always dave

  6. Wdog84 Jc4L says:

    That was a great little video, love being able to take something from electrical to old school and have it running sweet. A young guy started with us and used the viper nylog on everything, been using that lately as a bit of re assurance lol

  7. phil955i says:

    Good call on your method of curing the intermittent fault, but I'm sorry to say mate that those bullet type (as you call them) pressure switches I find are quite unreliable, they don't seem to be able to handle constant operations in an LP pump down situation (I've never used a fan cycling one though, they may be better). They seem to last a year to 18 months tops. Although saying that maybe that's long enough until the next callout ;-)

  8. Billy Field says:

    Is sir Lawrence sandwiche prep table ($2300) comparable to true ?
    48 in prep table in true cost $4300,Traulsen is 5k,centerline by traulsen cost 3340.which one would you buy for your food truck

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