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Thread: Walk in Freezer

  1. #1
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    Walk in Freezer

    Hey guys I have a walk in freezer(404a) that is reading OIL LOCKOUTout, AMB SBCL LOCKOUT.
    I do have ice build up from the compressor to Evap coil. My pressure is 227.4/31.6 156.1

    Any suggestions on best way to troubleshoot this issue?

  2. #2
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    Quote Originally Posted by Ant100218 View Post
    Hey guys I have a walk in freezer(404a) that is reading OIL LOCKOUTout, AMB SBCL LOCKOUT.
    I do have ice build up from the compressor to Evap coil. My pressure is 227.4/31.6 156.1

    Any suggestions on best way to troubleshoot this issue?
    What temperatures go with those pressures?

    Whats the SH at the compressor?
    Whats the oil pressure at start up and 2, 5 and 10 mins later?

    Evaporator clear?
    Fan(s) turning right direction?

  3. #3
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    Indoor or outdoor condensing unit and what ambient ?

  4. #4
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  5. #5
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    Ice build-up from the compressor to the evap... it sounds like the unit is flooding back.

  6. #6
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    Oilfailure, probably due to compressor crank case full of liquid refrigerant due to flood back.

  7. #7
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    or liquid migration on off cycle.

  8. #8
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    Has someone bought an indoor condensing unit and put it outdoors ??

    That shit pisses me off so bad ...

  9. #9
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    Quote Originally Posted by ATX_Dan View Post
    Ice build-up from the compressor to the evap... it sounds like the unit is flooding back.
    Not in refrigeration! 30F SH at the pump with a -20 evaporator puts that line below freezing yet not flooding.

  10. #10
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    yup , and if the insulation is thin , and its humid out , the pipe will turn into a white baseball bat , and altho it looks bad , its normal

  11. #11
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    I love how people associate ice with flood back.

    It's a freezer, the refrigerant is like -10*F if not lower. WELL below freezing, any moisture would just freeze onto the pipe. All that ice means is that there's humidity in the air and the pipe is below freezing, that's it.

  12. #12
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    Quote Originally Posted by Olivero View Post
    I love how people associate ice with flood back.

    It's a freezer, the refrigerant is like -10*F if not lower. WELL below freezing, any moisture would just freeze onto the pipe. All that ice means is that there's humidity in the air and the pipe is below freezing, that's it.
    You typically can thaw out a little frost or ice at the suction ball valve by just putting your hand on it for a few seconds. If you hand freezes to it and starts to burn, its flooding. 8/10 times.

    Without pictures or a better description, and the oil failures, I bet its flooding out the compressor.

  13. #13
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    It's possible that it is, but a quick SH measurement would confirm it either way.

    I'm just saying ice on a comp or pipes on a freezer does not mean it's flooding.

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