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7300 X4 Carrier unit shotsdown

Discussion in 'Refrigerated Trucking Forum' started by Art08, Jul 25, 2018.

  1. Jul 25, 2018 #1
    Art08

    Art08 Bobtail Member

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    Nov 21, 2017
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    i am in Phoenix AZ. Outside temp 96F at night and -115F day time. Refer would start and then shots down giving next codes:
    А07008 check redundant RAT sensor
    A00013 high discharge pressure
    A03001 ... load calibration
    Do “clear codes”. It helps for a few min and then same story....
    Any advices apretiated!
     
    Art08, Jul 25, 2018
    Art08, Jul 25, 2018
    #1
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  3. Jul 25, 2018 #2
    Misesian

    Misesian Road Train Member

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    May 21, 2014
    Nothwest Arkansas
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    Since you have both RAT fault and high discharge, the problem is most likely with the evaporator. Either the sensor is bad and is not allowing to operate properly, the evaporator blower may be the issue, evaporator coil could be the issue. Have you tried manual defrosts? If you do, and a lot of water comes out, it’s just iced up due to operating conditions. If not much comes out, you need to get it looked at. Could be just a sensor failure causing it.
     
    Misesian, Jul 25, 2018
    Misesian, Jul 25, 2018
    #2
  4. Jul 25, 2018 #3
    STexan

    STexan Road Train Member

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    Are you loaded? What is set point?

    As mentioned do a switch off for a minute then back on, then a manual defrost.

    We’ve had a few newer units do similar when we see a rapid outside air temp rise over 4-6 hours. Turning off then back on fixed most of these issues, however they would not shut off, but just coded.
     
    STexan, Jul 25, 2018
    STexan, Jul 25, 2018
    #3
  6. Jul 25, 2018 #5
    Art08

    Art08 Bobtail Member

    23
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    Nov 21, 2017
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    I️ am empty. Have to pick up load in a few hours with -10 degree pre-cooled.

    I’ve tried to do manual defrost but it does not let me: “cannot start defrost cycle”.
     
    Art08, Jul 25, 2018
    Art08, Jul 25, 2018
    #5
  8. Jul 25, 2018 #5
    STexan

    STexan Road Train Member

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    Oct 3, 2011
    Longview, TX
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    Sounds like it has issues that’s going to require a tech look at it. There’s nothing obstructing the lower interior intake in the nose of the trailer is there? Like plastic or a crushed bulkhead?
     
    STexan, Jul 25, 2018
    STexan, Jul 25, 2018
    #5
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