problem with an Carrier ultra fresh 2

Discussion in 'Refrigerated Trucking Forum' started by GMCHALE520, Jul 26, 2013.

  1. Jul 26, 2013 #1
    GMCHALE520

    GMCHALE520 Bobtail Member

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    Have a 1999 Carrier ultra fresh 2. The unit shut off after a few mins the display screen says high pressure. Last time the mechanic said it was low on refrigerant. just wondering if that sounds correct. These guys charge a fortune just want make shore I am not getting taken for ride.
     
    GMCHALE520, Jul 26, 2013
    GMCHALE520, Jul 26, 2013
    #1
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  3. Jul 26, 2013 #2
    baha

    baha Road Train Member

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    buy a set of a/c gauges then ck press with unit runing
     
    baha, Jul 26, 2013
    baha, Jul 26, 2013
    #2
  4. Jul 27, 2013 #3
    chalupa

    chalupa Road Train Member

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    That's a no from the refrigeration stand point. System is obviously protected by a HP switch as most are......

    Some reasons for high pressure drop out in refrigeration......

    Too much freon,
    Bad / plugged condenser
    Bad / plugged drier / accumulator
    Too much oil
    Bad switch / sensor

    Need guages to tell wassup.

    If it were low on freon then coil temp would be too low and thermostat would cut out comp to allow coil to thaw. You didn't say...is it simply cutting off or is it switching to defrost?

    JMO
     
    chalupa, Jul 27, 2013
    chalupa, Jul 27, 2013
    #3
  5. Jul 27, 2013 #4
    GMCHALE520

    GMCHALE520 Bobtail Member

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    The unit just shutting of completely. I figure that something had to be funny with it coming up high pressure.
     
    GMCHALE520, Jul 27, 2013
    GMCHALE520, Jul 27, 2013
    #4
  7. Jul 27, 2013 #5
    RedForeman

    RedForeman Momentum Conservationist

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    My '05 Ultra XTC was doing that about 2 months ago. It was a broken condenser fan shroud along with an overdue condenser washout. Get up on a ladder and check for condenser airflow issues for free before you do anything else.

    If you post your location, someone might have a referral to a better shop if it comes to that.
     
    RedForeman, Jul 27, 2013
    RedForeman, Jul 27, 2013
    #5
    pusherman Thanks this.
  8. Jul 27, 2013 #6
    chalupa

    chalupa Road Train Member

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    There you go...what Red said....a plugged condenser ( no air flow ) would net the same results of high pressure drop out.

    Let us know what you find.......
     
    chalupa, Jul 27, 2013
    chalupa, Jul 27, 2013
    #6
  9. Jul 27, 2013 #7
    donkeyshow72

    donkeyshow72 Light Load Member

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    or loose belt
     
    donkeyshow72, Jul 27, 2013
    donkeyshow72, Jul 27, 2013
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    Buckeyes614 Thanks this.
  10. Jul 30, 2013 #8
    GMCHALE520

    GMCHALE520 Bobtail Member

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    Had to bring it to the shop. They found a leak under Suction Service Valve. also the brucket the hold the low pressure line was worn out. unfortunately they charged me a fortune to charge the system. going to order some gauges so I can fix it my self next time. ON a side note my other reefer trailer started shutting off wound up being a the fan belt not as hard to change as these mechanics make it out to be.
     
    GMCHALE520, Jul 30, 2013
    GMCHALE520, Jul 30, 2013
    #8
    RedForeman Thanks this.
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