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  1. #14
    Join Date
    Jan 2010
    Posts
    6,777
    [QUOTE=RyanHVAC;16044931] Pump nitrogen in low side, it will hold 110 psi for 2 hours, pump nitrogen in high side to 120psi and will quickly leak down to 80 psi.

    If you fill nitrogen on the low side it will go to the evaporator,compressor,out the discharge and onto condenser.
    If you fill nitrogen on the high side it will go to the condenser and STOP at the discharge. It will continue to bleed thru the cap tube and fill the evaporator. That is not a external leak but a leak thru the cap tube. Also most restrictions are where your frosting starts. I would do a compressor test.

  2. #15
    Join Date
    Jun 2013
    Location
    Atlanta, GA
    Posts
    41
    Hey guys, found the problem. Condenser is almost completely plugged up. Isolated it from the system and pumped nitrogen through it. Pushing the nitrogen in it its building pressure and just trickling out the other side. Cant clear it with the pressure so its off to the parts house tomorrow. Thanks for the help with this.

  3. #16
    Join Date
    Oct 2012
    Location
    Wisconsin
    Posts
    4,360
    Quote Originally Posted by RyanHVAC View Post
    Hey guys, found the problem. Condenser is almost completely plugged up. Isolated it from the system and pumped nitrogen through it. Pushing the nitrogen in it its building pressure and just trickling out the other side. Cant clear it with the pressure so its off to the parts house tomorrow. Thanks for the help with this.
    Good, glad to hear you got to the bottom of it. Thanks for the follow up I was curious to know if that's what it really was.

  4. #17
    Join Date
    Mar 2013
    Posts
    44
    As was I. Makes sense. Kudos for catching it. One of those rare condenser anomalies with oil and god knows what else.

  5. #18
    Join Date
    May 2007
    Location
    maryland, baltimore
    Posts
    135
    We do a lot of True mfg warranty work, in the past depending on the type of failure, we would change condensing unit and cap tube. By the time you flush the old unit and change the compressor there are little savings. As stated earlier when a compressor comes apart the debris is trapped in the condenser and there is no telling if all of it came out. A tech recently bought new gauges and had a hell of a time with pressures on a new unit install, core depressors were to deep in hose end.

  6. #19
    Join Date
    Jun 2013
    Location
    Atlanta, GA
    Posts
    41
    Got it up and running, what do you all think of these pressures/temps??Name:  20130626_210653.jpg
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