Page 3 of 3 FirstFirst 123
Results 27 to 38 of 38

Thread: a problem unit

  1. #27
    Join Date
    Jul 2012
    Location
    sanger texas
    Posts
    21
    havent been on here in a week or so i was on-call and busy busy. So this customer got back into town,today i replaced the txv, the drier, charged all new refrigerant. the system symptoms are the same and didnt change anything, the compressor still over amping and pressuers the same... not good.

  2. #28
    Join Date
    Dec 2003
    Location
    Citrus County, Florida
    Posts
    1,576
    Did you remove the panels on the condenser and see that the coil is clear????? try misting the condenser with a water hose. Does the pressures fall into place? Has the fan/motor been changed? On most Tranes, the fan blade hub is flush with the end of the motoer shaft. Check the heat rise of the condenser. It should not be more than 10 or 12*, This realy sounds like a restricted condenser coil. Been there....done that.
    Doug

  3. #29
    Join Date
    Sep 2002
    Posts
    510

    Liquid line drier

    Are you sure that you don't have two liquid line driers on this unit? One is factory installed on the inside of the panel and if you aren't looking for it can be easily missed.

  4. #30
    Join Date
    Aug 2004
    Location
    North Richland Hills, Texas
    Posts
    14,915
    Have you checked the air temperature entering the condenser on all 4 sides?

    Are there any obstructions that could cause the unit to recirculate its discharge air?
    Unit installed in a corner?

    One of the reasons we switched from Trane to American Standard was to get away from that god awful top. It is great for keeping leaves out of the unit, but terrible for efficiency if the unit is not out in a wide open area.
    If more government is the answer, then it's a really stupid question.

  5. #31
    Join Date
    Aug 2012
    Location
    Hot Springs, Arkansas, United States
    Posts
    55
    This may sound a bit unorthodox but have you tried a light water mist on the condenser to see if if that helps bring your readings more in-line. May help eliminate what it's not and help find what it is.

  6. #32
    Join Date
    Aug 2012
    Location
    Hot Springs, Arkansas, United States
    Posts
    55
    Sorry Gunslinger. I re-posted the water mist thing. I missed it when I read through the first time.

  7. #33
    Join Date
    Jul 2009
    Location
    Columbia, MD
    Posts
    4,036
    sounds like a fun service call. did you cut out the factory drier and install one on the outside of the unit? you may have a restricted outdoor coil. i would try blowing it out with nitrogen. make sure there are no resitrctions in the piping at the outdoor unit. make sure discharge line of compressor isnt kinked.

  8. #34
    Join Date
    Feb 2006
    Location
    Phoenix,AZ
    Posts
    2,891
    Quote Originally Posted by mark beiser View Post
    Have you checked the air temperature entering the condenser on all 4 sides?

    Are there any obstructions that could cause the unit to recirculate its discharge air?
    Unit installed in a corner?

    One of the reasons we switched from Trane to American Standard was to get away from that god awful top. It is great for keeping leaves out of the unit, but terrible for efficiency if the unit is not out in a wide open area.
    Yeah, i had a few of those too!! What a terrible design. I guess they were going for looks!!! Very easy to pop the top and watch the head pressure fall!

  9. #35
    Join Date
    Jul 2012
    Location
    sanger texas
    Posts
    21
    I removed both driers in the heat pump and put in a biflow drier, I've washed the coil several times, no restriction in airflow around heat pump, fan motor is good its pulling out air, amp draw normal blades balanced. And unfortunatly tranes tech support is few and far between. My supervisor is coming out with me tommorow. This one has just stumped me for sure, we'll see if we can come up with the culprit

  10. #36
    Join Date
    Jul 2012
    Location
    sanger texas
    Posts
    21
    Both *factory driers*

  11. #37
    Join Date
    Jul 2012
    Location
    sanger texas
    Posts
    21
    Remember It only acts up during the afternoon, in the morning and eairly afternoon pressures amp draws and sc/sh is normal, so the airflow restriction would make sense but I'm just not seeing it

  12. #38
    Join Date
    Aug 2004
    Location
    North Richland Hills, Texas
    Posts
    14,915
    Check the air temperature entering the outdoor coil, all 4 sides, make sure you are not getting recirculation of air at the outdoor unit.
    If more government is the answer, then it's a really stupid question.

Page 3 of 3 FirstFirst 123

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Comfortech Show Promo Image

Related Forums

Plumbing Talks | Contractor Magazine
Forums | Electrical Construction & Maintenance (EC&M) Magazine
Comfortech365 Virtual Event