Results 1 to 9 of 9
  1. #1
    Join Date
    Jun 2011
    Posts
    26

    Compressor makes loud bang sound

    I am dealing with a Bryant 3 ton 410a split system ac. Customer reported the AC making a loud banging noise on start up. I put my gauges on and started the unit. In the off position the gauges read 175 psi. On start up the suction drops to about 130 and the head runs up to about 275. Then after about 45 seconds the head shoots to 600 the unit makes a loud sound. Then the sound of the compressor changes and it returns to equalization but the compressor is running.
    Whats causing this I realize the compressor is not pumping after the loud sound.

  2. #2
    Join Date
    Dec 2002
    Location
    Houston,Tx.
    Posts
    15,960
    Quote Originally Posted by bigwave View Post
    On start up the suction drops to about 130 and the head runs up to about 275. Then after about 45 seconds the head shoots to 600 the unit makes a loud sound..
    Must have a dirty coil, or slow condenser motor, or overcharge, I am about the only Pro here that could even imagine it being a restriction.
    __________________________________________________ _______________________
    “Experience is a hard teacher because she gives the test first, the lesson afterwards". - Vernon Law

    "Never let success go to your head, and never let failure go to your heart". - Unknown

  3. #3
    Join Date
    Jul 2006
    Location
    Virginia
    Posts
    4,628
    As per the AOP Rules only Professional Members * can reply with
    advice
    to the OP. Anyone may post and ask questions. They may even
    question the * member answer but not give advice or expand on the
    advice given. Please read these rules for a complete understanding. AOP Rules
    For those in our industry who wish to become a Professional Member, please click here and follow the
    instructions. Apply for Professional
    Membership
    Last edited by beenthere; 08-25-2011 at 05:44 AM. Reason: No *

  4. #4
    Join Date
    Jun 2011
    Posts
    26
    I thought it may be a restriction. In order for it to shoot up that fast wouldn't it have to be a complete restriction and the suction pressure drop? Why does it run without pumping.

  5. #5
    Join Date
    Sep 2002
    Location
    I don't know
    Posts
    2,903
    As per the AOP Rules only Professional Members * can reply with
    advice
    to the OP. Anyone may post and ask questions. They may even
    question the * member answer but not give advice or expand on the
    advice given. Please read these rules for a complete understanding. AOP Rules
    For those in our industry who wish to become a Professional Member, please click here and follow the
    instructions. Apply for Professional
    Membership
    Last edited by beenthere; 08-25-2011 at 05:44 AM. Reason: No *
    General public's attitude towards our energy predicament: "I reject the reality of finite resource depletion and substitute it with my own; energy is infinite, we just need an alternative storage medium to run the cars on. The economy can grow indefinitely - we just need to "green" everything! Technology is energy! Peak what?"

  6. #6
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    67,913
    Quote Originally Posted by Mr Bill View Post
    Must have a dirty coil, or slow condenser motor, or overcharge, I am about the only Pro here that could even imagine it being a restriction.

    It could be a restriction, plus 4 pounds of excess charge.
    Contractor locator map

    How-to-apply-for-Professional

    How many times must one fix something before it is fixed?

  7. #7
    Join Date
    Jul 2002
    Location
    Yuma, AZ
    Posts
    2,361
    Quote Originally Posted by bigwave View Post
    I thought it may be a restriction. In order for it to shoot up that fast wouldn't it have to be a complete restriction and the suction pressure drop? Why does it run without pumping.
    Internal pressure relief (popoff) valve is built into the compressor. This saves the compressor from abusive conditions. Find the abuse and fix it.
    "I have never let my schooling interfere with my education."
    Mark Twain
    More at: http://www.quotationspage.com/subjects/education/

  8. #8
    Join Date
    Aug 2011
    Location
    McKinney, Texas
    Posts
    10
    We had the same problem a couple weeks back on a service call with a 5 ton Goodman.



    As per the AOP Rules only Professional Members * can reply with
    advice
    to the OP. Anyone may post and ask questions. They may even
    question the * member answer but not give advice or expand on the
    advice given. Please read these rules for a complete understanding. AOP Rules
    For those in our industry who wish to become a Professional Member, please click here and follow the
    instructions. Apply for Professional
    Membership
    Last edited by beenthere; 08-25-2011 at 04:44 PM. Reason: No *

  9. #9
    Join Date
    May 2008
    Location
    Missouri
    Posts
    3,504
    Bigwave, if you're actually repairing someone's AC, then you need to get the pro status and you can go into technical stuff!

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