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  1. #1
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    craft 2 ton heating mode problem



    hi
    i have 2 ton craft split unit
    it had leak so i repair it
    when i charged the system
    it work peftectly in cooling mode
    11 a current
    40 psi suction line pressure
    but when i change it to heating mode
    the discharge pressure increases gradually
    starting from
    8 ampere
    100 psi
    reaching 475 psi
    and current reach 25 a
    so compressor start opening relief valve
    so pressure decrease to 350 psi then increase to 475 psi
    so what is the problem
    i checked both capillary tube and filter in outdoor unit they are working very good
    voltage is 220 v



  2. #2
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    Re: craft 2 ton heating mode problem

    Replace your filter drier

  3. #3
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    Re: craft 2 ton heating mode problem

    reversing valve not changing over fully or check valve not opening?

  4. #4
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    Re: craft 2 ton heating mode problem

    how i can check if the problem is from reversing valve or not

  5. #5
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    Re: craft 2 ton heating mode problem

    can it be blockage in the indoor unit

  6. #6
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    Re: craft 2 ton heating mode problem

    http://www.achrnews.com/articles/don...e-outsmart-you
    copied from a website- saves me waffling on!!

  7. #7
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    Re: craft 2 ton heating mode problem

    ok
    man i think the reversing valve working
    because i install it
    then i tested it
    before chraging the system

  8. #8
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    Re: craft 2 ton heating mode problem

    how did u test it after installation? and did you use a wet rag to keep the body cool?
    Quote Originally Posted by kefah View Post
    ok
    man i think the reversing valve working
    because i install it
    then i tested it
    before chraging the system

  9. #9
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    Re: craft 2 ton heating mode problem

    yes
    i cool it using wet rig and water
    then when i connect and disconnect the RV
    its work perfectly
    so can it be blockage or that impossible

  10. #10
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    Re: craft 2 ton heating mode problem

    easiest way to proove what part is knackered is to degas it, fit gauge points on each pipe between components- the reversing valve may be moving- but not seating correctly!!

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    Re: craft 2 ton heating mode problem

    can you explain more
    now the system not contain *****
    ok
    i will fit the gauge to both suction line and discharge line connection
    ok
    then what

  12. #12
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    Re: craft 2 ton heating mode problem

    So, out of interest,

    What system is this?
    What refrigerant is it operating on?
    When you repaired it, how deep were your vacuum? Standing?



    .

  13. #13
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    Re: craft 2 ton heating mode problem

    if youve degassed it then cut out the check valves and check you get flow through them- make sure u can braze em back in- also check for strainer gauzes before capillarys they can be clogged- again cut them out to inspect them- or blow through each component to proove flow

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    Re: craft 2 ton heating mode problem

    Quote Originally Posted by The Viking View Post
    So, out of interest,

    What system is this?
    What refrigerant is it operating on?
    When you repaired it, how deep were your vacuum? Standing?



    .
    ok
    the system is split unit 24000 btu heating cooling
    i repaired leaks and installed reversing valve
    refrigerant is r 22

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    Re: craft 2 ton heating mode problem

    Quote Originally Posted by install monkey View Post
    if youve degassed it then cut out the check valves and check you get flow through them- make sure u can braze em back in- also check for strainer gauzes before capillarys they can be clogged- again cut them out to inspect them- or blow through each component to proove flow
    ok
    i checked the strainer and its ok

  16. #16
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    Re: craft 2 ton heating mode problem

    where was the leak originally?- was it on the reversing valve hence the replacement

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    Re: craft 2 ton heating mode problem

    it was in the indoor unit
    the installed reversing valve is new

  18. #18
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    Re: craft 2 ton heating mode problem

    so you repaired the leak on the indoor , was the reversing valve jammed???- wondering why you replaced it? did you fit a new drier- heatpump drier?
    Quote Originally Posted by kefah View Post
    it was in the indoor unit
    the installed reversing valve is new

  19. #19
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    Re: craft 2 ton heating mode problem

    no the ex reversing valve was jammed
    so it been removed
    so i installled new one
    after the problem happened i checked the filter drier
    i didn't find it
    it looks like been removed when the ex reversing valved jammed and both removed
    so i received the spli without RV
    filter drier
    i installed the RV
    without installing new filter drier

    so the problem happened
    cooling mode working very good
    heating mode cause the compressor overheated

  20. #20
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    Re: craft 2 ton heating mode problem

    was the indoor fan running in heating mode? - discharge pressure increased slowly-did the indoor coil get warm prior to reaching 475 psi? there should be 2 strainers/check valves - have u checked the indoor check valve?? trying to find info on craft units- can only find weather craft-

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    Re: craft 2 ton heating mode problem

    was the indoor fan running in heating mode?
    yes
    discharge pressure increased slowly ?
    yes
    did the indoor coil get warm prior to reaching 475 psi?
    yes
    the indoor get too warm
    but the return pipe from it was too little hot
    have u checked the indoor check valve
    no

  22. #22
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    Re: craft 2 ton heating mode problem

    whats the model number

  23. #23
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    Re: craft 2 ton heating mode problem

    i dont know
    but you will not find it
    its made only in middle east

  24. #24
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    Re: craft 2 ton heating mode problem

    http://www.crafft.co.uk/information.asp?show=5&id=2

    Quote Originally Posted by kefah View Post
    i dont know
    but you will not find it
    its made only in middle east

  25. #25
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    Re: craft 2 ton heating mode problem


  26. #26
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    Re: craft 2 ton heating mode problem

    Quote Originally Posted by install monkey View Post
    was the indoor fan running in heating mode? - discharge pressure increased slowly-did the indoor coil get warm prior to reaching 475 psi? there should be 2 strainers/check valves - have u checked the indoor check valve?? trying to find info on craft units- can only find weather craft-
    was the indoor fan running in heating mode?
    yes
    discharge pressure increased slowly ?
    yes
    did the indoor coil get warm prior to reaching 475 psi?
    yes
    the indoor get too warm
    but the return pipe from it was too little hot
    have u checked the indoor check valve
    no

  27. #27
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    Re: craft 2 ton heating mode problem

    thanks to every body
    today i took the indoor unit then connect it to an other outdoor unit
    so it worked both in heating and cooling mode
    so the problem no in the outdoor unit
    then you suggest me to check the reversing valve
    filter drier
    Quote Originally Posted by install monkey View Post
    if youve degassed it then cut out the check valves and check you get flow through them- make sure u can braze em back in- also check for strainer gauzes before capillarys they can be clogged- again cut them out to inspect them- or blow through each component to proove flow
    can you explain more what you mean by check valves
    and strainer gauze

  28. #28
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    Re: craft 2 ton heating mode problem

    Check valve
    A valve that closes to prevent backward flow of liquid

    Strainer Gauze
    "Filter"

  29. #29
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    Re: craft 2 ton heating mode problem

    RV fault???

  30. #30
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    Re: craft 2 ton heating mode problem


  31. #31
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    Re: craft 2 ton heating mode problem

    Check valve
    A valve that closes to prevent backward flow of liquid
    Strainer Gauze
    "Filter"
    thank u for info
    RV fault???
    may be
    Quote Originally Posted by jdunc2301 View Post
    i dont know
    i searched for the filter i didnt find it
    it been removed before by another tech
    and i checked the capillary tube
    both flow was very good
    reversing valve my fault
    so before removing it
    what you advise me to do

  32. #32
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    Re: craft 2 ton heating mode problem

    I'm still thinking non condensables...



    .

  33. #33
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    Re: craft 2 ton heating mode problem

    Quote Originally Posted by The Viking View Post
    I'm still thinking non condensables...



    .
    what you mean

  34. #34
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    Re: craft 2 ton heating mode problem

    today i opened the outdoor unit
    and removed the rv
    i brokeit so i discovered that its jammed
    so i will install another rv
    i installed filter dryer in the outdoor unit
    any suggestion
    Last edited by kefah; 26-02-2013 at 10:25 PM.

  35. #35
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    Re: craft 2 ton heating mode problem

    please help

  36. #36
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    Re: craft 2 ton heating mode problem

    so did you replace the RV and drier, and did you keep the RV cool during brazing..as per your other post?

  37. #37
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    Re: craft 2 ton heating mode problem

    Quote Originally Posted by jdunc2301 View Post
    so did you replace the RV and drier, and did you keep the RV cool during brazing..as per your other post?
    i installed filter drier
    tomorrow i will install the RV
    i will try to cool it

  38. #38
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    Re: craft 2 ton heating mode problem

    so any advices

  39. #39
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    Re: craft 2 ton heating mode problem

    Well, as per your other post on keeping a RV cool during brazing
    As it's unlikely you have any cooling gel i would;
    Fit the RV on to the pipework without braze.
    Wrap the RV body with wet rag/cloth/paper towel
    Using the correct method, braze one joint.
    Wet the rag/cloth/paper towel again....and repeat until all joints are brazed to satisfaction

    I have to add, this should have been covered during your training experience....

  40. #40
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    Re: craft 2 ton heating mode problem

    Quote Originally Posted by jdunc2301 View Post
    Well, as per your other post on keeping a RV cool during brazing
    As it's unlikely you have any cooling gel i would;
    Fit the RV on to the pipework without braze.
    Wrap the RV body with wet rag/cloth/paper towel
    Using the correct method, braze one joint.
    Wet the rag/cloth/paper towel again....and repeat until all joints are brazed to satisfaction

    I have to add, this should have been covered during your training experience....
    thank you man
    i appreciate that from you
    i installed the RV today
    how i can check if it works properly before charging the system

  41. #41
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    Re: craft 2 ton heating mode problem

    realistically u cant- energisin the coil wont prove that the seals are ok- only vac and gas and run it

  42. #42
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    Re: craft 2 ton heating mode problem

    Quote Originally Posted by install monkey View Post
    only vac and gas and run it
    what you mean by gas it
    you mean charge it

  43. #43
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    Re: craft 2 ton heating mode problem

    Quote Originally Posted by kefah View Post
    what you mean by gas it
    you mean charge it
    Charge it with refrigerant, but i would say it needs a damn good pressure/leak test first, once happy with that it will need a good vac. As your having problems make sure your certain you've achieved a good enough vac. Then charge to rating plate, and test run in all modes, take temps pressures etc and evaluate how well it's working...or not

  44. #44
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    Re: craft 2 ton heating mode problem

    thank you man
    today i installed the split unit
    and i vacuumed it
    then charged it
    it work perfectly in cooling mode
    with current 12 ampere
    and suction pressure between 55 and 60 psi
    but when in heating mode
    the heating is perfect
    but the current is start with 13 ampere
    and pressure increase when it reach 300 then heating effect start
    and pressure rise to 430 psi with current 17-18-19 ampere
    so the outdoor fan turn off then current be 14 ampere
    and compressor keep working and pressure fall hesitatinglyto 300 so the out fan start working
    and rise again to 17 18 19 ampere
    heating is very good
    i checked the filter drier and capillary tube and indoor unit for any blockage and they are clean

  45. #45
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    Re: craft 2 ton heating mode problem

    Quote Originally Posted by kefah View Post
    thank you man
    today i installed the split unit
    and i vacuumed it
    then charged it
    it work perfectly in cooling mode
    with current 12 ampere
    and suction pressure between 55 and 60 psi
    but when in heating mode
    the heating is perfect
    but the current is start with 13 ampere
    and pressure increase when it reach 300 then heating effect start
    and pressure rise to 430 psi with current 17-18-19 ampere
    so the outdoor fan turn off then current be 14 ampere
    and compressor keep working and pressure fall hesitatinglyto 300 so the out fan start working
    and rise again to 17 18 19 ampere
    heating is very good
    i checked the filter drier and capillary tube and indoor unit for any blockage and they are clean
    do you mean the outdoor fan comes on at 430psi and off at 300??
    are you happy with it now?

  46. #46
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    Re: craft 2 ton heating mode problem

    no
    outdoor fan works perfectly
    but when
    the pressure reach 430 psi its turn off
    so the pressure decrease gradually
    then when it reach 300 psi its work again
    Last edited by kefah; 04-03-2013 at 07:59 PM.

  47. #47
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    Re: craft 2 ton heating mode problem

    up
    up
    up
    up

  48. #48
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    Re: craft 2 ton heating mode problem

    the system now works perfectly
    thanks all
    please close the thread

  49. #49
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    Re: craft 2 ton heating mode problem

    the thread closes after 6 month of no more replies

  50. #50
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    Re: craft 2 ton heating mode problem

    Quote Originally Posted by install monkey View Post
    the thread closes after 6 month of no more replies
    thank you for the info

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