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  1. #1
    Join Date
    Nov 2011
    Posts
    53

    Heat Pump Outdoor Fan Cycling (Not defrost)

    I have an AUX mini-split heat pump. The outdoor fan seems to cycle on and off when in heating mode. Any idea what this is about? BTW, I'm not talking about defrost and it seems to heat perfectly fine.

    AUX KFR-32W, 12,966 BTU/hr (heating), R-22, installed in 2003.

    For the full specs sticker, see the pic.
    Attached Images Attached Images  

  2. #2
    Join Date
    Apr 2007
    Location
    Saint Augustine, Florida, United States
    Posts
    1,168
    Jeez, what's the matter? You can't read that?

    I would GUESS it is some weird controls deal. Good luck.

  3. #3
    Join Date
    Nov 2011
    Posts
    53
    Quote Originally Posted by JWB View Post
    Jeez, what's the matter? You can't read that?

    I would GUESS it is some weird controls deal. Good luck.
    Thanks - but nothing is broken (I don't think...). Just curious.

  4. #4
    Join Date
    Apr 2001
    Location
    Over Here
    Posts
    1,105
    I am not familiar with their design, or that particular unit, but for heat pumps, some manufacturers regulate high pressure by cycling the OD fan in heat mode.

    If this is not normal to you for this unit, and that is the case, check the filter or indoor coil. It or they may not be moving adequate air causing higher than acceptable discharge pressure. Another cause of this would be operating heat when outside ambient air temp is 'warm', but inside conditions require heating.

  5. #5
    Join Date
    Nov 2011
    Posts
    53
    Quote Originally Posted by thermojohn View Post
    I am not familiar with their design, or that unit, but for heat pumps, some manufacturers regulate high pressure by cycling the OD fan in heat mode.

    If this is not normal to you for this unit, and that is the case, check the filter or indoor coil. It or they may not be moving adequate air causing higher than acceptable discharge pressure. Another cause of this would be operating heat when outside ambient air temp is 'warm', but inside conditions require heating.
    I moved in during the summer, so I have no idea about what the "normal" is for this unit in heating mode. But like I said, it seems to heat fine.

    I cleaned the indoor coil with foaming coil cleaner/disinfectant (less than 2 months ago) and clean the washable filters regularly.

    Right now it is just above freezing at 3c outside and indoor temp set at 24.

  6. #6
    Join Date
    Apr 2001
    Location
    Over Here
    Posts
    1,105
    Quote Originally Posted by Jim1977 View Post
    I moved in during the summer, so I have no idea about what the "normal" is for this unit in heating mode. But like I said, it seems to heat fine.

    I cleaned the indoor coil with foaming coil cleaner/disinfectant (less than 2 months ago) and clean the washable filters regularly.

    Right now it is just above freezing at 3c outside and indoor temp set at 24.
    I thought I could barely make out 50hz on that data plate. Maybe you can find a manual online that would explain the operation in layman's terms what is going on. If it's heating fine, I would suspect the cycling fan is what I originally posted. If it ices over, and does not defrost, then you have a defrost issue.

    Your indoor coil may be impacted inside. Coil cleanings can be misleading if you can't pull and clean it.

  7. #7
    Join Date
    Nov 2011
    Posts
    53
    Sorry, but this site really limits the size of pictures...

    Here is the nameplate again but larger and a pic of the coils.
    Attached Images Attached Images   

  8. #8
    Join Date
    Dec 2007
    Posts
    4,760
    you have a ductless/mini-slipt system.

    this unit converts a/c to d/c and DOES cycle the fan and/or compressor.

    I would also guess that it was not from a local dealer, probably online order or "seconds" by looking at that label!!
    The Food Stamp Program, administered by the U.S. Department of Agriculture, is proud to be distributing the greatest amount of free meals and stamps EVER.
    Meanwhile, the National Park Service, administered by the U.S. Department of the Interior, asks us to "Please Do Not Feed the Animals". Their stated reason for this policy "... the animals become dependent on handouts and will not learn to take care of themselves."
    from an excerpt by Paul Jacob in Sun City, AZ

  9. #9
    Join Date
    Nov 2011
    Posts
    53
    It's local to me -- I'm in China.

  10. #10
    Join Date
    Feb 2009
    Location
    Tallahassee, FL
    Posts
    6,051
    And most of us are in N America! We cant read Chinese!

    Although we may have to one day. :/

  11. #11
    Join Date
    Nov 2011
    Posts
    53
    Quote Originally Posted by SBKold View Post
    And most of us are in N America! We cant read Chinese!

    Although we may have to one day. :/
    You don't have to know Chinese to understand (most) of the specs

    Model: KFR-32W
    Indoor units: 1
    Voltage/Frequency: 220V / 50 Hz
    Capacity (Cooling/Heating): 3.20 kW / 3.80 kW
    Draw (Cooling/Heating): 6.0A / 6.2A
    Consumption: 1.28kW / 1.32 kW
    Pressures (min/max): 0.8MPa / 2.8MPa
    Refrigerant: R-22
    Charge: 0.85 kg
    Air Volume: 520m^3/h
    Noise (Indoor/Outdoor): <41 / 51 dB
    Weight (Indoor/Outdoor): 10.5 kg / 38 kg
    Manufactured: 2003.08.31 (Ningbo, China)

  12. #12
    Join Date
    Jan 2004
    Location
    PA
    Posts
    68,753
    Need a local tech to check it. Thats not a unit that most of us would know how its configured to work.
    Contractor locator map

    How-to-apply-for-Professional

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

  13. #13
    Join Date
    Nov 2011
    Posts
    53
    I'm not sure it would be worth the money to have it checked out. I am thinking of just replacing it with a Hitachi RAS/C-36 before it gets too cold.

    Links to diect purchase sites are not permitted
    Capacity (Cooling/Heating): 3.60 kW / 4.20 kW
    Consumption: 1.07kW / 1.20 kW
    Air Volume: 600m^3/h
    Noise (Indoor/Outdoor): 27-39 / 50 dB
    Last edited by beenthere; 12-10-2011 at 09:10 AM. Reason: Removed link

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