Avoid Sanyo's ductless multi-split heat pumps
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  1. #1
    Join Date
    Aug 2007
    Posts
    9

    Avoid Sanyo's ductless multi-split heat pumps

    These ductless multiple-head systems have some really nasty usability and noise issues - don't believe the functionality advertised in Sanyo's literature or their smooth talking salespeople! I've heard their single mini-splits may work ok, but be warned - their multi (aka "Flexi-Multi") heatpump is hell for residential use. The Sanyo heat-cool mode switching controller logic is full of bugs that will drive the users crazy, and the auto mode sensing doesn't work at all. If that wasn't bad enough, any air handlers whose fans are not running while refrigerant is flowing to other active heads emit loud whistling or hissing pipe noises.
    We are wondering if other multisplit vendors like Fujitsu have similar problems, does anybody know. We were fooled into buying these Sanyos and now we're stuck with them. Hope this may help save others some grief.

  2. #2
    Join Date
    Nov 2000
    Location
    Eastern PA
    Posts
    68,923
    As a professional who has installed many different brands of mini-split systems, I can say I've never had the issues that are being stated here.

    Was this system installed by a professional HVAC contractor?
    Government is a disease...
    ...masquerading as its own cure…
    Ecclesiastes 10:2 NIV


  3. #3
    Join Date
    Mar 2005
    Location
    Suppy NC
    Posts
    4,513
    Quote Originally Posted by RoBoTeq View Post
    As a professional who has installed many different brands of mini-split systems, I can say I've never had the issues that are being stated here.

    Was this system installed by a professional HVAC contractor?

    i have to ask the same question
    have put in a lot of ductless units and multy zone with out any issues at all

    is your unit installed properly

  4. #4
    Join Date
    Apr 2004
    Posts
    420
    Did a Sanyo 12 K heat pump today, worked like a charm.

  5. #5
    Join Date
    Jan 2008
    Location
    Ottawa, Canada
    Posts
    166
    Same here, serviced and maintained many ductless sanyo's, both straight a/c and heat pump, always been very quiet never any major problems

  6. #6
    Join Date
    Jun 2001
    Location
    Louisville, KY
    Posts
    12,114
    If the OP can't post some answers, I'm going to delete this thread.

    Sounds like a hack job that the OP wants to blame on the OEM.
    Perhaps you should have read the instructions before calling.

  7. #7
    Join Date
    Apr 2004
    Posts
    420
    Quote Originally Posted by herbl View Post
    If that wasn't bad enough, any air handlers whose fans are not running while refrigerant is flowing to other active heads emit loud whistling or hissing pipe noises.
    I can tell you from a standpoint of multiple Sanyo installations that this is absolutely incorrect

  8. #8
    Join Date
    Aug 2002
    Location
    Southold.calm
    Posts
    5,376
    I give my vote to once again to blame the manufacture for a Bad Install

    Hay Herb Questions
    Did you buy these on line?
    Did your brother in law / neighbor / wife help you install these?
    Were the instillation instructions followed?
    Were they installed by a Professional?

    You get what you pay for.

  9. #9
    Join Date
    Mar 2005
    Location
    Suppy NC
    Posts
    4,513
    161 views of a unfounded accusation and a problem IMHO that really doesn't exist
    should be deleted

  10. #10
    Join Date
    Jul 2002
    Location
    Zelienople, Pa
    Posts
    2,965
    ...and he admits to getting a hack job...

    http://www.hvac-talk.com/vbb/showthr...=151503&page=2
    How tall are you Private???!!!!

  11. #11
    Join Date
    Aug 2007
    Posts
    9
    Quote Originally Posted by jrbenny View Post
    If the OP can't post some answers, I'm going to delete this thread.

    Sounds like a hack job that the OP wants to blame on the OEM.

    Thanks for all the replies. Was not trying to make anybody mad - unfortunately these were & are still real problems for us. FYI yes we did use a professional licensed installer, and no we did not buy the units online. I can't say for sure if we got a good quality install, or that we didn't get a 'hack job' - I could see how possibly that could contribute to the noise issue. However I can't see how the operational problem could arise from a bad install - ie. the Auto Mode bugs in the multi-headed configuration. To the folks who have said the Sanyo's work ok in the multi configuration -- have you actually seen the Auto Mode function switching properly between heat and cool, in the "Auto" setting, or, do you rely on the users changing manually between the dedicated heat and cool modes?

  12. #12
    Join Date
    Jun 2005
    Location
    South Jersey
    Posts
    1,461
    Have installed and serviced hundreds of Sanyos.............they are probably the best mini split out there and I've hever seen these problems in a properly installed unit.

  13. #13
    Join Date
    Oct 2007
    Location
    Maine
    Posts
    6

    Cool No problems here

    I have installed at least 100+ units to this day I have never had a problem with any of them. I installed the first one about 20 years ago and guess what, it is still working well in a small store. I would believe that it is an installation issue, check your power to make sure you do not have unstable feeds. I have had an issue not with Sanyo, but with another brand where we had voltage bouncing 202v to 218v, which caused issues with the control system



    Learning should be a daily practice.

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