Air Conditioner

Discussion in 'General Discussion' started by Sno Dough, Jul 21, 2019.

  1. Sno Dough

    Sno Dough New Member

    Jun 12, 2017
    2009 280 Sundancer
    Twin V6
    I have a 280 dancer and just started having an issue with the AC its been shutting down and saying low AC. I thought it was low on freon but its blowing cold as can be when it works. I also noticed it seems to be doing this only during the day when at marina never tried with generator. So now I am stumped. any help greatly appreciated

  2. Phasma

    Phasma Phasma2128 GOLD Sponsor

    Sep 17, 2016
    West Michigan
    2003 360 Sundancer
    Mercruiser 8.1s Horizon
    Possibly freezing up? Not trying to be a wise-guy. Maybe try raising the temp a few degrees
  3. bahamabreisus

    bahamabreisus Well-Known Member

    Oct 25, 2007
    Hampstead NC
    500 dancer, previous 420,390,300 dancers
    detriot 8v92
    Low AC can also be not enough power coming from shore power.
  4. Chris-380

    Chris-380 Well-Known Member

    Jan 20, 2019
    Pontoon Beach IL
    380 Sundancer 2000
    454 Horizon w/V drives
    Low ac means the AC voltage coming in is low for at least 3 minutes
    Jaybeaux and techmitch like this.
  5. Skuza

    Skuza Well-Known Member

    Nov 1, 2006
    Lake St Clair, MI
    400 Sundancer
    7.4L Horizons
    Must be going around. I also had that happen yesterday. I too believe it’s low on power. Think of it. The country is in a massive heatwave right now and every person at the marina with AC has it on-full blast. This is loading down the shore power at the marinas. When I shut down everything but the AC it seemed to help and not kick off.
    Jonathan Lawson likes this.
  6. mquiet

    mquiet Well-Known Member

    Aug 4, 2009
    North carolina
    1999 480 Sedan Bridge
    Caterpillar 3196
    As stated above, low AC is a voltage issue and it is going under the amount n Dee to power the unit. Low Pressure is due to the coils being dirty. Hi pressure is usually do to lack of cooling water flow. I would get a current meter on it and check voltage to the unit.
  7. electricaldoctor

    electricaldoctor Well-Known Member TECHNICAL Contributor PLATINUM Sponsor

    May 14, 2008
    Thousand Islands, Rockport, Ontario.
    1988 390 EC
    454 Mercruiser Gassers
    Don't forget to clean your return air screens.
    Chris-380 likes this.
  8. CaptainRandall

    CaptainRandall Member

    Dec 6, 2017
    1997 Sundancer 300
    Twin 260 Mercs
    I had the exact problem with my unit showing 'lo ac" this weekend. Although it is correct to say that it's probably a low voltage issue, it could also be an issue with a restricted flow of water. I cleaned out the filter which is just in from of the pump (which had a bunch of debris in it), and also the sea cock by flushing it backwards with a hose (got really wet tho). It's been two days and the AC is running great. Hope this helps.
  9. Robski97

    Robski97 Well-Known Member GOLD Sponsor

    Jan 15, 2007
    North Bellmore, NY
    Cummins QSC 8.3's
    Low water flow would not cause a LO AC alert. Restricted flow would cause the unit to go off on hi pressure.
  10. CaptainRandall

    CaptainRandall Member

    Dec 6, 2017
    1997 Sundancer 300
    Twin 260 Mercs
    I totally agree with what you are saying. I'm simply saying that I cleaned it out and have had no issue since. Perhaps my actions are not related to the unit working again, but that was the result!
  11. The Bill Collector

    The Bill Collector Well-Known Member GOLD Sponsor

    Jun 2, 2008
    Tacoma, WA
    1998 450 Sundancer, Achilles dinghy
    3126 Cat's
    Anytime we get under 200 volts from shore power the unit will shut itself down to avoid a brownout (burnup) situation... I have only experienced it at a couple of marinas in Canada because they are running 208-volt transformers and once you put a load on it you under 200 volts.
  12. CaptainRandall

    CaptainRandall Member

    Dec 6, 2017
    1997 Sundancer 300
    Twin 260 Mercs
    Mine will drop to 100 before it kicks off. I wonder if that is slowly ruining the unit?
  13. CaptainRandall

    CaptainRandall Member

    Dec 6, 2017
    1997 Sundancer 300
    Twin 260 Mercs
    Update on my 'LO AC' issue. Robski is right,cleaning the strainers isn't the solution to this particular problem (although it's still a good idea to do it). After running fine for a few days, I got the error message again. I checked everything with a volt meter i.e. the unit itself, the boat outlets, the power source. Everything was fine. Then I popped the cover off the wall unit, unscrewed it, detached the power source, cleaned the contacts on the board and the wire and put it back together. I also reset the unit to factory settings (this process is in your manual). It has been almost a week and it has been running great. Hope this helps.
    The Bill Collector likes this.

Share This Page

Show Sidebar