A/C unit replaced and keypad activate

Discussion in 'General Discussion' started by BOB TYSON, Mar 20, 2019.

  1. BOB TYSON

    BOB TYSON Active Member GOLD Sponsor

    214
    Oct 5, 2017
    sarasota, fl
    2005 460 Sundancer
    Cummins 480 CE
    Just had A/C/ unit replaced with same brand model due to shot coils. Now key pad does not come on. Tech said unit blows cold air but doesn't understand why key pad does not work.
    I think they messed up the key pad on the install.
    Any ideas?
    Thanks,
    Bob
     
  2. bbwhitejr

    bbwhitejr Well-Known Member SILVER Sponsor

    Apr 14, 2013
    Lake Lanier GA
    2007 44DB
    Cummins QSC 8.3s
    I certainly do not know much about this, but I have been having some issues myself. For what I know, “triggers” are no longer used. There is a circuit board where the flat cable to the key pad(looks like a gray phone cord) plugs in. Make sure that is plugged in and tight. The key pad gets its power from this board. If it does not light up, something is not right with the board.....

    Bennett
     
  3. PlayDate

    PlayDate Well-Known Member

    Dec 25, 2006
    Washington DC
    1994 370 Express Cruiser
    454 Mercruisers
    Bob,

    Can you give us some more detail....model of system and keypad?
     
  4. BOB TYSON

    BOB TYSON Active Member GOLD Sponsor

    214
    Oct 5, 2017
    sarasota, fl
    2005 460 Sundancer
    Cummins 480 CE
    Thanks guys. Yes, its a Dometic DTU 16-410A. Keypad is an SMX ir.
     
  5. ttmott

    ttmott PhD in OCD GOLD Sponsor

    Apr 3, 2012
    Space Coast Florida
    2006 52 Sedan Bridge
    Cummins QSM11
    There may be multiple jacks, make sure it's plugged into the correct jack in the Q logic board.
    [​IMG]
     
    Chris-380, Cocktail Time and PlayDate like this.
  6. ZZ13

    ZZ13 Well-Known Member GOLD Sponsor

    Nov 25, 2009
    Lady's Island, SC
    2001 400 Sedan Bridge
    Cummins 450 Diamond
    Also make sure the installer did not extend the controller cable using a standard phone cable to reach the new jack location. That will not work. Ask me how I know?
     
  7. ttmott

    ttmott PhD in OCD GOLD Sponsor

    Apr 3, 2012
    Space Coast Florida
    2006 52 Sedan Bridge
    Cummins QSM11
  8. BOB TYSON

    BOB TYSON Active Member GOLD Sponsor

    214
    Oct 5, 2017
    sarasota, fl
    2005 460 Sundancer
    Cummins 480 CE
    great info. Thanks everyone! This gives me ammo when tech wants to hit me up for a new keyboard which, probably will anyway . At least Im not flying blind..
     
  9. Robski97

    Robski97 Well-Known Member

    Jan 15, 2007
    North Bellmore, NY
    44DA
    Cummins QSC 8.3's
    Mott nailed it . HE simply plugged into the wrong jack . Its either cruisair or marine air. That's the issue 99% of the time.

    Rob
     
    Chris-380 likes this.
  10. FootballFan

    FootballFan Well-Known Member PLATINUM Sponsor

    Jun 20, 2012
    Florida
    Marquis 59
    MTU Series 60
    Well, will offer a non scientific view.

    Unplug that key pad, let it sit for awhile - then plug it back in. (I have no technical or fact based explanation).

    We had just taken delivery of our 47DB in NC. Was leaving the next day to go to FL. AC quit on the bridge. MarineMax found us a tech that came out that night, replaced the controls and it worked. This was pop the cover out, take out a couple of screws and unplug/plug.

    I kept the old control cause I am a packrat.

    Few months later - quit again. Put the old controller back on and it worked. Swapped those two controllers more than once always got me back running.

    Suspect something in the thermostat part had to be without power for a long time, not a few seconds.

    I don't know. Sounds crazy I know. Frank W just go ahead and shoot me over my non scientific method - LOL.
     
  11. BOB TYSON

    BOB TYSON Active Member GOLD Sponsor

    214
    Oct 5, 2017
    sarasota, fl
    2005 460 Sundancer
    Cummins 480 CE
    thanks guys! Now Ive discovered that the cockpit speakers are not working. They were working when I left and prior to the A/c install. Head unit is coming on but nothing coming out of speakers. Wonder if the amplifier was shorted as well. circuit breakers are all "on". all other electronics seem to work. wish I would have been here when the install was done. A/C/ giy on his way.
     
  12. carterchapman

    carterchapman Well-Known Member TECHNICAL Contributor SILVER Sponsor

    Mar 25, 2008
    Lake Chickamauga/Marietta, GA/Ft. Myers, FL
    2006 Sea Ray 58 DB
    MAN CRM V8-900s, Twin Disc Drives; Onan 21.5 Generator
  13. PlayDate

    PlayDate Well-Known Member

    Dec 25, 2006
    Washington DC
    1994 370 Express Cruiser
    454 Mercruisers

    Bob,

    They are unlikely to be related. HVAC is AC powered and speaker system is DC. That said....anything is possible.

    In regards to the HVAC....your original unit was 14 years old and there have been multiple revisions to the control board over time (Mott's post #7). Some require adapters to work with the old keypads. What I would suggest is that he bring a new key pad and plug it into the control board to determine if it is an adapter issue, control board or original keypad problem.
     
  14. PlayDate

    PlayDate Well-Known Member

    Dec 25, 2006
    Washington DC
    1994 370 Express Cruiser
    454 Mercruisers
    Bob,

    One more thing.....the link Mott references includes this warning about the new Control Boards:

    Only works with SMXIR displays made from 2005 to present

    That would explain a compatibility issue if your keypad and original system were manufactured in 2004.
     
  15. BOB TYSON

    BOB TYSON Active Member GOLD Sponsor

    214
    Oct 5, 2017
    sarasota, fl
    2005 460 Sundancer
    Cummins 480 CE
    got it. Thanks again. ill post when the riddle is solved.
     
  16. FootballFan

    FootballFan Well-Known Member PLATINUM Sponsor

    Jun 20, 2012
    Florida
    Marquis 59
    MTU Series 60
    Why is it - when we leave our boats everything is working. Then 3-4 weeks later we show up at our boats and something is not working...

    Just part of the joys of remote boat ownership I guess.
     
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  17. BOB TYSON

    BOB TYSON Active Member GOLD Sponsor

    214
    Oct 5, 2017
    sarasota, fl
    2005 460 Sundancer
    Cummins 480 CE
    Yep. Just bought a keypad. Tech had no idea how or why it went bad.
     
  18. FootballFan

    FootballFan Well-Known Member PLATINUM Sponsor

    Jun 20, 2012
    Florida
    Marquis 59
    MTU Series 60
    Keep the old one.... Just saying
     
  19. PlayDate

    PlayDate Well-Known Member

    Dec 25, 2006
    Washington DC
    1994 370 Express Cruiser
    454 Mercruisers
    Is there is a model number/manufacture date on the back of the pad.....that could answer the riddle.
     

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