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02-02-2012, 02:26 PM #1
PUHYP400MFB Indoor Units Stay in Cooling
Hello,
I'm working on a Mitubishi PUHYP400MF-B which is connected to a Procon Y-ACO. From what I can gather the Y-ACO has a room sensor and dictates whether the outdoor unit runs in heating or cooling. My problem is that even when I raise the temperature on the Y-ACO and the green light goes off (indicating heating) the indoor units remote will not go into heating, they stay in the cooling mode even if the remote setpoint is raised. I would appreciate ny help with the above.
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03-02-2012, 02:12 AM #2
Re: PUHYP400MFB Indoor Units Stay in Cooling
Indoor unit SW 3-1 may set to ON (Cooling only instead of Heatpump). (Unlikely but check)
Check on Outdoor's Auto change over CN3N (3wire adaptor cable)
1 and 2 short/closed >> heating only
1 and 3 short/closed >> cooling only
Most likely Procon interlock with this.
Hope this will help.
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04-02-2012, 03:25 PM #3
Re: PUHYP400MFB Indoor Units Stay in Cooling
Thanks JoeAT50A,
i'm due back next week so i shall have a look then
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04-02-2012, 04:20 PM #4
Re: PUHYP400MFB Indoor Units Stay in Cooling
Check the dead band setting on the YACO.
Mode shift is set point +/- dead band depending on original mode to avoid space temperature swings.
Is the controller in Automatic mode??
Cheers
StuLast edited by stufus; 05-02-2012 at 12:30 PM.
Tool's ? check ! Condom's ? check !
If you can't fix it , f*ck it !!!