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-   -   New Install - Heat Pump Woes... (http://www.diychatroom.com/f17/new-install-heat-pump-woes-66177/)

mark1210 03-06-2010 06:49 PM

New Install - Heat Pump Woes...
 
Hi Folks--

Well my installer's supervisor can't come out for a week, the installer verified pressure and txv and were fine. I decided I'd look at the wiring as I'm pretty technical. The Payne (PH13NA) Heat pump was replaced from a along with my coil. I have a Carrier Air Handler/Furnace (58RAV) and a Carrier Heat Pump Thermostat (TSTATCCPHP01).

The unit works just fine in COOL mode, in HEAT mode, the heat pump kicks on and then goes off a few seconds later. In emergency heat mode, the gas furnace kicks on just fine.

The TXV and Unit is properly charged per the tech. I don't believe the reversing valve is getting signal.

Here is the wiring, - First entry is the Air Handler, Second entry is the Thermostat, third entry is the Heat Pump:

Handler | Thermostat | Heat Pump

Common Common Common
W W W
Y Y Y
R R R
G G -
O O

W = WHITE
Y = YELLOW
R = RED
G = GREEN
COMMON = BLUE
O = BROWN

Any suggestions?

bervin306 03-06-2010 08:03 PM

The O wire needs to go to the outdoor unit as well. That is what switches the rev. valve.

mark1210 03-06-2010 09:26 PM

Sorry - I should have corrected that...

The 0 Wire goes from the thermostat to the heat pump....it isn't connected to the air handler.

Not sure if its energized by the thermostat or not.

sktn77a 03-06-2010 11:04 PM

As best as anyone can tell, it looks to be wired correctly. Payne and Carrier both use the reversing valve on cooling (Orange). Does your thermostat need to be programmed for O or B operation?

mark1210 03-06-2010 11:07 PM

I think it already is....is there a way to jumper the reversing valve to determine if it the culprit?

What sends the power to O/brown...the termostat or air handler? There isn't a wiring teminal for O on the handler...that wire bypasses te handler an is spliced.

Marty S. 03-07-2010 05:43 AM

O is not energized in heating. Honestly since it's a new install and all the work is warranty let them figure it out. If you want to tinker before they come back get the meter out and check Y at the HP and check the pressure switches.

mark1210 03-07-2010 05:52 AM

O - does not appear to be energized when in HEAT mode. Interesting...does the thermostat provide power for "O"?

I ask because the "O" wire isn't connected anywhere on the airhandler, I don't see a terminal for "O" on the handler anyways.

The air handler only has these terminals:

Com
W
Y
R
G

The O wire goes directly from the thermostat to the outdoor condensor where it's connected to an Orange wire.

Is there a way I can jumper the orange wire to something else (bypass the thermostat for testing)

sktn77a 03-07-2010 09:14 AM

The system is working fine in cool mode so the O terminal is energizing as it is supposed to. Your problem lies elsewhere.


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