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Old 03-06-2010, 06:49 PM   #1
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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?

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Old 03-06-2010, 08:03 PM   #2
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New Install - Heat Pump Woes...


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

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Old 03-06-2010, 09:26 PM   #3
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New Install - Heat Pump Woes...


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.
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Old 03-06-2010, 11:04 PM   #4
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New Install - Heat Pump Woes...


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?
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Old 03-06-2010, 11:07 PM   #5
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New Install - Heat Pump Woes...


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.
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Old 03-07-2010, 05:43 AM   #6
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New Install - Heat Pump Woes...


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.
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Old 03-07-2010, 05:52 AM   #7
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New Install - Heat Pump Woes...


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)
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Old 03-07-2010, 09:14 AM   #8
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New Install - Heat Pump Woes...


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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