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-   -   Lux thermostat help (http://www.diychatroom.com/f17/lux-thermostat-help-158449/)

emmd2001 09-30-2012 10:50 AM

Lux thermostat help
 
I am installing the Lux LX9600TS with an American Standard heat pump.

The cooling mode works fine, but I can not get the heating mode to work. The unit was previously operating with a Honeywell thermostat, with an orange wire connected to a terminal labelled "O/B" on the thermostat.

I have the wires hooked up as following:
Green to "G"
Orange to "O"
Yellow to "Y"
Red to "RC"
White to "W2"
Brown to "C"
Jumper from "RC" to "RH"
Jumper from "Y" to "W"

Gas/Electric switch "Down" (Which should be electric based on what is printed on the circuitboard)

Switch 1 "On"
2-6 'off'
7 'on'
8 'off'

Additionally, the unit makes a humming sound whenever the backlight is on... is this normal?

Houston204 09-30-2012 12:06 PM

Did you allow 5 minutes for the heat to start?
Does the fan run in heat mode?

http://i151.photobucket.com/albums/s...uxTX9600TS.jpg

emmd2001 09-30-2012 12:32 PM

Yes, unit sat for > 15 minutes with no response.
The fan does NOT turn on in heat mode.

Houston204 09-30-2012 01:40 PM

Move the gas/elec switch up.
The manual states that down = gas.

emmd2001 09-30-2012 02:02 PM

Quote:

Originally Posted by Houston204 (Post 1020563)
Move the gas/elec switch up.
The manual states that down = gas.

Tried that as well, still no response. Thought maybe the instruction was backward as it contradicts what is printed on the circuit board for that switch, but it doesn't work either way...

hvactech126 09-30-2012 02:06 PM

return the Lux and get a Honeywell thermostat

emmd2001 09-30-2012 02:08 PM

Quote:

Originally Posted by hvactech126 (Post 1020578)
return the Lux and get a Honeywell thermostat

Why? That doesn't help much...

hvactech126 09-30-2012 02:17 PM

Because Lux is not a good thermostat manufacturer. Test your system operation by touching red and green together to make sure your blower comes on.

emmd2001 09-30-2012 02:32 PM

Quote:

Originally Posted by hvactech126 (Post 1020585)
Because Lux is not a good thermostat manufacturer. Test your system operation by touching red and green together to make sure your blower comes on.

Yes, the fan does turn on with that.

The unit works fine w/ AC or even just the fan switch on, but does nothing in heat mode...

hvactech126 09-30-2012 02:38 PM

bad thermostat............... again, buy a honeywell.

ben's plumbing 09-30-2012 07:26 PM

did you bypass thermostat for heat mode at control board to see if it will fire up... this will tell you if stat is problem...:yes:

hvactech126 09-30-2012 07:34 PM

Ben, it is a heat pump so there will be no "firing up".

Op, if you want to bypass the thermostat to check for proper operation you would need to jumper R to Y and G. This will simulate a call for first stage heating (heat pump in heating mode)

ben's plumbing 09-30-2012 07:38 PM

Quote:

Originally Posted by hvactech126 (Post 1020748)
Ben, it is a heat pump so there will be no "firing up".

Op, if you want to bypass the thermostat to check for proper operation you would need to jumper R to Y and G. This will simulate a call for first stage heating (heat pump in heating mode)

helps to read all before opening mouth...my bad thanks.... out here in pa used to furnaces firing up....not going into heat mode......


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