[chirodox]

I have a totaline P474-1050 stat, Lennox cb29m-51-1p FAU, and a lennox HP 26-042-7P heat pump. It was working fine and one morning it stopped. There is a white wire hanging free in the FAU that looks like it should be connected. My wire path goes like this:
STAT FAU HP
R red R red R
G green G Green only connects stat to fau
Y1 ------- yellow------ Y1 passes through FAU to HP
W1 -------blue -------- O passes through FAU to HP
W2 white White from stat hangs free in FAU looks like it should connect
C Brown C brown C
W1 white W1 white from HP to FAU

We had a small earthquake ( I didn't feel it) that could have knocked a wirer loose, so I am curious if the white wire from the stat to the FAu should be connected to something.

The totaline stat has these connections,
G=fan
Y1 = cooling
W1= ,O/B heating and reversing valve
R= power
C= common
Y2= 2nd stage cooling
W2= 2nd stage heating

there is hand written markings on the fan drum schematic: white= W2, blue = reversing valve, brown = common

[wmproop]

Guess I`ve not been around long enough,, what is a FAU?

[chirodox]

Forced air unit, the air handler

[hvac1000]

AH is the accepted term.

See page 21 figure 15

This is a copy of your factory AH manual

http://www.hvacpartsshop.com/CB29M%20Series.pdf


THis is a copy I believe for your outdoor manual.

http://www.hvacpartsshop.com/HP29%20Series.pdf

Keep a copy of these on your computer for future use.

With these two manuals and the wiring diagrams you should be able to figure it out.

[chirodox]

My stat does not have the O connection. I believe that the W1 is being used for this purpose as it goes directly to the HP O terminal. I am not sure if my unit has electric heat or not. I did not install it. When I turn it on, the HP starts but nothing from the AH.

Thanks for the manuals. I have saved and printed both.