Question about Shaw Robert RS-9420 Thermostat

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T stat shows -AC why? - Shaw Robert RS-9420 Thermostat

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Perhaps it's running on the battery back-up and is telling you that the AC isn't on to the unit.
See if the wires broke off the screw terminals. It'll have to be the + OR the - in the board.
It's not THAT unusual since the wires are thin and get nicked when trimmed for installation.

Posted on Feb 08, 2011

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1 Answer

Is this a thermostat problem or system failure?


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Can you please help me on how to calculate mean, median, mode, standard deviation calculation on casio fx-991ms scientific calculator


This will show you how to do statistics (calculate average, standard deviation, regressions etc.) as to the mode and median refer to the definitions.

TO COMPUTE STANDARD DEVIATION AND 2-VAR STATISTICS.

I assume you know the theory. I will show you the key strokes

For 1-Var statistics
Press [MODE][3:STAT] [1:1-VAR]. You are ready to enter values in the X column.
Enter a number and press [=]. Cursor jumps to second number to enter.
Keep entering numbers and pressing [=] till all numbers are in. Press the [=] key after the last one.
Press [AC] key to clear the screen.
Press [SHIFT] [STAT] (above digit 1.) then [5:Var]. Screen displays the statistical variables 1:n ;2: x bar; 3: x sigma n; 4:x sigma n-1.
Press the number corresponding to the statistical value you want, ex 1:n . The variable appears on screen. Press [=] and it will be displayed.
To display another variable press [SHIFT][STAT][5:Var][ 1,2, 3, or 4] .

To access the sum of squares sigma x^2 and the sum of data sigma x press[SHIFT][STAT][4:SUM] then [1: for sigma x^2] or [2: for sigma x]. Press [SHIFT][STAT][6:MinMax] to access minX and maxX.

For 2-var statistics
To perform 2 variable statistics you press [MODE][3:STAT] and any of the other regression options (except 1:1-Var). A two column template opens where you enter the X and Y values. When finished entering data, press [SHIFT][STAT][5:Var]. to access the different statistics. As I assumed above, you should be able to recognize what each variable means.


Apr 19, 2011 | Casio FX-115ES Scientific Calculator

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My G15 LCD Display wont work with World of Warcraft, I'm wondering how i can make it display WoW Stats and how to change the stats it changes. Any help would be great!


I know for me I had download the newest drivers directly from Logitech before my WoW stats would show up. Here is a link to the download web site.

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My ac thermidistat control box is out how can i turn it back on i drain the out side pipe and the box won't turn on i check the fuse box and it's on


t stat is bad jump t stat red white yellow wires tie together will start ac if it works t stat is bad .shut breaker off first for air handler .Run to test untie wires when done.

Dec 15, 2009 | Heating & Cooling

1 Answer

How to do standard deviation


Hello,
I assume you know the theory. I will only show you the key strokes for 1-Var statistics.
Press [MODE][3:STAT] [1:1-VAR]. You are ready to enter values in the X column.
Enter a number and press [=]. Cursor jumps to second number to enter.
Keep entering numbers and pressing [=] till all numbers are in. Press the [=] key after the last one.
Press [AC] key to clear the screen.
Press [SHIFT] [STAT] (above digit 1.) then [5:Var]. Screen displays the statistical variables 1:n ;2: x bar; 3: x sigma n; 4:x sigma n-1.
Press the number corresponding to the variable you want, ex 1:n . The variable appears on screen. Press [=] and it will be displayed.
To display another variable press [SHIFT][STAT][5:Var][ 1,2, 3, or 4] .

- To access the sum of squares sigma x^2 and the sum of data sigma x press[SHIFT][STAT][4:SUM] then [1: for sigma x^2] or [2: for sigma x]. Press [SHIFT][STAT][6:MinMax] to access minX and maxX.

To perform 2 variable statistics you press [MODE][3:STAT] and any of the other regression options (except 1:1-Var). A two column template opens where you enter the X and Y values. When finished entering data, press [SHIFT][STAT][5:Var]. to access the different statistics. As I assumed above, you should be able to recognize what each variable means.

Hope it gets you started

Dec 06, 2009 | Casio FX-115ES Scientific Calculator

1 Answer

Duo Therm AC won't cut off with thermostat


Hi, sounds to me like the thermostat is at fault.You have done nothing wrong to it but cover it up. The t-stat is what controls it, turns it on and off. The only other thing that would keep it on all the time would be that the thermostat wiring could be touching together from the stat up to the unit. You might check that before replacing stat. I have seen this many times.You can start the unit and go up top and disconnect the stat wire and it should stop the unit.Then its either the wire or stat.Let me know what you find,
Sincerely,Shastalaker7

Nov 04, 2009 | Heating & Cooling

1 Answer

I want to wire digital wall mount thermostat to my window AC unit


I think you are wright and also may lead to short cycle and burn the start relay on compressor(it may be too hot to be without air just now)try bigger relay when it is a bit cooler and 24,000btu must220-240 volts be very careful

Aug 20, 2009 | Heating & Cooling

1 Answer

RV A/C COMPRESSOR RUNS CONSTANTLY


You must isolate the problem by disconnecting the thermostat wires that go to the unit. If the compressor does not run when the t-stat wires are disconnected, that shows that the t-stat is malfunctioning, or there is a short in the wiring between the t-stat and the ac unit.

If the unit continues to run after disconnecting the t-stat wires, then you'll have to look in the unit for a stuck relay

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5 Answers

Thermostat - Honeywell Chronotherm III


What you can do is try and clean the contacts. Open the door on the thermistat and remove the two screws, after that you can seperate the part that is mounted to the wall and the front panel. Look at the part that is mounted on the wall and you'll see the contacts that should be a copper color. They might be black from age. Clean them and you'll be surprised how well it will work after that.

Denis

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