carrier rtu economizer calling for one compressor

[iced-tea]

I cant figure this one out..
Carrier rtu economizer only calling for one compressor..
I checked for 24v from the thermoststa to y1 and y2.
The board only sends a signal at C1 for compressor#1.C2 TERMINAL for COMPRESSOR#2
Does not have a signal..I attempted to manual program the
Economizer to call for c1 and c2..that did not work..
I read there is a temp sensor that looks at supply air and shuts down 1 comp on temp drop..heck its 100 degress here in virginia..any suggestions..


[Edited by iced-tea on 08-04-2005 at 08:31 PM]

[coldndn]

does this unit have one of the new carrier 4 led economizers ?

[iced-tea]

yes it does have the 4 led light..
with both lights on for the compressors...

[sonc]

Go here http://www.xpedio.carrier.com/intradoc-cgi/nph-idc_cgi.exe?IdcService=GET_LITERATURE_QUERY_PAGE&dDocType=TechLit

and search for "Catalog No. 534-80202"

If the supply air sensor fails the module lets the t-stat control the comps directly.

Are you sure the board is configured for 2 comps? Should be factory default, but you never know who's been playin with the damn buttons (not the easiest control to set-up, if you don't see them every day)

[Edited by sonc on 08-06-2005 at 07:36 AM]

[iced-tea]

Thanks for the link sonc..
your right about programming this board-its a booger!!!
I WILL GO BACK INTO THE SETUP AND CHECK THE CONFIGURATION SETPOINTS-DARN ITS A PAIN..YOU HAVE TO SIT THERE AND COUNT THOSE FLASHING LIGHTS FOR EACH SETTING..
I WILL LET YOU KNOW HOW IT WENT..
THANKS

[sonc]

Originally posted by iced-tea
yes it does have the 4 led light..
with both lights on for the compressors...

If both green led'3 are on, C2 should be closed..if not change the board.

Good luck and let us know how it goes

[coldndn]

this board is a real pain in the ass to program, an extra man to read out the perameter numbers will help. if you mess up or lose your place, just pull the 24v plug and it will take you back to #1 without resetting the perameters you previously set. trust me it will happen. i hope you only have one unit to do.

[iced-tea]

okay sonc,thats what i thought-i will get a new board ordered on monday
thanks...

yea coldndn,
you darn near two people to program this econ-board..
with counting flashing lights and two seconds to press a button..carrier could do a full 8 hours course on this board alone...

[Wirenut]

They will do a 8 hour course soon and spend 4 hours telling us how great the control is!!

[iced-tea]

yea,i know!!!
lol

[jrbenny]

They're already going back to the potientometer style controller. Novar blinky light controller is being phased out. Thank you, Lord!

[ac/dc]

Jrbenny you made my day, I didnt know they were phasing
out they're new blinky light control. This is very good
news to me. It took me an hour to change the min. pos.
on one. Glad to see them go!