Carrier Air Cooled Chiller

[allwyn-kms]

Dear All,
We have 2 Carrier air cooled chillers 30 GTR070. both the units circuit B does not get commad to start from the processor board K5 relay. we presume the demand to start the other compressor is there as water temp is high. is their any configuration required, any help
thanks in advance

[Yuri B.]

However I do not know that Carrier, first that comes to mind is "system B off" on both chillers, maybe?

[Gigas]

i'm not sure about carrier chiller but maybe there's setting problem on both chiller. propably setting for compressor system B is off.

[lowcool]

are A compressors running ?

[Brian_UK]

Source for manual here...
http://eto.carrier.com/lit.asp

[allwyn-kms]

lowcool yes Circuit A compressors are working. circuit B compressors does not get command to start even though there is a demand for cooling. this is same for both chillers.
Brain thanks for the link
sorry could not get any solution

[lowcool]

is the cooling demand output voltage from controller or indicator light,sounds like something either not commissioned properly or hi side coolling is not effective,im only a commercial fridgy and probably never seen what you got.sounds like this is first time problem,how old is plant.

[allwyn-kms]

Lowcool
Circuit A is working fine
But Circuit B does not get any command to start. its is the case with both chillers

[cool_tech]

sounds to me as if this chiller was not commisioned properly either there is a dip switch not on/off or control not set up correctly. it looks like it does not know there is a circuit B. If you take off a hp or lp transducer see if that brings up a fault and it is comunicating to circuit B. if you put the control in LOCAL ON will it stage up all circuits?

[icecube51]

someone being messing around whit the control panel ????
see if a complete factory reset helps. ceep a manual at hand for comparing in/outputs.

Ice