30HXC carrier

[Garys18805]

I have a problem with oil pressure reading on a compressor.Itwill not read. I have replaced the oil pressure transducer on compressor with new one,I have changed trasducers with working compressor. And I have changed the SCB board. Still no reading. I checked wiring from transducer to SCB board. I get continuity on all wires still no reading. Any Sugestions?

[heavymetaldad]

you are sure you are getting in the circuit? scraeder fitting not opening, plugged maybe? may help to put in a t & chek w/ gage?

[Garys18805]

I did put guage on the oil line fitting I have 50 PSI.

[freonrick]

pull off the transducer and put it on a nitrogen tank or on a bottle of freon and see if you can read it. Can you read everything else? you can ohm out the cable like you did but that doesnt mean it is not making connection when it is plugged in.

[Dallas Duster]

Is there an alarm for the transducer failure or does it just read 0.0?

[Garys18805]

no alarm just zero

[Dallas Duster]

Sounds to me that ,that particular compressor may be disabled in service configuration.

[Garys18805]

All other pressures are there. Would putting it is sevice mode prevent just the oil pressure from measuring?

[Dallas Duster]

What is the m# of the machine .On gertain version of software when a compressors is disabled ,when you look at the pressures through the navigator the oil press for a disabled compressor will show 0.0.

[Garys18805]

THis sounds like what is going on. The full model number is 30HXC146RZ-661BA.
How do I fix this? You was right, I finaly got the right manuel for this chiller and found the right way to remove the disable. Thanks for the right direction!

[Dallas Duster]

Well do you know why the compressor might have been disabled?Thats an equal circuit chiller so capacity is split down the middle so maybe you do not have enough load and may have been causing problems short cycling.