Trane ECGAH 250 SENSOR

[acdoctor]

Hi

We have a customer with the above chiller showing a sensor fault

A sensor 3 1/0


We have tried swapping the sensors around but the fault remains the same, ( There are 3 sensors)

Resistances between the sensors are similar , Trane want £80 each for the sensors, so we want to be sure to get it right first time

Anyone know an alternative sensor or has any experience on this fault

Thanks

[Grizzly]

Hi Doc.
Maybe this explaination will help?
Grizzly

[acdoctor]

Thanks for that I am even more puzzled !
think i need to go back to site and do a few tests as that doc seems to refer to a pressure sensor,
From the schematic info on the unit I presumed the fault was one of the thermistors but maybe its a pressure transducer issue

[Grizzly]

Doc.
it's saying either could be present check which, and use parameter limits specified to decide which is the issue?
It is telling you where to look now instead of 3 options as before.
Grizzly