Carrier 30RQ EXV problem
Hi All. I have 30RQ120 Chiller with AquaSnap Control System.
In cooling mode, the unit is working fine.
In the heat pump:
1. The unit starts up and gets into position EXV 27% and off for high pressure
EXV on the sensor does not respond - only 27%
I heated the sensor - no reaction - 27%
and off for high pressure
In what could be the reason?
Thanks in advance for your help
Last edited by steve wright; 01-06-2013 at 04:13 PM.
With that much info it is hard to troubleshoot it from the USA.
Generally if you are only opening 27% and the unit is shutting off by high pressure safety then you have a pressure problem. Overcharge or no water flow.
Originally Posted by Absorber1981
You should be able to force the EXV open If you know how to put the system into test mode.