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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
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Last edited by steve wright; 01-06-2013 at 05:13 PM.
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With that much info it is hard to troubleshoot it from the USA.
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 Originally Posted by Absorber1981
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
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.
...Ron
Roof Rat
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You should be able to force the EXV open If you know how to put the system into test mode.
RTFM!!!
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