Carrier 30RQ EXV problem

[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

[steve wright]

Removed sorry no *

[Dallas Duster]

With that much info it is hard to troubleshoot it from the USA.

[rscamaro]

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

[manny238]

You should be able to force the EXV open If you know how to put the system into test mode.