For Carrier 30hxy/HXC type chillers, check the opening degree of the electronic expansion valve. ?

This type of opening shouldn’t exist; it doesn’t seem to be called an “electronic expansion valve” either. There seems to be a thermostatically controlled throttle valve. It is recommended not to reset or modify the parameters set at the time of manufacture, as it is the program that controls everything and ensures the device operates in its optimal condition. If there are abnormalities, it could be due to leaks in the evaporator or condenser, or other mechanical failures. Adjusting or rewriting the program at this point will not solve the problem; instead, it may even exacerbate it. For reference only.

I just want to check his opening degree; I’m not trying to make any changes

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Ask Carrier’s after-sales support; I vaguely remember that it needs to be adjusted to the lower right corner, and then the button that looks like Enter needs to be held down for 4–5 seconds. You can give it a try

It’s the output in the lower right corner; 4.5 phases. Does this unit come with an economizer?