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Does anyone use these for chillers or heat pumps?
How do you check the flow of the liquid trough heat exchangers?

1. You could try it for yourself. Connect nitrogen hose to the liquid line and remove the cap from the suction side valve on the compressor. Let it flow trough the evaporator and you will see that it...

I use similar tool made by Spin tools. https://youtu.be/yErZXE0twWo
Good idea but you must have very good drill machine - strong, fast and precise. It must able to reach at least 1800 rpm and its...

Maybe this will speed up the process:
Highsidechem - Thawzone (not allowed to post the link)

Carefully check the manual of Carel controller. It can be programmed to count the number of trips on digital inputs where protectors are connected (pressure, current, temp...)
If the number of...

You probably already solved it.
Just to mention my experience with small European model UME425A80.
Sometimes it was locked out due to "Hi-Amp" error. At the end we found out that starting relay of...

It seems that you mixed circuit numbers in your explanation. Its confusing.

Sub-cooling in circuit #2 is too high. I think that there might be 3 reasons for that or combination of any of them.
1....

Colleagues already explained the purpose of the "holding tank" aka. liquid receiver between the condenser and TXV (mechanical or electronic).

But, the other one, between the evaporator and...

I dont use analog since I bought these 5-6 years ago. No problems with them and they saved me lot of time and effort, not to mention the dough :)
They are kept in the original plastic case, with...