Thanks for the explanation of the subcooler. I haven't found any literature that explains it's purpose. Always figured it was to bleed off some liquid back to compressor when the load changes. Those older gen looks much easier to work on with the swing out doors . The gen 5's are annoying you have to unbolt the controls cabinet and lay it down. Ran into a lot of compressor issues with LG tons of compressor failures all of them seem to be liquid slugging. These units can throw you for a loop we had one unit where 2-3 units were not cooling and opening the EEV's to 500-600 pulses in cooling. We manually drove the EEV open with a tool and it slightly improved thought we had bad EEVs. Turns out the unit had a leak and was low on charge hence the capacity loss. More recently we had an issue with a unit freezing up in several minutes and shutting off no codes. Suction would tank like there was a restriction in the system. We kept focusing on the outdoor unit which was indeed the problem. Despite being auto piped and addressed the unit was not sending refrigerant to the indoors. I messed up recently on a repair of one of these units and cut the piping to install a new assembly turns out some of the pipe inside is metric. The amount of weird glitches we have seen is wild so easy to get thrown off. My only issue is the training the manuals do not explain much at all. Learned the most from the equipment rep field techs most of the stuff they teach you is not in manuals. I understand they are translated so some of the wording is confusing. It helps if write everything down you learn about VRF we don't see them all the time and its way too hard to recall from memory. The one thing I like about LG is their program.
Absolutely can tell you work on VRF lol...those are my thoughts too! And yes LGMV is great. One of the greatest Daikin VRV techs of all time lives in my area and he said he would do a podcast with me, but is very busy at the moment :)
Yeah that’s a pretty normal feeling and exactly how I felt when digging into it and trying to learn it all. Over time it starts to feel more familiar 😊👍
I see you have the helper over at the job site. He’s being a good crew member 😂. I never seen this style branch box with solenoids, it must be some antique stuff. Is it pre gen 3? I think they stopped using solenoids because they could be so much noise generated when switching from cooling to heat. Good to see you back at it again with the little one. God bless.
Thanks for the explanation of the subcooler. I haven't found any literature that explains it's purpose. Always figured it was to bleed off some liquid back to compressor when the load changes. Those older gen looks much easier to work on with the swing out doors . The gen 5's are annoying you have to unbolt the controls cabinet and lay it down. Ran into a lot of compressor issues with LG tons of compressor failures all of them seem to be liquid slugging. These units can throw you for a loop we had one unit where 2-3 units were not cooling and opening the EEV's to 500-600 pulses in cooling. We manually drove the EEV open with a tool and it slightly improved thought we had bad EEVs. Turns out the unit had a leak and was low on charge hence the capacity loss. More recently we had an issue with a unit freezing up in several minutes and shutting off no codes. Suction would tank like there was a restriction in the system. We kept focusing on the outdoor unit which was indeed the problem. Despite being auto piped and addressed the unit was not sending refrigerant to the indoors. I messed up recently on a repair of one of these units and cut the piping to install a new assembly turns out some of the pipe inside is metric.
The amount of weird glitches we have seen is wild so easy to get thrown off. My only issue is the training the manuals do not explain much at all. Learned the most from the equipment rep field techs most of the stuff they teach you is not in manuals. I understand they are translated so some of the wording is confusing. It helps if write everything down you learn about VRF we don't see them all the time and its way too hard to recall from memory.
The one thing I like about LG is their program.
Absolutely can tell you work on VRF lol...those are my thoughts too! And yes LGMV is great. One of the greatest Daikin VRV techs of all time lives in my area and he said he would do a podcast with me, but is very busy at the moment :)
I wish I understood the inverter workings as well as you do , that stuff seems so complicated to me man !
Yeah that’s a pretty normal feeling and exactly how I felt when digging into it and trying to learn it all. Over time it starts to feel more familiar 😊👍
I see you have the helper over at the job site. He’s being a good crew member 😂. I never seen this style branch box with solenoids, it must be some antique stuff. Is it pre gen 3? I think they stopped using solenoids because they could be so much noise generated when switching from cooling to heat. Good to see you back at it again with the little one. God bless.
Yeah honestly I havn't looked inside a lot of branch boxes...but yes I do think that what I showed is old tech especially compared to like a City BS!