Mo679

Hi, could you try out the cooling function of the machine? Thanks for your report, could you tell me what firmware you have on board?

I just got a mail from lg heating uk. They say in the uk the unit are not used to cool in summer, therefore they have no report of malfunction or bad modulation during cooling operation

Exactly, but I suspect this issue is relative to just the R32 machines, the older r410 have no report about cooling issue, but it could also be that cooling has not been fully investigated...

Hi Dave, I’m not using the room thermostat at the moment, but I used it in the past as the heat pump r32 has one integrated in the remote panel RS3. it never gave me flow error. I’m just complaining about the poor optimized software and inverter control in cooling operation. I put up a complex monitoring with a heat meter and flow meter, plus many temp sensor to calculate COP, and the unit worked silently whole winter. I made the assistance notice this modulation problem last year and they just joked me around, thins summer I came back with data and numbers, asking for a reply or to see a test setup working, I also asked for a solution I bought a modulating heat pump, i got an on-off one(in summer operation) I had to modify my plumbing, add a 50Lt buffer vessel on the return, just to show that the malfunction was not due to my particular setup. the head heating ing, than called me admitting, after one year of email and a lot of money and time invested, that the unit “ shows a particular behaviour, not reaching the full modulation potential while cooling”. So he prepared a report to send in Korea. We’ll see net year if they come up with someting..

Hello everyone, I read the whole topic and found it very interesting, I’m owner of a Therma v r32 9kw and I would like to share my experience. I own the heat pump since a year, in winter and heating operation it worked flawless, modulating down to 360wh from my monitoring and down to 1.8kw heat power. unluckly the heat pump never worked fine in cooling operation, showing a modulation of min. 5.5 kw of heat power, making it basically on on off heat pump in the summer until the temperatures really go high. what kind of behavior did you observed in the older r410 model? Does it modulate during cooling operation? Thans s lor