Correct, I have seen data from someone who did this and the maximum frequency is capped at 70hz rather than 102hz roughly
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I thought that minimum input power is given by compressor. E.g. for Samsung they have for HT Quiet 3 versions 8KW, 12KW and 14KW. All have the totally same compressor. If there would be possibility to downgrade from 14KW to 8KW I think it would cap only the upper limit. Lower limit will be the same for all these 8kw, 10kw and 14kw units. E.g. for 8KW I saw minimum input power 650W. But I guess itās the same for 12 and 14KW models. They only have a bit better heat output.
Thatās right but usually for stable system you need to deliver more power, have better cooling, etc.
I would maybe not try upgrading of heatpumps (only in case every hardware is the same and itās limited only in software or those switches. Not sure if Samsung have some). E.g. 8KW version of Samsung has smaller heat exchanger and fan. SO upgrading would bring some problems Iām sure. And for downgrade there is nowhere to go. If I new this before I would probably buy 14KW unit and CAP the compressor upper limit to 50%. Bigger heat exchanger, bigger fan, better COPā¦ Price difference was negligible. Welp, lesson learned.
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One more important detail when upgrading. The models with letter V in them eg SHWM100VAA means that they are single phase. The ones with letter Y are 400V 3 phase. Most likely comes from the Y (wye) or star connection used in 3 phase.
Every upgrade on the V models requires a breaker upgrade as well as they draw more current.
The Y models doesnāt have this problem as they can all run on 16A 3 phase breaker.
So if you do the upgrade look in the manual for the correct breaker size.
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