Hello all, newbie here. I self-installed an ASHP during the lockdown when I was unable to get anybody else to do it. It was checked over and certified by two qualified ASHP engineers. Problem is, it’s never been terribly efficient and I struggle to get a COP much over 2 which is awful (and pricy at …

A very interesting update for those who are curious about this: Samsung sent an engineer to check the refrigerant pressure yesterday and found that it was higher than it should have been (despite the earlier incident with the accidental release of refrigerant). He replaced the gas to a lower pressur…

Thanks, will have a look. BTW, do you know how to connect this PWM cable ? It has 3 wired but PWM terminal has only two screws. So I think I will connect BROWN cable to PWM signal and BLUE cable to Reference (GND) but where to connect the BLACK wire ? [IMG_7123]

one is a return signal I think which you don’t need. can’t remember which is which. plenty of info available if you get googling.

[image] Ian_Calderbank: can’t remember which is which. plenty of i Yeah, seems BLACK is output signal from pump so i will keep this disconnected. [image] Or is it vice versa? Do I need to connect signal input to the MIM or Signal output ? :slight_smile:

@Ian_Calderbank Sorry for bother again but want to double check, if this is proper terminal to connect ? It’s a bit chaotically written in manual. [IMG_7125] UPDATE: OK, connected like this and seems working :slight_smile:

[image] Michal_S: Hi Glyn, did you that if you set 20 it reached this temp, it’s off until it drops to 19 and then turn on right ? Still I don’t understand why there is no hysteresis possible to set on this controller. E.g. 0.5C. 1C is pretty big drop you may fell. I agree, it’s a shame the h…

Ian, could you please tell me what this settings mean exactly and what the difference between pump1 and pump2 and what means it there is no pump at all only on or off. Michal you’ve hit on one of the more impenetrable parts of the manual, which hasn’t been updated reflect to the current controlle…

we both have 1C hysteresis band, but you said yours, if you set it to 20, its off at 20 on at 19 right? whereas mine set to 20 would be off at 21 on at 20. it runs like that on cold days at least. actually on mild days like now that seems to be not true either. I get long stable burns with decent …

[image] glyn.hudson: my indoor temperature as measured by the controlle Hi Glyn, I will definitely take a look on your video. No I’ve finally setup the PWM cable. I’ve started the pump and set 22.5C on the indoor controller. I watched the temperatures. It startet both LWT, RWT at 28C… I’ve …

[image] Michal_S: So how do you think I should set it up. I want to have indoor temperature set at 22.5C. If your heat pump cannot get to 22.5C without cycling, your best choice would be to see if a lower set temperature works eg 18C. If it does, then you can try increasing the set temperatur…

[image] Michal_S: 20931 - compressor can be turned off only by room temp sensor. not quite understand what’s the meaning here and how if differs from other options. Can be turned of by room sensor OR according water law discharged water temp and here: 20932 - water pump is off once thermostat …

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