Samsung ASHP gen 6 not heating when DHW set to forced

Nearlynaught · 2023-02-20T23:02:48Z

Hi there, I’ve been searching all over for help with our ASHP setup, it’s a new build and I’m struggling to get in touch with the installer. We have always run the system with forced DHW as anything less it runs out often. Recently we had to reset it back on to this as it frequently switches back to standard, when we did this we lost heating (underfloor and radiators, the underfloors are individual room controls, radiators a thermostat) I thought maybe something was broken, however running a self test showed the heating to kick in, you can see the light indicators on the heating zone motorised valves turn on with the test. If I turn DHW off, the heating zone valves kick in and my heating starts to warm up, however if they are on anything other than off or standard the valves turn off and close. I have no idea what is stopping this as we’ve always had both on, I get our hot water will be priority if needed but the heating is never getting a chance to turn on. Any ideas? Thanks!

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william1066

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22/02/2023 10:11 pm

Posted by: @nearlynaught

↑

I'm really surprised though because we have used forced since moving in and always had hot water and heating, its really confused me.

The installer may have changed the default, see the manual extract below.

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