HP goes to Tank (DHW) = OFF ; with no error

[raomin]

It's not related to ESPAltherma per se (I guess I would figure it out 😉) but I have a strange issue lately with my HP and wondered if one could help.

I have my HP in DHW only. Over the last 3 days the HP went to Stop. When I go to the panel, under operation I see Space heating/Cooling OFF (normal) but also DHW/Tank OFF (not normal). The error log is empty. Just like if something turned DHW to OFF. When I set it back on, it immediately works as expected and heats DHW.

The timing of the 2 events looks random.

Someone had it too?

[aliban]

Yes, same here, making the relay change solves it

[raomin]

Which relay?

[aliban]

I've modified the code to use two relays one for heating one for cooling, only have seen once, I was not able to test with the multimeter , but setting the relay off, wait a pair of seconds and them turning on solves the problem (only failed a pair of times)