to Christian & Trystan
Following a morning where the Heat Pump , again , spectacularly failed , with the Water Flow Temperature , again rising to "impossible " values greater than 55 C, I may have , finally, found the cause, if not the solution.
When the Flow water temperature is set and controlled by the Weather compensation system, Field option 2091 options 2, 3 and 4, the Temperature control system can become unstable.
This instability manifests itself in large “Ringing” Flow water Temperature overshoots.
Changing anything within the feedback loop , Hysteresis ( 2091 opts 2,3 or 4) , Switching the volumising tank on or off , rapidly changing the Water Law offset , ALL result in the large Water Temperature overshoots.
The overshoots result in large Flow water temperatures peaks above 55 …65 C! Alarming!!
With Weather compensation controlled by the outside Air Temperature Thermistor , and with the Thermistor being easily replaced , replacing the Air Temperature Thermistor would be my preferred
In the interim I have switched OFF the Weather Compensation control ( Field Control 2091/2092 OFF , 2093 ON with option 2), relying on the Thermistor behind the Samsung Control panel to control the Water Temperature.
So , far, the Heat Pump has remained stable when controlled by the room thermistor.( 2093 opt 2) .
So, I have a "workaround " to get the beast up and running.
How , and where do I get a replacement Air Temperature Thermistor for a Samsung Heat Pump?