Mun mielestä tuolla ei ole mitään valintaa sille säädölle. Huolto-ohjeessa on avattu sitä ohjauslogiikkaa:
12.1.6.3 Zone Temperature Control Contents
During Standard System (Optional PCB not connected)
o Only 1 zone temperature control is available
o This zone room temperature is control by either one of the 4 room sensor (Room Th, Int/Ext Room Thermostat, Water temperature)
o Target Zone Water Temperature is calculated based on selected temperature control type (Compensation or
Direct) and selected room sensor. Target Water Temperature will set same as Target Zone Water Temperature
o Target Water Temperature is the temperature for heat pump to operate refer to indoor water outlet sensor.
o Heat pump and water pump OFF when ROOM Thermo OFF (Zone thermo OFF by Room Th or Room
Thermostat).
Toi viimenen kohta on mielenkiintoinen. Eli sen ymmärrän että kompressori sammutetaan jos tuon ohjainpaneelin sammuttaa napista. Mutta että vesipumppukin pysähtyy? Toisaalta tuolla on muualla määritelty se jäätymisen esto:
2. Water pump circulation anti freeze control
Water pump turns ON when ALL below conditions are fulfilled:
o Heatpump OFF (stand by) OR error occurs.
o Water flowing flag is ON.
o Water flow switch is not abnormal.
o Outdoor ambient temp. < 3°C OR outdoor ambient temp. sensor is abnormal.
o Water inlet/outlet temp. < 6°C.
o After 5 minutes from previous water pump OFF.
Water pump turn OFF when ANY of below conditions is fulfilled:
o Outdoor ambient temperature ≥ 4°C.
o During -5°C < outdoor ambient temp. < 4°C
After water pump ON for 4 minutes, and water inlet temp. ≥ 8°C.
Else, shift to back up heater anti freeze control.
o During outdoor ambient temp. < -5°C
After water pump ON for 4 minutes, and water inlet/outlet ≥ 20°C.
Else, shift to back up heater anti freeze control.
However, if flow switch is abnormal (H62), then water pump circulation anti freeze control will not activate.
Eli se pumppu kyllä pyörii näillä ehdoilla vaikka olisi muuten sammutettu.