Protection Menu / 8.2 - Frost Protection

Together with flow protection, MiniHPC also uses the monitoring of temperatures at the heat exchanger to protect against freezing. These temperatures can be adjusted.

specifies the minimum allowable heating water temperature at the heat exchanger outlet. Water temperature below this threshold triggers the error message FP.

– if the circulation pump is off (for example, due to heating/cooling being switched off) and a lower temperature than the set value is detected on the NTC sensor T6 (temperature on the thin refrigerant pipe), the circulation pump R3 will be activated as a precaution against freezing of the heat exchanger. This situation may occur when a multisplit outdoor unit is used.

In cooling mode, the T6 temperature may drop below freezing point. If this condition persists for an extended period of time, there is a risk of water freezing in the heat exchanger. This protection evaluates this condition as an FP error if the T6 temperature is lower than the set value for longer than the set duration. This protection is not active during air conditioning defrosting.