Operation at low temperatures requires a greater pressure differential and a different control strategy for the compressor and refrigerant circuit.
Operating envelope
Every compressor has a permissible operating range in terms of pressure, temperature, and speed.
Inverter control
The inverter adjusts the compressor speed to maintain the required power output without exceeding safety limits.
Limitations
At very low outdoor temperatures, the maximum frequency or flow temperature may be restricted.
Important
Not all heat pumps have the same low-temperature limits. Always use the data provided by the specific manufacturer.
