AC inverters are the most flexible and consolidated solution for ensuring considerable energy savings, due to the wide use of AC induction motors in refrigerant circuit components (fans, pumps and compressors). Inverter can reduce motor speed and consequently energy consumption when maximum capacity is not required.

CAREL offers various modules for HVAC/R units, including fan, pump, and compressor speed control. These modules are designed to fulfill specific applications and functions in air conditioning and refrigeration units. The fcs range of controllers is available for condensing pressure control, and they can be used either independently or in conjunction with pCO sistema controllers. These controllers come in both single and three-phase versions. Additionally, CAREL provides the MCHRTF controllers with single-phase power supply for parametric controllers like the μchiller range. These controllers are compatible with programmable pCO sistema controllers and can manage a range of voltage and current requirements for fans.

power+ is a special inverter that can control compressors with permanent magnet brushless motors (BLDC/BLAC) Integrated into pCOsistema+, it brings significant energy savings by modulating compressor speed and consequently the cooling capacity of the unit. Variations in load are managed precisely and with constant control of the compressor envelope. This makes significant increases in unit COP possible during operation at part load, giving higher seasonal performance factor values (SPF).