Temperature and humidity control function, maximum 6 loop of independent step operating function Alternative operation by maximum 4 compressors and 8 heaters Backup operating function Prevention from frequent starting failure occurred by low pressure hunting using low pressure switch in compressor Successive starting function, pump down function and prevention from restarting function Control function for cold water, hot water, steam valve, SCR, damper designed for HVAC (4-20mA PID control) Detection of error in temperature and humidity sensor, alarm function and output of equipment state (cooling and dehumidification and heating and humidification)
