One of the most versatile low temperature controller, it offers three operating modes: refrigeration; heating; automatic. The heating mode has been designed for applications where external (environment) temperature is lower than the evaporation temperature. Featuring four relay outputs, two temperature sensors, a digital input which can be programmed for door alarm, force defrost or economic setpoint, built-in buzzer and digital filter. With a powerful 16A Relay, commands directly up to 1HP compressors. In addition to these features, has On-demand defrost and a shutdown mode to inhibit all outputs including relay switches and alarms. The collection of residual refrigerant fluid before the defrost cycles reduces power consumption and enhances the system performance.