Main Function Temperature display,temperature controllingrefrigeration/heat mode)compressor start delay protection, it can run periodically with the on-off rate when the temperature sensor is broken. 2 defrost modes (electrie heat, hot gas),3 defrost start mode (time altemation, accumulative compressor running time, real time clock), 2 defrost end mode (timing, controlled by both temperature and time),dripping, manual defrost,7 fan running modes (fan ahead or delay start delay stop, temperature controlling start and stop,time controlling start and stop,always on, always off, run or stop when defrosting) sensor error alarm,one extemal alamm input, password. real time clock,C/F unit change. Technique Index 1Tempera ture displayrange: -50~150(The resolution is 0.1) -58~302F(The resolution is 0.1F 2Power supply: AC 220V±10% or AC 380V±10% 50Hz(Refer to the wiring diagram 3Operating environment:temperature -30~80 humidity85% 4Relaycontact capability: 8A/250VAC (pure resistive load 5Tempera ture sensor:NTC R25=5kB(25/50)=3470K