... defrost modes (electric heat, hot gas), Main FunctionTemperature display, temperature controlling, compressor start delay protection, 2 defrost modes (electric ... to the wiring diagram)3,Operating environment: temperature -20°C~50°C, humidity≤85%4,Relay contact capability: 8A/250VAC ... (pure resistive load)5,Temperature sensor: NTC R25=5kΩ, ...