SiBE041434E Control SpecificationFunction and Control 463.10 Defrost ControlOutline Defrosting is carried out by the cooling cycle (reverse cycle). The defrosting time or outdoorheat exchanger temperature must be more than a certain value to finish defrosting.Detail Conditions for Starting Defrost The starting conditions are determined with the outdoor temperature and the outdoor heatexchanger temperature. The system is in heating operation. The compressor operates for 6 minutes. More than A minutes (depending on the duration of the previous defrost control) ofaccumulated time have passed since the start of the operation, or ending the previousdefrosting.Conditions for Canceling DefrostThe judgment is made with the outdoor heat exchanger temperature. (B°C)+: The same value continues.20/25/35 class 42/50 classA (minutes) 28 20 ~ 25B (°C) 4 ~ 18 6 ~ 30C (Hz) 56 + 64D (Hz) 56 + 72E (seconds) 30 40F (seconds) 60 210G (seconds) 480 450H (seconds) 80 90J (pulse) 450 400K (pulse) 200 ~ 280 350 ~ 400L (pulse) 200 400FrequencyCompressorFour way valveFanONOFFONOFFONOFF0 Hz 0 HzC HzD Hz5 ~ 8 sec.PI control5 ~ 8 sec.H sec.(R21278)E sec.F sec.G sec.K pulse zoneElectronicexpansion valveopening NormalcontrolJ pulsezoneL pulsezoneStartingcontrol
