8913.2 Protection Control for Heating Operation13.2.1 Outdoor Air Temperature ControlThe maximum current value is regulated when the outdoor air temperature rises above 14°C in order to avoidcompressor overloading.13.2.2 Deice OperationWhen outdoor pipe temperature and outdoor air temperature is low, deice operation start where outdoor fan motorstop. Deice judging condition Deice mode selection conditiono There are 2 deice modes, according to water inlet temperature and outdoor ambient temperature the deicemode is decided.Judgement details:1) When water inlet temperature is more than 50°C, unit will operate deice mode 1.2) When water inlet temperature is less than 27°C, unit will operate deice mode 2.3) When water inlet temperature is less than 50°C and outdoor ambient temperature is less than -10°C, unit willoperate deice mode 2.4) When water outlet temperature sensor 2 detect temperature is less than 22°C, unit will operate deice mode 2.-30-30 -20 -10 0 10 20 30-25-20-15-10-50510OD Pipe Temperature (°C)Outdoor Unit Deice Controlline for continuous 3 minutesand Pipe Temperature below thisWhen Heating Time > 35 minutesOutdoor Temperature (°C)3. Heating accumulation time1. Outdoor air sensor temp.2. Outdoor pipe sensor temp.Deice start depends:50°C27°C-10°CWater inlet temperatureOutdoor ambient temperatureDeice mode 1Deice mode 2
