Haier HSU09 VHG(DB)-G&W Service Manual

Contents

HSU09VHG(DB)-SM Functions and control24Domestic Air Conditioner5.2.2˖The outdoor fan control (exchange fan)When the fan is changed among every airflow speed (including stop blowing), in order to avoid theairflow speed from skipping frequently, it must be kept under each mode for over 30 seconds, andthen it can be changed to another mode (when refrigerating, the time is changed to 15 seconds).5.2.2.1˖ The outdoor fan control when refrigerating or dehumidifyingAfter the compressor is started for 5 seconds, the outdoor fan is started at the medium speed at first,after 30 seconds,it begins to control the airflow speed according to the temperature conditions of theoutdoor environment.5.2.2.2˖The outdoor fan control when heatingThe temperature of the outdoorair ˄Ta˅Airflow speedTa≥22ć Low19ć≤Ta<22ć Keeping the speed16ć≤Ta<22ć Medium14ć≤Ta<16ć Keeping the speedTa<14ć High5.2.3˖The control of the outdoor electronic expansion valveWhen starting the compressor: the opening size of the valve must be guaranteed to have entered intothe standard opening size, and then the compressor can be started.When refrigeration is in vain (the machine is shut down or is in the state of retrograde operation), theopening size of the expansion valve of the indoor unit is 5 steps;When heating is in vain, the opening size of the expansion valve of the indoor unit is 55 steps;When the outdoor unit is shut down, the valve is opened completely for 2 minutes, and then begininitialization.The scope of refrigerationg valve 90-----480 stepsThe scope of heating valve 80-----480 stepsThe valves are adjusted according to the degree of superheat —SHaˈƸSHa.The temperature of theoutdoor air ˄Ta˅The temperature of the outdoorcoil˄Te˅Airflow speedTa≥30ć hgiH——26ć≤Ta<30ć deepsehtgnipeeK——24ć≤Ta<26ć muideM——23ć≤Ta<24ć deepsehtgnipeeK——5ć≤Ta<23ć woL——Ta<5ć 15ć≤Te Low15ć>Te Stop