Haier HSU24VHJ(DB) Service Manual

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HSU24VHJ˄DB˅ Funcitions and ControlDomestic Air Conditioner215.2 Main functions and control specification of outdoor unitSensor Code Definition: Tai= Indoor Ambient Temperature, Tao=Outdoor Ambient Temperature,Tc1=Indoor Coil, Td= Air Discharge, Te= Outdoor Coil, Ts=Air Intake5.2.1 Outdoor Unit Operation Frequency and ControlCompressor Operation Frequency RangeCompressor Operation Frequency Range:Outdoor Temperature ≤4 4ī18 ≥18Heating˄Hz˅ 20ī110 20ī90 20ī53Defrosting˄Hz˅ 80Outdoor Temperature ≤23 23ī32 ≥32Cooling˄Hz˅ 20ī50 20ī70 20ī95Compressor StartupRegardless of target frequency of indoor unit, each time when compressor is from off to on, itmust maintain 60Hz,90Hz for one minute (Frequency will be immediately decreased under thecondition that outdoor unit air discharge temperature overheating protection is activated or overcurrent of compressor) then the compressor will operate towards target frequency. This processdoes not exist in normal operation of unit.HeatingWhen completing compressor startup operation, it will operate as per frequency of indoor unit.After 2 minutes, compressor operation frequency will be compensated as per relevant conditions.Cooling & Dehumidification:When completing compressor startup operation, it will operate as per frequency of indoor unit.After 2 minutes, compressor operation frequency will be compensated as per relevant conditions.Compressor Frequency Increase/Decrease SpeedRapid Frequency Increase/Decrease Speed 1 ----------1Hz/sSlow Frequency Increase/Decrease Speed 2 -----------1Hz/10s