Table Of Contents - Gree LSQWRF35VM/NaA-M Service Manual

1 Product information ........................................................................................3
1.1 Introduction .............................................................................................3
1.1.1 Lineup .............................................................................................3
1.1.2 Nomenclature ..................................................................................3
1.1.3 Product features ..............................................................................4
1.1.4 Nominal operating conditions ..........................................................4
1.1.5 Operation range ..............................................................................5
1.2 Performance correction curves ...............................................................5
1.3 Working principle ....................................................................................6
1.4 Technical parameters ............................................................................10
1.4.1 Electrical parameters ....................................................................10
1.4.2 Performance parameters ..............................................................11
1.4.3 Scope of supply ............................................................................13
2 Unit control ...................................................................................................15
2.1 Schematic diagram ...............................................................................15
2.2 Operation flowchart ...............................................................................17
2.2.1 Cooling ..........................................................................................17
2.2.2 Heating .........................................................................................18
2.3 Key control logics ..................................................................................19
2.3.1 Cooling control ..............................................................................19
2.3.2 Heating control ..............................................................................19
2.3.3 Control to the compressor .............................................................20
2.3.4 Control to the fan ..........................................................................20
2.3.5 Control to the 4-way valve ............................................................20
2.3.6 Control to the water pump .............................................................20
2.3.7 Control to the electric expansion valve ..........................................20
2.3.8 Protection ......................................................................................20
2.4 Introduction to controller .......................................................................21
2.5 Smart management system ..................................................................21
2.5.1 Long-distance monitoring/BMS interface ......................................21
Contents