Gree FGR20/BNa-M Service Manual page 3

1.4 Installation Clearance Data ........................................................................................................44
1.5 Drain Piping Work ......................................................................................................................44
2 OUTDOOR UNIT INSTALLATION .......................................................................... 44
2.1 Before Installation ......................................................................................................................44
2.2 Installation Site ...........................................................................................................................45
2.3 Dimension Data ..........................................................................................................................45
2.4 Installation Clearance Data ........................................................................................................46
3 REFRIGERATION PIPING WORK ......................................................................... 47
3.1 Refrigeration Piping Work Procedures .......................................................................................47
3.2 Caution in Connecting Pipes .......................................................................................................47
3.3 Specification of Connection Pipe ...............................................................................................47
4 ELECTRIC WIRING WORK .................................................................................... 48
4.1 Wiring Principle ..........................................................................................................................48
4.2 Electric Wiring Design ................................................................................................................48
4.3 Specification of Power Supply Wire and Air Switch ................................................................... 49
MAINTENANCE ........................................................................................... 51
1 TROUBLE TABLE .................................................................................................... 51
2 FLOW CHART OF TROUBLESHOOTING .............................................................. 52
2.1 High Pressure Protection ............................................................................................................52
2.2 Low Pressure Protection .............................................................................................................53
2.3 Discharge protection ...................................................................................................................54
2.4 Overcurrent Protection ...............................................................................................................54
2.5 Communication Malfunction .......................................................................................................55
2.6 Temperature sensor malfunction ................................................................................................55
2.7 Indoor Fan Overloading Protection .............................................................................................56
2.8 F0 Failure of Indoor Room Sensor at Air Intake .......................................................................... 56
2.9 F1 Failure of Evaporator Temp. Sensor ......................................................................................57
3 WIRING DIADRAM .................................................................................................. 58
4 DISASSEMBLY AND ASSEMBLY PROCEDURE OF MAIN PARTS ...................... 62
5 EXPLODED VIEWS AND PART LIST ..................................................................... 64
5.1 Indoor Unit ..................................................................................................................................64
5.2 Outdoor Unit ................................................................................................................................72