Gree GUD50PS/A-T - Page 4

3.4 Troubleshooting ............................................................................................................................................................. 41
3.4.1 ―E1‖ Compressor High Pressure Protection ................................................................................................................ 41
3.4.2 ―E2‖ Indoor Anti-freezing Protection .............................................................................................................................. 42
3.4.3 ―E3‖ Compressor Low-pressure Protection, Refrigerant Shortage Protection, Refrigerant Recovery Mode ..... 43
3.4.4 ―E4‖ Compressor Air Discharge High-temperature Protection .................................................................................. 44
3.4.5 ―E6‖ Communication Error .............................................................................................................................................. 45
3.4.6 ―E8‖ Indoor Fan Error ...................................................................................................................................................... 46
3.4.7 ―E9‖ Water Overflow Protection ..................................................................................................................................... 47
3.4.8 ―F0‖ Indoor Ambient Temperature Sensor Error .......................................................................................................... 48
3.4.9 ―F1‖ Evaporator Temperature Sensor Error ................................................................................................................. 49
3.4.10 ―F2‖ Condenser Temperature Sensor Error ............................................................................................................... 50
3.4.11 ―F3‖ Outdoor Ambient Temperature Sensor Error ..................................................................................................... 51
3.4.12 ―F4‖ Discharge Temperature Sensor Error ................................................................................................................ 52
3.4.13 ―F5‖ Wired Control Temperature Sensor Error .......................................................................................................... 53
3.4.14 ―C5‖ IDU Jumper Cap Error ......................................................................................................................................... 54
3.4.15 ―EE‖ IDU or ODU Memory Chip Error ......................................................................................................................... 54
3.4.16 ―PF‖ Electric Box Sensor Error .................................................................................................................................... 55
3.4.17 ―H3‖ Compressor Overload Protection ....................................................................................................................... 56
3.4.18 ―H4‖ Overload ................................................................................................................................................................. 56
3.4.19 ―H5‖ IPM Protection ....................................................................................................................................................... 57
3.4.20 ―H6‖ DC Fan Error ......................................................................................................................................................... 58
3.4.21 ―H7‖ Driver Out-of-Step Protection .............................................................................................................................. 59
3.4.22 ―HC‖ PFC Protection ..................................................................................................................................................... 60
3.4.24 ―Lp‖ IDU and ODU Unmatched .................................................................................................................................... 62
3.4.25 ―U7‖ 4–Way Valve Switch-Over Error ......................................................................................................................... 63
3.4.26 ―P0‖ Driver Reset Protection ........................................................................................................................................ 63
3.4.27 ―P5‖ Over-Current Protection ....................................................................................................................................... 64
3.4.28 ―P6‖ Master Control and Driver Communication Error ............................................................................................. 65
3.4.29 ―P7‖ Driver Module Sensor Error ................................................................................................................................. 66
3.4.30 ―P8‖ Driver Module High Temperature Protection ..................................................................................................... 67
3.4.31 ―PA‖ AC Current Protection .......................................................................................................................................... 67
3.4.32 ―Pc‖ Driver Current Error .............................................................................................................................................. 68
3.4.33 ―Pd‖ Sensor Connection Protection ............................................................................................................................ 69
3.4.34 ―PL‖ Bus Low-Voltage Protection ................................................................................................................................ 69
3.4.35 ―PH‖ Bus High-Voltage Protection ............................................................................................................................... 70
3.4.37 ―ee‖ Drive Memory Chip Error ...................................................................................................................................... 71
3.4.38 ―c4‖ ODU Jumper Cap Error ........................................................................................................................................ 72
3.4.39 ―EL‖ Emergency Stop (Fire Alarm) .............................................................................................................................. 73
3.5 Failures Not Caused by Errors ......................................................................................................................................... 73
4. MAINTENANCE ..................................................................................................................................................75
4.1 System Diagram .............................................................................................................................................................. 75
4.2 Connection Pipe Vacuum Pumping .................................................................................................................................. 75
4.3 Refrigerant Charging ....................................................................................................................................................... 76