3
9.1.3 “FAN” Mode ....................................................................................................................................................... 34
9.1.4 “HEAT” Mode ..................................................................................................................................................... 35
9.2 Protection Features ................................................................................................................................................... 36
9.2.1 Mode Conflict (“E7”) ................................................................................................................................... 36
9.2.2 Overload Protection (“E8”) ................................................................................................................................ 36
9.2.3 Compressor Overload Protection (“H3”) ........................................................................................................... 36
9.2.4 Communication Malfunction (“E6”) ................................................................................................................... 36
9.2.5 Intelligent Power Module (IPM) Protection (“H5”) ............................................................................................ 36
9.2.6 Compressor Overpressure (“E1”) ....................................................................................................................... 36
9.2.7 Compressor Phase Protection (“Ld”) ................................................................................................................. 36
10. Error codes .................................................................................................................................................................... 38
10.1 Error Codes on Indoor unit panel ............................................................................................................................ 38
10.2 Flash codes on the PC board of outdoor unit ......................................................................................................... 40
10.2.1 Dual/Triple/Quad Ports .................................................................................................................................... 40
10.2.2 Five Ports .......................................................................................................................................................... 44
11. Troubleshooting ............................................................................................................................................................ 46
11.1 C5: Jumper Failure ................................................................................................................................................... 48
11.2 E1: High Pressure Protection ................................................................................................................................... 49
11.3 E2: Anti-Freezing Protection ................................................................................................................................... 50
11.4 E3: Low Pressure Protection ................................................................................................................................... 51
11.5 E4: Exhaust Protection ............................................................................................................................................ 52
11.6 E5: Over-Current Protection ................................................................................................................................... 52
11.7 E6: Communication Malfunction ............................................................................................................................ 53
11.8 E8: Overload Protection .......................................................................................................................................... 55
11.9 E9: Condensate Water Full in Indoor Unit .............................................................................................................. 55
11.10 F1/F2/F3/F4/F5: Temperature Sensor Failure ...................................................................................................... 56
11.10.1 F1/F3: Ambient Sensor for Indoor and Outdoor ............................................................................................ 56
11.10.2 F2/F4: Tube Sensor for Indoor and Outdoor .................................................................................................. 57
11.10.3 F5: Exhaust Sensor Failure ............................................................................................................................. 57
11.11 H3: Compressor Overload Protection ................................................................................................................... 58
11.12 H5: IPM Protection ................................................................................................................................................ 59
11.13 H6: Indoor Fan Motor Failure................................................................................................................................ 60
11.14 H7: Compressor Desynchronizing ......................................................................................................................... 61
11.15 HC: PFC Protection ................................................................................................................................................ 62
11.16 Lc: Startup Failure ................................................................................................................................................. 63
11.17 PU: Capacitor Charging Circuit Error ..................................................................................................................... 64
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