Table of contents
Service manual
5
FTXF20~71A + FTXF20~25B + FTXF20~42C + ATXF20~71A + ATXF20~42C
+ RXF20~71A + RXF20~60B + RXF20~42C + ARXF20~71A + ARXF20~42C
Split Sensira R32
ESIE18-12E – 2021.02
2.5.2 Repair procedures .......................................................................................................................................... 65
2.6 Indoor unit main PCB...................................................................................................................................................... 67
2.6.1 Checking procedures...................................................................................................................................... 67
2.6.2 Repair procedures .......................................................................................................................................... 69
2.7 Inverter PCB .................................................................................................................................................................... 72
2.7.1 Checking procedures...................................................................................................................................... 72
2.7.2 Repair procedures .......................................................................................................................................... 74
2.8 Main PCB ......................................................................................................................................................................... 74
2.8.1 Class 20~42 units............................................................................................................................................ 74
2.8.2 Class 50~71 units............................................................................................................................................ 84
2.9 Outdoor unit fan motor .................................................................................................................................................. 92
2.9.1 Class 20~42 units............................................................................................................................................ 92
2.9.2 Class 50~71 units............................................................................................................................................ 96
2.10 Plate work ....................................................................................................................................................................... 101
2.10.1 Outdoor unit ................................................................................................................................................... 101
2.10.2 Indoor unit ...................................................................................................................................................... 107
2.11 Reactor ............................................................................................................................................................................ 111
2.11.1 Checking procedures...................................................................................................................................... 111
2.11.2 Repair procedures .......................................................................................................................................... 114
2.12 Swing flap motor............................................................................................................................................................. 115
2.12.1 Checking procedures...................................................................................................................................... 115
2.12.2 Repair procedures .......................................................................................................................................... 115
2.13 Thermistors ..................................................................................................................................................................... 117
2.13.1 Refrigerant side thermistors .......................................................................................................................... 117
2.13.2 Other thermistors........................................................................................................................................... 124
3 Third party components 127
3.1 Electrical circuit............................................................................................................................................................... 127
3.1.1 Checking procedures...................................................................................................................................... 127
3.1.2 Repair procedures .......................................................................................................................................... 128
3.2 Refrigerant circuit ........................................................................................................................................................... 129
3.2.1 Checking procedures...................................................................................................................................... 129
3.2.2 Repair procedures .......................................................................................................................................... 133
3.3 External factors ............................................................................................................................................................... 136
3.3.1 Checking procedures...................................................................................................................................... 136
4 Maintenance 138
4.1 To clean the outdoor unit heat exchanger..................................................................................................................... 138
4.2 To clean the indoor unit heat exchanger ....................................................................................................................... 138
4.3 To clean the indoor unit heat exchanger in extreme condition .................................................................................... 138
4.4 To clean the air filters ..................................................................................................................................................... 139
5 Technical data 141
5.1 Detailed information setting mode ................................................................................................................................ 141
5.1.1 Detailed information setting mode: Indoor unit ........................................................................................... 141
5.1.2 Detailed information setting mode: Outdoor unit ........................................................................................ 141
5.1.3 Detailed information setting mode: Remote controller................................................................................ 141
5.2 Wiring diagram................................................................................................................................................................ 142
5.2.1 Wiring diagram: Indoor unit........................................................................................................................... 142
5.2.2 Wiring diagram: Outdoor unit........................................................................................................................ 145
5.3 Piping diagram ................................................................................................................................................................ 151
5.3.1 Piping diagram: Indoor unit............................................................................................................................ 151
5.3.2 Piping diagram: Outdoor unit......................................................................................................................... 155
5.4 Component overview...................................................................................................................................................... 161
5.4.1 Component overview: Indoor unit................................................................................................................. 161
5.4.2 Component overview: Outdoor unit.............................................................................................................. 162
5.5 Field information report ................................................................................................................................................. 163
5.6 Service tools .................................................................................................................................................................... 166
5.7 Field settings ................................................................................................................................................................... 167
5.7.1 Field settings: Indoor unit .............................................................................................................................. 167
5.7.2 Field settings: Outdoor unit ........................................................................................................................... 168
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