Daikin FTXA25BB - Page 5

Table of contents
Service manual
5
FTXA20~50A(W)(S)(T) + FTXA20~50B(B)(S)(T) + RXA42+50A +
RXA20~35A(9) + RXA42+50B
Split Stylish R32
ESIE18-03D – 2021.05
2.4 Front panel motor........................................................................................................................................................... 65
2.4.1 Checking procedures...................................................................................................................................... 65
2.4.2 Repair procedures .......................................................................................................................................... 66
2.5 High pressure switch....................................................................................................................................................... 67
2.5.1 Checking procedures...................................................................................................................................... 67
2.5.2 Repair procedures .......................................................................................................................................... 69
2.6 Humidity sensor .............................................................................................................................................................. 70
2.6.1 Checking procedures...................................................................................................................................... 70
2.6.2 Repair procedures .......................................................................................................................................... 71
2.7 Indoor unit fan motor ..................................................................................................................................................... 73
2.7.1 Checking procedures...................................................................................................................................... 73
2.7.2 Repair procedures .......................................................................................................................................... 73
2.8 Indoor unit main PCB...................................................................................................................................................... 75
2.8.1 Checking procedures...................................................................................................................................... 75
2.8.2 Repair procedures .......................................................................................................................................... 78
2.9 Indoor unit power PCB.................................................................................................................................................... 81
2.9.1 Checking procedures...................................................................................................................................... 81
2.9.2 Repair procedures .......................................................................................................................................... 84
2.10 Intelligent thermal sensor............................................................................................................................................... 88
2.10.1 Checking procedures...................................................................................................................................... 88
2.10.2 Repair procedures .......................................................................................................................................... 88
2.11 Inverter PCB .................................................................................................................................................................... 89
2.11.1 Checking procedures...................................................................................................................................... 89
2.11.2 Repair procedures .......................................................................................................................................... 91
2.12 Main PCB ......................................................................................................................................................................... 91
2.12.1 Class 20~35 units............................................................................................................................................ 91
2.12.2 Class 42~50 units............................................................................................................................................ 99
2.13 Outdoor unit fan motor .................................................................................................................................................. 111
2.13.1 RXA20~35A3+5 units ...................................................................................................................................... 111
2.13.2 RXA20~35A2 + class 42~50 units ................................................................................................................... 115
2.14 Plate work ....................................................................................................................................................................... 120
2.14.1 Outdoor unit ................................................................................................................................................... 120
2.14.2 Indoor unit ...................................................................................................................................................... 126
2.15 Reactor ............................................................................................................................................................................ 132
2.15.1 Checking procedures...................................................................................................................................... 132
2.15.2 Repair procedures .......................................................................................................................................... 136
2.16 Streamer unit .................................................................................................................................................................. 137
2.16.1 Checking procedures...................................................................................................................................... 137
2.16.2 Repair procedures .......................................................................................................................................... 137
2.17 Swing flap motor............................................................................................................................................................. 138
2.17.1 Main swing flap motor ................................................................................................................................... 138
2.17.2 Secondary swing flap motor........................................................................................................................... 140
2.18 Swing raster motor ......................................................................................................................................................... 143
2.18.1 Checking procedures...................................................................................................................................... 143
2.18.2 Repair procedures .......................................................................................................................................... 144
2.19 Thermistors ..................................................................................................................................................................... 144
2.19.1 Refrigerant side thermistors .......................................................................................................................... 144
2.19.2 Other thermistors........................................................................................................................................... 151
2.20 Wifi control PCB .............................................................................................................................................................. 153
2.20.1 Checking procedures...................................................................................................................................... 153
2.20.2 Repair procedures .......................................................................................................................................... 154
3 Third party components 156
3.1 Electrical circuit............................................................................................................................................................... 156
3.1.1 Checking procedures...................................................................................................................................... 156
3.1.2 Repair procedures .......................................................................................................................................... 157
3.2 Refrigerant circuit ........................................................................................................................................................... 158
3.2.1 Checking procedures...................................................................................................................................... 158
3.2.2 Repair procedures .......................................................................................................................................... 162
3.3 External factors ............................................................................................................................................................... 165
3.3.1 Checking procedures...................................................................................................................................... 165
4 Maintenance 167
4.1 To clean the outdoor unit heat exchanger..................................................................................................................... 167
4.2 To clean the indoor unit heat exchanger ....................................................................................................................... 167
4.3 To clean the indoor unit heat exchanger in extreme condition .................................................................................... 167
4.4 To clean the air filters ..................................................................................................................................................... 168
5 Technical data 170
5.1 Detailed information setting mode ................................................................................................................................ 170