Daikin FTXA20A Service Manual page 5

Split stylish r32

Table of Contents

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

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

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

5.1

Detailed information setting mode ................................................................................................................................ 170

Table of contents

156

167

170

Service manual

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