Indoor unit main PCB ...................................................................................................................................................... 53

4.5.1

Checking procedures ...................................................................................................................................... 53

4.5.2

Repair procedures .......................................................................................................................................... 58

4.6

Plate work ....................................................................................................................................................................... 60

4.6.1

To remove the front panel ............................................................................................................................. 60

4.6.2

To remove the front grille .............................................................................................................................. 61

4.6.3

To remove the electrical wiring box cover..................................................................................................... 62

4.6.4

To remove the switch box .............................................................................................................................. 63

4.6.5

To install the switch box................................................................................................................................. 64

4.6.6

To re-install the front grille ............................................................................................................................ 66

4.6.7

To re-install the front panel ........................................................................................................................... 66

4.7

Remote controller user interface ................................................................................................................................... 66

4.7.1

Checking procedures ...................................................................................................................................... 66

4.7.2

Repair procedures .......................................................................................................................................... 68

4.8

Swing flap motor............................................................................................................................................................. 69

4.8.1

Main swing flap motor ................................................................................................................................... 69

4.8.2

Secondary swing flap motor........................................................................................................................... 73

4.9

Thermistors ..................................................................................................................................................................... 77

4.9.1

Checking procedures ...................................................................................................................................... 77

4.9.2

Repair procedures .......................................................................................................................................... 80

5 Third party components

5.1

Electrical circuit............................................................................................................................................................... 83

5.1.1

Checking procedures ...................................................................................................................................... 83

5.1.2

Repair procedures .......................................................................................................................................... 86

5.2

Refrigerant circuit ........................................................................................................................................................... 87

5.3

Manufacturer components ............................................................................................................................................ 87

5.3.1

Checking procedures ...................................................................................................................................... 87

5.3.2

Repair procedures .......................................................................................................................................... 87

5.4

External factors ............................................................................................................................................................... 88

5.4.1

Checking procedures ...................................................................................................................................... 88

6 Maintenance

6.1

To clean the indoor unit heat exchanger ....................................................................................................................... 89

6.2

To clean the indoor unit heat exchanger in extreme condition .................................................................................... 89

6.3

To clean the air outlet and exterior................................................................................................................................ 90

6.4

To clean the front panel ................................................................................................................................................. 90

6.5

To clean the air filters ..................................................................................................................................................... 91

7 Technical data

7.1

Detailed information setting mode ................................................................................................................................ 92

7.1.1

Detailed information setting mode: Indoor unit ........................................................................................... 92

7.1.2

Detailed information setting mode: Remote controller................................................................................ 92

7.2

Wiring diagram................................................................................................................................................................ 93

7.2.1

Wiring diagram: Indoor unit........................................................................................................................... 93

7.3

Piping diagram ................................................................................................................................................................ 97

7.3.1

Piping diagram: Indoor unit............................................................................................................................ 97

7.4

Component overview...................................................................................................................................................... 98

7.4.1

Component overview: Indoor unit................................................................................................................. 98

7.5

Field information report ................................................................................................................................................. 100

7.6

Service tools .................................................................................................................................................................... 103

7.7

Field settings ................................................................................................................................................................... 104

7.7.1

To retrieve the field settings .......................................................................................................................... 104

7.7.2

Overview of field settings for indoor units .................................................................................................... 112

Table of Contents

Service manual

Table of Contents