NEXON

HVAC

CONTENTS

1.1 GENERAL INFORMATiON...................................................................................................................... 1

1.1.1. SPECIFICATIONS .............................................................................................................................. 1

1.1.2. TIGHTENING TORQUES ................................................................................................................... 3

1.1.3. PRECAUTIONS .................................................................................................................................. 9

1.1.4. HVAC SYSTEM LAYOUT & WORKING........................................................................................... 10

1.1.5. COMPONENTS OF HVAC ............................................................................................................... 13

1.1.5.1. CONTROL PANEL ................................................................................................................. 13

1.1.5.2. HVAC UNIT ............................................................................................................................ 15

1.1.5.3. COMPRESSOR ..................................................................................................................... 18

1.1.5.4. CONDENSOR & RECEIVER DRIER..................................................................................... 19

1.1.5.5. THERMISTOR / THERMO SENSOR .................................................................................... 19

1.1.5.6. TRINARY PRESSURE SWITCH/ SENSOR .......................................................................... 22

1.1.5.7. AIR INLET ACTUATOR ......................................................................................................... 23

1.1.6. TROUBLESHOOTING...................................................................................................................... 24

1.2 MAINTAINANCE.................................................................................................................................... 39

1.2.1. PRELIMINARY INSPECTION .......................................................................................................... 39

1.2.2. REGULAR MAINTENANCE ............................................................................................................. 41

1.3 ON VEHICLE REPAIR........................................................................................................................... 46

1.3.1. CONTROL PANEL ASSEMBLY ....................................................................................................... 46

1.3.2. COMPRESSOR ................................................................................................................................ 51

1.3.3. BLOWER .......................................................................................................................................... 51

1.3.4. BLOWER RESISTER ....................................................................................................................... 52

1.3.5. FILTER.............................................................................................................................................. 52

1.3.6. TXV ................................................................................................................................................... 55

1.3.7. PRESSURE SENSOR / SWITCH..................................................................................................... 55

1.3.8. HVAC UNIT....................................................................................................................................... 56

1.3.9. CONDENSOR SEALING DUCT ....................................................................................................... 56

1.3.10. CONDENSOR................................................................................................................................. 57

1.3.11. REFRIGERANT HOSES................................................................................................................. 58

1.3.12. DO's & DON’T's .............................................................................................................................. 59