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