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HVAC
TABLE OF CONTENTS
1 GENERAL INFORMATION ........................................................................................................................ 1
1.1. SPECIFICATIONS ................................................................................................................................. 1
1.2. TIGHTENING TORQUES ...................................................................................................................... 3
1.3. PRECAUTIONS ................................................................................................................................... 11
1.4. HVAC SYSTEM LAYOUT & WORKING.............................................................................................. 13
1.5. COMPONENTS OF HVAC .................................................................................................................. 17
1.5.1. CONTROL PANEL.................................................................................................................... 17
1.5.2. HVAC UNIT ............................................................................................................................... 20
1.5.3. COMPRESSOR ........................................................................................................................ 23
1.5.4. CONDENSOR & RECEIVER DRIER........................................................................................ 24
1.5.5. THERMISTOR / THERMO SENSOR ....................................................................................... 25
1.5.6. TRINARY PRESSURE SWITCH/ SENSOR ............................................................................. 28
1.5.7. AIR INLET ACTUATOR ............................................................................................................ 29
1.6. TROUBLESHOOTING......................................................................................................................... 30
2 MAINTAINANCE....................................................................................................................................... 44
2.1. PRELIMINARY INSPECTION.............................................................................................................. 44
2.2. REGULAR MAINTENANCE ................................................................................................................ 46
3 ON VEHICLE REPAIR .............................................................................................................................. 51
3.1. CONTROL PANEL ASSEMBLY .......................................................................................................... 51
3.2. COMPRESSOR ................................................................................................................................... 56
3.3. BLOWER.............................................................................................................................................. 56
3.4. BLOWER RESISTER .......................................................................................................................... 57
3.5. FILTER................................................................................................................................................. 57
3.6. TXV ...................................................................................................................................................... 58
3.7. PRESSURE SENSOR / SWITCH........................................................................................................ 58
3.8. HVAC UNIT.......................................................................................................................................... 59
3.9. CONDENSOR SEALING DUCT .......................................................................................................... 60
3.10. CONDENSOR.................................................................................................................................... 60
3.11. REFRIGERANT HOSES.................................................................................................................... 62
3.12. DO's & DON’T's ................................................................................................................................. 64
4. OVERHAULING HVAC UNIT ................................................................................................................... 65