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HVAC
TABLE OF CONTENTS
10.1 GENERAL INFORMATION................................................................................................................ 1
10.1.1. SPECIFICATIONS....................................................................................................................... 1
10.1.2. TIGHTENING TORQUES ............................................................................................................ 3
10.1.3. PRECAUTIONS......................................................................................................................... 11
10.1.4. HVAC SYSTEM LAYOUT & WORKING..................................................................................... 13
10.1.5. COMPONENTS OF HVAC......................................................................................................... 15
10.1.5.1. CONTROL PANEL .......................................................................................................... 15
10.1.5.2. HVAC UNIT..................................................................................................................... 18
10.1.5.3. COMPRESSOR .............................................................................................................. 21
10.1.5.4. CONDENSOR & RECEIVER DRIER ............................................................................... 22
10.1.5.5. THERMISTOR / THERMO SENSOR............................................................................... 23
10.1.5.6. TRINARY PRESSURE SWITCH/ SENSOR..................................................................... 25
10.1.5.7. AIR INLET ACTUATOR................................................................................................... 26
10.1.6. TROUBLESHOOTING............................................................................................................... 27
10.2 MAINTAINANCE.............................................................................................................................. 41
10.2.1. PRELIMINARY INSPECTION .................................................................................................... 41
10.2.2. REGULAR MAINTENANCE....................................................................................................... 43
10.2 ON VEHICLE REPAIR ..................................................................................................................... 47
10.3.1. CONTROL PANEL ASSEMBLY................................................................................................. 47
10.3.2. COMPRESSOR......................................................................................................................... 52
10.3.3. BLOWER................................................................................................................................... 52
10.3.4. BLOWER RESISTER................................................................................................................. 53
10.3.5. FILTER...................................................................................................................................... 53
10.3.6. TXV ........................................................................................................................................... 54
10.3.7. PRESSURE SENSOR / SWITCH............................................................................................... 54
10.3.8. HVAC UNIT ............................................................................................................................... 55
10.3.9. CONDENSOR SEALING DUCT................................................................................................. 55
10.3.10. CONDENSOR ......................................................................................................................... 56
10.3.11. REFRIGERANT HOSES.......................................................................................................... 57
10.3.12. DO's & DON’T's ....................................................................................................................... 59
10.2 OVERHAULING HVAC UNIT ........................................................................................................... 60