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HVAC
CONTENTS
1.
TECHNICAL SPECIFICATIONS............................................................................................................. 1
2.
TIGHTENING TORQUES........................................................................................................................ 3
3.
PRECAUTIONS....................................................................................................................................... 8
4.
HVAC SYSTEM LAYOUT & WORKING ................................................................................................ 9
5.
COMPONENTS OF HVAC.................................................................................................................... 12
A. CONTROL PANEL ........................................................................................................................... 12
B. HVAC UNIT ...................................................................................................................................... 14
C. COMPRESSOR ............................................................................................................................... 16
D. CONDENSOR & RECEIVER DRIER............................................................................................... 17
E. ON VEHICLE INSPECTION ............................................................................................................ 17
F. TRINARY PRESSURE SWITCH/ SENSOR .................................................................................... 18
G. AIR INLET ACTUATOR................................................................................................................... 19
6.
TROUBLESHOOTING .......................................................................................................................... 20
7.
MAINTAINANCE ................................................................................................................................... 34
A. PRELIMINARY INSPECTION.......................................................................................................... 34
B. REGULAR MAINTENANCE............................................................................................................. 36
8.
ON VEHICLE REPAIR .......................................................................................................................... 41
i. CONTROL PANEL ASSEMBLY ........................................................................................................ 41
ii. COMPRESSOR REMOVAL AND ASSEMBLY ................................................................................ 46
iii. BLOWER REMOVAL AND ASSEMBLY .......................................................................................... 46
iv. LPM REMOVAL AND ASSEMBLY .................................................................................................. 47
v. AIR FILTER REMOVAL AND ASSEMBLY....................................................................................... 47
vi. TXV .................................................................................................................................................. 50
vii. PRESSURE SENSOR / SWITCH................................................................................................... 50
viii. HVAC UNIT .................................................................................................................................... 51
ix. CONDENSOR SEALING DUCT ...................................................................................................... 51
ix. CONDENSOR.................................................................................................................................. 52
9.
REFRIGERANT HOSES / PIPES ......................................................................................................... 53
10. DO'S & DON'TS .................................................................................................................................... 54