National Instructional Media Institute (NIMI)

Repairing of Auto Air Conditioning System : For Modular Employable Skills - Chennai National Instructional Media Institute (NIMI) 2010,c2009 - 105

Contents :
1.Practical
-Identify various components of Air Conditioning system
-Identify Various Electrical Equipments -Junction Box,Switchines
-Measure Voltage ,Resistance 7 Continuity in Different lines for air conditioning system
-Check of Circuit Breakers and Relays
-Check the sensors and Actuators Using Engine Scanner
and DMM
-Remove Compressor from Vehicle ,Dismantle ,check ,Rectify the Defect ,Assemble and Refit to the Vehicle
-Remove Evaporator and Heater Cores from Vehicle ,Dismantle ,check ,Rectify the Defect Assemble and Refit to the Vehicle
-Check the Condenser on the Vehicle and Rectify the defect
-Check the Drive System and Adjust if Required & Test System for Leaks
-Evacuate/Drain the system & Charge the system
-Identify Faults and Rectify Faults in Climate Control system

-2.Theory
-Fundamentals of Air conditioning
-Ohm's Law - Current ,Potential Difference ,Resistance ,Use of Multi meter, Brief on Magnetism Semi Conductor and Application ,Description of Wiring
-Description /Working Principles ,Types ,Uses ,Location and checking of Switces ,Circuit ,Protectors ,Relay ,Solenoids ,Resistors ,Diodes and Heater Control Module
-Working Principle of Sensors
-Description and Operation of Main Functional Parts -Compressor Condenser ,Evaparotr and Expansion Device
-Evaparator
-Expansion Device
-Condensers
-Procedure for Draining the system ,Finding the leak and charging the system
-Procedure of Dismantle ,Checking ,Assembling ,Different Components of the system
-Procedure for Fault FInding & Rectification in Car Air -Conditioning system
-Defferanece Betwwn Manual and Automatic A/c Systems ,Air -Distribution of Air -Conditioning system and Different Types of Actuation of Distribution Doors

3.Assignment & Test


MES16

National Instructional Media Institute (NIMI)


Automotive Repair : Modular Employable Skills
Auto A.C.

629.2772 / REP