ZEST BOLT Service Manual

AIR CONDITIONING 40 11.17 FUNCTION AND INSPECTION OF A.C. COMPONENTS: Sr. NO. COMPONENT FUNCTION INSPECTION 1. Fresh / Recirculation actuator motor Actuates the fresh / recirculation flap as per the user choice. Remove the extreme left hand side grill cover and by pressing the fresh/recirculation switch, see the closing / opening of the flap. If it is not working, no current should flow between the terminals when the flap is at either of the ends. 2. Blower Resistor It operates the blower at various speeds. If the blower is not working at speed no 1, 2, and 3, and if it is working only at speed no 4, resistor has to be replaced with a new one. 3. Anti-Freeze switch It protects the A. C. system from freezing There should always be continuity, at both the terminals. If there is no continuity, switch has to be replaced 4. Linear Pressure switch Protects the A.C. system from any consequential damage. Check the continuity. The ohm meter should indicate zero reading. If, any resistance / open circuit is observed, replace the switch with new one SR. NO . COMPONENT FUNCTION INSPECTION 5. VSV (vacuum solenoid valve) Device for opening or closing the vacuum path to idle up actuator. The V.S.V. opens or closes according to the A/C circuit, engine speed rises a little higher than normal idle speed 1. Remove vacuum hoses and electrical connector from vsv 2. Check VSV for proper vacuum circuit continuity. 3. Check VSV for short circuit signal from multimeter should show open circuit between each terminal and VSV body 6. Magnetic clutch Device for running the compressor with when the air conditioner operation needed it is controlled by A/C relay and compressor relay 1. Disconnect electrical connector 2. Pulley should rotate freely with engine, supply disconnected 3. Pulley should operate compressor is with supply connected. 4. Check for noise