SAFARI

33 AIRCONDITIONING 4. Start engine. 5. Turn on A/C switch. Check that A/C operates at each position of the blower switch. If the blower does not operate, check the circuit breaker. 6 Check magnetic clutch operation. If the magnetic clutch does not engage, check the A/C fuse. 7 Check that idle increases. When the magnetic clutch engages, engine speed should increase. 8 Check that condenser fan motor rotates. 9 If there is no cooling or it is insufficient, inspect for leakage. If the piping connections are soiled with oil, it indicates leakage of refrigerant. Inspect by the gas leak detector and retighten any loose connectors. Important Retightening of pipe connections must be done using two wrenches to avoid twisting of the tubing. 10 Check the Amount of Refrigerant. a. Operate the air conditioner under the conditions shown in the table on RHS. Note: When the ambient temperature ismore than 40 0 C (113’F) and the pressure on the high pressure gauge becomes 1.86 MPa (19 kg/ cm 2 G) or more with the conditions in table, run the engine at the idling speed to cool down the condenser. If the high pressure gauge of manifold gauge still indicates too high, perform this test in a cool place, open all doors and set the blower speed to LO. CHECK OIL LEAK fig. 46 LOOSENING OVER TORQUING WRONG fig . 47 Item Condition Doors Completely open Temperature setting Maximum cooling Model Face Blower sped Hl Recirculation / fresh air change Recir.air HFC 134a CFC 12 Engine speed 1500 rpm 2000rpm A/C ON Conditions for checking