A/C System Performance Testing

After finishing all repairs, make sure to carry out performance test of air conditioning system as follows.




PROCEDURE
1. Connect high and low side charging hose of manifold gauge set to hose fittings of compressor.
2. Run engine, and keep compressor speed at 2,000 rpm.
3. Operate air conditioning, and set blower switch at "HI", temperature lever at "COOL".
4. Keep all windows and doors open.
5. Insert a dry bulb thermometer in cool air outlet, and place psychrometer (dry and wet bulb thermometer) close to inlet of cooling unit.
6. The high pressure gauge reading should be within specified pressure range.

High pressure gauge reading:
1.37-1.67 MPa
(14 - 17 kg/sq.cm, 200 - 243 psi)

NOTE: If the gauge indicates too high, pour water on condenser or if it is too low, cover front surface of condenser.

7. The dry bulb thermometer at air inlet should be within 25 to 35 °C (77 to 95 °F).

Under above conditions, operate air conditioning system until a stabilized condition on high and low pressure gauges and thermometers has been established.