CHANGHE FREEDOM SERVICE MANUAL HEATER AND AIR CONDITIONING
PERFORMANCE TEST
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 2000rpm.
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 another dry bulb thermometer close to
inlet of cooling unit.
6）The high pressure gauge reading should be within specified pressure range.
High pressure
Gauge reading：1.37-1.67Mpa （14-17kg/cm2, 200-243psi）
After air conditioning system has a stabilized condition,
measure dry bulb temperature at the inlet and cool air outlet. If
their crossing point falls within the area between two lines
(see figure), cooling performance then is satisfactory and
proper.
Temperature of inlet of cooling unit
Temperature of cool air outlet
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