Leak Testing the System

INSPECT FOR LEAKAGE OF REFRIGERANT

a. Perform in these conditions:
^ Slop engine.
^ Secure good ventilation (If not, the gas leak detector may react to volatile gases which are not refrigerant, such as evaporated gasoline and exhaust gas.)
^ Repeat the test 2 or 3 times.
^ Make sure that there is some refrigerant remaining in the refrigeration system.
When compressor is OFF: approximately 392-588 KPa (4 - 6 kgf/sq. cm, 57 - 35 psi)




b. Bring the gas leak detector close to the drain hose before performing the test.

HINT:
^ After the blower motor is stopped, leave the cooling unit for more than 15 minutes.
^ Expose the gas leak detector sensor the under the drain hose.
^ When bring the gas leak detector close to the drain hose, make sure that the gas leak detector does not react to the volatile gases.

If such reaction is unavoidable, the vehicle must be lifted up.




c. If gas leak is not detected on the drain hose, remove the power transistor from the cooling unit. Then insert the gas leak detector sensor into the unit and perform the test.




d. Disconnect the connector and leave the pressure switch for approximately 20 minutes. Then bring the gas leak detector close to the pressure switch and perform the test.
e .Bring the gas leak detector close to the refrigerant lines and perform the test.

HINT: Make sure that there is no dirt on joints