DISCHARGING, EVACUATING, CHARGING AND CHECKING — Checking Refrigerant Leaks

To use the device properly, read the manufacturer's manuals. Also perform the specified maintenance and inspections.

Place the probe on connection fitting and wait for 5 seconds or more. To check cooling unit, wait for 10 seconds or more. Keep the probe as still as possible for one more minute. When testing single-bolt flange, place the probe on the opposite side of the fitting.

If any leak is noted with a detector having a nominal sensitivity of 15 to 25 g (0.53 to 0.88 oz)/year, that leak must be repaired. The nominal sensitivity of the detector is determined under the assumption that all the leaking gas is collected by the detector. Accordingly, the quantity of gas actually leaking can amount to five to ten times the indicated value. Generally speaking, leakage of 150 to 200 g (5.29 to 7.05 oz) of refrigerant can cause insufficient cooling. Oil deposited during assembling must be wiped off before inspection. Refrigerant easily dissolves in oil, and the presence of oil can cause an error in measurement. This precaution is important when checking a used car for refrigerant leakage. If oil is noted at or around connections, it indicates that refrigerant is leaking.