General Information For Finding Leaks On The Refrigerant Circuit

All approved procedures for finding leaks for this refrigerant by the manufacturers will be described in this service information.

• Leaking refrigerant circuits must not be filled with refrigerant.
• The methods for detecting leaks must be chosen on a case by case basis. Depending on the size of the leak, certain methods must be used, to detect the leak.
• Smaller leaks may be found with the following methods, for example. Refer to LEAKS, FINDING USING ELECTRONIC LEAK DETECTOR , LEAKS, FINDING WITH UV LEAK DETECTION SYSTEM  or LEAKS, FINDING USING FORMING GAS .
• Most of the times, small leaks at the refrigerant circuit cannot be found using a vacuum or pressure test. The incoming air and the amount of test gas flowing out is too small to be able to locate the faulty location based on noise.
• Depending on the ambient conditions, larger leaks at the refrigerant circuit may be located by, for example, noises which occur at the faulty location during the vacuum or pressure test. Refer to LEAKS, FINDING USING VACUUM TEST  or LEAKS, FINDING USING NITROGEN PRESSURE TEST .
• Leaks on the refrigerant circuit that are greater than 100 g of refrigerant loss each year are not always clearly detectable with the vacuum test or with the pressure test, depending on the ambient conditions (ambient noise, leak location etc.). The incoming air and/or the amount of nitrogen flowing out may be too small to generate any noise that would indicate a faulty location. Refer to LEAKS, FINDING USING FORMING GAS .