R 1234yf service units are subject to special safety regulations, because the “new” refrigerant must not escape into the atmosphere. To avoid confusion, the units should be clearly recognisable. What do I have to do if the analysis fails?Ī/C workshops are most likely to have at least two different service units in the future, because R 134a and R 1234yf must not be mixed. For balancing the unit with the atmospheric pressure, the service couplers have to be unscrewed and removed from the hoses, so that you can look into the hoses. To calibrate the sensor use the arrow keys to go to “Other menus” > press ENTER > then go down right to the bottom to “Service” > press ENTER > key in Code 2224, and follow the instructions on the display.
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