A/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. To avoid confusion, the units should be clearly recognisable.
R 1234yf service units are subject to special safety regulations, because the “new” refrigerant must not escape into the atmosphere.
Therefore, a suitable R 1234yf service station should perform a fully automatic self test prior to every start-up to check if the unit is tight and trace potential leaks. Service couplers should also be different from those used for R 134a units to avoid the risk of confusion when connecting the service equipment. R 1234yf service couplers should have what is called a “ventilated clearance” to ensure that no refrigerant escapes from the air conditioner even when you have a defective Schrader valve. Last but not least, the use of refrigerant analysis tools is mandatory. The analysis tool checks the purity of the refrigerant to prevent dangerous cross contamination. Ideally, it is already integrated in the service station.
Combo service units suitable for both refrigerants are more complex and therefore more expensive. This is because two separate refrigerant circuits need to be integrated into a single unit. If one of the circuits fails, the complete service unit is useless.
Costly downtimes are the result. You can only do one service job at a time, while the unit’s second function remains unused. Apart from that many workshops already have at least one service unit for R 134a.
The ASC fills refrigerant by pressure difference. It is therefore technically impossible to charge 500 g of refrigerant into an A/C system if the service unit contains only 500 g of refrigerant.
The more refrigerant is contained in the internal tank the faster and easier the charging process will go. We recommend a minimum quantity of 5 kg to be contained in the unit.
During the operator training our technician will, among other things, make you familiar with the following issues:
According to the risk analysis of the German TÜV the service unit may only be used for charging A/C systems that have no leaks. To meet this requirement the A/C system is first put under vacuum (negative pressure) and checked for pressure changes for a certain period of time. Then a little amount of refrigerant is added to generate positive pressure, and the system is again monitored at a constant pressure level. If the pressure rises or falls in either of the two phases you will know that the A/C system leaks. In that case the service unit will interrupt the process and display an error message.
To guarantee accurate charging at all times it is then necessary to recover the pre-charged amount of refrigerant and completely evacuate the A/C system before. Once this has been done you can go ahead and charge the required amount of refrigerant
Our A/C service units are supplied without refrigerant. Error Code 12 means that there is too little pressure (i.e. refrigerant) in the unit to perform the daily leak check and the subsequent software test. Please fill up the internal tank with refrigerant. To do this connect a bottle of fresh refrigerant (shake before use), select “Other menus” using the arrow keys and confirm with ENTER, then select “Int. bottle filling”, press the ENTER button and key in the desired quantity of refrigerant.
Note: The ASC 5500 G RPA fills refrigerant by pressure difference. It is therefore technically impossible to charge 500 g of refrigerant into an A/C system if the service unit contains only 500 g of refrigerant. The more refrigerant is contained in the internal tank the faster and easier the charging process will go. We recommend a minimum quantity of 5 kg to be contained in the unit.
Are you interested in our products?