Cleaning Refrigerant (R-134a)

- Bring service station into basic setting and note safety measures.
- Open valve (15) on charging cylinder slightly (1 to 11/2 turns).
- Switch on suction (2) and run cleaning procedure for at least 10 mins.
- Close valve (15) and wait until indicator light (3) lights up and the compressor is automatically switched off.

In the cleaning process the refrigerant is pumped through a drier integrated in the service station where it is dried and cleaned to remove particles of dirt. A moisture indicator (20) shows the refrigerant moisture content. the cleaning period should not exceed 10 to 15 minutes.

If the moisture indicator still shows moisture after this time, the drier is saturated and must be replaced (refer to operating instructions of the service station). the refrigerant must then be cleaned again. It the compressor is switched off during the cleaning process, the reasons for this could be as follows:

1. Insufficient/excessive pressure in intake of the compressor. This is applicable if the charging cylinder valve is opened too little or too much.
2. Pressure too high (> 17 bar) in charging cylinder. This means non-condensable gas in circuit. In this case close valve (15) and discharge the non-condensable gas via the Schrader valve on the charging cylinder or wait until refrigerant in the charging cylinder has reached ambient temperature. Afterwards switch on suction until there is no longer refrigerant in the service station and the compressor is switched off automatically.