MAHLE RTI TC640 - Manual (Page 16)

RTI Technologies, Inc.
September 15, 1997 Page 15
PROBLEM: I turned a cylinder of new refrigerant up-side-down to pre-
charge the Charging Cylinder with liquid. The Charging Cylinder
didn't fill and now the TC640 won't recover from an A/C system.
SOLUTION: The TC640 has been overloaded with liquid refrigerant (See
Safety Precaution Section at the beginning of this manual).
... WARNING ...
IF A CYLINDER IS TURNED UP-SIDE-DOWN, THE
TC640 WILL OVERFILL WITH LIQUID REFRIGERANT.
THIS OVER FILLS THE SUCTION ACCUMULATOR
WITH LIQUID.
FROST ON THE OIL DRAIN ON THE BOTTOM OF THE
LONG COMBO FILTER ON THE REAR OF THE TC640
IS AN INDICATION OF THIS OCCURRENCE.
THIS SYMPTOM IS CAUSE FOR CONCERN AS LIQUID
REFRIGERANT WILL BE FORCED INTO THE
COMPRESSOR.
THIS CAN DESTROY THE COMPRESSOR AND WILL
VOID THE WARRANTY.
The safest method to remove the excess liquid which has
collected in the Suction Accumulator is to drain it from the Oil
Drain on the back of the TC640 as follows:
Draw a vacuum (50 to 100mbar) on an empty cylinder with a
standard vacuum pump and connect it to the Oil Drain Valve. Open
the cylinder valve and the Oil Drain valve.
Close the valves and disconnect the cylinder after the liquid has
been drawn into the cylinder. This refrigerant can now be
recycled by the TC640 following normal recycling procedures.