Chery automobile Service Manual page 524

200 g or more refrigerants shall be charged
every time, and turn the compressor
several times by hand after the completion
of charging.
(5) Turn off the high-pressure manual valve 4,
shown in the figure below, and turn on the
low-pressure manual valve 3 to let the
refrigerant in gas-state charge into the
refrigeration system.
charged from the low-pressure manual
valve must be gas-state. If it is liquid state,
the liquid hammer phenomenon may
appear to damage the compressor. Turn off
the low-pressure manual valve when the
reading of low-pressure gauge reaches
5
2.8X10 Pa.
Refrigerant Refilling
Regulated amount:R134a 850±25g
4. Leak Check of Refrigeration System
Three effective methods can be used to check
the air tightness of refrigeration system: check
with electronic leak detector, soap solution and
halogen leak detector.
1) Check with Electronic Leak Detector
As shown in the figure, connect the power
supply connector 2 of electronic leak detector
1 to the power supply, and move probe 3
slowly (30 mm/s), which should be placed 3
mm away from the check point. And if any
alarming sound is emitted, it means there is a
leak phenomenon occurred at that place.
2 Check with Soap Solution
Apply the soap solution to the possible leak
position. Observe whether air bubbles appear.
If there are air bubbles, it indicates a leaking
accident occurs.
3 Check with Halogen Leak Detector
The inspection procedure is described below:
(1) Check the liquid propane capacity in the
The refrigerant
U-9
1. Electronic leak detector.
2. Power supply connector.
3. Probe
If the leakage occurs at the joints
of refrigeration pipes, the relevant
O-rings shall be replaced.