Symptom Related Diagnostic Procedures

Bench-Check Procedure

1. Install test plate J-9625-A on rear head of compressor.

2. Attach center hose of manifold gage set on charging station to a refrigerant drum standing in an upright position and open valve on drum.

3. Connect charging Station high and low pressure lines to corresponding fittings on test plate J-9625-A, using J-5420 gage adapters or hoses equipped with valve depressors. Suction port (low-side) of compressor has large internal opening. Discharge port (high-side) has smaller internal opening into compressor.

4. Open low pressure control, high-pressure control and refrigerant control on charging station to allow refrigerant vapor to flow into compressor.

5. Using a leak detector, check for leaks at pressure relief valve, rear head switch location, compressor front and rear head seals, through bolt head gaskets and compressor shaft seal. After checking, shut off low pressure control and high-pressure control on charging station.

6. If an external leak is present, perform the necessary corrective measures and recheck for leaks to make certain the leak has been corrected.

7. Loosen the manifold gage hose connections to the gage adapters J-5420 connected to the low and high sides and allow the vapor pressure to release from the compressor. If valve depressor-type hoses are used, loosen hose connections at gage manifold to release vapor pressure from compressor.

8. Disconnect both gage adapters J-5420 or hoses from the test plate J-9625-A and remove test plate.