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Compressor
Oil-equation pipe
Compressor
Color check of oil in the defective compressor
• Lay the defective compressor down, extract a little oil from the
oil-equalization pipe and then check the oil colour based on the
oil colour sample.
• Determine the number of compressors to replace based on
the oil colour:
• ASTM below 4: Replace the defective compressor
• ASTM above 4: Replace both compressors
When replacing only the defective compressor
Adjustment of oil amount in the service compressor (Oil amount 1900cc at shipment)
• Adjust the oil amount in the service compressor based on the amount of oil found in the defective compressor
by following instructions below.
1. If the amount of oil in the defective compressor is 0 < A < 1000
1) Adjust the amount of oil in the service compressor to 1000 cc.
Lay the service compressor down, and extract 900 cc of oil from the oil-equalization pipe.
Note) Do not extract more than 900 cc as a compressor fault may be caused.
• If the amount of oil in the defective compressor is below 500 cc, a fault in the oil-equalization circuit is
possible.
Check the compressor using “15-3. Procedure to Identify the Cause of Compressor Oil Shortage”.
2. If the amount of oil in the defective compressor is 1000 < A < 1900
1) Adjust the amount of oil in the service compressor to A cc.
Lay the service compressor down and extract (1900 - A) cc of oil from the oil-equalization pipe.
3. If the amount of oil in the defective compressor is 1900 < A
1) Adjust the amount of oil in the service compressor to A cc.
Insert a hose into the discharge pipe or oil equation pipe of the service compressor and then add (A -
1900) cc of oil using a funnel.