Figure 29. Test Bench settings for post-maintenance run of a compressor
4. Start the procedure by pressing “Valve” and/or “Clutch”.
5. During the procedure the temperature must not exceed 60°C. If the temperature is higher, the
process must be stopped to allow the unit to cool off.
6. After 10-15 minutes of compressor operation, press “Valve” and/or “Clutch”, and then “Stop” to
stop the procedure.
7. Pump the refrigerant out and dismount the compressor from the bench.
8. Drain the compressor oil. Assess its condition. If there is grit in the oil, repeat steps 1-7 to
continue the compressor running. If the oil doesn’t change and there are no signs of wear, the
procedure can be finished.
9. If, after the 4th cycle of the procedure, the oil drained from the compressor still has the signs
of wear, the further running of the compressor is useless and it must be considered faulty.
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4. COMPRESSOR PRE-SALE CHECK
A pre-sale check of a compressor can be performed when it is necessary to assess its technical
condition and quality.
Run the procedure as follows:
1. Drain the factory oil from the compressor to a clean container.
Operation manual - test bench MS111
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