BOCK FK40 - Compressor Defects

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09665-07.2012-Gb
9 I Compressor defects
Compressor part Possible causes / Symptom Remedy
Valve plates
- Liquid shocks because of liquid refrigerant
or oil
- Overheating of compressor - Check the operating conditions
Shaft seal leaking
- Lack of oil
- Dirt in the system
- Change oil, clean the system; install a suction
line lter, if necessary
- Standstill time too long
- Moisture in the system - Dry the system trough changing refrigerant
and oil, replace the drier; install a suction line
lter, if necessary
- Too frequent starting of the compressor
- Overheating of compressor
(Heat protection thermostat switches off)
- Check the operating conditions
- Belt vibrating excessively
- Alignment of compressor and motor incorrect
Oil pump
- Lack of oil
- Dirt in the system
- Change oil, clean the system; install a suction
line lter, if necessary
- Moisture in the system - Dry the system trough changing refrigerant
and oil, replace the drier; install a suction line
lter, if necessary
- Overheating of compressor
(Heat protection thermostat switches off)
- Check the operating conditions
Bearings
- Lack of oil
- Dirt in the system
- Change oil, clean the system; install a suction
line lter, if necessary
- Moisture in the system - Dry the system trough changing refrigerant
and oil, replace the drier; install a suction line
lter, if necessary
- Overheating of compressor
(Heat protection thermostat switches off)
- Check the operating conditions
- Overloading of compressor - Compare the operating conditions with the
application limits
Pistons /
Connecting rods
- Lack of oil
- Dirt in the system
- Change oil, clean the system; install a suction
line lter, if necessary
- Moisture in the system - Dry the system trough changing refrigerant
and oil, replace the drier; install a suction line
lter, if necessary
- Overheating of compressor
(Heat protection thermostat switches off)
- Check the operating conditions
Copper plating
- Moisture in the system
- Acid formation in the system
- Dry the system trough changing refrigerant
and oil, replace the drier; install a suction line
lter, if necessary
Formation of oil-carbon
- Overheating of compressor
(Heat protection thermostat switches off)
- Check the operating conditions
Compressor defects
Compressor defects may have various causes. The table below is meant to aid you while analysing the cause of the breakdown by means of
the defective compressor parts found. Thus, the specic remedying of the cause of the breakdown is facilitated.