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1904 0504 83
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Oil cooler clogged Clean cooler
Thermostatic valve malfunctioning Have valve tested. Replace if
necessary.
Air cooler clogged Clean cooler
Compressor element out of order Consult Atlas Copco Customer
Centre
Excessive oil consumption; oil Incorrect oil causing foam Change to correct oil
carry-over through discharge line
Oil level too high Check for overfilling. Release
pressure and drain oil to correct
level.
Oil separator defective Replace oil separator element
Malfunctioning of the scavenge line
Replace non-return valve in the
scavenge line
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For all references hereafter, consult section Air dryer.
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Pressure dew point too high Air inlet temperature too high Check and correct; if necessary, clean the
aftercooler of the compressor
Ambient temperature too high Check and correct; if necessary, draw
cooling air via a duct from a cooler place or
relocate the compressor
Shortage of refrigerant
Have circuit checked for leaks and recharged
Refrigerant compressor does See below
not run
Evaporator pressure too high See below
Condenser pressure too high See below
Condenser pressure too high Fan control switch out of order Replace
or too low
Fan blades or fan motor out of Have checked fan/fan motor, if necessary
order replace.
Ambient temperature too high Check and correct; if necessary, draw
cooling air via a duct from a cooler place or
relocate the compressor
Condenser externally clogged Clean condenser
Compressor stops or does not Electric power supply to Check and correct as necessary
start compressor is interrupted
Thermal protection of Motor will restart when motor windings have
refrigerant compressor motor cooled down
has tripped
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