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Intercooler pressure below normal Choked air filter elements. Remove and inspect air filter elements.
Clean or replace elements, if necessary.
Intercooler relief valve(s) leaking. Remove valve(s), clean and inspect.
Electric blow-off valve malfunctioning. Check interstage pressure. Check functioning of loading
solenoid valve. Replace diaphragm of blow-off valve if
necessary.
Air leak between LP and MP compressor element. Inspect pipe connections and intercooler.
Replace leaking O-rings, gaskets or intercooler, if necessary.
LP compressor element not in order. Have LP compressor element inspected by Atlas Copco.
Intercooler clogged internally. Consult Atlas Copco.
Intercooler pressure above normal Aftercooler clogged internally. Consult Atlas Copco.
MP compressor element not in order. Have MP compressor element inspected by Atlas Copco.
MP silencer and/or check valve give restriction. Check and take corrective action.
Symptom Possible cause Corrective action
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