Quincy QSF Series Instruction Manual page 48

Section VII– Troubleshooting
PROBABLE CAUSE
Excessive Water Content in Fluid
Water drain intervals
Discharge temperature too low
Pressure Relief Valve Exhausting
Differential pressure regulator not
set correctly
Air pressure not set correctly
Air inlet valve not closing properly
in relation to air demand
Plugged separator
Faulty receiver pressure gauge
Faulty pressure relief valve
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CORRECTIVE ACTION
Drain water as needed to reduce water content in fluid below 200
PPM.
Check operation of thermostatic valve or water regulating valve. If
condition continues, consult factory service department.
Adjust differential pressure regulator to obtain desired modulation
range.
Readjust air pressure switch so that the compressor unloads at the
desired pressure.
Correct in accordance with the instruction in "Inlet valve not opening
or closing in relation to air demand" section of this troubleshooting
guide.
Replace with new air/fluid separator
Check gauge for accuracy and replace if necessary. Adjust control
settings.
Check pressure relief valve for correct pressure setting. If valve is still
leaking, replace with new relief valve.
Quincy Compressor – QSF Series