Safety relief opens or pressure exceeds setpoint.
1
Pressure switch / transducer drift
CheckCompare gauge to controller reading; calibrate transducer.
FixAdjust setpoint or replace transducer.
Sign in to rate whether this fix helped.
2
Unloader / inlet valve fails closed
highCheckWatch inlet valve at cut-out — must open to unload airend.
FixRepair pilot signal, clean valve, replace solenoid.
Sign in to rate whether this fix helped.
3
Wrong relief valve set pressure
criticalCheckRelief should be ~10–15% above max working pressure, never above tank rating.
FixReplace with correct ASME-stamped valve.
SafetyNever plug or replace a safety relief with a higher setting.
Sign in to rate whether this fix helped.
4
Controller programmed incorrectly
Rotary screw
CheckVerify load/unload setpoints in HMI.
FixReprogram per OEM defaults.
Sign in to rate whether this fix helped.
Did we solve your issue?
Sign in to share what resolved it and help others.
Safety
Lockout/tagout before opening enclosures. Verify zero energy. Bleed system pressure before opening any pneumatic connection.