Sullair LS20T 1100 CFM, Operator'S Manual And Parts List

Page: 43 / 146

Section 8
TROUBLESHOOTING
37
8.2 TROUBLESHOOTING GUIDE (CONTINUED)
SYMPTOM PROBABLE CAUSE REMEDY
LINE PRESSURE
RISES ABOVE P2
PRESSURE (CONT.) Defective Blowdown Solenoid
Valve Repair or replace if necessary (kit available).
Defective Blowdown Valve Check that sump pressure is exhausted to the atmos-
phere when the unload pressure setting on Supervisor
Controller is met, or repair or replace if necessary (kit
available).
EXCESSIVE COM-
PRESSOR LUBRI-
CANT CONSUMP-
TION Clogged Return Line or Orifice Clean strainer (screen and o-ring replace-ment kit avail-
able).
Clean orifice.
Separator Elements Damaged or
Not Functioning Properly Change separator elements.
Leak in the Lubrication System Check all pipes, connections and components.
Excessive Fluid Foaming Drain fluid and change.
Fluid Level Too High Drain excess fluid.
Line Pressure Too Low Over
Extended Period Increase pressure.
SUMP PRESSURE
RELIEF VALVE
OPENS REPEATED-
LY High Pressure Shutdown
Parameter is Out of Adjustment Readjust below pressure relief valve setting.
Defective Pressure Relief Valve Replace pressure relief valve.
Defective Pressure Transducer Recalibrate or replace.
Defective Minimum Pressure
Valve Repair or replace.
High Separator Differential (dP1) Replace separator elements.
Defective Blowdown Valve Repair or replace (kit available).
Defective Blowdown Solenoid
Valve Repair or replace (kit available).
Plugged or Frozen Control Lines Replace or thaw as needed.
INTERSTAGE
PRESSURE RELIEF
VALVE OPENS
REPEATEDLY Defective Discharge Check Valve Repair or replace (kit available).
Defective Oil Stop Valve Repair or replace (kit available).
Defective Pressure Relief Valve Replace pressure relief valve.