Sullair 20/12 Series Operator's Manual And Parts List page 37

TROUBLESHOOTING (CONTINUED)
SYMPTOM
LINE PRESSURE RISES ABOVE
CUT- -OUT PRESSURE SETTING
ON PRESSURE SWITCH (cont.)
EXCESSIVE COMPRESSOR
LUBRICANT CONSUMPTION
PRESSURE RELIEF VALVE
OPENS REPEATEDLY
PRESSURE RELIEF VALVE
OPENS REPEATEDLY (cont'd.)
PROBABLE CAUSE
Defective Blowdown Valve
High Pressure Shutdown is
Defective or Adjustment is
Incorrect
Clogged Return Line or Orifice
Separator Element Damaged or
Not Functioning Properly
Leak in the Lubrication System
High Pressure Shutdown Switch is
Defective or Out of Adjustment
Defective Pressure Relief Valve
Defective Pressure Gauge
Defective Minimum Pressure Valve
High Separator Differential
Defective Blowdown Valve
Defective Muffler
Defective Pressure Switch
Defective Pilot Valve
Defective Sullicon Diaphragm
Incorrect Unload Stop Screw
Position
Incorrect Inlet Butterfly Position
Inlet Butterfly Loose
Plugged Frozen Control Lines
Defective Shaft Seal
Section 6
MAINTENANCE
REMEDY
Check that sump pressure is exhausted to
the atmosphere when the pressure switch
contacts close or repair or replace if
necessary (kit available).
Readjust or replace.
Clean strainer (screen and o- -ring replace- -
ment kit available).
Clean orifice.
Change separator.
Check all pipes, connections and compo- -
nents.
Readjust below pressure relief valve setting
or replace.
Replace pressure relief valve.
Replace.
Repair or replace.
Replace separator.
Repair or replace.
Replace.
Repair or replace.
Repair or replace.
Replace diaphragm.
Reposition and tighten.
Reposition and tighten.
Reposition and tighten.
Replace or thaw as needed.
Replace shaft seal.
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