Sullair 20/12 Series Operator's Manual

Section 6
MAINTENANCE
31
TROUBLESHOOTING (Continued)
SYMPTOM PROBABLE CAUSE REMEDY
COMPRESSOR WILL NOT BUILD
UP FULL DISCHARGE PRESSURE Air Demand is Too Great Check service lines for leaks or open valves.
Dirty Air Filter Check the filter indicator and change or clean
element if required.
Pilot Pressure Regulator Out
of Adjustment Adjust regulator according to control
adjustment instructions in the Maintenance
section.
Defective Pilot Pressure Regulator Check diaphragm and replace if necessary
(kit available).
Defective Minimum Pressure Valve Check that the piston is moving freely.
Inlet Valve Not Opening Completely Check and readjust control linkage.
Broken spring in Sullicon Control. Replace
spring.
Inlet cylinder not extended.
Defective Closed Inlet Solenoid
Valve Repair or replace.
COMPRESSOR WILL NOT BUILD Defective Closed Inlet Solenoid
UP FULL DISCHARGE PRESSURE Valve Timer Replace.
(Cont’d.)
LINE PRESSURE RISES ABOVE
CUT-OUT PRESSURE SETTING
ON PRESSURE SWITCH Leak in Control System Causing
Loss of Pressure Signals Check for leaks.
Defective Pressure Switch Check that diaphragm and contacts are
functioning properly and are not damaged.
Repair or replace if necessary (kit available).
Defective Solenoid Valve Check that Sullicon Control lever is moved to
a completely stroked position when the pres-
sure switch contacts close. Repair or replace
if necessary (kit available).
Defective Blowdown Valve Check that sump pressure is exhausted to
the atmosphere when the pressure switch
contacts close or repair or replace if
necessary (kit available).
High Pressure Shutdown is
Defective or Adjustment is
Incorrect Readjust or replace.
EXCESSIVE COMPRESSOR
LUBRICANT CONSUMPTION Clogged Return Line Strainer Clean strainer (screen and o-ring replace-
or Orifice ment kit available).
Clean orifice.
Separator Element Damaged or
Not Functioning Properly Change separator element.
Leak in the Lubrication System Check all pipes, connections and compo-
nents.
Excessive Fluid Forming Drain fluid and change.
Fluid Level Too High Drain excess fluid.
PRESSURE RELIEF VALVE
OPENS REPEATEDLY High Pressure Shutdown Switch is
Defective or Out of Adjustment Readjust below pressure relief valve setting
or replace.
Defective Pressure Relief Valve Replace pressure relief valve.
Defective Pressure Gauge Replace.
Defective Minimum Pressure Valve Repair or replace.
High Separator Differential Replace separator.

Sullair 20/12 Series Specifications

General

Brand	Sullair
Model	20/12 Series
Category	Air Compressor
Language	English