Sullair ES-6 SERIES User Manual page 51

ES-6 USER MANUAL
6.8 TROUBLESHOOTING GUIDE
SYMPTOM
COMPRESSOR SHUTS
DOWN WITH AIR DEMAND
PRESENT (CONTINUED)
COMPRESSOR WILL NOT
BUILD UP FULL DIS-
CHARGE PRESSURE
LI NE PRESSURE RISES
ABOVE CUT-OUT PRES-
SURE SETTING ON PRES-
SURE SWITCH
EXCESSIVE COMPRESSOR
FLUID CONSUMPTION
PRESSURE RELIEF VALVE
OPENS REPEATEDLY
LIQUID WATER IN COM-
PRESSED AIR LINES
PROBABLE CAUSE
Discharge Temperature Switch
Open (continued)
Air Demand Is Too Great
Dirty Air Filter
Pressure Regulator Out Of
Adjustment
Defective Solenoid Valve
Defective Solenoid Valve
Leak In Control System Caus-
ing Loss of Pressure Signals
Defective Pressure Switch
Inlet Valve Stuck Open
Clogged Return Line
Separator Element Damaged
Or Not Functioning Properly
Leak In The Lubrication System Check all pipes, connections and components.
Excess Fluid Foaming
Fluid Level Too High
Shaft Seal Failure
Compressor Operating Pres-
sure Too High
Defective Pressure Relief Valve Replace pressure relief valve.
Water Vapor Condensation
From Cooling and Compression
Occurs Naturally
Section 6 - MAINTENANCE
REMEDY
Defective discharge temperature switch; check for
a short or open circuit to probe and correct wiring.
Check service lines for leaks or open valves.
Check filter and change element if required.
Adjust regulator according to control adjustment
instructions in Maintenance Section.
A normally open solenoid must energize to load
compressor; check for proper operation.
Repair solenoid valve (see Section 6).
Check for leaks.
Check that diaphragm and contacts are not dam-
aged. Replace if necessary.
Inspect inlet valve and insure free operation (see
Section 6).
Remove element cover and clean orifice.
Change separator element.
Drain and change.
Drain excess.
Replace shaft seal.
See Symptom "Line Pressure Rises Above Cut-
out Pressure Setting on Pressure Switch" above.
Remove the water vapor from compressed air
prior to distribution through the air system. Check
operation of aftercooler and moisture separator.
Install a compressed air dryer sized for the flow
and dryness level required. (Note: Filters may also
be required to remove particulates, liquid oil aero-
sols or for oil vapor removal. Change cartridges as
recommended by the filter manufacturer.) Check
all drain traps routinely to insure their proper oper-
ation. Maintain them regularly.
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