Sullair ES-6 Series User Manual page 76

ES-6 USER MANUAL
6.8 TROUBLESHOOTING GUIDE
COMPRESSOR WILL NOT BUILD UP
FULL DISCHARGE PRESSURE
LINE PRESSURE RISES ABOVE
CUT-OUT PRESSURE SETTING ON
PRESSURE SWITCH
EXCESSIVE COMPRESSOR FLUID
CONSUMPTION
PRESSURE RELIEF VALVE OPENS
REPEATEDLY
LIQUID WATER IN COMPRESSED
AIR LINES
76
Air Demand is Too Great
Dirty Air Filter
Pressure Regulator Out Of Adjust-
ment
Defective Solenoid Valve
Defective Solenoid Valve
Leak In Control System Causing 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
Excess Fluid Foaming
Fluid Level Too High
Shaft Seal Failure
Compressor Operating Pressure Too
High
Defective Pressure Relief Valve
Water Vapor Condensation
From Cooling and Compression
Occurs Naturally
SECTION 6
Check service lines for leaks or open
valves.
Check filter and change element if
required.
Adjust regulator according to control
adjustment instructions in Section 6:
Maintenance.
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 damaged. Replace if necessary.
Inspect inlet valve and insure free oper-
ation (see Section 6).
Remove element cover and clean ori-
fice.
Change separator element.
Check all pipes, connections and com-
ponents.
Drain and change.
Drain Access
Replace shaft seal.
See Symptom "Line Pressure Rises
Above Cutout Pressure Setting on Pres-
sure Switch" above.
Replace pressure relief valve.
Remove the water vapor from com-
pressed 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 aerosols or for oil vapor removal.
Change cartridges as
recommended by the filter
manufacturer.) Check all drain traps rou-
tinely to insure their proper
operation. Maintain them regularly.