6.9 TROUBLESHOOTING GUIDE (CONTINUED)
Symptom
PROBABLE CAUSE
REMEDY
Compressor Will Not Build Full Discharge
Pressure
Air Demand is Too Great
Check service lines for leaks or open valves
up.
Dirty Air Filter
Check the filter indicator and inspect and/or
change element if required.
Inlet Valve Bleed Orifice Plugged
Ensure control line bleed orifice located in
assembly on top of air end is not plugged.
Pressure Regulator Out of Adjustment
Adjust regulator according to control
adjustment instructions in
Pressure Regulator Adjustment on
Defective Pressure Regulator
Check diaphragm and replace if necessary
(kit available).
Check that the valve closes when
energized. Replace the coil or the complete
valve if defective.
Line Pressure Rises Above Unload
Pressure Set-Point
Leak in Control System Causing Loss of
Pressure Signals
Check for leaks.
Inlet Valve Stuck Open
Remove the intake hose and check for inlet
valve operation.
Defective Unload Solenoid Valve
Check that the valve is open when de-
energized. Replace if necessary.
Clean strainer (screen and O-ring
replacement kit available).
Defective Blowdown Valve
Check that receiver tank pressure is
exhausted to the atmosphere when the
solenoid valve opens. Repair or replace if
necessary (kit available).
Excessive Compressor Fluid Consumption Clogged Return Tube or Orifice
Clean orifice.
Separator Element Damaged or Not
Functioning Properly
Change separator.
Leak in the Lubrication System
Check all pipes, connections and
components.
Excess Fluid Foaming
Drain and change.
Fluid Level Too High
Drain and change.
Pressure Relief Valve Opens Repeatedly
Defective Pressure Relief Valve
Replace.
Plugged Separator
Check separator differential.
SECTION 6
44
1100e, 1500e, 1800e Operator’s Manual and Parts List
®
SULLAIR
®
Summary of Contents for 1107e
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