6.10
TROUBLESHOOTING GUIDE
SYMPTOM PROBABLE CAUSE REMEDY
Compressor Will Not Start Main Disconnect Switch Open Close switch.
Line Fuse Blown Replace fuse.
Motor Starter Overload Tripped Reset. Should trouble persist, check
whether motor starter contacts are
functioning properly.
Low Incoming Line Voltage Check voltage. Should voltage check low,
consult power company.
Compressor Shuts Down With Air Demand
Present
Loss of Control Voltage Check power supply for 24V DC output.
Replace power supply if necessary.
Low Incoming Voltage Consult power company.
Excessive Operating Pressure Reset. If trouble persists, check that line
pressure does not exceed maximum
operating pressure of the compressor
(specified on nameplate).
Separator Requires Maintenance Indicated
by WS Controller
Replace separator.
Machine Programmed for Wrong Pressure
Setting
Reprogram with WSPC equipped laptop.
Defective Regulator Valve Regulator valve should cause inlet valve to
close when the pressure switch contacts
open. Repair if defective.
Defective Blowdown Valve Blowdown valve should exhaust receiver
tank pressure to 18 psig (1.2 bar) when
maximum operating pressure is reached.
Repair if defective.
Cooling Water Temperature Too High
Reduce water temperature to 85°F
(29.4°C) or less. Water-cooled only.
Cooling Water Flow Insufficient Check water lines and valves
(water-cooled only).
Cooler Plugged Clean tubes. If plugging persists, install
water conditioner (water-cooled only).
Cooling Air Flow Restricted Clean cooler and check for proper
ventilation.
Ambient Temperature Is Too High Provide sufficient ventilation.
Low Fluid Level Add fluid.
Clogged Filter Change the fluid filter element.
Thermal Valve Not Functioning Properly Replace element.
Water Flow Regulating Valve Not
Functioning Properly
Change (water-cooled only).
SECTION 6
66
3000-4500 Operator’s Manual and Parts List
®SULLAIR®
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