1800-3000 USER MANUAL SECTION 6
66
Compressor Shuts Down With Air
Demand Present
Loss of Control Voltage Reset. If trouble persists, check that line
pressure does not exceed maximum oper-
ating pressure of the compressor (specified
on nameplate).
Low Incoming Voltage Consult power company.
Excessive Operating Pressure —
Separator Requires Maintenance Check maintenance indicator under full load
conditions.
High Pressure Setting in WS Con-
troller Set Wrong
Reset.
Defective Unload Solenoid Valve WS Controller will energize valve to close.
Repair if defective.
Defective Blowdown Valve Blowdown valve should exhaust separator/
sump tank pressure to 18 psig (1.2 bar)
when maximum operating pressure is
reached. Repair if defective.
High Discharge Temperature —
Cooling Air Flow Restricted Clean cooler and check for proper ventila-
tion.
Ambient Temperature Is Too High Provide sufficient ventilation.
Low Fluid Level Add fluid.
Thermal Valve Not Functioning
Properly
Replace element.
Compressor Will Not Build Full Dis-
charge Pressure
Air Demand Is Too Great Check service lines for leaks or open
valves.
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 Adjust-
ment
Adjust regulator according to control
adjustment instructions in the Maintenance
.
Defective Pressure Regulator Check diaphragm and replace if necessary
(kit available).
Defective Unload Solenoid Valve Check that the valve closes when
energized. Replace the coil or the complete
valve if defective.
Sheared Coupling Element Replace coupling element. Refer to Shaft
Coupling Maintenance on page 65.
SYMPTOM PROBABLY CAUSE REMEDY
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