Section 6
MAINTENANCE
23
COMPRESSOR SHUTS DOWN
WITH AIR DEMAND PRESENT
COMPRESSOR WILL NOT
BUILD UP FULL DISCHARGE
PRESSURE
LINE PRESSURE RISES
ABOVE CUT-OUT PRESSURE
SETTINGON PRESSURE
SWITCH
EXCESSIVE COMPRESSOR
FLUID CONSUMPTION
PRESSURE RELIEF VALVE
OPENS REPEATEDLY
Low Incoming Voltage
Discharge Temperature Switch Open
Air Demand Is Too Great
Dirty Air Filter
Pressure Regulator Out Of
Adjustment
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
Consult power company.
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; replace
element.
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 adjust-
ment instructions in Section 6,
Maintenance.
Check for leaks.
Check that diaphragm and contacts are not
damaged. Replace if necessary.
Inspect inlet valve and insure free operation
(see Section 6).
Remove element cover and clean orifice.
Change separator element.
Check all pipes, connections and compo-
nents.
Drain and change.
Drain excess.
Replace shaft seal.
See Symptom "Line Pressure Rises Above
Cut-out Pressure Setting on Pressure
Switch" above.
Replace pressure relief valve.
TROUBLESHOOTING GUIDE (CONTINUED)
SYMPTOM CAUSE REMEDY
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