Sullair LS-10 series, Operator'S Manual

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Section 6
TROUBLESHOOTING
30
TROUBLESHOOTING-- STANDARD ELECTRO-MECHANICAL (CONTINUED)
SYMPTOM PROBABLE CAUSE REMEDY
COMPRESSOR SHUTS DOWN WITH Discharge Temperature Switch Thermal valve not functioning properly;
AIR DEMAND PRESENT (cont.) Open (cont.) replace element.
Water flow regulating valve not functioning
properly; change (water--cooled only).
Defective discharge temperature switch;
check for a short or open circuit to probe
and correct wiring.
COMPRESSOR WILL NOT BUILD Air Demand is Too Great Check service lines for leaks or open valves up
FULL DISCHARGE PRESSURE.
Dirty Air Filter Check the filter indicator and inspect and/or
change element if required.
Pressure Regulator Out of Adjustment Adjust regulator according to control
adjustment instructions in the Maintenance
section.
Defective Pressure Regulator Check diaphragm and replace if necessary
(kit available).
LINE PRESSURE RISES ABOVE Leak in Control System Causing Check for leaks.
CUT--OUT PRESSURE SETTING Loss of Pressure Signals
ON PRESSURE SWITCH
Defective Pressure Switch Check that diaphragm and contacts are not
damaged. Replace if necessary.
Defective Regulator Valve Check that air bleeds from control orifice
when the pressure switch contacts open.
Readjust; Repair or replace it if necessary (kit avail
able).
Plugged Control Line Strainer Clean strainer (screen and o-ring replacement kit
available).
Defective Blowdown Valve Check that sump pressure is exhausted to
the atmosphere when the pressure switch
contacts open. Repair or replace if neces--
sary (kit available).
High Pressure Shutdown Switch is Readjust or replace.
Defective or Incorrectly Adjusted
EXCESSIVE COMPRESSOR FLUID Clogged Return Line or Orifice Clean strainer (screen and o--ring replace--
CONSUMPTION ment kit available).
Clean orifice.
Separator Element Damaged or
Not Functioning Properly Change separator.
Leak in the Lubrication System Check all pipes, connections and compo--
nents.
Excess Fluid Foaming Drain and change.
Fluid Level Too High Drain and change.
PRESSURE RELIEF VALVE OPEN Defective Pressure Relief Valve Replace.
REPEATEDLY
Plugged Separator Check separator differential.
LIQUID WATER IN COMPRESSED Water Vapor Condensation from Cooling Remove the water vapor from compressed air prior
AIR LINES and Compression Occurs Naturally to distribution through the air system. Check opera--
tion 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 routinely
to insure their proper operation. Maintain them regu--
larly.