Sullair LS-25S Operator's Manual And Parts List page 45

Section 6
MAINTENANCE
TROUBLESHOOTING (continued)
SYMPTOM
COMPRESSOR SHUTS DOWN
WITH AIR DEMAND PRESENT
(cont'd.)
COMPRESSOR WILL NOT BUILD
UP FULL DISCHARGE PRESSURE
LINE PRESSURE RISES ABOVE
UNLOAD P2 PRESSURE
SETTING ON THE
SUPERVISOR
EXCESSIVE FLUID
CONSUMPTION
PRESSURE RELIEF VALVE
OPENS REPEATEDLY
LIQUID WATER IN COMPRESSED
AIR LINES
40
PROBABLE CAUSE
Low Fluid Pressure
("Low Pressure P3" display)
Low Water Pressure
("Fan OL/Low Water" display)
Air Demand is Too Great
Dirty Air Filter
Pressure Regulator Out
of Adjustment
Defective Pressure Regulator
Leak in Control System Causing
Loss of Pressure Signals
Defective Solenoid Valve
Defective Blowdown Valve
Plugged Control Line Filter
Clogged Return Line Strainer
or Orifice
Separator Element Damaged or
Not Functioning Properly
Leak in the Lubrication System
Excess Fluid Foaming
Fluid Level Too High
Defective Pressure Relief Valve
Water Vapor Condensation From Cooling Remove the water vapor from compressed air prior
and Compression Occurs Naturally
REMEDY
Check fluid level.
Check the cooling fan motor or water
flow system.
Check service lines for leaks or open
valves.
Check for filter maintenance message on
Supervisor panel and change
element if required.
Adjust regulator according to control
adjustment instructions in the Maintenance
Section.
Check diaphragm and replace if necessary
(kit available).
Check for leaks.
Check that Sullicon Control lever is moved
to unload stop when Supervisor is in NO
LOAD mode. Repair or replace if
necessary (kit available).
Check that sump pressure is exhausted to
the atmosphere when in the OFF LOAD
mode. Repair or replace if necessary
(kit available).
Clean or repair if necessary.
Clean strainer (replacement kit available).
Clean orifice.
Change separator element(s).
Check all pipes, connections and compo---
nents.
Drain and change.
Drain excess fluid.
Replace pressure relief valve.
Check Separator Differential
∆P1.
(plugged)
to distribution through the air system. Check
operation 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 regularly.