Sullair E900H User Manual page 48

E900H USER MANUAL
Table 7-1: Troubleshooting Guide
SYMPTOM
Compressor Will Not Build
Full Discharge Pressure
Improper unloading with
an excessive pressure
build-up causing relief
valve to open.
Excessive Fluid
Consumption
Pressure Relief Valve
Opens Repeatedly
48
PROBABLE CAUSE
Air Demand is Too Great
Dirty Air Filter
Inlet Valve Bleed Orifice Plugged
Pressure Regulator Out of
Adjustment
Defective Pressure Regulator
Leak in Control System causing
Loss of Pressure Signals
Inlet Valve Stuck
Defective Unload Solenoid Valve
Defective Blowdown Valve
Plugged Control Line Filter
Restriction in the control system
Clogged Return Tube or Orifice
Separator Element Damaged or
Not Functioning Properly
Leak in the Lubrication System
Excess Fluid Foaming
Fluid Level Too High
Operating pressure lower than
rated pressure
Fluid leve is too high
Defective Pressure Relief Valve
Unload Pressure set too high
Failure to unload solenoid valve
02250203-986 R01
REMEDY
Check service lines for leaks or open valves up.
Check the filter indicator and inspect and/or
change element if required.
Ensure control line bleed orifice is not plugged.
Adjust regulator according to control adjustment
instructions in the Maintenance Section.
Check diaphragm and replace if necessary
(kit available).
Check valve operation. Replace the coil or the complete
valve if defective.
Worn seals in inlet valve. Replace seals (kits available).
Defective pressure regulating valves; repair valves
(kits available).
Free or repair inlet valve
Check the valve operation. Replace if necessary.
Clean strainer (screen and O-ring
replacement kit available).
Check that the sump pressure is exhausted to the
atmosphere when in the unloaded mode. Repair or
replace if necessary (kit available).
Clean or repair as necessary
Check all control lines and components.
Ice in control line or components. Run fan in REVERSE
direction when operating below freezing.
Clean orifice or strainer.
Change separator.
Check all pipes, connections and components.
Drain and change.
Drain and change.
Increase comperssor operating pressure
Drain excess fluid.
Replace.
Adjust Pressure switch per UNLOAD PRESSURE
SETTING on page 46.
Replace or repair solenoid valve
SECTION 7