Sullair E900H User Manual page 59

E900H User Manual
Table 7-1: Troubleshooting guide
Symptom
Improper unloading with an
excessive pressure build-
up causing relief valve to
open.
Excessive fluid consump-
tion
Pressure relief valve opens
repeatedly
Probable cause
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 level is too high
Defective pressure relief valve
Unload pressure set too high
Failure to unload solenoid valve
02250203-986 R03
Subject to EAR, ECCN EAR99 and related export control restrictions.
7: Troubleshooting
Remedy
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 compo-
nents.
Ice in control line or components. Run
fan in REVERSE direction when oper-
ating below freezing.
Clean orifice or strainer.
Change separator.
Check all pipes, connections and com-
ponents.
Drain and change.
Drain and change.
Increase compressor operating pres-
sure
Drain excess fluid.
Replace.
Adjust Pressure switch per Section
6.13.3: Unload pressure setting on
page 49.
Replace or repair solenoid valve
53