Vanair AIR N ARC RELIANT 300 Series Operations Manual & Parts List page 129

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AIR IN ARC 300 SERIES ALL-IN-ONE POWER SYSTEM
7.2 TROUBLESHOOTING GUIDE
Fault/Malfunction
Compressor system over-
pressures
This condition will cause a
compressor shutdown, and a
fault light will turn on. Before
restarting the compressor,
determine the cause of the over-
pressure. May also cause the
relief valve to open.
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Possible Cause
COMPRESSOR (CONTINUED)
Pressure switch setting too high
Pressure switch malfunction
Unload solenoid valve defective
Leak in air control line
Restriction in control line
Damaged/kinked control line
Control line connections are not prop-
erly seated/poor connection quality
Inlet valve Teflon "O" ring popped out of
groove
Inlet valve piston is stuck in down posi-
tion.
Compressor shaft seal is leaking
Minimum pressure/check valve is
malfunctioning
Pressure gauge is malfunctioning
Defective safety valve
Plugged coalescer
090012-OP_r0
SECTION 7: TROUBLESHOOTING
Corrective Action
Reset pressure switch. Refer to Section
2.2.7, Adjustable Pressure Switch, and
Section 6.6.14, Adjusting the Pressure
Setting. Replace if switch continues to
deviate from setting.
Check for operation/damage: repair or
replace.
Replace solenoid valve.
Check for leaks and take corrective action.
Clean if soiled; if ice is present, clear and
remove.
Check line for damage (wear, kinks, etc.).
Re-route, re-tie or replace if necessary
(refer to Appendix A, A.6 Hose Installa-
tion Guide for assistance in running or
checking hose lines).
Check lines for proper seating/ensure line
ends have been cut cleanly and are square
(DO NOT use wire cutters: use a loom cut-
ting tool or a clean, sharp razor blade).
Replace "O" ring: Refer to Section 6.6.2,
Repairing the Air Inlet Valve. Order inlet
valve repair kit—see Table 9A: Recom-
mended Spare Parts List.
Check for proper operation with an auxiliary
air source—replace or rebuild inlet valve.
Consult Section 6.6.2.
Replace shaft seal with available kit. Refer
to Section 6.6.7.
Rebuild or replace check valve: Refer to
Section 6.6.10; order check valve repair
kit—see Table 9A: Recommended Spare
Parts List.
Check gauge for proper operation; replace if
necessary and check controls.
Replace safety valve.
Replace coalescer. Refer to Section 6.6.6,
Replacing the Spin-on Air/Oil Coalescer.
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