Vanair AIR N ARC RELIANT 300 Series Operations Manual & Parts List page 122

SECTION 7: TROUBLESHOOTING
7.2 TROUBLESHOOTING GUIDE
Fault/Malfunction
Compressor will not build up
pressure (continued)
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.
PAGE - 104
AIR IN ARC
Possible Cause
COMPRESSOR (CONTINUED)
Inlet valve fails to open or is frozen
shut.
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
Damaged inlet seat
Inlet valve piston is stuck in down posi-
tion.
Compressor shaft seal is leaking
Minimum pressure/check valve is
malfunctioning
090034-OP_r0
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300 SERIES ALL-IN-ONE POWER SYSTEM
Corrective Action
Repair/replace inlet valve. Refer to Section
6.6.2, Repairing the Air Inlet Valve. Order
inlet valve repair kit—see Table 9A:
Recommended Spare Parts List.
Reset pressure switch. Refer to Section
2.2.7, Adjustable Pressure Switch, and
Section 6.6.13, 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.
Rebuild inlet assembly.
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.
Continued on next page
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