Vanair AIR N ARC RELIANT 150 Series Operations Manual & Parts List page 56

SECTION 6: TROUBLESHOOTING
6.2 TROUBLESHOOTING GUIDE
Fault/Malfunction
Compressor will not build up
pressure (continued)
Excessive moisture in the
compressed air
Compressor system over-
pressures
PAGE - 46
Possible Cause
COMPRESSOR (CONTINUED)
Input rpm too low
Service valve is open
Pressure gauge is malfunctioning
Discharge piping leaks
Compressor incorrectly sized
Head gasket leaking
Dirty or plugged inter-cooler tubes
Worn or defective compressor valves
Worn piston, worn out rings
Moisture accumulating in air tank
Excessive compressor heat
Damaged/kinked control line
Restriction in control line
Control line connections are not prop-
erly seated/poor connection quality
Pilot valve out of adjustment or
malfunctioning
090051-OP_r0 (FEB-2014)
AIR N ARC
Corrective Action
Adjust to proper setting.
Close service valve.
Check pressure gauge function/control line
routing: adjust, repair or replace as
necessary.
Check for proper operation with an auxiliary
air source. Replace if necessary.
Tighten connections; replace faulty piping.
Match task requirements within the
compressor specification range.
Replace head gasket.
Remove and clean inter-cooler tubes.
Replace worn parts.
Replace worn parts.
Drain water from air tank. Refer to Section
5.3, Maintenance Schedule Table, and
Section 7.11, Installation and Dimension
Diagram.
Allow compressor to cool down.
Check line for damage (wear, kinks, etc.).
Re-route, re-tie or replace if necessary.
Clean if soiled; if ice is present, clear and
remove.
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).
Pressure settings may need to be reset.
Continued on next page
Vanair Manufacturing, Inc.
vanair.com • 800-526-8817
®
150 SERIES