Vanair ALL-IN-ONE POWER SYSTEM AIR N ARC 150 Series Operations Manual & Parts List page 60

SECTION 6: TROUBLESHOOTING
6.2 TROUBLESHOOTING GUIDE
Fault/Malfunction
Excessive moisture in the
compressed air
Compressor system over-
pressures
No service air output
Low service air output
PAGE - 50
Possible Cause
COMPRESSOR (CONTINUED)
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
Unloaders stuck
Pressure gauge is malfunctioning
Defective safety valve
If equipped, OSHA valve/velocity fuse,
not functioning properly
Belt(s) not adjusted properly, worn or
slipping/belt broken
Bad discharge check valve
Clogged compressor air filter
Pilot valve sticking
Incorrect compressor speed
Discharge OSHA check valve
Unloaders stuck
090043-OP_r0 (MARCH - 2015)
AIR N ARC
Corrective Action
Drain water from air tank. Refer to Section
5.3, Maintenance Schedule Table, and
Section 7.15A - 7.15C, 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.
Lubricate
Check for proper operation with an auxiliary
air source. Replace if necessary.
Check pressure gauge function/control line
routing: adjust, repair or replace as
necessary.
Replace safety valve.
Reset or replace OSHA valve.
Belt(s) out of position or malfunctioning.
Consult Section 5.5.3, Replacing and Re-
tensioning the Compressor and/or
Generator Drive Belts.
Replace check valve.
Check air filter. Replace if necessary.
Replace pilot valve.
Adjust speed.
Replace check valve.
Repair or replace unloaders.
Continued on next page
VANAIR MANUFACTURING, INC.
(800) 526-8817 • www.vanair.com
®
150 SERIES