SECTION 6: TROUBLESHOOTING
AIR N ARC
®
150 SERIES
PAGE - 50
090043-OP_r0 (MARCH - 2015)
VANAIR MANUFACTURING, INC.
(800) 526-8817 • www.vanair.com
COMPRESSOR (CONTINUED)
Excessive moisture in the
compressed air
Moisture accumulating in air tank
Drain water from air tank. Refer to
Section
5.3, Maintenance Schedule Table
,
and
Section 7.15A - 7.15C, Installation and
Dimension Diagram
.
Excessive compressor heat
Allow compressor to cool down.
Compressor system over-
pressures
Damaged/kinked control line
Check line for damage (wear, kinks, etc.).
Re-route, re-tie or replace if necessary.
Restriction in control line
Clean if soiled; if ice is present, clear and
remove.
Control line connections are not prop-
erly seated/poor connection quality
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).
Pilot valve out of adjustment or
malfunctioning
Pressure settings may need to be reset.
Unloaders stuck
Lubricate
Pressure gauge is malfunctioning
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.
Defective safety valve
Replace safety valve.
No service air output
If equipped, OSHA valve/velocity fuse,
not functioning properly
Reset or replace OSHA valve.
Belt(s) not adjusted properly, worn or
slipping/belt broken
Belt(s) out of position or malfunctioning.
Consult
Section 5.5.3, Replacing and Re-
tensioning the Compressor and/or
Generator Drive Belts
.
Bad discharge check valve
Replace check valve.
Low service air output
Clogged compressor air filter
Check air filter. Replace if necessary.
Pilot valve sticking
Replace pilot valve.
Incorrect compressor speed
Adjust speed.
Discharge OSHA check valve
Replace check valve.
Unloaders stuck
Repair or replace unloaders.
Continued on next page
6.2 TROUBLESHOOTING GUIDE
Fault/Malfunction
Possible Cause
Corrective Action
