AIR N ARC
®
150 SERIES
SECTION 6: TROUBLESHOOTING
090051-OP_r0 (FEB-2014)
PAGE - 47
Vanair Manufacturing, Inc.
vanair.com • 800-526-8817
COMPRESSOR (CONTINUED)
Compressor system over-
pressures (continued)
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 5.5.2, Replacing and Re-
tensioning the Compressor and/or
Generator Drive Belts
.
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.
Excess amount of oil in air
discharge
Compressor oil level too high
The correct oil level is the half-way mark on
the sight glass with the compressor shut
down, and the machine on a level surface.
Drain excess oil to correct level.
Compressor overheated
Air pressure regulated too high.
Restricted air filter
Clean or replace air filter.
Improper oil viscosity
Drain and replace oil.
Worn piston rings
Replace piston rings.
Water in crankcase
Oil breaking up
Oil gets dirty; rusty valve or
cylinder
Cycle too short; compressor does not
operate long enough to vaporize
condensed moisture during
compression.
Allow for a longer operating cycle.
Compressor operating outside in cold
conditions or inlet filter not protected
against weather.
Provide adequate protection against
extreme weather conditions.
Continued on next page
6.2 TROUBLESHOOTING GUIDE
Fault/Malfunction
Possible Cause
Corrective Action
