Vanair AIR N ARC RELIANT 150 Series Operations Manual & Parts List page 57

®
AIR N ARC 150 SERIES
6.2 TROUBLESHOOTING GUIDE
Fault/Malfunction
Compressor system over-
pressures (continued)
No service air output
Low service air output
Excess amount of oil in air
discharge
Water in crankcase
Oil breaking up
Oil gets dirty; rusty valve or
cylinder
Vanair Manufacturing, Inc.
vanair.com • 800-526-8817
Possible Cause
COMPRESSOR (CONTINUED)
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
Clogged compressor air filter
Pilot valve sticking
Incorrect compressor speed
Compressor oil level too high
Compressor overheated
Restricted air filter
Improper oil viscosity
Worn piston rings
Cycle too short; compressor does not
operate long enough to vaporize
condensed moisture during
compression.
Compressor operating outside in cold
conditions or inlet filter not protected
against weather.
090051-OP_r0 (FEB-2014)
SECTION 6: TROUBLESHOOTING
Corrective Action
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 5.5.2, Replacing and Re-
tensioning the Compressor and/or
Generator Drive Belts.
Check air filter. Replace if necessary.
Replace pilot valve.
Adjust speed.
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.
Air pressure regulated too high.
Clean or replace air filter.
Drain and replace oil.
Replace piston rings.
Allow for a longer operating cycle.
Provide adequate protection against
extreme weather conditions.
Continued on next page
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