AIR N ARC
®
150 SERIES
SECTION 6: TROUBLESHOOTING
090043-OP_r0 (MARCH - 2015)
PAGE - 49
VANAIR MANUFACTURING, INC.
(800) 526-8817 • www.vanair.com
COMPRESSOR (CONTINUED)
Compressor will not build up
pressure (continued)
Drain cock open
Close drain cock.
Pilot valve out of adjustment or
malfunctioning
Pressure settings may need to be reset.
Refer to
Section 5.5.1, Adjusting
Compressor Cut-in / Cut-out Pressure.
Obstructed or restricted intake air flow
Check for obstructions (frame, body, etc.) to
air filter vents. Replace air filter if necessary.
Belt(s) slipping or broken
Re-situate and adjust belt tension, or
replace belt if necessary. Consult
Section
5.5.3, Replacing and Re-tensioning the
Compressor and/or Generator Drive
Belts.
Engine governor stuck
Free governor and lubricate if necessary.
Consult the Engine Owner’s Manual.
Unloader valve(s) sticking or faulty
Clean or rebuild/replace.
Pressure relief valve not operating
properly
Replace if necessary.
Leak in air system
Inspect air system for leaks.
Faulty throttle solenoid
Check throttle solenoid; replace if
necessary.
Check throttle relay; replace if necessary.
Input rpm too low
Adjust to proper setting.
Service valve is open
Close service valve.
Pressure gauge is malfunctioning
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.
Compressor incorrectly sized
Match task requirements within the
compressor specification range.
Head gasket leaking
Replace head gasket.
Dirty or plugged inter-cooler tubes
Remove and clean inter-cooler tubes.
Worn or defective compressor valves
Replace worn parts.
Worn piston, worn out rings
Replace worn parts.
Continued on next page
6.2 TROUBLESHOOTING GUIDE
Fault/Malfunction
Possible Cause
Corrective Action
