Campbell Hausfeld HU500000 Mode D'emploi page 7

troubleshooting Chart
Symptom
Knocks, rattles, and/or
excessive vibration
Compressor runs
continuously and safety
valve opens as pressure
rises
Air leaking from
unloader valve on
pressure switch
(Continued)
possible Cause(s)
1. Loose mounting bolts
2. Tank not level
3. Cylinder or piston is worn/
scored
1. Defective pressure switch
2. Defective safety valve
1. Check valve stuck in an open
position
2. Unloader valve stuck in open
position
Corrective action
1. Tighten bolts.
2. Use sturdy wedge / object to bring tank to level position.
3. Replace or repair as necessary.
1. Replace switch.
2. Replace safety valve with genuine replacement part.
1. Replace check valve.
2. Replace unloader valve.
Do not disassemble check valve with
air pressure in tank; bleed tank.
7
HU500000
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