TROUBLESHOOTING GUIDE (CONTINUED)
SYMPTOM
POSSIBLE CAUSE(S)
CORRECTIVE ACTION
Excessive moisture in discharge
air
1. Excessive water in tank
1. Drain tank.
2. High humidity
2. Move to area of less humidity; use air line filter.
Knocks, rattles, and/or
excessive vibration
1. Loose mounting bolts
1. Tighten bolts.
2. Tank not level
2. Use sturdy wedge / object to bring tank to level
position.
3. Cylinder or piston is worn/scored
3. Replace or repair as necessary.
Compressor runs continuously
and safety valve opens as
pressure rises
1. Defective pressure switch
1. Replace switch.
2. Defective safety valve
2. Replace safety valve with genuine replacement
part.
Air leaking from unloader
valve on pressure switch
1. Check valve stuck in an open position
1. Replace check valve.
2. Unloader valve stuck in open
position
2. Replace unloader valve.
Do not disassemble check valve
with air pressure in tank; bleed
tank.
MAINTENANCE /
REP
AIR
TROUBLESHOOTING
OPERA
TION
ASSEMBL
Y /
INST
ALLA
TION
SAFETY /
SPECIFICA
TIONS
GETTING
ST
AR
TED
10
