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This section provides a list of the more frequently encountered compressor malfunctions, their causes and corrective
actions. Some corrective actions can be performed by the operator or maintenance personnel, but others may require
assistance of a qualified electrician or Service Center.
Failure
Loose electrical connection.
Compressor won't
start.
Blown Fuse.
Malfunction in valves.
Compressor runs
Fittings are loose.
continuously and air
Restricted air filter.
flow lower than
Dirty or defective check valve.
normal.
Excessive air usage.
Excessive water in air tank.
Excessive moisture
in discharge.
High ambient temperature and / or humidity.
Compressor runs
Defective pressure switch or improper
continuously
adjustment.
causing safety relief
Defective safety relief valve.
valve to open.
Loose valves.
Excessive noise.
Loose piping.
Foreign material on the piston.
Undersized unit for air requirements.
Compressor over
Air leaks in the system.
heated.
Restricted air filter.
Worn or damaged valve.
Compressor will not
Pressure switch unloading the valve may be
dirty or faulty.
unload when
stopped.
Check valve may be dirty or faulty.
Troubleshooting
Possible Cause
14
Corrective Action
Check wiring connection.
Replace fuse (recommendation on page 5).
Check inlet, exhaust, and drain valves
Tighten fittings.
Clean or replace filter.
Remove and clean or replace check valve.
Decrease air usage.
Drain tank, tilt tank to drain. Drain tank more
frequently.
Move compressor to area with less humidity,
or use airline filter.
Check for proper adjustment and if problem
persists replace pressure switch.
Replace valve.
Inspect valve for damage.
Tighten as required.
Clean the piston.
Contact your compressor distributor.
Fix leaks.
Clean or replace the filter.
Clean or replace the valves.
Clean, repair, or replace pressure switch.
Clean, repair, or replace the check valve.
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