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