Compressor unit starts
Large amount of
Drain off condensation
and stops more
condensation in air receiver.
AT LEAST once a week.
frequently than usual.
Leaks in control unit or
Locate leaks (by means of
inspection cover.
soapy water) and repair.
Too little pressure differential.
Adj. pressure switch
(see fig.4).
Compressor unit starts
Leaks in pipework system
Locate and repair leaks.
when no air is being
used.
Compressor’s oil
Too much oil in compressor.
Check oil level 2 or 3
consumption rising.
minutes after stopping.
Leaks around crank case.
Change seal and inspect
packing surfaces. Repair
or replace defective parts.
Working temperature of
Increase ventilation to
compressor too high because
air comprressor.
of insufficient cooling.
Unit too small in proportion
Connect supplementary.
to air consumption.
Semi-automatic unit Load too
Convert to fully
small.
automatic operation.
Cylinder worn.
Replace worn parts or send
compressor pump for an
overhaul
Intake air filter blocked.
Change air filter.
Oil in the air delivered.
Sump over full.
Reduce oil to correct level.
Cylinder worn.
Replace worn parts or send
compressor pump for an
overhaul.
Governor controlled unit
Convert to automatic
running off load for too long
control.
a period.
Intake air filter blocked.
Change air filter.
Oil level rises although
Condensation in oil pump.
Compressor over
-no oil has been put in.
dimensioned.
Condensation in crank
Compressor overdimensioned
a) Frequent oil changes.
case (especially in
(operational periods too short
b) Reduce cooling of crank
2-stage compressors).
in relation to resting periods).
case (eg. by shielding it
from air stream).
c) Reduce RPM of pump.
SYMPTOM
PROBABLE CAUSES
REMEDY
16
