Craftsman 16781 - Professional 80 Gal. Vertical Air Compressor Owner's Manual page 22

PROBLEM
Compressor is
not supplying
enough air
to operate
accessories
CAUSE
Prolonged excessive use
of air.
Compressor is not large
enough for air requirement.
Hole in hose.
Check valve restricted.
Air leaks.
Restricted air intake filter.
Loose belt.
Restricted air Dirty air filter.
intake
Motor will not Motor overload protection
run switch has tripped.
Tank pressure exceeds
)ressure switch "cut-in"
)ressure.
Check valve stuck open.
Loose electrical
connections.
Possible defective motor
or starting capacitor.
Paint spray on internal
motor parts.
Pressure release valve on
pressure switch has not
unloaded head pressure.
CORRECTION
Decrease amount of air usage.
Check the accessory air requirement.
If it is higher than the SCFM or
pressure supplied by your air
compressor, you need a larger
compressor.
Check and replace if required.
Remove and clean, or replace.
Tighten fittings.
Clean or replace air intake filter. Do
not operate the air compressor with
the filter removed. Refer to the "Air
Filter" paragraph in the Maintenance
section.
Check belt tension, see Adjusting
Belt Tension in the Maintenance
section.
Clean or replace. See Air Filter
paragraph in the Maintenance
section.
Refer to "Motor Overload Protection"
under Operation. If motor overload
protection trips frequently, contact a
Trained Service Technician
Motor will start automatically when
tank pressure drops below "cut-in"
)ressure of pressure switch.
Remove and clean, or replace.
Check wiring connection inside
pressure switch and terminal box
area.
Have checked by a Trained Service
Technician.
Have checked by a Trained Service
Technician. Do not operate the
compressor in the paint spray area.
See flammable vapor warning.
Bleed the line by pushing the lever
on the pressure switch to the "Off"
position; if the valve does not open,
replace switch.
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