Porter-Cable C7501M - Manual (Page 21)

21 - ENG N020206
PROBLEM CAUSE CORRECTION
Compressor is
not supplying
enough air
to operate
accessories
Prolonged excessive
use of air.
Decrease amount of air usage.
Compressor is not large
enough for air requirement.
Check the accessory air
requirement. If it is higher than
the SCFM or pressure supplied
by your air compressor, you
need a larger compressor.
Hole in hose. Check and replace if required.
Check valve restricted. Remove and clean, or replace.
Air leaks. Tighten fittings.
Restricted air intake filter. 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.
Loose belt. Loosen wingnut and then
tighten wingnut until it contacts
the washer, plus one turn.
Restricted
air intake
Dirty air filter. Clean or replace. See Air
Filter paragraph in the
Maintenance section.
Motor will
not run
Motor overload protection
switch has tripped.
Refer to Motor Overload Protection
under Operation. If motor overload
protection trips frequently, contact
a Trained Service Technician
Tank pressure exceeds
pressure switch "cut-
in" pressure.
Motor will start automatically when
tank pressure drops below "cut-
in" pressure of pressure switch.
Check valve stuck open. Remove and clean, or replace.
Loose electrical
connections.
Check wiring connection
inside pressure switch and
terminal box area.
Possible defective motor
or starting capacitor.
Have checked by a Trained
Service Technician.
Paint spray on internal
motor parts.
Have checked by a Trained Service
Technician. Do not operate the
compressor in the paint spray area.
See flammable vapor warning.
Pressure release valve on
pressure switch has not
unloaded head pressure.
Bleed the line by pushing the
lever on the pressure switch to
the "Off" position; if the valve
does not open, replace switch.