PROBLEM
Motor will not run.
Motor will not run.
Knocking Noise.
Squealing sound.
Air vent on dipstick
is blocked.
CAUSE
Fuse blown, circuit
breaker tripped.
Extension cord is
wrong length or gauge.
Loose electrical
connections.
Possible defective motor
or starting capacitor.
Motor overload
protection switch
has tripped.
Tank pressure exceeds
pressure switch
"cut-in" pressure.
Check valve stuck open. Have checked by a Trained
Paint spray on internal
motor parts.
Pressure release valve
on pressure switch
has not unloaded
head pressure.
Possible defect in
safety valve.
Defective check valve.
Carbon build-
up in pump.
Compressor pump
has no oil.
Air vent clogged
with debris.
19 - ENG
CORRECTION
Check fuse box for blown fuse
and replace as necessary. Reset
circuit breaker. Do not use a fuse
or circuit breaker with higher
rating than that specified for
your particular branch circuit.
Check for proper fuse. You
should use a time delay fuse.
Check for low voltage problem.
Check the extension cord.
Disconnect the other electrical
appliances from circuit or
operate the compressor on
its own branch circuit.
Check the extension cord.
Check wiring connection under
pressure switch cover.
Have checked by a Trained
Service Technician.
Refer to Motor Overload
Protection under Operation. If
motor overload protection trips
frequently, have checked by a
Trained Service Technician.
Motor will start automatically
when tank pressure drops
below "cut-in" pressure
of pressure switch.
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 Auto/
Off switch on the pressure switch
to the "Off" position; if the valve
does not open, replace switch.
Operate safety valve manually
by pulling on ring. If valve still
leaks, it should be replaced.
Have checked by a Trained
Service Technician.
Have checked by a Trained
Service Technician.
See Pump Oil-Checking
paragraph in the
Maintenance section.
Clean air vent or replace dipstick.