19 - ENG
PROBLEM
CAUSE
CORRECTION
Motor will not run.
Fuse blown, circuit
breaker tripped.
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.
Extension cord is
wrong length or gauge.
Check the extension cord.
Loose electrical
connections.
Check wiring connection under
pressure switch cover.
Possible defective motor
or starting capacitor.
Have checked by a Trained
Service Technician.
Motor overload
protection switch
has tripped.
Refer to
Motor Overload
Protection
under
Operation
. If
motor overload protection trips
frequently, have checked by 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. Have checked by a Trained
Service Technician.
Motor will not run.
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 Auto/
Off switch on the pressure switch
to the "Off" position; if the valve
does not open, replace switch.
Knocking Noise.
Possible defect in
safety valve.
Operate safety valve manually
by pulling on ring. If valve still
leaks, it should be replaced.
Defective check valve.
Have checked by a Trained
Service Technician.
Carbon build-
up in pump.
Have checked by a Trained
Service Technician.
Squealing sound.
Compressor pump
has no oil.
See
Pump
Oil-Checking
paragraph in the
Maintenance
section.
Air vent on dipstick
is blocked.
Air vent clogged
with debris.
Clean air vent or replace dipstick.
