18- ENG
N015840
TROUBLESHOOTING
Risk of Unsafe Operation. Unit cycles automatically when power is
on. When servicing, you may be exposed to voltage sources, compressed air, or
moving parts. Before servicing unit unplug or disconnect electrical supply to the air
compressor, bleed tank of pressure, and allow the air compressor to cool.
PROBLEM
CAUSE
CORRECTION
Excessive
tank pressure
- safety valve
pops off.
Pressure switch does not
shut off motor when
compressor reaches
"cut-out" pressure.
Move Auto/Off lever to the
"Off" position, if the outfit
does not shut off contact a
Trained Service Technician.
Pressure switch "cut-
out" too high.
Contact a Trained
Service Technician.
Air leaks at
fittings.
Tube fittings are not
tight enough.
Tighten fittings where air can
be heard escaping. Check
fittings with soapy water
solution.
Do Not Overtighten.
Air leaks
at or inside
check valve.
Check valve seat damaged.
A defective check valve results
in a constant air leak at the
pressure release valve when
there is pressure in the tank
and the compressor is shut
off. Replace check valve. Refer
to the
To Replace or Clean
Check Valve in the
Service
and Adjustmen
t section.
Air leaks at
pressure
switch release
valve.
Defective pressure
switch release valve.
Contact a Trained
Service Technician.
Air leaks in air
tank or at air
tank welds.
Defective air tank.
Air tank must be replaced.
Do not repair the leak.
Risk of
Bursting Do not drill into,
weld or otherwise modify air
tank or it will weaken. The
tank can rupture or explode.
Air leaks
between
head and
valve plate.
Leaking seal.
Contact a Trained
Service Technician.
