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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
Excessive tank
pressure - safet
valve pops off.
Air leaks at
fittings.
Air leaks at or
inside check
valve.
CAUSE
Pressure switch does not
shut off motor when
compressor
reaches
"cut-out"
pressure.
Pressure switch "cut-out"
too high.
Tube fittings are not tight
enough.
Check valve seat damaged.
Air leaks at
Defective pressure switch
pressure switch
release valve.
release valve.
Defective air tank.
Air leaks in air
tank or at air
tank welds.
CORRECTION
Move On/Auto/Off
lever to
the "OFF" position,
if the
unit does not shut off
contact a Trained Service
Technician.
Contact a Trained Service
Technician.
Tighten fittings where air can
be heard escaping. Check
fittings with soapy water
solution. Do Not
Overti_hten.
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
Adjustment"
section.
Contact a Trained Service
Technician.
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.
Contact a Trained Service
Technician.
Air leaks
Leaking seal.
between head
and valve plate.
21_ENG
D27312
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