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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 - safety
valve pops off.
Air leaks at
fittings.
Air leaks in air
tank or at air
tank welds.
Air leaks
between head
and valve plate.
Air leak from
safety valve.
Knocking Noise.
TROUBLESHOOTING
Risk of Unsafe Operation. Unit cycles automatically when
power is on. When servicing, you may be exposed to
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.
Defective air tank.
Leaking seal.
Possible defect in safety
valve.
Possible defect in safety
valve.
Move On/Auto/Off lever to
the "Off" position, if the
outfit 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
Overtighten.
Air tank must be replaced.
Do not repair the leak.
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.
Operate safety valve
manually by pulling on ring.
If valve still leaks, it should
be replaced.
Operate safety valve
manually by pulling on ring.
If valve still leaks, it should
be replaced.
19- ENG
CORRECTION
Risk of
Bursting
A09927
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