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Performing repairs may expose voltage sources, moving
parts or compressed air sources, moving parts or
compressed air sources. Personal injury may occur. Prior to attempting
any repairs, unplug the air compressor and bleed off all air tank air
pressure.
PROBLEM
Pressure switch does
Excessive tank
not shut off motor when
pressure - safety
compressor reaches "cut-
valve pops off.
out" pressure.
Pressure switch "cut-out"
too high.
Air leaks at
Tube fittings are not tight
fittings.
enough.
Check valve seat damaged.
Air leaks at or
inside check
valve.
Defective pressure switch
Air leaks at
release valve.
pressure switch
release valve.
Defective air tank.
Air leaks in air
tank or at air
tank welds.
Air leaks
Leaking seal.
between head
and valve plate.
TROUBLESHOOTING
CAUSE
21 - ENG
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
Overtighten.
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 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.
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.
A14123