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22-ENGA18791
TROUBLESHOOTING
Performing repairs may expose voltage 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
CAUSE
CORRECTION
Pressure switch does not
shut off motor when com-
pressor reaches "cut-out"
pressure.
Pressure switch "cut-out"
too high.
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.
Excessive
tank pressure
- safety valve
pops off.
Tube fittings are not tight
enough.
Tighten fittings where air can
be heard escaping. Check fit-
tings with soapy water solu-
tion. DO NOT OVER TIGHTEN.
Air leaks at
fittings.
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.
Do not drill
into, weld or
otherwise modify air tank
or it will weaken. The tank
can rupture or explode.
Air leaks be-
tween head and
valve plate.
Leaking seal.
Contact a Trained Service
Technician.
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 the "To Replace
or Clean Check Valve" in the
Service and Adjustments
section.