Troubleshooting Guide - DeVilbiss Air Power Company Ex-Cell E7540 Manual De Operación

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
Excessive
tank pressure
- safety valve
pops off.
Air leaks at
fittings.
Air leaks at or
inside check
valve.
Air leaks at
pressure switch
release valve.
Air leaks in air
tank or at air
tank welds.
Air leaks be-
tween head and
valve plate.
A18791
TROUBLESHOOTING
CAUSE
Pressure switch does not
shut off motor when com-
pressor reaches "cut-out"
pressure.
Pressure switch "cut-out"
too high.
Tube fittings are not tight
enough.
Check valve seat damaged.
Defective pressure switch
release valve.
Defective air tank.
Leaking seal.
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 fit-
tings with soapy water solu-
tion. DO NOT OVER TIGHTEN.
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.
Contact a Trained Service
Technician.
Air tank must be replaced.
Do not repair the leak.
otherwise modify air tank
or it will weaken. The tank
can rupture or explode.
Contact a Trained Service
Technician.
22-ENG
CORRECTION
Do not drill
into, weld or