Troubleshooting Guide - DeVilbiss Air Power Company FA125 Manuel Du Propriétaire

PERFORMING REPAIRS MAY EXPOSE VOLTAGE SOURCES, MOVING PARTS OR COMPRESSED
AIR SOURCES. PERSONAL INJURY MAY OCCUR. PRIOR TO ATTEMPTING ANY REPAIRS,
UNPLUG THE COMPRESSOR AND BLEED OFF 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.
Pressure reading on the regu-
lated pressure gauge drops
when an accessory is used.

TROUBLESHOOTING GUIDE

CAUSE
Pressure switch does not shut off mo-
tor when compressor reaches "cut-
out" pressure.
Pressure '"cut-out" too high.
Tube fittings are not tight enough.
Defective or dirty check valve.
Defective pressure release valve.
Defective check valve.
Defective air tank.
It is normal for "some" pressure drop to
occur.
CORRECTION
Move the pressure switch lever to the "OFF" position.
If the outfit doesn't shut off, unplug. If the electrical
contacts are welded together, replace the pressure
switch.
Return the outfit to an authorized dealer to check and
adjust, or replace switch.
Tighten fittings where air can be heard escaping.
Check fittings with soapy water solution. 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. Remove
and clean or replace check valve. DO NOT OVER-
TIGHTEN.
Remove and replace the release valve.
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. Remove
and clean or replace check valve. DO NOT OVER-
TIGHTEN.
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.
If there is an excessive amount of pressure drop when
the accessory is used, adjust the regulator following
the instructions on page 6.
Adjust the regulated pressure under
flow conditions (while accessory is be-
ing used).
9 - ENG
NOTE