Troubleshooting Guide - Makita MAC500 Owner's Manual

TROUBLESHOOTING GUIDE
PERFORMING REPAIRS MAY EXPOSEVOLTAGE SOURCES, MOVING PARTS OR COMPRESSED
AIR SOURCES. PERSONAL INJURY MAY OCCUR. PRIOR TO ATTEMPTING ANY REPAIRS,
UNPLUG THE COMPRESSOR AND BLEED OFFTANK AIR PRESSURE.
PROBLEM
Excessive tank pressure
-
safely 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 drop!
when an accessory is used.
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 or dirty check valve.
Defective pressure switch 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.
f the unit doesn't shut
off,
and the electrical contacts
ore welded together, replace the pressure
switch.
If the contacts are
good,
check to see
if
the pin in the
mttom
of the pressure release valve is
stuck.. If it
joes not move freely, replace the valve.
2etum the unit to an authorized dealer to check and
adjust, or replace switch.
fighten fittings where air can be heard escaping.
:heck fittings
with
soapy water solution.
DO NOT
3VER-TIGHIEN.
~~ ~ ~ ~ ~~ ~
9
defective check valve results in a constant air leak
a t the pressure release valve where there is pressure
n the tank and the compressor is shut off. Remove
and clean or replace check valve.
DO NOT OVER-
f f i m .
Remove and replace the release valve.
9
defective check valve results in a constant
air
leak
nt the pressure release valve when there
is
pressure
n the tank and the compressor is shut
off.
Remove
nnd clean or replace check valve. DO
NOT OVER-
n G m .
Air tank must
be
replaced. Do not repair the leak.
DO NOT DRILL INTO, WELD OR OTHERWE
MODIFY AIRTANKOR ITWlLLWEAKEN.THE
TANKCAN
RUPTUREOREXPLODE.
If
there
is
an excessive amount of pressure drop
when the accessory
i s
used, adjust the regulator
following the instructions on page
8.
NOTE
Adjust the regulated pressure under
flow
conditions (while accessory is being used).