Makita MAC2400 - Manual (Page 15)

TROUBLESHOOTING GUIDE
15
OWNERS MANUAL
MAKITA - MAC700 / MAC2400 / MAC5200
TROUBLESHOOTING GUIDE
PERFORMING REPAIRS MAY EXPOSE VOLTAGE SOURCES, MOVING PARTS OR COM-
PRESSED AIR SOURCES. PERSONAL INJURY MAY OCCUR. PRIOR TO ATTEMPTING ANY
REPAIRS, UNPLUG THE COMPRESSOR AND BLEED OFF TANK AIR PRESSURE.
PROBLEM CAUSE CORRECTION
Excessive tank pressure -
safety valve pops off.
Air leaks at fittings.
Air leaks at or inside check
valve.
Air leaks at pressure switch
unloader valve.
Air leaks in air tank or at air
tank welds.
Air leaks between head and
valve plate.
Defective pressure switch.
Improper wiring.
Fittings are not tight enough.
Defective or dirty check valve.
Defective pressure switch
unloader valve, or defective
check valve.
Defective air tank.
Blown head gasket.
Move the pressure switch
lever to the "OFF" position. If
the unit doesn't shut off,
unplug. If the electrical
contacts are welded together,
replace the pressure switch.
If the contacts are good, check
to see if the pin in the pressure
release valve is stuck. If it
does not move freely, replace
the valve.
Adjust or replace pressure
switch.
Tighten fittings where air can
be heard escaping. Check
fittings with a soap and water
solution.
DO NOT OVER TIGHTEN.
A defective check valve results
in a constant air leak at the
pressure release valve where
there is a pressure in the tank
and the compressor is shut off.
Remove and clean or replace
check valve.
DO NOT OVER TIGHTEN.
Contact a trained service
technician.
Air tank must be replaced. Do
not repair the leak. WARNING
DO NOT DRILL INTO, WELD
OR OTHERWISE MODIFY
AIR TANK OR IT WILL
WEAKEN. THE TANK CAN
RUPTURE OR EXPLODE.
Replace gasket or contact
Authorized Service Technician.