18
TROUBLESHOOTING GUIDE
This section provides a list of the more frequently encountered malfunctions, their causes and corrective actions.
The operator or maintenance personnel can perform some corrective actions, and others may require the assistance
of a qualified DEWALT technician or your dealer.
Problem Code
Excessive air tank pressure-safety valve pops off 1,2
Air leaks 3
Air leaks in air tank or at air tank welds 4
Air leaks between head and valve plate 5
Air leaks from safety valve 6
Knocking Noise 6
Pressure reading on the regulated pressure gauge drops when an accessory is used 7
Compressor is not supplying enough air to operate accessories 8, 9, 10, 11, 12
Regulator knob has continuous air leak 13
Regulator will not shut off air outlet 13
Motor will not run 11, 14, 15, 16, 17,
18, 19, 20
CODE POSSIBLE CAUSE POSSIBLE SOLUTION
1
Pressure switch does not shut off
motor when compressor reaches cut-
out pressure
Set the On/Off switch to OFF (0), if the unit does not shut
off contact a D
E
WALT factory service center or a D
E
WALT
authorized service center.
2 Pressure switch cut-out too high
Contact a D
E
WALT factory service center or a D
E
WALT
authorized service center.
3 Tube fittings are not tight enough
Tighten fittings where air can be heard escaping. Check
fittings with soapy water solution. Do Not Overtighten.
4 Defective air tank
Air tank must be replaced. Do not repair the leak.
m WARNING: Risk of bursting. Do not drill into, weld or
otherwise modify air tank or it will weaken. The air tank
can rupture or explode.
repair agent by contacting your local DEWALT office at
the address indicated in this manual. Alternatively, a list
of authorised DEWALT repair agents and full details of
our after-sales service and contacts are available on the
Internet at: www.2helpU.com.
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