14
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
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 6,16,17
Pressure reading on the regulated pressure gauge drops when an accessory is used 7
Compressor is not supplying enough air to operate accessories 8,9,10,11,12,15
Regulator knob has continuous air leak 13
Regulator will not shut off air outlet 13
Moisture in pump crankcase 14,18
Motor will not run 11,19,20,21,22,
23,24,25,26
CODE POSSIBLE CAUSE POSSIBLE SOLUTION
1 Pressure switch does not shut off motor
when compressor reaches cut-out pres-
sure
Set the On/Off switch to OFF, if the unit does not shut off
contact a D
WALT factory service center or a D
WALT authorized
service center.
2 Pressure switch cut-out too high Contact a D
WALT factory service center or a D
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.
5 Leaking seals
Contact a D
WALT factory service center or a D
WALT authorized
service center.
6 Defective safety valve
Operate safety valve manually by pulling on ring. If valve still
leaks, it must be replaced.
7
Regulator is not adjusted correctly for
accessory being used
It is normal for some pressure drop to occur when an accessory
is used, adjust the regulator as instructed in Regulator under
Features if pressure drop is excessive.
NOTE: Adjust the regulated pressure under flow conditions while
accessory is being used.
8 Prolonged excessive use of air Decrease amount of air usage.
9
Compressor is not large enough for
accessory
Check the accessory air requirement. If it is higher than the
CFM or pressure supplied by your air compressor, a larger
compressor is needed to operate accessory.
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