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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 D
EWALT 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
Troubleshooting Codes
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, 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.