DeWalt D55151 - Troubleshooting Guide; Common Problems and Causes; Troubleshooting Codes and Solutions

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 .......................................................................................................................... 6,16,17
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
Troubleshooting Codes
CODE POSSIBLE CAUSE POSSIBLE SOLUTION
Pressure switch does not Shut off moto[ when compressor set the On/Off switch to OFF, if the unit does not ShUt
reaches Cut_out pressure off c0ntact a DEWALT faCt0rY Seiv!Ce center 0r a DEWALT
authorized service center.
2 Pressure switch cut-out too high Contact a DEWALT factory service center or a DEWALT
authorized service center.
19