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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 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, 22

Regulator knob has continuous air leak

13

Regulator will not shut off air outlet

13

Motor will not run

6, 14, 15, 16, 17, 18, 19, 20

Squealing Sound

21

 

Troubleshooting Codes

 

Code

possible cause

POSSIBLE SOLUTION

 

1

Pressure switch does not shut off motor when

Set the Auto/Off switch to OFF, if the unit does not shut off contact

 

compressor reaches cut-out pressure

a DeWALT factory service center or a DeWALT authorized service

 

 

center.

 

2

Pressure switch cut-out too high

Contact a DeWALT factory service center or a DeWALT 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.

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DeWalt D55167 Troubleshooting Guide, Troubleshooting Codes, Problem Code, Code Possible cause, Possible Solution