Troubleshooting Guide - DeWalt D55394 Instruction Manual

Contractor’s electric wheeled portable air compressor

Table of Contents

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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

Problem

Excessive air tank pressure-safety valve pops off ......................................................................1

Air leaks .................................................................................................................................... 2

Continuous air leak at unloader valve. ....................................................................................... 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

Compressor is not supplying enough air to operate accessories.............................................. 2,7,8,9,10,12,13

Restricted air intake. .................................................................................................................. 12

Excessive vibration .................................................................................................................... 14

Knocking noise .......................................................................................................................... 3,6,13,14,16,17,18,19

Excessive belt wear ................................................................................................................... 13,14,16,19,20

Squealing sound ........................................................................................................................ 13,23

Motor will not run ....................................................................................................................... 15,21,22,32,34,35,36

Pressure reading on the regulated pressure gauge drops when an accessory is used ........... 24

Regulator knob has continuous air leak .................................................................................... 25

Regulator will not shut off air outlet ........................................................................................... 25

Moisture in pump crankcase ...................................................................................................... 2, 5,11, 26,27,28,29,30,31

Pump will not run ....................................................................................................................... 32

Air tank pressure will not build ................................................................................................... 32,33