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English
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
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 .................................................................................................................... 13
Knocking Noise .........................................................................................................................6, 13
Engine will not run .....................................................................................................................14, 15, 16, 21
Pressure reading on the regulated pressure gauge drops when an accessory is used ........... 17
Regulator knob has continuous air leak ....................................................................................18
Regulator will not shut off air outlet ..........................................................................................18
Pump will not run.......................................................................................................................19
Air tank pressure will not build ..................................................................................................19, 20
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