Use and Care Manual

ENGLISH
13
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.
Code Possible Cause Possible Solution
1
Pressure switch does not shut off
motor when compressor reaches cut-
out pressure
Set the Auto On/Off switch to "Off" and remove the batttery, 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.
4
Defective air tank Air tank must be replaced. Do not repair the leak.

WARNING: Risk of bursting. Do not drill into, weld or otherwise modify
air tank or it will weaken. The air tank can rupture orexplode.
5
Leaking seals Contact a D
e
WALT factory service center or a D
e
WALT authorized service center.
6
Defective safety valve Operate safety valve manually by pulling on ring. If valve still leaks, it must be replaced.
7
Regulator is not adjusted correctly for
accessory being used
It is normal for some pressure drop to occur when an accessory is used, adjust the regulator as
instructed in One-turn Regulator under Description of Operations if pressure drop is excessive.
NOTE: Adjust the regulated pressure under flow conditions while accessory is being used.
8 Prolonged excessive use of air Decrease amount of air usage.
9
Compressor is not large enough for
accessory
Check the accessory air requirement. If it is higher than the CFM or pressure supplied by your air
compressor, a larger compressor is needed to operate accessory.
11 Check valve restricted Contact a D
e
WALT factory service center or a D
e
WALT authorized service center.
12 Air leaks Tighten fittings.
13
Regulator is damaged Replace.
14
Motor overload protection switch has
tripped
Refer to Motor Overload Protector under Description of Operations. If motor overload protection
trips frequently, contact a D
e
WALT factory service center or a D
e
WALT authorized service center.
15
Tank pressure exceeds pressure switch
cut-in pressure
Motor will start automatically when tank pressure drops below cut-in pressure of pressure switch.
16
Loose electrical connections Contact a D
e
WALT factory service center or a D
e
WALT authorized service center.
17
Possible defective motor Contact a D
e
WALT factory service center or a D
e
WALT authorized service center.
18
Paint spray on internal motor parts Contact a D
e
WALT factory service center or a D
e
WALT authorized service center. Do not operate the
compressor in the paint spray area. See flammable vapor warning.
19
Pump does not run because tank
pressure is above cut-in pressure.
Drain tank to below cut-in pressure when pump turns on.
20
Pump does not run due to safety fault. Cycle Auto On/Off Switch from "Off" to "Auto On."
Troubleshooting Codes
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
Compressor is not supplying enough air to operate accessories 7, 8, 9, 10, 11, 12
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