Troubleshooting Guide; Troubleshooting Codes - DeWalt DWFP55126 Guide D'utilisation

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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 WALT technician or your dealer.
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Code Possible Cause
Pressure switch does not shut off
1 motor when compressor reaches
cut-out pressure.
2 Pressure switch cut-out too high.
Tube fittings are not tight enough.
3
Defective air tank.
4
5 Leaking seals.
6 Defective safety valve.
Regulator is not adjusted correctly for
accessory being used.
7
8 Prolonged excessive use of air.
Compressor is not large enough
9
for accessory.
11 Check valve restricted.
12 Air leaks.
13 Regulator is damaged.
Motor overload protection switch
14
has tripped.
Tank pressure exceeds pressure switch
15
cut-in pressure.
16 Loose electrical connections.
17 Possible defective motor.
Paint spray on internal motor parts.
18
Pump does not run because tank
19
pressure is above cut-in pressure.
20 Pump does not run due to safety fault.

Troubleshooting Codes

Problem
Excessive air tank pressure-safety valve pops off
Air leaks
Air leaks in air tank or at air tank welds
Air leaks between head and valve plate
Air leaks from safety valve
Compressor is not supplying enough air to operate accessories
Regulator knob has continuous air leak
Regulator will not shut off air outlet
Motor will not run
10

Troubleshooting Guide

Set the Auto On/Off switch to "Off" and unplug unit, if the unit does not shut off contact a D
factory service center or a D WALT authorized service center.
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Contact a D WALT factory service center or a D
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Tighten fittings where air can be heard escaping. Check fittings with soapy water solution. Do
Not Overtighten.
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.
Contact a D WALT factory service center or a D
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Operate safety valve manually by pulling on ring. If valve still leaks, it must be replaced.
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 Operation if pressure drop is excessive.
NOTE: Adjust the regulated pressure under flow conditions while accessory is being used.
Decrease amount of air usage.
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.
Contact a D WALT factory service center or a D
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Tighten fittings.
Replace.
Refer to Motor Overload Protector under Description of Operation. If motor overload protection
trips frequently, contact a D WALT factory service center or a D
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Motor will start automatically when tank pressure drops below cut-in pressure of pressure switch.
Contact a D WALT factory service center or a D
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Contact a D WALT factory service center or a D
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Contact a D WALT factory service center or a D
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compressor in the paint spray area. Refer to DANGER: RISK OF EXPLOSION OR FIRE.
Drain tank to below cut-in pressure when pump turns on.
Cycle On/Off Switch from "Off" to "On."
Code
1, 2
3
4
5
6
7, 8, 9, 10, 11, 12
13
13
6, 14, 15, 16, 17, 18, 19, 20
Possible solution
WALT authorized service center.
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WALT authorized service center.
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WALT authorized service center.
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WALT authorized service center.
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WALT authorized service center.
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WALT authorized service center.
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WALT authorized service center. Do not operate the
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WALT
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