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Troubleshooting Codes
CODE POSSIBLE CAUSE POSSIBLE SOLUTION
1 Unloader valve does not release pressure when air tank
reaches blow-off pressure
Unloader valve must be replaced. Contact a D
E
WALT factory
service center or a D
E
WALT authorized service center.
2 Fittings are not tight Tighten fittings where air can be heard escaping. Check fit-
tings with soapy water solution. DO NOT OVERTIGHTEN.
3 Defective unloader valve Turn off engine, rotate manual lock unloader lever to the
closed perpendicular position. If air leaks out of air tank
through unloader valve, replace unloader valve.
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
EWALT 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 Prolonged excessive use of air Decrease amount of air usage.
8 Compressor is not large enough for accessory Check the accessory air requirement. If it is higher than the
SCFM or pressure supplied by your air compressor, a larger
compressor is needed to operate accessory.
9 Hole in air hose Check and replace air hose, if required.
10 Unloader valve restricted Remove, clean or replace.
11 Unit operating in damp or humid conditions Move unit to a dry well ventilated area.
12 Restricted air intake filter Clean or replace air intake filter.
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