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CODE
POSSIBLE CAUSE
1
Unloader valve does not release pressure when
air tank reaches blow-off pressure
2
Fittings are not tight
3
Defective unloader valve
4
Defective air tank
5
Leaking seals
6
Defective safety valve
7
Prolonged excessive use of air
8
Compressor is not large enough for accessory
9
Hole in air hose
10
Unloader valve restricted
11
Unit operating in damp or humid conditions
12
Restricted air intake filter
Troubleshooting Codes
POSSIBLE SOLUTION
Unloader valve must be replaced. Contact a D
center or a D
WALT authorized service center.
e
Tighten fittings where air can be heard escaping. Check fittings with
soapy water solution. DO NOT OVERTIGHTEN.
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.
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
e
service center.
Operate safety valve manually by pulling on ring. If valve still leaks, it
must be replaced.
Decrease amount of air usage.
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.
Check and replace air hose, if required.
Remove, clean or replace.
Move unit to a dry well ventilated area.
Clean or replace air intake filter.
25
WALT factory service
e
WALT authorized
e
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