DeWalt D55146R Used, Under Features if pressure drop is excessive, While accessory is being used

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CODE	POSSIBLE CAUSE	POSSIBLE SOLUTION
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 DEWALT factory service center or a DEWALT
		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	It is normal for some pressure drop to occur when an acces-
	used	sory is used, adjust the regulator as instructed in Regulator
		under Features 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.
10	Hole in air hose	Replace air hose.
11	Check valve restricted	Remove, clean or replace.
12	Air leaks	Tighten fittings.
13	Regulator is damaged	Replace.
14	Unit operating in damp or humid conditions	Move unit to a dry well ventilated area
15	Restricted air intake filter	Clean or replace air intake filter
16	Carbon build-up in pump.	Contact a DEWALT factory service center or a DEWALT
		authorized service center.

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