DeWalt D55166 Instruction Manual page 14

English
Troubleshooting Codes
CODE POssiBlE CAUsE
1 Pressure switch does not shut off
motor when compressor reaches
cut-out pressure
2 Pressure switch cut-out too high
3 Tube fittings are not tight enough Tighten fittings where air can be heard escaping. Check fittings with soapy
4 Defective air tank
5 Leaking seals
6 Defective safety valve
7 Regulator is not adjusted correctly
for accessory being used
8 Prolonged excessive use of air
9 Compressor is not large enough
for accessory
10 Hole in air hose
11 Check valve restricted
12 Air leaks
13 Regulator is damaged
14 Motor overload protection switch
has tripped
15 Tank pressure exceeds pressure
switch cut-in pressure
16 Extension cord is wrong length
or gauge
17 Loose electrical connections
18 Possible defective motor
19 Paint spray on internal motor
parts
20 Fuse blown, circuit breaker
tripped
12
POssiBlE sOlUTiOn
Set the Auto/Off switch to OFF, 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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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
e
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 Regulator under Features 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.
Replace air hose.
Contact a D WALT factory service center or a D
e
Tighten fittings.
Replace.
Refer to Motor Overload Protection under Features. If motor overload
protection trips frequently, contact a D
D WALT authorized service center.
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Motor will start automatically when tank pressure drops below cut-in pressure
of pressure switch.
Check for proper gauge wire and cord length. Refer to the Extension Cords
paragraph in the Installation section.
Contact a D WALT factory service center or a D
e
Contact a D WALT factory service center or a D
e
Contact a D WALT factory service center or a D
e
center. Do not operate the compressor in the paint spray area. See flammable
vapor warning.
Check fuse box for blown fuse and replace as necessary. Reset circuit breaker.
Do not use a fuse or circuit breaker with higher rating than that specified for
our particular branch circuit.
Check for proper fuse. You should use a time delay fuse.
Check for low voltage conditions and/or proper extension cord.
Disconnect the other electrical appliances from circuit or operate the
compressor on its own branch circuit.
WALT authorized service center.
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WALT authorized service center.
e
WALT authorized service center.
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WALT factory service center or a
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WALT authorized service center.
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WALT authorized service center.
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WALT authorized service
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WALT
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