D55143 Heavy Duty Electric 3 Gallon Oil Free Hand Carry Air Compressor
Compresseur à air électrique D55143, portable, à usage intensif, d’une capacité de
3 gallons, sans huile
D55143 Compresor eléctrico portátil de aire para trabajos pesados de 3 galones que
no requiere aceite
Questions? See us on the World Wide Web at www.dewalt.com
INSTRUCTIVO DE OPERACIÓN, CENTROS DE SERVICIO Y PÓLIZA
DE GARANTÍA. ADVERTENCIA: LÉASE ESTE INSTRUCTIVO ANTES
DE USAR EL PRODUCTO.
INSTRUCTION MANUAL
GUIDE D'UTILISATION
MANUAL DE INSTRUCCIONES
English
SPECIFICATIONS
Model D55143
Weight 60 lbs. (27,2 kg)
Height 14.25 in. (362 mm)
Width 18 in. (457 mm)
Length 19.5 in. (495 mm)
Motor 4-pole induction
120 V
60 Hz
12.5 amps
CFM/PSI 3.7@40
(M3/MIN/BAR) (0,1036 à 2,758)
3.4@60
(0,0952 à 4,137)
2.8@90
(0,0784 à 6,206)
2.6@100
(
0,0728 à 6,895)
J
C
I
B
A. Tank pressure gauge
B. On/Off lever
C. Pressure switch
D. Regulated pressure gauge
E. Pressure regulator knob
F. Couplers
G. Motor reset switch
H. Drain valves
I. Safety relief valve
J. Cord wrap
D
E
A
F
G
FIG. 1 FIG. 2
FIG. 3 FIG. 4
H
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IF YOU HAVE ANY QUESTIONS OR COMMENTS ABOUT THIS
OR ANY D
EWALT TOOL, CALL US TOLL FREE AT
1-800-4-D
EWALT (1-800-433-9258).
Safety Instructions
WARNING! Read and understand all instructions before
operating this compressor. Failure to follow all instructions
listed below may result in electric shock, fire and/or serious personal injury.
SAVE THESE INSTRUCTIONS
WARNING: Some dust created by this product contains chemi-
cals known to the State of California to cause cancer, birth defects
or other reproductive harm. Some examples of these chemicals
are:
• compounds in fertilizers
• compounds in insecticides, herbicides and pesticides
• arsenic and chromium from chemically treated lumber
To reduce your exposure to these chemicals, wear approved safety
equipment such as dust masks that are specially designed to filter
out microscopic particles.
WARNING: Use of this product will expose you to chemicals
known to the State of California to cause cancer, birth defects and
other reproductive harm. Avoid inhaling vapors and dust, and
wash hands after using.
WARNING: This product contains chemicals, including lead,
known to the State of California to cause cancer, and birth defects
or other reproductive harm. Wash hands after handling.
The user of the air compressor must understand these instructions.
Each person operating the air compressor must be of sound mind
and body and must not be under the influence of any substance
which might impair vision, dexterity, or judgement.
AIR TANK
The tank on your Air Compressor is designed and
may be UM coded (for units with tanks greater than
6 inch diameter) according to ASME Section VIII,
Div. 1 rules. All pressure vessels must be inspected once every two years. To find your state pressure vessel inspector, look under the Division of
Labor and Industries in the government section of
a phone book or call 1-800-4-D
E
WALT for assistance.
The following conditions could lead to a weakening of the tank, and
result in a violent tank explosion:
1. Failure to properly drain condensed water from the tank, causing rust and thinning of the steel tank. Drain tank daily or after
each use. If tank develops a leak, replace it immediately with a
new tank or new compressor outfit.
2. Modifications or attempted repairs to the compressor tank.
Never drill into, weld, or make any modifications to the tank or
its attachments.
3. Modifications of the pressure switch, safety valve, or any
other components that control tank pressure. The tank is
designed to withstand specific operating pressures. Never
make adjustments or substitute parts to alter the factory set
operating pressures.
ATTACHMENTS AND ACCESSORIES
Exceeding the pressure rating of air tools, spray
guns, air operated accessories, tires, hoses
and other inflatables can cause them to explode
or fly apart, resulting in serious injury. Follow the
equipment manufacturers recommendation and
never exceed the maximum allowable pressure
rating of attachments. Never use the compressor to inflate small, low-pressure objects such
as children’s toys, footballs, basketballs, etc.
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RISK OF EXPLOSION OR FIRE
It is normal for electrical contacts within the motor
and pressure switch to spark. Always operate the
compressor in a well-ventilated area free of combustible materials, gasoline or solvent vapors. If
electrical sparks from compressor come into contact with flammable vapors, they may ignite, causing fire or explosion. When spraying flammable
materials, locate compressor at least 20 feet (6m) upwind from
spray area. An additional length of hose may be required.
Store flammable materials in a secure location away from the compressor.
Restricting any of the compressor ventilation openings will cause
serious overheating and could cause fire. Never place objects
against or on top of compressor. Operate the compressor in an
open area at least 3 feet (1m) away from any wall or obstruction
that would restrict the flow of fresh air to the ventilation openings.
RISK OF ELECTRICAL SHOCK
Your air compressor is powered by electricity. If it is
not used properly it could cause electric shock.
Never operate the compressor outdoors when it is
raining or in wet conditions.
Never operate compressor with guards or protective covers that are damaged or removed. Repairs
by anyone other than qualified personnel can result
in serous injury or death by electrocution. Any electrical wiring or
repairs required on this product should be performed by authorized
service center personnel in accordance with national and local
electrical codes.
GROUNDING INSTRUCTIONS
In the event of a malfunction or breakdown, grounding provides a
path of least resistance for electric current to reduce the risk of elec-
tric shock. This tool is equipped with an electric cord having an
equipment-grounding conductor and grounding plug. The plug
must be plugged into a matching outlet that is properly installed and
grounded in accordance with all local codes and ordinances. Do
not modify plug provided: if it will not fit the outlet, have the proper
outlet installed by a qualified electrician.
Improper connection of the equipment-grounding conductor can
result in a risk of electric shock. The conductor with insulation having an outer surface that is green with or without yellow stripes is
the equipment-grounding conductor. If repair or replacement of the
electric cord or plug is necessary do not connect the equipmentgrounding conductor to a live terminal.
If the
Grounding Instructions are not completely understood or if
in doubt as to whether the tool is properly grounded, check with a
qualified electrician or service personnel.
Use only three-wire extension cords that have three-prong grounding plugs and three-pole receptacles to avoid overheating.
THE USE OF A GFCI OUTLET IS RECOMMENDED AND MAY
BE REQUIRED IN CERTAIN AREAS.
Grounded tools intended for use on a supply circuit having a nominal rating less than 150 volts: This tool is intended for use on a circuit that has an outlet that looks like the one illustrated in Figure K.
The tool has a grounding plug that looks like the plug illustrated in
Figure K. Atemporary adapter, which looks like the adapter illustrated in Figures L and M, may be used to connect this plug to a 2-pole
receptacle as shown in Figure K if a properly grounded outlet is not
available. The temporary adapter should be used only until a properly grounded outlet can be installed by a qualified electrician. The
green-colored rigid ear, lug, and the like, extending from the
adapter must be connected to a permanent ground such as a properly grounded outlet box.
The adapter (M) is not for use in Canada.
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DEWALT does not recommend the use of extension cords for
any air compressor.
This can create power loss and overheating
of the motor. Use an additional air hose rather than an extension
cord. If use of an extension cord is unavoidable, it should be
plugged into a GFCI found in circuit boxes or protected receptacles.
When using an extension cord, observe the following.
REPAIR OR REPLACE DAMAGED OR WORN CORDS
IMMEDIATELY.
RISK FROM FLYING OBJECTS
The compressed air stream can cause soft tissue damage to
exposed skin and can propel dirt, chips, loose particles and small
objects at high speed, resulting in serious injury. Always wear ANSI
Z87.1 approved safety glasses with side shields when using the
compressor. Never direct air stream at people or animals. Use only
OSHA approved air blow guns.
Extension Cord Chart
Motor
Rating Length of Cord in Feet
25' (7.6m) 50' (15.2m) 100' (30.5m)
12 amp, 120V 14 Ga. 12 Ga. 10 Ga.
Motor
Rating Length of Cord in Feet
25' (7.6m) 50' (15.2m) 100' (30.5m)
15 amp, 120V 14 Ga. 12 Ga. 8 Ga.
KLM
GROUNDING PIN
GROUNDED
OUTLET
BOX
GROUNDING
MEANS
ADAPTER
RISK TO BREATHING
The compressed air from your compressor is not safe
for breathing! The air stream may contain carbon
monoxide, toxic vapors or solid particles. Never
inhale air from the compressor either directly or from
a breathing device connected to the compressor.
Sprayed materials such as paint, paint solvents, paint remover,
insecticides, weed killers, etc. contain harmful vapors and poisons.
NOTE: Operate air compressor only in a well ventilated area. Read
and follow the safety instructions provided on the label or safety
data sheets for the material you are spraying. Use a NIOSH/OSHA
approved respirator designed for use with specific application.
RISK FROM MOVING PARTS
The compressor cycles automatically when the
pressure switch is in the ON position. Always turn
off the compressor, bleed pressure from the air
hose and tank, and disconnect from power
source before performing maintenance or attaching tools and accessories.
Keep your hair, clothing and gloves away from moving parts.
Loose clothes, jewelry or long hair can be caught in moving parts.
Air vents may cover moving parts and should be avoided as well.
Do not remove the protective covers from this product. Never operate compressor with guards or protective covers that are damaged
or removed.
RISK OF BURNS (FIG. 5)
Touching exposed metal such as the compressor
head or aftercooler can result in serious burns. Never
touch any exposed metal parts on compressor during
or immediately after operation. Compressor will
remain hot for several minutes after operation. Do not
move the compressor while it is running. Hot motor
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parts could cause burns contributing to the dropping of the compressor, damaging the compressor and/or injuring the operator.
RISK FROM NOISE
CAUTION: Wear appropriate personal hearing
protection during use. Under some conditions and
duration of use, noise from this product may contribute
to hearing loss.
Introduction
Congratulations on the purchase of your new DEWALT Air
Compressor! This compressor requires no oil. Now you can enjoy all
the benefits of having an air compressor without ever having to purchase, add or change oil.
By reading the following simple safety, installation, operation, maintenance and troubleshooting steps described in this manual, you
will receive years of trouble-free operation.
HOT SURFACES
AFTERCOOLER
FIG. 5
CHECK
VALV E
PUMP
HEAD
VIEW FROM
COMPRESSOR
UNDERSIDE
Inspection of Compressor
Inspect for signs of obvious or concealed freight damage. Report
any damage to the delivering freight carrier immediately. Be sure
that all damaged parts are replaced and any mechanical problems
are corrected prior to the operation of the air compressor. Please
write the serial number in the space provided under the Service
section of this manual for future reference.
WARNING: When using electric tools, basic safety precautions
should always be followed to reduce risk of fire, electric shock and
personal injury.
DEWALT Air Compressor Features
PRESSURE SWITCH
This pressure switch (C) is used to start or
stop the air compressor. Moving the lever
(B) to the ON position will provide automatic power to the pressure switch which
will allow the motor to start when the air
tank pressure is below the factory set
cut-in pressure. When in the ON position,
the pressure switch stops the compressor
from charging air when the air tank pressure reaches the factory set
cut-out pressure limit. For ease of starting, this switch also has an
unloader valve located on the side of the switch designed to automatically release compressed air from the air compressor pump
head and its discharge line when the air compressor reaches the
cut-out pressure limit or is shut off. Moving the lever to the OFF
position will open the pressure switch contacts and stop the air
compressor.
SAFETY RELIEF VALVE (FIG. 6)
This valve (I) is designed to prevent system failures by relieving
pressure from the system when the compressed air reaches a
predetermined level. The valve is preset by the manufacturer and
must not be modified in any way.
C
I
B
FIG. 6
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AIR TANK DRAIN VALVES (FIG. 3)
The drain valves (H) are used to remove compressed air, moisture
and debris from the air tank after the air compressor is shut off.
MOTOR THERMAL OVERLOAD
The electric motor has a manual motor reset switch (G). If the motor
overheats for any reason, the motor reset switch will cut off power,
thus preventing the motor from being damaged. Turn the pressure
switch lever to the OFF position and wait until the motor cools before
pressing the motor reset switch.
AIR INTAKE FILTER
CAUTION: Do not operate without the air intake filter.
This filter (N) is designed to clean air entering the pump. To ensure
the pump continually receives a clean, cool and dry air supply this
filter must always be clean and the filter intake must be free from
obstructions.
TANK PRESSURE GAUGE (FIG. 1)
The tank pressure gauge (A) indicates air pressure in the air tank.
N
G
N
FIG. 7
REGULATED PRESSURE GAUGE (FIG. 1)
The regulated pressure gauge (D) indicates the air pressure available at the outlet side of the regulator. This pressure is controlled
by the regulator and is always less than or equal to the air tank
pressure.
PRESSURE REGULATOR KNOB (FIG. 1)
The pressure regulator knob (E) controls the air pressure coming
from the air tank.
Common Procedures
CHECKING SAFETY RELIEF VALVE OPERATION
WARNING: Aftercooler, pump head and surrounding parts are
very hot. Do not touch (see Hot Surfaces, Fig. 5).
1. Ensure that the On/Off lever on the pressure switch is in the
OFF position.
2. Ensure that the tanks are empty by looking at the tank pressure
gauge. Drain the tanks if necessary.
3. Grasp the wire ring on the safety relief valve (I) as shown in
Figure 6.
4. Pull and release the ring a few times to ensure that the plunger
moves in and out. Replace the safety relief valve if plunger
does not move or is difficult to move.
CHECKING AIR FILTER ELEMENT
WARNING: Aftercooler, pump head and surrounding parts are
very hot. Do not touch (see Hot Surfaces, Fig. 5)
.
1. Ensure that the On/Off lever on the pressure switch is in the
OFF position.
2. Allow the unit to cool.
3. Depress detent pins on filter cover to remove.
4. Remove air filter element.
5. To clean the filter element, blow out with air. Replace air filter
element if unsure.
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6. Reinsert filter element.
7. Replace filter cover and ensure detent pins snap into slots.
TURNING THE UNIT ON
See Pre-Start and Start-Up under Operating Procedures.
TURNING THE UNIT OFF
See Shut-Down under Operating Procedures.
ADJUSTING THE REGULATOR (FIG. 1)
NOTE: When reducing from a higher to a lower setting, first
reduce to a pressure less than that desired, then bring it up to the
desired pressure. Depending on the air requirements of each particular accessory, the outlet regulated air pressure may have to be
adjusted while operating the accessory.
1. Pull the pressure regulator knob (E) out.
2. Turn the knob clockwise to increase regulated pressure and
counterclockwise to decrease regulated pressure.
3. When desired pressure is shown on the regulated pressure
gauge (D), push the knob in to lock it.
INSTALLING HOSES
WARNING: Firmly grasp the hose when installing or discon-
necting to prevent hose whip.
1. Ensure that the regulated pressure gauge reads 0 PSI.
2. Grasp the hose at the coupler.
3. Pull back the collar on the female quick-connect coupler located
on the compressor.
4. Push the male connector into the female connector.
5. Release the female connector.
6. Grasp hose and pull to ensure couplers are seated.
7. Adjust regulator to desired pressure.
DISCONNECTING HOSES
WARNING: Firmly grasp the hose when installing or discon-
necting to prevent hose whip.
1. Ensure that the regulated pressure gauge reads 0 PSI.
2. Grasp the hose at the coupler.
3. Pull back the collar on female quick-connect coupler located on
the compressor.
4. Pull the male connector out of the female connector.
5. Release the female connector.
DRAINING THE TANKS
WARNING: The tanks contain high pressure air. Keep the outlet
of drain away from face and other body parts. Use safety glasses
when draining because debris can be kicked up into face. Use ear
and breathing protection when draining.
NOTE: All compressed air systems generate condensate that
accumulates in any drain point (e.g., tanks, filter, aftercoolers,
dryers). This condensate could contain substances which may be
regulated and must be disposed of in accordance with local, state
and federal laws and regulations.
1. Ensure that the On/Off lever on the pressure switch is in the
OFF position.
2. Move the compressor into an inclined position so that the drain
valve(s) are at the lowest point. This will assist in removing
moisture, dirt, etc., from the tanks.
3. Place a suitable container under the drain to catch discharge.
4. Open the drain valve from below, keeping hands away from hot
surfaces.
5. Slowly rotate the drain valve lever counterclockwise to gradually bleed air from tank.
6. When tank is at 10 PSI, rotate the drain valve lever to the
fully open position.
7. Close the drain valve(s) when finished.
Compatibility
Always use an air line filter to remove moisture or debris when
spraying paint.
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Location
All hand carry compressors should be run with the rubber feet resting on a horizontal, flat surface. Do not stand or step on this air
compressor. Secure compressor if it is located on an incline or at
high levels.
Place the air compressor at least 3 feet (1m) away from obstacles
that may prevent proper ventilation. Keep the compressor away
from areas that have dirt and/or volatile fumes in the atmosphere.
These impurities may clog the intake filter and valves, causing
inefficient operation.
HUMID AREAS
Excessive moisture is likely to occur if the unit is located in an
unheated area that is subject to large temperature changes. A sign
of excessive humidity is a large amount of water in the air tanks.
This extra water will make the compressor cycle on and off more
frequently due to reduced air capacity in the tanks. You may be able
to prevent moisture from forming by increasing ventilation or operating for longer intervals.
ELECTRICAL
Refer to the safety instructions at the beginning of this manual
before using unit. Observe extension cord safety instructions if necessary. Always shut off the air compressor switch before removing
the plug from the outlet.
NOISE CONSIDERATIONS
Consult local officials for information regarding acceptable noise
levels in your area. To reduce excessive noise, use vibration
mounts or silencers, relocate the unit or construct total enclosures
or baffle walls. Contact a D
EWALT service center or call 1-800-4-
D
EWALT for assistance.
TRANSPORTING
When transporting the compressor in a vehicle, trailer, etc., ensure
that the tanks are drained and the unit is secured. Use care when
driving to avoid tipping the unit over in the vehicle. Damage can
occur to the compressor or surrounding items if the compressor is
tipped.
MOVING
WARNING:
• Perspiration, greasy hands, gloves, etc., may result in loss of
control when carrying compressor.
• Ensure proper footing and use caution when carrying compressor to avoid a loss of balance.
• Do not drag air compressor by its power cord as this may result
in electric shock or damage to the compressor.
• Do not drag air compressor by air hose as this may cause hose
to disconnect creating hose whip or loose component(s) to be
discharged which may result in personal injury.
When moving the compressor, use
the cord wrap to keep the cord in
place. Grasp the handle bars (O) with
each hand or grasp the single bar (P)
to carry the compressor. Carry the
compressor as close to your body as
possible. Due to its weight it may be
desirable to seek assistance in carrying this air compressor.
General Requirements
The piping, fittings, receiver tank, etc., must be certified safe for at
least five times the maximum working pressure of the unit. Use
hard welded or threaded steel or copper pipes, cast iron fittings and
hoses that are five times the maximum working pressure and temperature. Use pipe thread sealant on all threads and tighten joints
thoroughly to prevent air leaks. DO NOT USE PVC PLASTIC.
O
FIG. 9
P
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CONDENSATE DISCHARGE PIPING
To install a condensate discharge line, use piping at least one size
larger than the connection. Connect the piping so that it is secured
tightly and is routed to a suitable drain point. Use as short and
direct a pipe as possible. Condensate must be disposed of in
accordance with local, state, and federal laws and regulations.
NOTE: All compressed air systems generate condensate that
accumulates in any drain point (e.g., tanks, filter, aftercoolers and
dryers). This condensate may contain substances which may be
regulated and must be disposed of in accordance with local, state
and federal laws and regulations.
Operating Procedures
PRE-START CHECKLIST
1. Ensure that the On/Off lever on the pressure switch is in the
OFF position.
2. Ensure that both tanks are drained so that moisture, dirt, etc.,
can be eliminated.
3. Ensure that the tank pressure gauge reads 0 PSI.
4. Ensure that the safety and drain valves are functioning properly.
5. Ensure that the drain valves are closed.
6. Ensure that all guards and covers are in place and securely
mounted. Ensure that all labels are legible. Do not use the compressor until all of these items have been verified.
START-UP
1. Ensure that the On/Off lever on the pressure switch is in the
OFF position.
2. Pull out and turn the regulator knob counterclockwise until it is
fully closed. Push in to lock. The regulated pressure gauge
should read 0 PSI.
3. Remove the power cord from the cord wrap and plug into a
grounded outlet.
4. Move the On/Off lever to the ON position. Allow the compressor to reach cut-out pressure limit. This pressure will cause the
compressor to shut down automatically.
NOTE: When the compressor is started and the tank is empty, an
air noise will be heard. This noise is normal as the unloader valve,
located in the pressure switch, is allowing air to escape from the air
compressor lines. This noise will also be heard when the unit shuts
off because the unloader valve is purging air from the lines.
5. Attach the hose and accessory.
6. Adjust the regulator to the desired setting.
NOTE: If any unusual noise or vibration is noticed, stop the compressor and refer to the Troubleshooting Guide at the end of this
manual.
SHUT-DOWN
NOTE: NEVER stop the air compressor by unplugging it from the
power source. This could result in damage to the unit.
1. Ensure that the On/Off lever on the pressure switch is in the
OFF position.
NOTE: If finished using compressor, follow steps 2–7 below.
2. Unplug the cord from the outlet. When compressor is not in
use, utilize the cord wrap to keep the cord in place.
3. Turn the regulator knob counterclockwise until it is fully closed.
Ensure that the regulated pressure gauge reads 0 PSI.
4. Remove the hose and accessory.
5. Drain the air tanks.
6. Allow the compressor to cool down.
7. Wipe compressor clean and store in a safe, non-freezing area.
MAINTENANCE
The following procedures must be followed when maintenance or
service is performed on the air compressor.
1. Turn the On/Off lever on the pressure switch to the OFF
position.
2. Disconnect cord from electrical outlet.
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3. Drain tanks.
4. Allow the compressor to cool down before starting service.
NOTE: All compressed air systems contain maintenance parts
(e.g., filters, separators) which are periodically replaced. These
used parts may be, or may contain, substances that are regulated
and must be disposed of in accordance with local, state, and federal laws and regulations.
NOTE: Take note of the positions and locations of parts during disassembly to make reassembly easier.
NOTE: Any service operations not included in this section should
be performed by authorized service personnel.
Maintenance Chart
Procedure Day Week
Drain condensation in air tank(s) X
Check for unusual noise/vibration X
Check for air leaks* X
Check safety relief valve X
Inspect air filter (if necessary) X
Clean exterior of compressor X
*To check for air leaks, apply a solution of soapy water around
joints. While the compressor is reaching the pressure cut-out limit
and after the pump cuts out, look for air bubbles around the joints.
Repairs
No user serviceable parts in this tool. To assure product SAFETY
and RELIABILITY, repairs, maintenance and adjustment should be
performed by authorized service centers or other qualified service
organizations, always using identical replacement parts.
Accessories
Recommended accessories for use with your tool are available for
purchase from your local dealer or authorized service center. If you
need assistance in locating any accessory for your tool, contact:
D
EWALT Industrial Tool Co., 701 East Joppa Road, Baltimore, MD
21286 or call 1-800-4-D
EWALT.
CAUTION: The use of any other accessory not recommended
for use with this tool could be hazardous.
SERVICE
Please have the following information available for all service calls:
Model Number ______________________________________
Serial Number ______________________________________
Date and Place of Purchase ____________________________
The manufacturer reserves the right to make changes in price,
color, materials, equipment specifications or models at any time
without notice.
Full One Year Warranty
DEWALT heavy duty air compressors are warranted for one year
from date of purchase. We will repair, without charge, any defects
due to faulty materials or workmanship. For warranty repair information, call 1-800-4-D
EWALT. This warranty does not apply to
accessories or damage caused where repairs have been made or
attempted by others. This warranty gives you specific legal rights
and you may have other rights which vary in certain states or
provinces.
FREE WARNING LABEL REPLACEMENT: If your warning labels
become illegible or are missing, call 1-800-4-D
EWALT for a free
replacement.
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TROUBLESHOOTING GUIDE
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
EWALT
technician or your dealer.
Problem
Code
Compressor does not start or restart ................................................................9, 10, 11, 12, 14, 15, 16, 19
Unit does not or is slow to come up to speed ................................................8, 13, 15, 16, 19
Air compressor not making enough air..............................................................1, 3, 2, 18, 24, 29, 26, 7, 25, 5, 23
Insufficient pressure at air tool or accessory ....................................................24, 18, 2, 29, 3, 22, 25, 23
Unit runs excessively hot ..................................................................................2, 18, 13, 7, 5, 6
Excessive starting and stopping ........................................................................29, 27, 3, 22, 19, 20, 29, 23
Excessive noise during operation ....................................................................4, 5, 6, 16, 26
Moisture in discharge air....................................................................................27, 28
Safety relief valve “pops”....................................................................................17, 21, 19, 20
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CODE POSSIBLE CAUSE POSSIBLE SOLUTION
1 Clogged or dirty air intake filter. Clean or replace air intake filter.
2 Extremely high duty cycles. Run unit for lighter duty cycles.
3 Air leaks in air drain/discharge piping. Check tubing and connections.
4 Compressor check valve is loose or broken. Inspect valve. Clean or replace as required.
5 Cylinder or piston scratched, worn or scored. Repair or replace as required.
6 Worn connecting rod or bearing. Inspect. Repair or replace as required.
7 Extremely dusty atmosphere. Relocate the compressor.
8 Ambient temperature too low. Relocate compressor to warmer environment.
9 Power cord not plugged in. Plug cord into grounded outlet.
10 Pressure switch is in OFF position. Move the pressure switch to ON position.
11 Motor reset switch has tripped. Turn the compressor off, wait until motor is cool, then press
Motor reset switch (located on motor) firmly until a click is heard.
12 Fuse blown or circuit has tripped. Replace fuse or reset circuit breaker. Check for proper fuse. Use
only “Fusetron” type T fuses. Check for low voltage conditions.
Disconnect any other electrical appliances from circuit or operate
the compressor on its own branch circuit.
13 Wrong gauge wire or length of extension cord. If possible, eliminate extension cord. Check the chart on page 3
for proper gauge wire and cord length.
14 Tank air pressure exceeds pressure switch Set pressure switch in the AUTO position. The motor will
“cut-in” setting. automatically start when air tank pressure drops below “cut-in”
pressure.
15. Pressure relief valve on pressure switch has Drain tanks. If problem persists, contact D
EWALT customer
not unloaded pump head pressure. service at 1-800-4-D
EWALT.
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CODE POSSIBLE CAUSE POSSIBLE SOLUTION
16 Defective motor, motor capacitor. Contact D
EWALT Customer Service at 1-800-4-DEWALT.
17 Pressure switch does not shut off motor when Move the pressure switch to the OFF position. If the motor does
air compressor reaches “cut-out” pressure. not shut off, unplug the air compressor. If the electrical contacts
are welded together, replace the pressure switch.
18 Air compressor is not large enough for air required. Check accessory air requirement. If higher than the CFM or
pressure supply of the air compressor, then larger air compressor
is required.
19 Defective pressure switch. Replace the pressure switch.
20 Defective safety relief valve. Operate safety relief valve manually by pulling on test ring. If it
still leaks, replace the safety relief valve.
21 Excessive air tank pressure. Defective pressure switch. Replace the pressure switch.
22 Fittings not tight enough.
WARNING: Drain air before tightening.
Tighten fittings so air cannot be heard escaping. Check joint with
soap solution. Do not overtighten.
23 Defective or rusted air tank Air tank must be replaced. Do not attempt to repair air tank.
24 Pressure regulator knob not turned to high enough Adjust pressure regulator knob to proper setting or replace.
pressure or defective pressure regulator.
25 Hose or hose connections are too small or too long. Replace with larger hose or connectors.
26 Possible defective reed valve. Remove pump head and inspect valve plate and reed valve.
Clear or replace valves as required.
27 Condensation in air tank caused by high level of Drain air tank after every use. Drain air tank more often in humid
atmospheric humidity. weather and use an air line filter.
28 Compressor located in damp or humid location. Relocate the compressor.
29 Hose, hose connections or attached accessory leaks. Check for leaks. Replace if necessary.
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