RIDGID OL90150 User manual

OL90150
OPERATOR’S MANUAL
WHEELBARROW
AIR
COMPRESSOR
To reduce the risk of injury, the user
must read and understand the
Operator’s Manual before using this
product.
!
WARNING:
IN614300AV 9/04 Printed in U.S.A.

Table of Contents
Section Page
Table of Contents . . . . . . . . . . . . . . . .2
Safety Instructions . . . . . . . . . . . . . . .3
Safety Signal Words . . . . . . . . . . . . .3
Before Using the Air
Compressor . . . . . . . . . . . . . . . . . . . .3
Spraying Precautions . . . . . . . . . . . .5
Breathable Air Warning . . . . . . . . . . .5
Warning Labels . . . . . . . . . . . . . . . . .6
Motor Specifications and Electrical
Requirements . . . . . . . . . . . . . . . . . . .7
Power Supply and Motor
Specifications . . . . . . . . . . . . . . . . . .7
General Electrical Connections . . . . .7
110-120 Volt, 60 Hz Tool
Information . . . . . . . . . . . . . . . . . . . .8
Extension Cords . . . . . . . . . . . . . . . .8
Changing Motor Voltage . . . . . . . . . .9
Thermal Overload Protector . . . . . .10
Glossary of Terms . . . . . . . . . . . . . .10
Unpacking and Checking
Contents . . . . . . . . . . . . . . . . . . . . . .11
Section Page
Installation . . . . . . . . . . . . . . . . . . . . .11
Getting to Know Your Air
Compressor . . . . . . . . . . . . . . . . . . .12
Operating Your Air Compressor . . .14
Moisture in Compressed Air . . . . . .14
Lubrication . . . . . . . . . . . . . . . . . . . .14
Operating Your Air Compressor . . .15
For Trouble-Free Operation . . . . . .16
Maintenance . . . . . . . . . . . . . . . . . . .17
Tank . . . . . . . . . . . . . . . . . . . . . . . . .18
Filter Removal, Inspection, and
Replacement . . . . . . . . . . . . . . . . . .18
Drive Belt . . . . . . . . . . . . . . . . . . . . .18
Storage . . . . . . . . . . . . . . . . . . . . . .19
Maintenance Schedule . . . . . . . . . .19
Troubleshooting . . . . . . . . . . . . . . . .20
Repair Parts . . . . . . . . . . . . . . . . . . .24
Warranty . . . . . . . . . . . . . . . . . . . . . .28
2

Safety Instructions
This manual contains information that is
very important to know and understand.
This information is provided for SAFETY
and to PREVENT EQUIPMENT PROB-
LEMS. To help recognize this informa-
tion, observe the following symbols.
Safety Signal Words
Danger indicates
an imminently haz-
ardous situation which, if not avoided,
WILL result in death or serious injury.
Warning indicates
a potentially haz-
ardous situation which, if not avoided,
COULD result in death or serious injury.
Caution indicates a
potentially haz-
ardous situation which, if not avoided,
MAY result in minor or moderate injury.
Notice indicates
important informa-
tion, that if not followed, may cause dam-
age to equipment.
NOTICE:
!
CAUTION:
!
WARNING:
!
DANGER:
Since air compressors and other compo-
nents (material pump, spray gun, filters,
lubrications, hoses, etc.) used make up a
high pressure pumping system, the fol-
lowing safety precautions should be
observed at all times. Only persons well
acquainted with these rules of safe oper-
ation should be allowed to use the air
compressor.
1. Read instruction manuals for each
component carefully, before attempt-
ing to assemble, disassemble or
operate your particular system.
2. Wear safety glasses (meeting ANSI
Z87.1 or in Canada CSA Z94.3-99)
and use hearing protection when
operating the pump or unit. Everyday
glasses are not safety glasses.
3. Do not exceed pressure rating of any
component in system.
4. Protect material lines and air lines
from damage or puncture. Keep hose
and power cable away from sharp
objects, chemical spills, oil, solvents,
and wet floors.
5. Never point a spray gun at oneself or
any other person. Accidental dis-
charge may result in serious injury.
6. Check hoses for weak or worn condi-
tion before each use, making certain
all connections are secure; do not
use if deficiency is found. Notify an
authorized service facility for exami-
nation or repair.
7. Release all pressures within system
slowly; dust and debris may be harm-
ful.
Before Using the Air Compressor
All electrical work should be
done by a qualified (licensed or
certified) electrician. On a prop-
erly wired circuit, the black
wires supply a voltage potential
even when the unit is off.
!
WARNING:
Disconnect power and depres-
surize system before servicing
air compressor! (Turn pressure
regulator knob fully clockwise
after shutting off compressor.)
!
WARNING:
3

8. Follow all local electrical and safety
codes, as well as the National
Electrical Code (NEC) and the
Occupational Safety and Health Act
(OSHA).
9. Wiring and fuses should follow electri-
cal codes, current capacity, and be
properly grounded.
10. Electric motors must be securely and
adequately grounded. See grounding
instructions and extension cord infor-
mation in this manual.
11. Always disconnect power source
before working on or near a motor, or
its connected load. If power discon-
nect point is out-of-sight, lock it in the
open position and tag to prevent
unexpected application of power.
12. Guard all moving parts; keep visitors
away. Never allow children in work
area.
13. Use only a properly grounded outlet
that will accept a three pronged plug,
and wear shoes to prevent shock
hazards.
14. Be careful when touching exterior of
operating motor; it may be hot
enough to cause injury.
15. Protect power cable from coming in
contact with sharp objects.
16. Clean electrical or electronic equip-
ment with an approved cleaning
agent, such as dry, nonflammable
cleaning solvent.
17. To avoid spontaneous combustion,
discard waste rags into approved
metal waste cans.
18. Never store flammable liquids or
gases in vicinity of compressor.
19. When spraying with solvent or toxic
chemicals, follow instructions provid-
ed by the chemical manufacturer.
20. Spray in a well ventilated area, to
keep fumes from collecting and caus-
ing health and fire hazards.
21. Do not spray in vicinity of open
flames or other places where a spark
can cause ignition. Do not smoke
when spraying paint, insecticides, or
other flammable substances.
22. Use a respirator when spraying.
23. NEVER reset safety valve or pres-
sure switch. Keep safety valve free
from paint and other accumulations.
This provides safety against over
pressure.
24. Do regular maintenance; keep all
nuts, bolts, and screws tight, to be
sure equipment is in safe working
condition .
25. Keep cleaning rags and other flam-
mable waste materials in a tightly
closed metal container and dispose of
later in the proper fashion.
26. Drain tanks of moisture after each
day’s use. If unit will not be used for a
while, it is best to leave drain cock
open until such time as it is to be
used. This will allow moisture to com-
pletely drain out and help prevent
corrosion of inside of tank.
27. Inspect tank yearly for rust, pin holes
or any other imperfections that could
cause it to become unsafe. NEVER
weld or drill holes in air tank.
28. Do not wear loose clothing or jewelry
that will get caught in the moving
parts of the unit.
Safety Instructions (continued)
4

1. Do not smoke when spraying paint,
insecticides, or other flammable sub-
stances.
2. Use a face mask/respira-
tor when spraying and
spray in a well ventilated
area to prevent health and
fire hazards.
3. Do not direct paint or other sprayed
material at the compressor. Locate
compressor as far away from the
spraying area as possible to minimize
overspray accumulation on the com-
pressor.
4. When spraying or cleaning with sol-
vents or toxic chemicals, follow the
instructions provided by the chemical
manufacturer.
5
Spraying Precautions
Do not spray flamma-
ble materials in vicin-
ity of open flame or
near ignition sources including
the compressor unit.
!
WARNING:
Breathable Air Warning
This compressor/pump is not equipped and should not be used “as
is” to supply breathing quality air. For any application of air for
human consumption, the air compressor/pump will need to be fitted
with suitable in-line safety and alarm equipment. This additional
equipment is necessary to properly filter and purify the air to meet
minimal specifications for Grade D breathing as described in
Compressed Gas Association Commodity Specification G 7.1 - 1966,
OSHA 29 CFR 1910. 134, and/or Canadian Standards Associations
(CSA).
DISCLAIMER OF WARRANTIES
In the event the compressor is used for the purpose of breathing air
application and proper in-line safety and alarm equipment is not
simultaneously used, existing warranties shall be voided, and
Campbell Hausfeld disclaims any liability whatsoever for any loss,
personal injury or damage.
!
DANGER:

Safety Instructions (continued)
6
Find and read all warning labels found on
the air compressor shown below
Warning Labels
DK724100AV 100
0

The A-C motor used on this compressor
is a capacitor start, capacitor run non-
reversible induction type, having the fol-
lowing specifications. It is wired at the
factory for operation on 110V-120V AC,
60 Hz service.
Voltage 110-120 220-240
Amperes 15.0 7.5
Hertz (Cycles) 60
Phase Single
RPM 3450
Motor Specifications and
Electrical Requirements
7
Power Supply and Motor Specifications
To reduce the risk of electrical
hazards, fire hazards or damage
to the tool, use proper circuit
protection. Your tool is wired at
the factory for operation using
the voltage shown. Connect
tool to a power line with the
appropriate voltage and a 15-
amp branch circuit. Use a 15-
amp time delay type fuse or cir-
cuit breaker. To reduce the risk
of shock or fire, if power cord is
worn or cut, or damaged in any
way, have it replaced immedi-
ately.
!
WARNING:
General Electrical Connections
To reduce the risk of electrocu-
tion:
1. Use only identical replace-
ment parts when servicing.
Servicing should be per-
formed by a qualified techni-
cian.
2. Do not use in rain or where
floor is wet. This tool is
intended for indoor residen-
tial use only.
!
DANGER:
Do not permit fingers to touch
the terminals of plug when
installing or removing the plug
to or from the outlet.
!
WARNING:

8
The plug supplied on your tool may not
fit into the outlet you are planning to use.
Your local electrical code may require
slightly different power cord plug connec-
tions. If these differences exist refer to
and make the proper adjustments per
you local code before your tool is
plugged in and turned on.
In the event of a malfunction or break-
down, grounding provides a path of least
resistance for electrical current to reduce
the risk of electric shock. This tool is
equipped with an electric cord having an
equipment-grounding conductor and a
grounding plug, as shown. The plug must
be plugged into a matching outlet that is
properly installed and grounded in accor-
dance with all local codes and ordi-
nances.
Do not modify the 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
equipment-grounding conductor to a live
terminal.
If the grounding instructions are not com-
pletely understood, or if you are in doubt
as to whether the tool is properly ground-
ed check with a qualified electrician or
service personnel.
Motor Specifications and
Electrical Requirements (continued)
110-120 volt, 60Hz Tool Information
If not properly grounded, this
tool can cause an electrical
shock, particularly when used
in damp locations, in proximity
of plumbing, or out of doors.
!
WARNING:
TEST RESET
Grounding Prong
3-Prong Plug
Properly
Grounded
3-Prong
Outlet
Extension Cords
1. The air compressor should be located
where it can be directly plugged into
an outlet. An extension cord should
not be used with this unit.
2. To avoid loss of power and overheat-
ing, additional air hose must be used
to reach work area instead of exten-
sion cords.

9
NOTE: The motor is prewired at the fac-
tory for 120V operation. Use the follow-
ing procedure to change motor voltage to
240V.
1. Unplug the power cord before making
or modifying connections.
2. Remove the hitch pin.
3. Toggle the motor voltage selector
switch from 120V to 240V.
4. Install the hitch pin.
5. Unscrew the pressure switch cover
retaining screw and remove the pres-
sure switch cover.
6. Remove the black and white wires
labeled ‘line’ and the green ground
wire. Loosen the screw for the strain
relief.
7. Install a 3 wire, 240 volt, 15 amp U.L.
listed cord (not provided). Be sure to
connect the white and black wires to
the terminals labeled ‘line’ and the
green ground wire to the ground ter-
minal. Also tighten the strain relief
screw.
8. Install the pressure switch cover and
fasten the pressure switch cover
retaining screw.
The unit is now ready for 240 Volt opera-
tion.
Changing Motor Voltage
If not properly grounded, this
tool can cause an electrical
shock, particularly when used
in damp locations, in proximity
of plumbing, or out of doors.
!
WARNING:
Hitch pin
Motor
voltage
selector
switch
Line
terminals
Ground
terminal
Strain relief
screw
Pressure Switch
Pressure Switch Cover
Retaining
screw

10
Thermal Overload Protector
If thermal overload protector shuts motor
OFF frequently look for the following
causes.
1. Low voltage.
2. Wrong gauge wire.
3. Clogged air filter.
4. Lack of proper ventilation.
5. Unit is being used with an extension
cord.
See Troubleshooting Chart for corrective
action.
This compressor is equipped
with an automatic reset thermal
overload protector which will
shut off motor if it becomes
overheated.
!
CAUTION:
The motor must be allowed to
cool down before start-up is
possible. The motor will auto-
matically restart without warn-
ing if left plugged into electrical
outlet, and the motor is turned
on.
!
CAUTION:
ASME Safety Valve
A safety valve that automatically releases
the air if the air receiver (tank) pressure
exceeds the preset maximum.
PSI (Pounds per Square Inch)
Measurement of the pressure exerted by
the force of the air. The actual psi output
is measured by a pressure gauge on the
compressor.
SCFM (Standard Cubic Feet per
Minute)
Sometimes called CFM (Cubic Feet per
Minute). Measurement of air volume
delivered by the compressor.
Air Delivery
A combination of psi and SCFM. The air
delivery required by a tool is stated as
(number) SCFM at (number) psi. The
combination of these figures determines
what size unit is needed.
Air Tank Capacity
The volume of air stored in the tank and
available for immediate use. A large tank
allows the intermittent use of an air tool
with an air requirement higher than the
compressor’s rated delivery.
Volts or Voltage
A measurement of the force of an electri-
cal current.
Amps or Amperage
A measure of the electrical force minus
the resistance on an electrical line.
RIDGID air compressors require 15
amps for operation. Be sure the com-
pressor will operate on an electrical line
with the proper amps. If other appliances
operate on the same line, they will
reduce the available amps. If the amper-
age is not adequate, the result will be
blown fuses or tripped circuits.
Glossary of Terms
Motor Specifications and
Electrical Requirements (continued)

11
Regulator
A control that adjusts the line pressure to
the proper amount needed to operate
spray guns and air tools.
Tank Pressure Gauge
Indicates tank pressure in psi.
Line Pressure Gauge
Displays the current line pressures. It is
regulated by the regulator knob.
Cut-in/Cut-off Pressure
Specific psi at which a compressor starts
and stops while refilling the air tank.
Glossary of Terms (continued)
1. Remove the air compressor from the
carton.
2. Place the compressor on a secure,
stationary work surface and look it
over carefully.
Unpacking and Checking Contents
Do not operate unit if damaged
during shipping, handling or
use. Damage may result in
bursting and cause injury or
property damage.
!
WARNING:
For your own safety, never
operate unit until all assembly
steps are complete and until
you have read and understood
the entire operator’s manual.
!
WARNING:
To reduce the risk of injury, if
any parts are missing, do not
attempt to operate the air com-
pressor until the missing parts
are obtained and installed cor-
rectly.
!
WARNING:
1. Check and tighten all bolts, fittings,
etc., before operating compressor.
2. Operate compressor in a ventilated
area so that compressor may be
properly cooled.
3. Compressor should be located where
it can be directly plugged into an out-
let. An extension cord should not be
used with this unit.
4. To avoid loss of power and overheat-
ing, additional air hose must be used
to reach work area instead of exten-
sion cords.
Installation
THIS UNIT CONTAINS NO OIL!
Follow lubrication instructions
before operating compressor.
NOTICE:

12
Getting to Know Your Air Compressor
2 Air Filter
5 Tank Drain
Valve
4 Handles
1 Belt Guard
3 Dipstick
7 Air Storage
Tank 6 On/Off Switch
(Pressure
Switch)
12 ASME
Safety Valve
10 Regulator Knob
13 Air Outlet Fittings
11 Tank
Pressure
Gauge
9 Regulated
Outlet Gauge
8 Motor Voltage
Selector Switch

13
1. Belt Guard. The belt guard encloses
the pulleys and drive belt. It protects
the user from moving parts and
directs cooling air to the compressor
pump.
2. Air Filter. The air filter keeps dirt and
debris from entering the compressor
pump and reduces compressor noise.
3. Dipstick. The dipstick measures the
oil level in the compressor pump.
4. Handles. Used to move the compres-
sor.
5. Tank Drain Valve. The tank drain
valve allows moisture to be removed
from the tank.
NOTE: Each tank has its own tank
drain valve.
6. On/Off Switch. This switch allows for
manual control of the compressor.
Note that when the switch is turned
on, the compressor will automatically
start and stop depending on tank
pressure.
7. Air Storage Tanks. The tanks store
air for later use.
8. Motor Voltage Selector Switch.
Allows convenient voltage change
from 120 volts to 240 volts.
9. Regulated Outlet Gauge. This gauge
shows at-a-glance, air pressure at
outlet. Air pressure is measured in
pounds per square inch (PSI). Most
tools have maximum pressure ratings.
Never exceed the maximum pressure
rating of the tool you are using. Be
sure this gauge reads ZERO before
changing air tools or disconnecting
hose from outlet.
10.Regulator Knob. This knob controls
air pressure to an air operated tool or
paint spray gun. Turning the knob
clockwise increases air pressure at
the outlet. Turning counterclockwise
will lower air pressure at the outlet.
Fully counterclockwise will shut off the
flow of air completely.
11.Tank Pressure Gauge. Gauge shows
pressure in air storage tanks indicat-
ing compressor is building pressure
properly.
12.ASME Safety Valve. This valve auto-
matically releases air if the tank pres-
sure exceeds the preset maximum.
13.Air Outlet Fittings. These fittings are
1/4” universal-style quick connect fit-
tings and allow rapid tool changes.
Dipstick
Add Oil Fill
Line
Max
Low
Close Open

14
Operating Your Air Compressor
All lubricated compressor pumps dis-
charge some condensed water and oil
with the compressed air. Install appropri-
ate water/oil removal equipment and con-
trols as necessary for the intended appli-
cation.
Remove the dipstick and fill pump with 12
ounces of oil. Use single viscosity, ISO
100 (SAE 30), non-detergent compressor
oil; or Mobil 1®5W30 or 10W30 synthetic oil
may also be used. See illustration for prop-
er oil fill.
THIS UNIT CONTAINS NO OIL!
Follow lubrication instructions
before operating compressor.
NOTICE:
Lubrication Dipstick
Add Oil Fill
Line
Max
Low
Moisture in compressed air will form into
droplets as it comes from an air com-
pressor pump. When humidity is high or
when a compressor is in continuous use
for an extended period of time, this mois-
ture will collect in the tank. When using a
paint spray or sandblast gun, this water
will be carried from the tank through the
hose, and out of the gun as droplets
mixed with the spray material.
IMPORTANT: This condensation will
cause water spots in a paint job, espe-
cially when spraying other than water
based paints. If sandblasting, it will
cause the sand to cake and clog the gun,
rendering it ineffective.
A filter in the air line, located as near to
the gun as possible, will help eliminate
this moisture.
Moisture in Compressed Air

15
1. Remove the dipstick and fill pump to the
proper oil level. See Lubrication Section.
2. Open tank drain valves and turn regu-
lator knob counterclockwise.
3. Turn pressure switch knob to OFF
position and plug in power cord.
4.
Follow this step only if using your
compressor for the first time.
Turn
pressure switch knob to AUTO posi-
tion and run unit for 30 minutes to
“break in” the pump parts.
5. Close tank drain valves and turn regu-
lator knob fully clockwise. Compressor
will build to maximum preset pressure
and shut off.
6. Turn regulator knob counterclockwise
to cause air to bleed off. Do not pro-
ceed to the next step until outlet pres-
sure gauge reaches zero (0).
7. Attach hose. Add chuck or other tool
to open end of hose. Turn regulator
knob clockwise until desired outlet
pressure is reached.
8. After use, turn pressure switch knob
to the OFF position.
9. If compressor is not used for a long
period of time, bleed air from line and
use drain valve to drain water from
the valves and tank. Afterwards, fol-
low the proper schedule of mainte-
nance.
NOTE: This unit is equipped with a pres-
sure switch that automatically turns the
motor OFF when the tank pressure
reaches a preset level. After air pressure
in the tank drops to a certain level, the
pressure switch automatically turns the
motor back on.
Operating Your Air Compressor
Do not over-pressurize any air
tool. Consult air tool instruc-
tions for proper air tool pres-
sure.
!
WARNING:

16
Operating Your Air Compressor (continued)
1. Read instructions: Carefully read
through this operator’s manual
BEFORE OPERATING the new air
compressor. It contains information
about operation and maintenance of
the unit.
2. Drain tanks daily: Depressurize sys-
tem prior to draining tanks. Open tank
drain valves and drain moisture from
tanks. This helps prevent tank corro-
sion and keeps oil and moisture out
of the compressed air system. Be
sure to close tank drain valves before
operating compressor.
3. Change air filter: Never run compres-
sor without an air filter nor with a
clogged air filter. Replace with a new
filter when the element is dirty.
For Trouble-Free Operation

17
1. Check compressor for any visible
problems, especially check air filter to
be sure it is clean.
2. Pull ring on safety valve and allow it to
snap back to normal position.
3. Drain moisture from tanks daily. Shut
compressor off. Depressurize system
prior to draining tanks. Drain moisture
from tanks by opening the tank drain
valves underneath the tanks.
4. Turn power OFF and clean dust and
dirt from motor, tank, air lines and
pump cooling fins.
NOTE: The air filter in the filter housing
on the side of the head must be checked
and cleaned periodically, more often if
used under very dusty conditions or
when a great deal of fog from spraying is
allowed to circulate near unit.
IMPORTANT: Unit should be located as
far from spraying area as hose will allow
to prevent over-spray from clogging filter.
Maintenance
Safety valve must be replaced if
it cannot be actuated or it leaks
air after ring is released.
!
WARNING:
Release all pressure and dis-
connect power before making
any repair.
!
WARNING:

18
The tanks should be carefully inspected
at a minimum of once a year. Look for
cracks forming near the welds. If a crack
is detected, remove pressure from tank
immediately and replace.
Tank
Never attempt to repair or modi-
fy a tank! Welding, drilling or
any other modification will
weaken the tank resulting in
damage from rupture or explo-
sion. Always replace worn,
cracked or damaged tanks.
!
DANGER:
Drain liquid from tanks daily.
NOTICE:
TO OPEN
Tank Drain (2)
To change a filter, pull off the filter housing
cover. If filter element is dirty, replace ele-
ment or entire filter.
Filter Removal, Inspection and Replacement
Drive Belt
Belt stretch is a result of normal use.
When properly adjusted, the belt deflects
about 1/2” with five pounds of pressure
applied midway between the motor pulley
and pump.
To adjust drive belt tension:
1. Before servicing, put on ANSI Z87.1-
approved eye protection. Turn off and
unplug compressor. Drain all moisture
and air from unit by fully opening tank
drain valve.
1/2” Deflection
Maintenance (continued)

19
Operation Daily Weekly
Drain Tanks 
Check Air Filter 
Check Safety Valve 
Blow Dirt From Inside Motor 
Maintenance Schedule
1. When not in use, compressor should be
stored in a cool dry place.
2. Tanks should be drained of moisture.
3. Hose should be disconnected and hung
open ends down to allow any moisture
to drain.
Storage
2. With a marker, mark the edge where
the motor meets the base (the edge
farthest away from the pump).
3. Remove the belt guard bolt and nut.
4. Remove the front belt guard cover.
5. Loosen the four motor mounting
bolts.
6. The belt tension will pull the motor
toward the pump. Remove the belt
from the unit and set it on the ground.
7. Using the reference mark made in
step 1, move the motor approximately
1/4" past the mark (moving it away
from the pump).
8. Use a straight edge to make sure the
motor pulley is in line with the pump
flywheel. Tighten down the two motor
bolts furthest from the pump.
9. Put the belt on the motor pulley and
carefully roll it over the pump fly-
wheel. Do this by starting the other
end of the belt over the top of the
pump flywheel and turning the fly-
wheel counterclockwise.
Touch Rim in Two
Places
Straight Edge
Parallel With Belt
10. Check belt tension. If still too loose,
loosen the front two motor bolts and
repeat steps 4-6. (When doing so,
move motor an additional 1/4" away
from pump).
11. When belt tension is good, tighten the
other two motor bolts.
12. Install the front belt guard cover.
13. Install and tighten the belt guard bolt
and nut.
When installing belt, use
caution to avoid injury to
fingers or hands.
!
CAUTION:

20
Troubleshooting
For your own safety do not try
and run the air compressor
while troubleshooting.
!
WARNING:
TROUBLE PROBABLE CAUSE REMEDY
Compressor will not
run
Motor hums but can-
not run or runs slow-
ly
Fuses blow/circuit
breaker trips repeat-
edly
1. Unit is plugged into
extension cord
2. No electrical power
3. Blown fuse
4. Breaker open
5. Thermal overload open
6. Pressure switch bad
1. Low voltage
2. Unit is plugged into
extension cord
3. Shorted or open motor
winding
4. Defective check valve or
unloader
1. Incorrect size fuse, circuit
overloaded
2. Unit is plugged into
extension cord
3. Defective check valve or
unloader
1. Remove extension cord
2. Verify unit is plugged in.
Check fuse/breaker or
motor overload
3. Replace blown fuse
4. Reset, determining why
problem happened
5. Motor will restart when cool
6. Replace
1. Check with voltmeter
2. Remove extension cord
3. Replace motor
4. Replace or repair
1. Check for proper fuse, use
time-delay fuse.
Disconnect other electrical
appliances from circuit or
operate compressor on its
own branch circuit
2. Remove extension cord
3. Replace or repair