give you years of trouble-free, profitable
service. However, no machine is better
than its operator.
Read, understand and follow all safety
warnings and instructions provided with
the product. Failure to follow the warnings
and instructions may result in electric
shock and/or serious injury. Save all warnings and instructions for future reference.
SAVE THESE INSTRUCTIONS!
Page 2
Mini-Rooter XP®
WARNING! Read and understand all
instructions. Failure to follow all instructions
listed below may result in electric shock, fire
and/or serious personal injury. Replacement
manuals are available upon request at no
charge, or may be downloaded from our website, www.drainbrain.com. Instructional videos
are available for download on our website, and
may be ordered. If you have any questions or
problems, please call General’s customer
service department at 412-771-6300.
SAVE THESE INSTRUCTIONS!
These instructions are intended to
familiarize all personnel with the safe
operation and maintenance
procedures for the Mini-Rooter XP.
SAFETY SYMBOLS
This is the safety alert symbol. It is
used to alert you to potential personal
injury hazards. Obey all safety messages that follow this symbol to avoid
possible injury or death.
Electric shock resulting in
death can occur if you plug
this machine into an improperly wired outlet. If the ground
wire is electrified, you can be
electrocuted by just touching
the machine, even when the
power switch is off. A ground
fault circuit interrupter will not protect you in this situation. Use a
UL approved tester to determine
if the outlet is safe.
Do not operate power tools in
explosive atmospheres, such
as in the presence of flammable liquids, gases, or dust.
Power tools create sparks which
may ignite dust or fumes.
Only wear leather gloves.
Never use any other type of
glove, such as cloth, rubber, or
coated gloves. Never grasp a
rotating cable with a rag.
These items could become
wrapped around the cable and
cause serious injury.
Always wear safety glasses
and rubber soled, non-slip
shoes. Use of this safety equip-
ment may prevent serious injury.
DANGER indicates a hazard with a high level of risk
which, if not avoided, will result in death or serious injury.
WARNING indicates a hazard with a medium level of risk
which, if not avoided, could result in death or serious injury.
CAUTION indicates a hazard with a low level of risk which,
if not avoided, will result in minor or moderate injury.
Never operate machine with
belt guard removed. Fingers
can get caught between belt and
pulley.
Do not overstress cables.
Overstressing cables may cause
twisting, kinking, or breaking of
the cable and may result in serious injury.
2
Page 3
Mini-Rooter XP®
GENERAL SAFETY RULES
WARNING
Read and understand all instructions. Failure to follow all instructions listed below may result in electric shock, fire, and/or
serious injury.
SAVE THESE INSTRUCTIONS!
Work Area
1. Keep work area clean and well lit. Cluttered benches and dark
areas invite accidents.
2. Do not operate power tools in explosive atmospheres, such
as in the presence of flammable liquids, gases, or dust.
Power tools create sparks which may ignite the dust or fumes.
3. Keep bystanders, children, and visitors away while operating
a power tool. Distractions can cause you to lose control.
Electrical Safety
1. Grounded tools must be plugged into an outlet, properly installed and grounded in accordance with all codes and ordinances. Never remove the grounding prong or modify the
plug in any way. Do not use any adapter plugs. Check with a
qualified electrician if you are in doubt as to whether the outlet is properly grounded. If the tool should electrically malfunc-
tion or break down, grounding provides a low resistance path to
carry electricity away from the user.
2. Avoid body contact with grounded surfaces such as pipes,radiators, ranges and refrigerators. There is an increased risk of
electric shock if your body is grounded.
3. Do not expose power tools to rain or wet conditions. Water
entering a power tool will increase the risk of electric shock.
4. Do not abuse the cord. Never use the cord to carry the tools or
pull the plug from an outlet. Keep cord away from heat, oil, sharp
edges or moving parts. Replace damaged cords immediately.
Damaged cords increase the risk of electric shock.
5. When operating a power tool outside use an outdoor exten-sion cord marked “W-A” or “W”. These cords are rated for outdoor use and reduce the risk of electric shock.
6. Test the Ground Fault Circuit Interrupter (GFCI) provided with
the power cord to insure it is operating correctly before operating machine. Machine must have a properly functioning ground
fault circuit interrupter on the power cord. GFCI reduces the risk of
electric shock.
7. Extension cords are not recommended unless they areplugged into a Ground Fault Circuit Interrupter (GFCI) found in
circuit boxes or outlet receptacles. The GFCI on the machine
power cord will not prevent electric shock from the extension
cords.
8. Only use proper three-wire extension cords in good condition
which have three-prong grounding plugs and three-pole re-
ceptacles which accept the tool’s plug. Use of damaged, inferior, or other extension cords will not ground the tool. Increases
the risk of electric shock and bodily injury or death.
9. Keep all electric connections dry and off the ground. Reduces
the risk of electric shock.
10. DO NOT touch plugs or tools with wet hands. Reduces the risk
of electric shock.
Personal Safety
1.Stay alert, watch what you are doing and use common sense
when operating a power tool. Do not use tool while tired or
under the influence of drugs, alcohol, or medication. A mo-
ment of inattention while operating power tools may result in
serious personal injury.
2.Dress properly. Do not wear loose clothing or jewelry. Con-
tain long hair. Keep your hair, clothing, and gloves away
from moving parts. Loose clothes, jewelry, or long hair can be
caught in moving parts.
3.Avoid accidental starting. Be sure switch is off before plug-ging in. Carrying tools with your finger on the switch or plugging
in tools that have the switch on invites accidents.
4.Remove adjusting keys or switches before turning the toolon. A wrench or key that is left attached to a rotating part of the
tool may result in personal injury.
5.Do not overreach. Keep proper footing and balance at alltimes. Proper footing and balance enables better control of the
tool in unexpected situations.
6.Use safety equipment. Always wear eye protection. Dust
mask, non-skid safety shoes, hard hat, or hearing protection
must be used for appropriate conditions.
Tool Use and Care
1.Use clamps or other practical way to secure and support the
workpiece to a stable platform. Holding the work by hand or
against your body is unstable and may lead to loss of control.
2.Do not force tool. Use the correct tool for your application.
The correct tool will do the job better and safer at the rate for
which it is designed.
3.Do not use tool if switch does not turn it on or off. Any tool
that cannot be controlled with the switch is dangerous and must
be repaired.
4.Disconnect the plug from the power source before making
any adjustments, changing accessories, or storing the tool.
Such preventative safety measures reduce the risk of starting the
tool accidentally.
5.Store idle tools out of reach of children and other untrainedpersons. Tools are dangerous in the hands of untrained users.
6.Maintain tools with care. Keep cutting tools sharp and clean.
Properly maintained tools, with sharp cutting edges are less likely
to bind and are easier to control.
7.Check for misalignment or binding of moving parts, break-
age of parts, and any other condition that may affect the
tool’s operation. If damaged, have the tool serviced before
using. Many accidents are caused by poorly maintained tools.
8.Only use accessories that are recommended by the manu-facturer for your model. Accessories that may be suitable for
one tool may become hazardous when used on another tool.
Service
1.Tool service must be performed only by qualified repair personnel. Service or maintenance performed by unqualified repair
personnel could result in a risk of injury.
2.When servicing a tool, use only identical replacement parts.
Follow instructions in the Maintenance section of this manual. Use of unauthorized parts or failure to follow Maintenance
Instructions may create a risk of electric shock or injury.
3
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Mini-Rooter XP®
SPECIFIC SAFETY RULES
This is the safety alert symbol. It is used to alert
you to potential personal injury hazards. Obey all
safety messages that follow this symbol to avoid
possible injury or death.
Electric shock resulting in death can occur if you
plug this machine into an improperly wired outlet. If
the ground wire is electrified, you can be electrocuted
by just touching the machine, even when the power
switch is off. A ground fault circuit interrupter will not
protect you in this situation. Use a UL approved tester to
determine if the outlet is safe.
Do not overstress cables. Overstressing cables may
cause twisting, kinking, or breaking of the cable and may
result in serious injury.
1.Only wear leather gloves. Never use any other type of glove,
such as cloth, rubber, or coated gloves. Never grasp a rotating
cable with a rag. These items could become wrapped around
the cable and cause serious injury.
2.Never operate machine with belt guard removed. Fingers can
get caught between belt and pulley.
3.Do not overstress cables. Keep leather-gloved hand on the
cable for control when machine is running. Overstressing cables
because of an obstruction may cause twisting, kinking, or breaking of the cable and may result in serious injury.
4.Place the machine at a distance not greater than two feetfrom the opening. Greater distances can result in cable twisting
or kinking.
5.Machine is designed for ONE-PERSON operation. Operator
must control foot switch and cable.
6.Do not operate machine in reverse (REV). Operating machine
in reverse can result in cable damage and is used only to back
cutting tool out of an obstruction.
7.Keep hands away from rotating drum. Do not reach into drum
unless machine is unplugged. Hand may be caught in the moving
parts resulting in serious injury.
8.Be careful when cleaning drains where cleaning chemicalshave been used. Avoid direct contact with skin and eyes. Drain
cleaning chemicals can cause serious burns as well as damage
the cable.
9.Do not operate machine if operator or machine is standingin water. Will increase risk of electrical shock.
10. Wear safety glasses and rubber soled, non-slip shoes. Use
of this safety equipment may prevent serious injury.
11. Before starting each job, check that the cable in the drum is
not broken or kinked, by pulling the cable out and checking
for wear or breakage. Always replace worn out (kinked or bro-
ken) cables with genuine GENERAL replacement cables.
12. Only use this tool in the application for which it was de-
signed. Follow the instructions on the proper use of the machine. Other uses or modifying the drain cleaner for other appli-
cations may increase risk of injury.
Ground Fault Circuit Interrupter (GFCI)
Your machine is equipped with a ground fault circuit interrupter, which
protects you against shock if a short circuit should occur. Check that
receptacle is properly grounded. Test the GFCI before each use.
1.Plug into 120-volt receptacle.
2.Push test button. Indicator light will go out and power to machine
should cut off.
3.If light does not go out when test button is pushed, DO NOT USETHE MACHINE until proper repairs can be made.
4.To restore power after test, push reset button. With the reset
button depressed, if the machine doesn't start, stops while running, or if the operator experiences a mild shock, DO NOT USETHE MACHINE! Tag the machine out of service and take it to a
motor repair center or return it to the factory for repairs.
THE SECTION OF CORD BETWEEN THE WALL PLUG AND THE
GFCI IS NOT IN THE PROTECTED CIRCUIT.
FEATURES - Closed Drum Mini-Rooter XP
Folding Handle
Motor Switch
Feed Control
Lever
Feed
Pressure
Knob
Cable
Cutter
Female
Connector
Front Drum Hub
Front Post Knob
Shown Right: Power Cable Feed
with Guide Tube
NOTE: Do not operate machine if warning labels on the switch box
and power cord are missing or illegible.
Belt Guard
V-Belt
Drum
Foot Pedal
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Mini-Rooter XP®
FEATURES - Open Drum Mini-Rooter XP
Folding Handle
Belt Guard
Momentary
Contact
Motor Switch
V-Belt
Front Drum Hub
Open Drum
Cable
Front Post Knob
Cutter
Pressure
Feed Control
Guide Tube
INSTALLING GUIDE TUBE HOLDER
1. The Guide Tube Holder on the Mini-Rooter XP should already be
installed when you receive the machine. If not, follow the illustration below for assembly.
Feed
Knob
Lever
2. To secure the end of the Guide Tube, hold the Guide Tube
Holder to one side of the frame.
3. Bend the Guide Tube back into the Holder so that it catches a
coil near the end of the Guide Tube. (See photo below.)
NOTE: Do not operate machine if warning labels on the switch box
and power cord are missing or illegible.
Cable Application Chart (Table 1)
Cable
Size
1/2" 3" to 4"
3/8" 2" to 3"
*5/16"
*1/4"
*The 1/4” and 5/16” diameter cables are for use with the J-Drum.
Pipe
Size
1-1/2"
to 2"
1-1/4"
to 2"
Typical
Applications
Roof Stacks and Small Floor Drains
(No roots)
Roof Stacks, Laundry Lines and Small
Drains
Sinks, Basins and Small Drains 50 ft.
Small Lines, Tubs and Shower Drains 50 ft.
Max.
Capacity
75 ft.
75 ft.
Cutter Application Chart (Table 2)
Cutter Cat. # Typical Applications
Cutters for 3/8” and 1/2”Cables
Arrow Head AH
Starting tool, ideal for cutting and
scraping.
THE CABLE AND SPRING ARE UNDER TENSION
WHEN ATTACHED TO THE HOLDER.
USE CAUTION WHEN RELEASING THE GUIDE TUBE
FROM THE HOLDER.
Boring
Gimlet
1-1/2”
U-Cutter
2” Side
Cutter Blade
Note: There are no fixed rules for what cutter to use. If one tool
doesn’t take care of a stoppage, simply try another.
BG
1-1/2UC
2SCB
Starting tool, to remove loose
objects.
Finishing tool, works well in
grease stoppages.
Finishing tool, for scraping inside
edges of pipe.
5
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Mini-Rooter XP®
OPERATING INSTRUCTIONS
MAKE SURE THE MOTOR SWITCH
IS IN THE ‘OFF’ POSITION!
Set-Up
1.Place machine within approximately two feet (.6m) of
drain opening. Be sure the
Mini-Rooter XP Guide Tube
(XP-GT) is in place. If you
can’t place the machine this
close to the drain opening,
run the cable through the
optional Guide Tube Extension (GTE) or a metal guide
tube to prevent cable whipping. On manual feed machines, always keep a gloved
hand on the cable.
2.Position the foot pedal for easy accessibility. The machine is
designed for one-person operation. Be sure you can quickly remove your foot from the pedal in an emergency.
3.Be sure the motor switch is in the off position.
4.Select the proper cutting tool (See Cutter Application Chart—
Table 2). A good tool to start with is the Arrow Head or Boring
Gimlet. After the line is opened, follow with larger blades, which
scrape the inside edges of the pipe, assuring a real cleaning job.
5.Insert the cutter into the female connector at the end of the 3/8"
4.Move the motor switch to the forward position. Then with a
gloved hand on the guide tube, depress the air foot pedal to start
machine.
5.Feed the cable into the line and against the obstruction with a
firm, even pressure. Adjust the feeding rate to the resistance
met. Do not force the cable – let the cutter do the work. The job
won’t get done any faster and you could damage the cable.
DO NOT USE TOO MUCH FORCE –
LET THE CUTTER DO THE WORK.
6.Don't leave too much slack in the cable since this will cause
whipping. If the cable starts to bend or build up too much twist,
release pressure on the foot pedal and rotate the drum in the
opposite direction to relieve the twist on the cable. Push any
excess cable back into the drum and then continue.
DO NOT ALLOW TOO MUCH SLACK IN THE CABLE
BETWEEN MACHINE AND DRAIN OPENING SINCE
THIS CAN CAUSE CABLE WHIPPING.
7.If you're having trouble getting around tight bends, try putting the
machine in reverse while applying steady pressure. (If using
Power Cable Feed, putting motor in reverse will cause the feed
control lever to operate opposite of normal.)
Note: If your machine is equipped with a momentary contact
reverse switch, you must hold the switch in position when operating the machine in reverse.
Operation
1.Begin by pulling the cable from the drum and sliding it into the
drain as far as it will go.
2.Tighten the knob at the top of the Power Cable Feed so that the
feed roller presses against the cable. Be sure not to over tighten
since this could cause excess cable wear. Note: The Power Ca-
ble Feed is designed for use with 3/8” and 1/2” cables only.
3.The feed lever controls the feeding rate and direction of the cable. Move the lever down to feed the cable out of the drum. The
further the lever is moved downward, the faster the cable will
feed out. Move the lever up to retract the cable into the drum.
When the lever is in the middle (neutral) position, the cable will
spin in place.
Feed Pressure Knob
Feed Control
Lever
Reverse
Neutral
Don't run motor in reverse for more than a few seconds at a
time as this could cause tangling in the drum or kinking.
8.If you still can't get around the bend, you're probably using too
large a cable. Switch to a 3/8" diameter cable, or even a smaller
one if necessary. (See Cable Application Chart—Table 1)
9.When the cable reaches the stoppage, put feed in neutral. Then
allow the cable to progress forward slowly, chewing into the stoppage as it goes. This slow forward movement will reduce stress
on the cable while doing a more thorough cleaning job. A back
and forth action often works best.
Hint: It's often helpful to have a small stream of water running
in the line to wash the cuttings away while the machine is in
operation and after.
Forward
6
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Mini-Rooter XP®
10. Be careful not to let the cutter get caught in the stoppage as you
work through it. This can cause kinking and breaking of the cable. When you feel the cable starting to twist in your hands, stop
the machine and pull back on the cable. This will free the cutter
from the obstruction. Then allow the cable to move forward
slowly into the stoppage. Remember, no cutting takes place
when the blades stop turning.
11. After the line has been opened, retract the cable by moving the
feed lever up. Make sure the motor switch is in the forward position. This is important to prevent the cable from tangling in the
drum or in the line.
DO NOT USE REVERSE TO PULL THE CABLE OUT
OF THE DRAIN. RUNNING MACHINE IN REVERSE
CAN CAUSE THE CABLE TO TANGLE IN THE DRUM.
12. When the cutter is near the drain opening, take your foot off the
pedal to stop drum rotation. Never retract the cutter from drain
while cable is rotating. The cable could whip and cause serious
injury.
SPECIAL OPERATIONS
IF CABLE GETS CAUGHT IN LINE
HOW TO REMOVE DRUM FROM MACHINE
DISCONNECT MACHINE FROM POWER SOURCE BE-
FORE INSTALLING CABLES OR DRUMS!
1.Loosen the front post knob and
swing Power Cable Feed out of
the way.
2.Push down on the spring-loaded
motor and slide the V-Belt off the
back of the drum.
3.Reach behind the drum and locate the drum-retaining latch. Pull
the latch to release the drum
shaft, then pull the drum forward
off of the machine.
4.To install the drum, simply slide drum onto machine. The latch
will lock automatically.
5.Remove the belt guard by loosening retaining knob on top. Position the V-Belt around the drum, then press down on the motor
and slip V-belt onto the pulley. Be sure to reattach the belt guard.
6.Reposition the Power Cable Feed and tighten knob at base of
front post.
DO NOT RUN MOTOR IN REVERSE FOR MORE THAN A
FEW SECONDS AT A TIME SINCE THIS COULD CAUSE
THE CABLE TO KINK OR TANGLE IN THE DRUM.
The motor can be reversed for a few seconds at a time to free cable if
it gets caught in the line. Use the following procedure:
1.Move motor switch to reverse position. (Open drum has momentary contact switch which must be held to operate in reverse.)
2.Wearing leather gloves, pull on cable while the drum is turning in
reverse.
3.When the cable is freed, slide excess cable back into drum.
4.Move the motor switch to the forward position again, and continue at Step 3 of the Operating Instructions.
IF CABLE TANGLES IN DRUM
This is almost always caused by using too much pressure when feeding the cable, or by feeding the cable while running the machine in
reverse. To untangle, rotate drum in opposite direction. This will usually get the cable to lie in the drum properly
If cable has become badly tangled, which shouldn’t happen when
machine is used properly, it can be straightened out by removing the
distributor tube from the drum. To do this:
DISCONNECT MACHINE FROM POWER SOURCE BE-
FORE INSTALLING CABLES OR DRUMS!
1.Loosen the four bolts that hold the front drum hub on the front of
the drum.
2.Pull the front drum hub and distributor tube forward, then pull the
tangled portion of the cable out of the drum.
3.After the cable has been straightened out, slide the distributor
tube and front drum hub back along the cable until it can be repositioned and bolted to the front of the drum.
4.Then, push the excess cable back into the drum.
HOW TO INSTALL 3/8" AND 1/2" CABLES IN DRUM
DISCONNECT MACHINE FROM POWER SOURCE BE-
FORE INSTALLING CABLES OR DRUMS!
To install cable in the drum, simply connect the male end of the cable
to the drum connecting cable, which is already attached to the drum.
Then remove the drum V-Belt and turn the drum clockwise, while
pushing the cable into the drum.
Note: The cable should lay in the drum in a
clockwise direction.
HOW TO USE J-DRUM
(Optional—Cat. #MR-250)
The J-Drum holds 50 feet of 1/4” or 5/16” cable to be used when you
need to clear smaller, 1-1/4” to 2” lines. These cables have a basin
plug head that can be spun through most strainer crossbars. (See
Cable Application Chart—Table 1.)
DISCONNECT MACHINE FROM POWER SOURCE BE-
FORE INSTALLING CABLES OR DRUMS!
1.To install cable, open chuck jaws
fully so that cable will pass through
easily.
7
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Mini-Rooter XP®
2.Slide the back end of the cable (opposite to the end with basin
head) through spout and into the drum. The cable will be easier
to install if you bend the last inch of cable at a 45-degree angle.
3.When working through difficult stoppages or tight bends, tighten
the chuck to provide more torque and to prevent the cable from
tangling in the drum.
4.Clean and lubricate chuck regularly to prevent corrosion.
MAINTENANCE
DISCONNECT MACHINE FROM POWER SOURCE
BEFORE PERFORMING MAINTENANCE!
To keep your machine operating smoothly, it is essential that all bearings and distributor tube bushings be lubricated. Oiling moving parts is
particularly important where machine comes in contact with sand, grit
and other abrasive material.
DAMAGED ROLLER
Excessive use may wear a roller to the point of failure. It is recommended that all three rollers be replaced at the same time (Cat # POMR-703). The replacement roller is an assembly consisting of one
Feed Roller, two Feed Roller Bearings, and two Bearing Spacers.
Note: The Bearing Spacers must be installed between the Carrier
and each Feed Roller Bearing (as illustrated below) in order to
ensure proper operation and to obtain maximum Feed Roller life.
To Replace the Feed Roller Assembly:
1.Remove the Feed Roller Assembly by unscrewing and removing
the Feed Roller Axle.
2.For convenience, the components are assembled and wired
together at the factory. Before attempting to install the assembly,
hold the assembly together and remove the wire.
3.While still holding the Feed Roller Assembly together, insert it
into the slot opening of the Carrier.
4.In order to help align the Spacers and Bearings, insert a pencil
point or similar object through the un-threaded end of the Axle
hole in the Carrier. After removing the pencil point, continue to
maintain the alignment of the components.
5.The Feed Roller Axle should then be inserted through the same
un-threaded Axle hole and should continue to be guided through
the Spacers and Bearings to the threaded Axle hole on the other
side of the Carrier.
6.Securely tighten the Axle to the Carrier with a 3/16” allen wrench.
CABLE MAINTENENCE
To get maximum service from your cables, be
sure that they are clean and well oiled. This not
only provides running lubrication but greatly extends the life of the cables as well. Some users
periodically pour oil directly into the drum. Then,
as the drum turns, the cables get complete lubrication. Our SNAKE OIL is ideally suited for this
purpose, since it not only lubricates the cables, it
deodorizes them as well.
FEED MAINTENANCE
Keep feed free of excessive soil and grit. It is recommended that the
feed be flushed with fresh water followed by a light oiling of the moving parts. No disassembly is normally required. Failure to feed can
usually be traced to the following possibilities:
DIRT ACCUMULATION
Over time, dirt can harden enough to stop roller rotation. Flushing with
water followed by liberal oiling can usually restore function. If disassembly is required, proceed as follows:
1.Remove the feed tension knob, springs and spring plunger. Note
the positioning of these parts to ease re-assembly. The top roller
can now be removed.
2.Remove the snap rings and thrust washers from the bottom
housing cylinders. The bottom rollers can now be removed.
3.Re-assembly is done in reverse order.
TANGLED CABLE
If a cable loops over itself in the drum, it will not feed properly. Remove and reload the cable to restore function. If the cable kinks, it is
evidence of abuse and results from the use of too much pressure or
use of the wrong size cable for the line. Do not force the cable — let
the cutter do the work.
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Mini-Rooter XP®
TROUBLE SHOOTING GUIDE (Table 3)
Problem Probable Cause Solution
Cable kinks or breaks. Operator forcing the cable. Do not force the cable. Let the cutter do the work.
Too much slack between machine and
Allow no more than two feet between machine and drain.
drain.
Cable used in wrong size drain line.
A cable that is too large or too small in diameter for a line is more
likely to kink. (Consult Table 1—Cable Applications.)
Cable exposed to acid. Clean and oil cables regularly.
Cable tangles in drum/cage. Operator forcing the cable. Do not force the cable. Let the cutter do the work.
Machine running in reverse.
Do not run the machine in reverse to retract the cable from the
drain.
Drum stops while foot pedal
Hole in pedal or hose. Replace as required.
depressed.
Hole in diaphragm switch. If no hole found in pedal or hose, replace diaphragm switch.
Drum turns in one direction but
not other.
Ground fault circuit interrupter
Faulty reverse switch or momentary
contact switch.
Replace reverse switch. Note: Momentary contact switch must
be held in position when using reverse.
Damaged power cord or extension cord. Replace cords.
trips and will not reset.
Short circuit in motor. Take motor to authorized repair center.