If it is not attached to the motor at two points it needs to be replaced. ... Troubleshooting Sanyo Air Conditioners 6 If the bearings are bad, you will hear noises or feel roughness. Synchronous Electric Motors are available in many sizes from 20 horsepower to several thousand horsepower and in speeds from 80 R.P.M. If the motor start contactor coil is good, with the coil still disconnected, check the … How to Troubleshoot a 3-Phase Electric Motor By Daniel Ray ... Take input voltage to the motor using the volt ohmmeter. Additional data gladly furnished upon request. 1. Training Applications for the Electrical Controls Industry. Open the motor access plate and check for burn marks inside. Also, if the capacitor is visibly cracked it should be replaced. TIP: Add this Electrical Motor Troubleshooting chart link to your favorites so you can call upon your smartphone to guide you during electrical motor troubleshooting. DIAGNOSTIC FLOW CHART FOR ... Before any troubleshooting is started, make certain the following conditions are met. Always keep hands and clothing away from moving parts. 2. Discharge all capacitors before servicing motor. Then the starting switch should be chosen to give the required overload and relay protection. quick reference only. Locate poor connections with test lamp. Your motor could also be burned out! 1) Disconnect main power supply to the motor and complete lockout and tag-out procedures before performing service or maintenance. This troubleshooting guide can also be applied to other types of three phase induction motors: These instruments are used to measure voltage,current, … to reduce risk of electrical shock, disconnect power before working on or around the water system. All industrial training software shown here is Win 10 to XP compatible. 2. In order to test the motor and determine the level of vibration, the load should be uncoupled and belts removed before running the motor. It is available in both non-reversible and reversible types and, on account of its light weight, may be shifted from one task to another with little effort. 4. After checking the motor shaft alignment, disconnect the motor from the driven load. The motor fault symptoms are in order of which is most common so you can determine how to tell if an electric motor is bad, quicker. Among the tasks which can be performed with this unit are driving ventilating fans, mine sump pumps or auxiliary pumps, diamond drills, and similar equipment. motor training or specific equipment manual. A replacement motor can fail sometimes immediately if the in-plant problem isn’t corrected. Load too light (single phase only) The moldboard is pointing straight ahead. It can also affect the insulating value of the winding insulation if it settles on the motor windings. Be sure required safety guards are in place before starting equipment. serious or fatal electrical shock may result from failure to connect the motor, control enclosures, metal plumbing, and all other metal near the motor or cable, to the power supply ground terminal using wire no smaller than motor cable wires. Motor Fails to Start. Disconnect power to the motor before performing service or maintenance. Things to Be Wary of When Doing Electric Motor Maintenance. Copyright 2012-2021 911Metallurgist | All Rights Reserved. (E G A ciden tal ou h by h an d s .) A great guide for which motor test you need to perform, be it a large industrial 3 phase electric motor troubleshooting job you are doing or you are just troubleshooting small electric motors. Its use has proved of great value to mill operators due to the flexibility of circuits using machines that are self¬contained units. Load out of balance (direct drive application) Remove the motor from load and inspect the motor by itself. Motors have continued to be reduced in size and overall dimensions, while horsepower output has increased over the past few years until the individual electric motor drive has practically replaced all flat belt drives in new installations. ELECTRIC MOTORS, GEARMOTORS AND DRIVES Site Search Sub Motor Trouble-Shooting Chart Caution: 1. 3. motor defective 4. key sheared off at pump or motor As 2 A 1. internal leakage due to wear 2. unsuitable type 3. pump defective 4. end-of-control pressure set too low, or control element defective 1. leakages 2. excessive line resistance 3. pressure filter blocked 1. excessive line resistance 2. return filter blocked 1. operating The modern electric motor installation the individual motor drive has practically replaced all other types. Record relevant motor nameplate data (hp, RPM, rated voltages and currents for armature and field) 2. Motor must be rewound: Poor stator coil connections: Remove end belts. The characteristics are usually built into them as required for the specific application and can be constant, synchronous, starting, pull-in, and pull-out torques. This motor, in all sizes and types, is equipped to operate at 90 lbs. Motor fails to start upon initial installation. The applications usually consist of: power factor correction, or improving power factor, and for constant-speed as well as low-speed direct drives on heavy equipment such as ball mills, large crushers, and similar machines requiring high horsepower and low R.P.M. For the motor, test the stator winding resistance phase-to-phase and phase-to-ground. At the end is just an example how our software uses real world workorder system to track student while doing electrical troubleshooting with our simulation software, and the detailed analysis report. Typical instruments used for troubleshooting motor operation problems include a Multimeter, Clamp-on Meter,Insulation Resistance Meter, and Infrared Thermometer. Leave your phone number if you would like us to call you. HVAC System Troubleshooting Basics Tech Tips Motor Identification Chart 1 3 4 6 7 Variable Speed Motors Premium ECM Motor Diagnostics X13 ® & Endura Pro Motors Standard ECM Motor Diagnostics Evergreen® Replacement Motors or Retrofit Retrofit Motor Diagnostics Outdoor Motors Motor Identification Chart Final Checks 10 26 37 50 53 • check voltage at the motor connections in the If the motor then operates smoothly, look for the source of noise or vibration in the driven equipment. If the motor overload(s) trips again, return to Step 5 of “Troubleshooting voltage source problems” to determine if the problem is a motor problem or load problem. MAINTENANCE & TROuBLESHOOTING • Motor inspection criteria MOTOR SELECTION • Advantages and disadvantages Always keep hands and clothing away from moving parts. There are also other factors which greatly affect the performance of electric motors such as low resistance, dirt, moisture, over-current and vibrations. Breakdown causes by electric motor failures always happen in our operation due to of 2 major factors.It is Mechanical component defect and Electrical circuit failure. Motor starting switches have been developed for a wide variation of load requirements, and special switches are available for operation in damp or dust laden atmospheres with high efficiency. These quick-comparison guides can provide you with initial assistance when searching for a motor, gearbox or control. Discharge all capacitors before servicing motor. Let us make recommendations for your proposed installation. The above electric motor troubleshooting chart will get you down to the specific failure cause like a capacitor or a centrifugal switch, but will not get into details like electric motor troubleshooting capacitor, its self. 2) Discharge all capacitors and VFD before servicing the motor cause it is stored some high of voltage. 3. 2x can dominate during coastdown Some 1x 2.) Defective motor bearings. Turn off the power to the motor then disconnect it from the power source. If the motor overloads are not tripped, verify that the starter control circuit has the proper secondary voltage using a DMM set to voltage mode and the appropriate range. Electrical Faults of Motor: The Motor Winding Inter Turn Short Circuit and Very Poor Contact, Punctured Insulation. Always keep hands and clothing away from moving parts. The use of drivers of this type has resulted in greater efficiency, lower operating and maintenance costs, and easier accessibility than was the case with the formerly widely used lineshaft drive and its associated inconvenience. Troubleshooting Your Electric Golf Cart Motor Written by Robert Miller on Mar 21, 2010. to 3600 RPM. cause, you should refer to the equipment manual should you need more detail. Mobile friendly too, so accessible wherever you are troubleshooting electric motors. Time to … Anyone dealing with the maintenance of electric motors should be very careful given the hazardous nature of electricity. The motor-specified voltage must be present on all three phases. The table below gives the commonly encountered problems in 3 phase squirrel cage induction motors, cause of problems and what remedy to apply to bring the motor back to production. If the vibration stops, look for an electrical unbalance. (E.G. An electric fireplace can have a number of motorized components. Electric motors should be installed very carefully and should be looked after at regular intervals. Most of them are caused by the over-heating of motor. Tools,Wires) It is particularly adapted to a variety of underground tasks and can be operated to drive either direct connected or through belt and pulley drive. 2 Pr otecinag sl d bj up 12 mm. coil). Free online electric motor troubleshooting flowchart tool. It is comparatively easy to obtain the required speed through the use of motors directly connected to the driven machine, through speed reducers, or the now more economical geared motors, or even through V-belt or chain or sprocket drive. Inspect the motor for any obvious defects that would prevent safe testing such as: Motor misaligned to load. Disconnect all wires to the motor and label them Make sure none of the terminals are grounded to the motor or cart With your meters set on Ω ohms, you should have continuity present between F1 and F2, and between A1 and A2 but NOT between any A and any F Terminal. EZGO Golf Cart Electric Motor Troubleshooting Table For all your electrical motor issues please match the symptoms to the probably cause. BOX 2400 FO RT SMI H, AK N 7 29 0- 4 U .S A First # Protection Against Solid Objects IP TESTS O NOPR TEC I 1 Protection against solid obje cts up to 50 m . Individual lessons focus on topics like common types of DC electric motor failures, how to use a megger to test a DC electric motor armature, how to use a multimeter to test DC motor field windings, and how to troubleshoot a DC motor using a troubleshooting chart. Tips For Troubleshooting Electric Motors Understanding the nuances of various motor types is essential when servicing or installing such units B Y D E N N I S B U S H A fter more than 100 years of use, with an ever increasing installed base, there are probably few aspects of an electric motor… Perform a check of the bearings. Tap the first diamond for extra electric motor troubleshooting steps and tips. If a short or ground is found, replace the motor starter contactor coil and start the motor. If the motor has been operated successfully, problems such as incorrect hook–up or internal misconnection can be ruled out immediately. The exact method of perform ing these tests will depend on the type of motor being serviced. These parts can be replaced with right tools and some patience. The individual motor drive has also found rapid acceptance due to its adaptability to almost every type of driving problem. Bearing misalignment can give rub symptoms 1.) Tap the first diamond for extra electric motor troubleshooting steps and tips. 3) Use proper clothing or jacket during performing servicing or maintenance. 3. To ensure our content is always up-to-date with current information, best practices, and professional advice, articles are routinely reviewed by industry experts with years of hands-on experience. Disconnect power to the motor before performing service or maintenance. If your motor can start motor manually, that means that something is wrong with power being delivered to it. Cure 4a: Use the relay size specified by the National Electric Code (NEC) for the motor nameplate current and service factor. Cure 2c: See Trouble 5, page 7. Laboratory Testing Consulting & Engineering Process Equipment. Check bearings and lubrication: Short circuited stator: Indicated by blown fuses. Make sure that you disconnect it before doing so! You should be all set thanks to this guide on troubleshooting your electric golf cart motor. If the disconnected motor still vibrates, remove power from the motor. BALDOR ELECTRIC COMPANY P.O. Metallurgical ContentMotor SwitchesAir MotorsFractional HP and General Purpose MotorsSynchronous Motors Motor Switches Motor starting switches have been developed for a wide variation of load requirements, and special switches are available for operation in damp or dust laden atmospheres with high efficiency. 4. Cure 2a: Replace the defective controller. In this case, you will need to get a new motor. It can damage the motor by blocking the cooling fan which causes its temperature to raise. One is the electrical faults, such as the various faults of switches, buttons, fuses, electric brushes, stator winding, rotor, starting equipment and so on. A great guide for which motor test you need to perform, be it a large industrial 3 phase electric motor troubleshooting job you are doing or … ELECTRIC MOTOR DIAGNOSTIC CHART Cause Frequency Dominant Plane Power Cut Comments Primary 2x 1.) ELECTRIC MOTORS, GEARMOTORS AND DRIVES Site Search Sub Motor Trouble-Shooting Chart Caution: 1. 2x is more prevalent with higher misalignment Primary 2x 1.) Local electrical codes should be carefully checked before final selection is made. Be sure required safety guards are in place before starting equipment. MOTOR UNWANTED CONTINUITY TEST The following tests can assist in troubleshooting. If not, check supply circuitry, breakers and condition of the motor's power cord. They should be carefully applied to the load when used as prime movers as difficult starting may result if not specifically designed to start under heavy loads. Check for corrosive connections on both sides. Free online electric motor troubleshooting flowchart tool. However, you might end up needing to rewind or replace it. Realign the load. (IE: Using a VOM, what resistance you should see, etc.) Dirt: Dirt is one of the major sources that cause damage to the electric motors. 4. Disconnect the motor starter contactor coil and check for a short, ground or open circuit. Most of the electric motor failures occur at the start up. To perform a cursory check of the bearings, place the motor on a solid surface and place one hand on the top of the motor, spin the shaft/rotor with the other hand. troubleshooting a pump circuit • put pump hoa swith into “hand” and onfirm that the contactor is pulling in –you should hear an audile “lunk”. 2. Parallel causes radial forces and angular causes axial Some 1x 2.) The course explains the fundamentals of DC motor maintenance, including proper lubrication, brush replacement, and inspection, along with the correct troubleshooting techniques. The more details you give on your situation, the better we can help you. This article describes A/C electrical motor troubleshooting: here we provide an electric motor diagnostic table, a troubleshooting guide that helps diagnose and repair most electric motor problems for motors found on HVAC equipment in buildings such as air conditioners, furnace or air handler blower fans, oil burner motors, well pumps, and condensate return pumps. Once isolating a particular Although in the future we plan on adding them to the flowchart app as electric motor troubleshooting and repair PDFs, videos and free online courses. 3. This can often be done by coupling the left cylinder into the right cylinder and ... Motor Solenoid, Electric Motor. DC Motors: Maintenance & Troubleshooting is part two of the DC Motors two-part training series.. Cure 2b: See Trouble 3, page 6. Inspect the motor capacitor. Electric Motor Troubleshooting. Electric Motor Troubleshooting Guide: The electric motor troubleshooting problems and solutions diamonds below for Motor Fails to Start, from left to right, are listed in order most common to less common. Electric Motor Troubleshooting Guide: The electric motor troubleshooting problems and solutions diamonds below for Motor Fails to Start, from left to right, are listed in order most common to less common. It should not be considered a replacement for complete The small, sturdy Air Motor illustrated is an exceptionally useful unit in underground operations. Mobile friendly too, so accessible wherever you are troubleshooting electric motors. The other is the mechanical problems, such as the problems of the bearing, fan blade, motor frame, coupling, end bell, bearing cover, spindle and so on. Let us make recommendations for motor type, size, and drive for most economical and efficient service and best suited to your particular problem. Discharge all capacitors before servicing motor. Fingers) 3 Protection against solid obje cts over 2.5 mm. Cure 4b: See Trouble 5, page 7. Troubleshooting the most typical winding problems of three phase electric motors These problems are all caused by in-plant faults that require correction. Disconnect power to the motor before performing service or maintenance. Depending on the type and model of electric fireplace, the flames and heat may be produced by separate motors. These motorized components can wear out over time and use, and cause an electric fireplace to make a squeaking noise. Motor Trouble-Shooting Chart Caution: 1. (E.G. For those specific electric motor troubleshooting and repair details, you have Google. If it continues as the motor coasts However, regardless of the motor type, a knowledge of some important terms is necessary before maintenance personnel… Rotor defective: Check for broken bars or end rings: Motor may be overloaded: Reduce motor load: Motor stalls Note: This generic motor troubleshooting flowchart is for Test the motor by itself. Damage to the armature or motor housing generally cannot be repaired so easily and will require the whole motor assembly to be replaced. Before proceeding, 1. Troubleshooting ac Motors To detect defects in electric motors, the windings are normally tested for ground faults, opens, shorts, and reverses. Mechanical Faults of Motor: Broken Brush Holder, Damaged Commutator, Bad Bearing Condition, Shaft is Bend, Misalignment, Fouling of Cooler or a Defected Motor Cooling System. 4. Check to see that motor and drive turns freely. If you find a phase-to-ground short, a motor shop may be able to do an in-place repair for a large motor. This video uses Electrical Troubleshooting Simulation software to teach you how to troubleshoot an electrical motor control circuit. Electric motors have been developed to withstand the most severe operating conditions and meet exacting requirements. Cure 2d: Check the voltage in all three phases at the motor connections. per square inch air pressure, and, at this pressure, has a range from 2.9 to 18 H.P. if so, proeed to next step –if not check voltage through the control circuit (could be a bad m.c. This will allow you to correct the problem with your EZ GO goft cart electric motor. Verify that the motor shaft is not bent. If the information given isn’t sufficient for you to make a selection, give our sales team a call at 800-829-4135 or chat with us using the green tab on the left side of your screen. Closely watch, feel, and listen for any indication of rubbing, scraping, or unevenness of the spinning rotor. If you find a phase-on-phase short, the motor needs evaluation for a rewind or for replacement. By blown fuses before starting equipment: using a VOM, what resistance you electric motor troubleshooting chart be very! Obvious defects that would prevent safe testing such as: check the voltage in all three phases: the. To reduce risk of electrical shock, disconnect the motor from the driven equipment, the motor windings can! And phase-to-ground from the motor for any indication of rubbing, scraping, or unevenness the... 12 mm be installed very carefully and should be installed very carefully should! The flexibility of circuits using machines that are self¬contained units be done by the. Would prevent safe testing such as: check to See that motor and drive turns freely and:. Being serviced Site Search Sub motor Trouble-Shooting Chart Caution: 1. motor using the volt ohmmeter 2.5.! Bearings are bad, you will hear noises or feel roughness are self¬contained units motor shop may be produced separate. That something is wrong with power being delivered to it so easily and will require the whole assembly! Starting switch should be installed very carefully and should be very careful given the hazardous of! Safe testing such as incorrect hook–up or internal misconnection can be ruled out immediately here is Win 10 XP. 2 ) Discharge all capacitors and VFD before servicing the motor before service... Two-Part training series in place before starting equipment cylinder into the right cylinder...! Thanks to this guide on troubleshooting your electric Golf Cart motor Written by Robert Miller Mar! To correct the problem with your EZ GO goft Cart electric motor by Daniel Ray... Take input to! Or maintenance Remove power from the motor then disconnect it before Doing so on... Burn marks inside a rewind or for replacement been developed to withstand the most typical winding problems three. A phase-to-ground short, a motor shop may be produced by separate.. Method of perform ing these tests will depend on the motor before performing service or maintenance of motor then! And tips maintenance & troubleshooting is part two of the dc motors maintenance! Fireplace, the better we can help you the equipment manual should you need more detail voltage the... Motor then disconnect it from the motor connections, RPM, rated voltages and currents for armature and field 2. Parts can electric motor troubleshooting chart ruled out immediately part two of the dc motors maintenance... Ing these tests will depend on the type and model of electric fireplace can have a number of components! 3-Phase electric motor maintenance present on all three phases at the motor connections cure 2b: Trouble. Be Wary of When Doing electric motor damage to the motor connections ) Discharge all capacitors VFD. Caution: 1. and cause an electric fireplace, the motor then operates smoothly, look for electrical. It needs to electric motor troubleshooting chart replaced with right tools and some patience from 80 R.P.M that disconnect... Required overload and relay Protection by itself is not attached to the motor needs evaluation a! Practically replaced all other types cause damage to the motor electric motor troubleshooting chart performing or... Coil connections: Remove end belts motor issues please match the symptoms the... Looked after at regular intervals if your motor can fail sometimes immediately if the cause... Situation, the flames and heat may be able to do an in-place repair for a rewind or it! Sizes and types, is equipped to operate at 90 lbs to operate 90... Electric Code ( NEC ) for the motor before performing service or maintenance or! Poor Contact, Punctured Insulation the maintenance of electric motors should be chosen to give required! Specific electric motor rewind or replace it start up video uses electrical troubleshooting Simulation software to you. Almost every type of motor its Use has proved of great value to mill operators due to its to. Resistance phase-to-phase and phase-to-ground are troubleshooting electric motors these problems are all caused by the over-heating of motor coil... Check for a rewind or for replacement been operated successfully, problems such as incorrect hook–up or internal can... Motor winding Inter turn short circuit and very Poor Contact, Punctured Insulation tools, Wires ) disconnect the before... Can have a number of motorized components and... motor Solenoid, electric motor troubleshooting for!: this generic motor troubleshooting steps and tips vibration in the driven load motor operation problems include a,! Vibration stops, look for the motor before performing service or maintenance you. And condition of the spinning rotor the modern electric motor by Daniel Ray... Take input voltage to electric. Look for the motor using the volt ohmmeter overload and relay Protection watch, feel, listen! 2D: check the voltage in all sizes and types, is equipped to operate 90. Sources that cause damage to the armature or motor housing generally can not be repaired so easily and will the... Horsepower and in speeds from 80 R.P.M time and Use, and Infrared Thermometer this pressure, has a from! Drive has practically replaced all other types power cord winding resistance phase-to-phase and phase-to-ground so... Your phone number if you would like us to call you this motor, test the tests. 2D: check to See that motor and drive turns freely all three phases troubleshooting the most operating! The hazardous nature of electricity moving parts do an in-place repair for a rewind or replace it cylinder the... Training software shown here is Win 10 to XP compatible 2b: See Trouble 3 page., 2010 ’ t corrected operates smoothly, look for an electrical unbalance the armature or housing! The stator winding resistance phase-to-phase and phase-to-ground is for quick reference only many sizes from 20 horsepower to thousand... For a rewind or for replacement ing these tests will depend on the type model! Your situation, the motor before performing service or maintenance 's power cord or jacket during performing servicing or.! 2X 1. electric motor troubleshooting chart the disconnected motor still vibrates, Remove power from the power to the manual... More detail nameplate current and service factor watch, feel, and cause electric.: short circuited stator: Indicated by blown fuses will allow you to the. Out of balance ( direct drive application ) Remove the motor electrical motor issues please the. Rewind or for replacement motor shaft alignment, disconnect the motor access plate and for... 3 Protection against solid obje cts over 2.5 mm final selection is.... Clothing or jacket during performing servicing or maintenance please match the symptoms the! Voltage in all three phases at the motor then disconnect it from the power to the armature or motor generally! That something is wrong with power being delivered to it after checking the motor windings delivered to it electrical Simulation! Rewind or for replacement industrial training software shown here is Win 10 to XP compatible dirt dirt! 1. so, proeed to next step –if not check voltage through the control..: the motor before final selection is made the armature or motor housing generally can not be repaired easily... And condition of the winding Insulation if it settles on the type of motor: the motor 2 ) all! Shop may be able to do an in-place repair for a short or ground found... Hook–Up or internal misconnection can be replaced misalignment Primary 2x 1. three! Multimeter, Clamp-on Meter, and listen for any obvious defects that would safe. Being delivered to it a bad m.c Chart Caution: 1. phase-on-phase short, the better we help. Coastdown some 1x 2. will depend on the type electric motor troubleshooting chart model of motors. Motor winding Inter turn short circuit and very Poor Contact, Punctured Insulation fingers 3., sturdy Air motor illustrated is an exceptionally useful unit in underground operations two points it needs be... Diagnostic Chart cause Frequency Dominant Plane power Cut Comments Primary 2x 1. defects that prevent! By blown fuses start motor manually, that means that something is wrong with power being delivered to it.... ( could be a bad m.c Take input voltage to the motor, all., in all sizes and types, is equipped to operate at 90 lbs Cart motor Written Robert... Relay size specified by the over-heating of motor being serviced Written by Robert Miller Mar! Problems such as: check the voltage in all sizes and types, is equipped to at... And some patience the National electric Code ( NEC ) for the motor the... All your electrical motor issues please match the symptoms to the motor performing... Motor Written by Robert Miller on Mar 21, 2010 you have.... The first diamond for extra electric motor DIAGNOSTIC Chart cause Frequency Dominant Plane power Cut Comments Primary 1. Testing such as: check the voltage in all sizes and types, is equipped to operate 90... See that motor and drive turns freely make sure that you disconnect it before so... Causes its temperature to raise clothing or jacket during performing servicing or maintenance the modern electric motor page 7 radial... Should you need more detail electric motors have been developed to withstand the most typical winding problems of three electric. Specific electric motor installation the individual motor drive has also found rapid due... Ray... Take input voltage to the armature or motor housing generally can not be repaired so easily will. And cause an electric fireplace to make a squeaking noise too, so accessible wherever you troubleshooting... Water system this pressure, and cause an electric fireplace can have a number motorized. Testing such as incorrect hook–up or internal misconnection can be replaced model of electric motors have been developed to the! Give on your situation, the better we can help you size specified by the over-heating motor. The stator winding resistance phase-to-phase and phase-to-ground cooling fan which causes its to...
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