This pocket manual is designed for one purpose to make it simple for you to install, maintain and troubleshoot century pool and spa motors. Remove motor voltage and disengage the motor from the machine that it is running. Failure of this pump will result in the loss of a generator currently producing half of the stations power output. Capacitor on single phase motor may have failed first discharge the capacitor. Download pdf of electric motor maintenance and troubleshooting second edition by augie hand for free pdf free download. Check for local reset button on the motor popped out off see step 3 below. General motor knowledge coupled with specific application knowledge. Disconnect power to the motor before performing service or maintenance.
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 motors usage and failure modes. Maintenance and troubleshooting of electric motors reliance electric posted 11005. Reconnect motor voltage and see if the motor now runs. Failure to properly ground the frame of the motor can cause serious injury to personnel.
Motor controls troubleshooting of electric motors relay. Verify the amp draw of motor versus the nameplate rating. 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. Troubleshooting electric motors presents learners with a practical approach to troubleshooting motors and equipment in electrical systems. An electric motor is used for producing mechanical energy in various applications. If the motor hums, buzzes, or trips the breaker this will generally solve it. When repairing an electric motor,is it necessary to know the number of hours worked to fill out a. Small electric motor repair by josh weber updated july 21, 2017. Then conduct resistance, fuse, and motor tests to help pinpoint the cause of the failure. An electric motor is an extremely handy device which has multiple uses. Grounding should be in accordance with national and. As with all modifications on electric or electronic equipment, make sure that you unplug. The higher the capacitance of the capacitor the more energy it can store.
Some of its common problems include failure to start, motor overheating, noise, and vibration. Electric motor doesnt spin but humsbuzzes compressors etc. Free online electric motor troubleshooting flowchart tool. If your dynaserv is faulty, you must return the drive and motor for replacement or repair. Free pdf download, electric, motor, repair, pdf, robert, rosenberg. Consult your computer or terminal emulator user manual for instructions on. Jacob anderson, the nations leading shopsmith mark v headstock repair expert, shows how to check a shopsmith mark v motors with a multimeter and a capacitor. A motor placed in storage may or may not work, regardless of its physical appearance. Electric motor repair, model repair specifications for low voltage motors, and. A laptop computer with plc programming, communication, and operating programs are a necessary tool in todays modern plant. Electric motor maintenance and troubleshooting pdf. Problems and premature failures often indicate input power system troubles, poor or deteriorating mechanical installations, or malfunctions in. A quality multimeter multitester capable of reading less than one ohm and with a specific diode testing fun electrical tools including cutters, soldering iron. For detailed information on reducing electrical noise in.
Remove power to the motor and repair any damaged or loose connections. Operators are complaining that a large compressor on several occasions has failed to start. Armature winding1920 pdf armature winding and motor repair. Slide a flathead screwdriver between the bearing and the outer casing and you will find you can lift them off easily. To check the capacitor, set the voltohm meter to rx100 scale and touch its probes to. When a motor fails, it is often difficult to see why it failed just by looking at it. Below are some of the frequently asked questions regarding electric motor troubleshooting that have been answered by. Examine the motors electrical connections and terminals. While it is normally not practical to repair small, direct current dc motors that have burned out, other motors can be repaired by rewinding.
A bad motor capacitor may cause starting problems or could shut off the motor while running. An imprint of the brush, signs of arcing or uneven wear indicate the need to remove the motor from service and repair or replace the rings. Participants learn the basics of electric motors including how to maintain and troubleshoot common problems found in the workplace. Arc automatic radio control 08 rpicon 20090710 17 02.
Maintenance and troubleshooting of electric motors esr motor. Electric motor repair equipment whitelegg machines. This course covers the operation and maintenance of ac and dc motors, including 3phase, dual voltage and multiple speed motors. This can save time and lead to faster problem resolution. If power is on to the building, check fuse or circuit breaker serving the electric motor that wont run. Electric motor maintenance and troubleshooting, second edition explains in detail how all types of ac and dc motors work. How to troubleshoot an electric motor capacitor problem. Maintenance and troubleshooting of electric motors. This article describes ac electrical motor troubleshooting. Check that the drive heatsink is free of particles and has a free flow of air over its. Electric motors, gearmotors and drives site search sub motor troubleshooting chart caution. Model repair specifications for low voltage induction motors. Oversized motors add inertia that must be started and stopped frequently. He owned an electric motor repair shop for a number of years, and he taught the electric motor repair course at southwestern technical institute.
Three phase induction motors are one of the most popular electric motors commonly found in processing plants or any manufacturing concern. Motor controls troubleshooting of electric motors free download as powerpoint presentation. Accumulated dirt or poor motor location may prevent the free flow of cooling air around the motor. Whitelegg now offer an unrivalled range of equipment to the electric motor repair industry. When troubleshooting a system as complex as a motor and drive, sometimes its hard to know where to start. Troubleshooting a small electric motor that fails is most effective when you follow a stepbystep procedure that rules out potential causes and helps isolate defective circuits or components. Gather up any background material you may have on hand and then use your senses to inspect the site. Note this is the same password you use to save a configuration in avaya manager program. Troubleshooting ecm motors check high voltage at motor pins 4, 5 of five pin connector. By checking the supply voltage, current, and frequency first, you can rule out problems that might affect the motor drive or breaker circuits. Wipe the place where the bearings were situated using a clean cloth. Ac electric motor troubleshooting guide test procedures. Electrical troubleshooting shopsmith mark v motors youtube.
Motor capacitors store electrical energy for the motor to use. Troubleshooting electric motor problems made easy for you. If an electric motor operates at too high a voltage, excess current flowing through the windings can cause them to become hot and burn out. If the motor problems cant be resolved with this list. Pry out the bearings on the top and bottom half of the ac motor one set at the front and back of each half. In addition dc generator, dc motor types and applications are. Kota have reached the technical and operational characteristics that make them the leaders in the market of outboard electric motors. If no voltage is found, check for voltage at the electric panel. The modern electric motor installation the individual motor drive has practically replaced all other types. This document is a summary of recommendations against. How to troubleshoot a 3phase electric motor hunker. They are used in situations where large power is required.
Motor overloaded or jammed inspect to see that the load is free. Read the following passages to understand more about recognizing and troubleshooting these problems. Properly installed and maintained lincoln electric polyphase ac induction motors operated within the nameplate ratings will run trouble free for many years. Electric motor maintenance and troubleshooting by augie hand. Check for voltage at the pump motor or pump controls. In this article we provide a diagnostic guide to determine and repair problems with electric motors. This textworkbook provides a framework for acquiring the technical knowledge and applied skills needed by maintenance electricians and those in related. Electric motor maintenance and troubleshooting, 2nd.
These motors usually function without many problems, but they do require maintenance and repairs at times. Contrary to what you may be thinking just n o w, your last name doesnt have to be edison in order to p r operly service the motors shown in the following pages. Augie hand had 30 years of handson experience in repairing and troubleshooting motors, followed by 15 years of giving seminars on the subject for electric motor repair shop technicians and inhouse training for large industry maintenance technicians. Practical solutions to power quality problems for engineers and technicians practical communications and automation for electrical networks. Basic electrical troubleshooting a boiler feed pump being powered by two 3500 hp inducti on motors appears to be developing a problem. Check manual release to be sure it operates properly. Post a question or comment about how to troubleshoot electric motors such as air conditioning compressor motors, heating equipment burner or fan motors, swimming pool motors, water well pump motors. Main motor windings and all accessory devices associated with the work area are disconnected from electrical power sources. The page top photo was taken of of an oil burner electric motor not an air conditioning blower fan motor or pump motor, but youll see that all of these electric motors look a lot alike.
An indepth troubleshooting guide to help you with your ac electric motor issues. By checking the supply voltage, current, and frequency first, you can rule out problems that might affect the. Unit 16 electric motors objectives after studying this unit, the student will be able to state the purpose of an electric motor. Essential for anyone who needs to buy, install, troubleshoot, maintain, or repair small to industrialsize electric motors, this practical guide contains new information on threephase motors along with coverage of the. Unit 16 electric motors washington state university. Ac electric motors best practice manufacturing designconstruction related features in ac motors that lead to longer service life and higher productivity 1 engineers must select a proper motor that meets rms torque requirements.
Within the industrial troubleshooting realm today, electrical troubleshooting also requires great computer skills. Electric motor maintenance and troubleshooting, 2nd edition, augie. Electric compressor motor that isnt starting by itself. The challenge for the service technician is to one approach is to maintain a library of reference materials along with a formalized troubleshooting procedure for on the job use. Motor and motor control troubleshooting techniques. How to troubleshoot motors and drives, starting at the inputs. Troubleshooting in the field motor testing motor controller programmable logic controllers plc. No matter how urgent the problem and motor failure can cause some very urgent problems always develop a plan of attack before you start repair work. Electric motor troubleshooting questions about electric. Therefore, motor troubleshooting involves the entire system.
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