Ac adjustable speed drives asd have become the most popular variable speed control devices used in. Repair manual, by providing additional circuit details and a complete theory of operation, as well as troubleshooting information and the correction of errors that were present in the circuit diagram published in the olympus manual. This simple troubleshooting technique is applicable to a wide variety of electrical, electronic, and other types of systems. Gas furnace fault or error codes for common furnaces gray. Troubleshooting an open circuit faults in the control circuit photo credit. Unfortunately, the drives control circuit may not be able to handle such an event. Troubleshooting electrical control circuits industrial wiki. Control of pressure pressure in a pneumatic system must be controlled at two points after the compressor and after the air receiver tank. The application program can use special relay contacts to detect nonfatal errors. Troubleshooting an open circuit faults in the control circuit eep. The included 32 page electrical troubleshooting pdf lab manual also provides more introduction to troubleshooting control circuits. Wait until all red led lights have gone off on the motor control board before. If internal fault is indicated again, and flame sensor is not shorted.
This circuit contains such components as limit switches. General troubleshooting guide for electric circuit. About 70% of the time is spent working, handson, at a troubleshooting station with motor control circuits operating at a safe, low level of 24 volts. Troubleshooting more complex control circuits tank fill control duplex pump control day one basic principles industrial electricity single and three phase power systems meters used in troubleshooting clamp on ammetermegohmmeter devices, symbols and circuits devices and symbols language of control circuits. Introduction to troubleshooting control circuits youtube.
Practical troubleshooting of electrical equipment and control. In the minds of maintenance personnel, production managers, and plant managers, the word troubleshooting conjures up images of hours of downtime and lost production. Sometimes a circuit might develop some sort of a defect or fault and it is necessary to carry out electrical troubleshooting in such a case. Solidstate electronic ac motor drives are becoming more. Because the wiring and the inputs and outputs ios are the most vulnerable.
Particular programming errors nonfatal errors nonfatal errors are errors that need your attention, but should not cause improper operation. Cummins powercommand 3100 service manual pdf download. Short circuit a connection that may be closed is called. One trick for checking the field device is to test it without using the output module. If there is a problem in electric circuit then possible causes may be. I drew out a diagram of a motor control circuit with a simple start, stop and emergency buttons. Troubleshooting communications problems in building control. The sequence control circuit is widely used in 3 phase.
As the name suggests, errors occur during the early life of the systems operation. If all stations and mv show open circuit, the problem is likely on the common wire. This fault could be located in either the power circuit or the control circuit. Sometimes, the only way to test a circuit is to see how the system reacts to a manual input.
Although no special tools are needed to troubleshoot modicon plcs, these tools will. Electrical troubleshooting, plc troubleshooting training. Find the power control box for outlet and verify that specified circuit has not been tripped. The emphasis is on practical issues that go beyond typical electrical principles, providing a toolkit of skills in solving electrical problems, ranging from. This article outlines communications problems that crop up in todays multilayered building control system and provides a highlevel guide to identifying their source. A virtual troubleshooting exercise such as this one is a good way to start students thinking in the right ways to becoming effective troubleshooters. These manuals are specifically made up for the individual panel, and are generally sufficient for any or all problems which may be encountered. Nov 25, 2017 troubleshooting workflow no light, no power.
Electrical troubleshooting 3 measuring voltage drop observe the circuit above. Troubleshooting electrical controls how to troubleshoot. There is a control transformer that takes the 230 volts to 115 volts to use for the control circuit. Remove the output wiring and connect the field device directly to the power source. The powercommand control continuously moni table 430. Ac voltage source tb1 tb2 tb5 tb4 tb6 tb3 light as you can see in the diagram, there are several terminal blocks tb through which electrical power is routed to the light bulb. Control of pressure after an air receiver tank is necessary so that an actuator receives a steady pressure source without wasting. The lab manual can be accessed via the software and you can also optionally print it out for a hard copy. It also emphasizes how to prepare and read a circuit diagram, as a first.
If the field device responds, then the problem lies in the wiring between the device and the output module. The first training module is an introduction to electrical troubleshooting with text and audio narration. If the swapped component is indeed faulty, but in such a way that it. Critique this technicians troubleshooting job, noting any errors or unnecessary steps. The control will flash 3 on the led until the limit switch closes. A technician following the divideandconquer troubleshooting strategy begins by measuring voltage across the lower resistor finding 0 volts, then measuring voltage across both resistors finding 12 volts. The test leads are connected in parallel across the circuit load.
Chapter 12 troubleshooting schneider electric documents. Optimization of the wiring in the sequence control circuit ieee xplore. Fortunately, electrical circuit troubleshooting is an activity that works well for small groups of students to engage in as well as individual students. For example, automatic gains control system in a radio receiver. Follow the wiring steps in the user manual to reconnect wiring.
White rodgers 50a55 troubleshooting manual pdf download. A flashing light indicates the problem is most likely in the. Probably nothing in engineering is more difficult than finding a fault that only shows up occasionally. This simulation explores an industrial garage door circuit. This video uses electrical troubleshooting simulation software to teach you how to troubleshoot an electrical motor. Troubleshooting an open circuit faults in the control circuit.
Split airconditioner control troubleshooting guide here is a list of split airconditioner control troubleshooting guide that you can use if you need to troubleshoot your split air conditioner unit. Practical troubleshooting of electronic circuits for engineers and technicians. The purpose of the mixer is to function as a multichannel audio signal ampli. To make sure, interrupt line or 24 volt thermostat power for a few seconds. Mar 10, 2004 12 steps to troubleshooting pneumatic systems troubleshooting a pneumatic system has been considered an art, a science, or just hitormiss luck. Troubleshooting electrical control circuits is defined as the logical and orderly process to determine the fault or faults in an electrical control circuit. Control circuit and motor troubleshooting flashcards quizlet. By the time youre about halfway done, the way the system works will start to make sense, and the rest of the circuit will seem easier to trace out. Introduction to pneumatics and pneumatic circuit problems for. Troubleshooting is the process that determines the cause of the problem in the electronic circuit by examining the affected area of it, and then by taking appropriate action. The fault could also be many different types, such as, open circuit fault, short circuit fault or a ground fault. Here, you will troubleshoot a motor control circuit consisting of a reversing motor controlled garage door. Troubleshooting control circuits tcc is the second simulation in our series. As murphys law would predict, electrical control system issues usually happen with the.
Troubleshooting an open circuit in the control circuit. This is a basic course, without any prerequisites, that. If problems occur that are not covered in this manual, contact the nearest yaskawa. Chances are, you wont be an expert in repairing these devices, but you can take some practical steps to solve problems and help get your systems operational again in a timely manner. We have been learning about some interesting facts and circuits related to digital electronics such as ghost detection circuit, basic tubelight circuit, dc to dc charger and so forth.
Since the correct voltage is present we must troubleshoot the system in a logical order. When troubleshooting, make sure mains power is disconnected before proceeding to check the printed circuit board to prevent electric shock. Turn the power off, unplug the power cable and wait 60 seconds. Troubleshooting electrical motor control circuits cbt. Troubleshooting and maintenance guide hewlett packard. Three common types of faults that a programmable control system may have are. If the circuit board does not operate as indicated in steps 8 through 10 call the factory. Your professionals will learn to diagnose and repair multiple faults, honing their skill at troubleshooting motor circuits. Troubleshooting table 129 basic defi nitions 129 chapter 18 refrigerators and freezers 1 photograph of a refrigerated storage unit 1 purpose of refrigerated storage units 2 operation principles 2 installation requirements 3 refrigerator control circuit 4 refrigerator operation 4 refrigerator routine maintenance 5. The stop and start float leds should illuminate 11. Troubleshooting and using circuit laws gaining circuit familiarity troubleshooting basics common troubleshooting techniques the program the practical troubleshooting of electronic circuits workshop will teach you how to recognise and efficiently troubleshoot common electronic component and circuit problems. No part of this wiring manual may be reproduced in any form. Basic circuit troubleshooting worksheet basic electricity. Learn vocabulary, terms, and more with flashcards, games, and other study tools.
Esplxme control system faq troubleshooting guide 3 wire and the field common wire wire connected to the common wire terminal and the second valve solenoid wire. Split airconditioner control troubleshooting guide. Eaton industries gmbh does not accept any liability for any errors. Start studying control circuit and motor troubleshooting. Gas furnace fault or error codes for common furnaces. Students will learn the proper and safe process for troubleshooting industrial and commercial electrical equipment, resulting in reduced costs and downtime. Auxiliary relays plug top filter, lights, a1 and a2 bottom a3a6 four amp fuse protects actuator circuit valves 14 harness plugs for actuators heater 1 and 2 terminal block to the rectifiers. First make sure the problem is not something simple such as an unplugged device or a tripped circuit breaker. After making sure the onoff switch is turned on, check for 110120 vac at the wall outlet. Close all open programs before beginning the disk check. When the switch recloses or the call for heat is lost, the control runs the induced draft motor through postpurge and runs the indoor blower through the selected fan off delay. How to do electrical troubleshooting of electrical motor control circuit. It requires you to follow specific and systematic procedures. The green wire from the variable speed motor labeled dehum connects to g on the furnace control if it was previously connected to g on the old style furnace control board.
Troubleshooting an open circuit faults in the control. Introduction to circuit troubleshooting et 150 troubleshooting learning objectives in this lesson you will. Plant engineering 12 steps to troubleshooting pneumatic. In a perfect world, the fundamental frequency is the only one present. Work handson with our latest fault training panels. Troubleshooting is the process of tracing and rectifying faults in electricelectronics circuit.
First make sure the problem is not something simple such as an unplugged device or a. Navigate electrical troubleshooting for your facility. Jun 08, 2009 if youre troubleshooting a refrigeration control system and dont have a factory schematic, be patient, trace the controls out wire by wire, and draw a careful schematic. There are many ways to solve this problem, but the two most costeffective solutions are. Here is a list of split airconditioner control troubleshooting guide that you can use if you need to troubleshoot your split air conditioner unit. This awardwinning electrical training program builds on the basic techniques program. Build typical sensor, relay and coil circuits and then diagnose faults. Practical troubleshooting of electronic circuits for engineers and. Troubleshooting control circuits free downloads and. Introduction to pneumatics and pneumatic circuit problems. In many industrial and commercial plants, automation of any process and associated control relies heavily on motors and adjustable speed drives. Practical troubleshooting of electrical equipment and control circuits will help engineers and technicians to identify, prevent and fix common electrical equipment and control circuits. As an industrial electrician, youll encounter many complex electrical circuits and drives that will break down as they age. For minor problems, troubleshooting requires a little knowledge about the circuit and its components working because it involves checking the connections only.
Troubleshooting communications problems in building. Practical troubleshooting of electrical equipment and. Describes the analog circuit board tors engine sensors for abnormal conditions, such inputs and outputs. You can usually eliminate simultaneous, unrelated problems as being too unlikely. If the field device doesnt respond, then its faulty. They do not cause or prevent any mode transitions of the cpu. Check for 110120 vac at the ac inputs on the motor controller. An electrician is troubleshooting a faulty light circuit, where the power source and light bulb are far removed from one another. The control will return to normal operation after the blower off delay is completed. Troubleshooting a variable frequency drive newsletter introduction in many industrial and commercial plants, automation of any process and associated control relies heavily on motors and adjustable speed drives. Troubleshooting motor circuits tmc is simutech multimedias third troubleshooting simulation.
Suppose that something goes wrong in this voltage divider circuit, and the load voltage suddenly falls to zero. Plant engineering 12 steps to troubleshooting pneumatic systems. Learn more on how to troubleshoot failed printed circuit boards from global electronic. Because the wiring and the inputs and outputs ios are the most vulnerable elements in a system, be sure to locate and identify these elements in the problem circuit. Control of pressure is required after the compressor as a safety for the system. It also includes instructions on how to use the tstrainer. Provide detailed general troubleshooting procedures. Basic troubleshooting strategies worksheet basic electricity. Troubleshooting electrical controls how to troubleshoot a. Troubleshooting electric motor control circuits wiring. The common wire interconnects the second valve solenoid wires of each valve and mv in the system.
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