Check for 110120 vac at the ac inputs on the motor controller. 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 stop and start float leds should illuminate 11. Describes the analog circuit board tors engine sensors for abnormal conditions, such inputs and outputs. Troubleshooting electrical control circuits is defined as the logical and orderly process to determine the fault or faults in an electrical control circuit. A virtual troubleshooting exercise such as this one is a good way to start students thinking in the right ways to becoming effective troubleshooters. Because the wiring and the inputs and outputs ios are the most vulnerable. 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. Troubleshooting an open circuit faults in the control circuit eep. As the name suggests, errors occur during the early life of the systems operation. You can usually eliminate simultaneous, unrelated problems as being too unlikely. There is a control transformer that takes the 230 volts to 115 volts to use for the control circuit. General troubleshooting guide for electric circuit. Troubleshooting is the process of tracing and rectifying faults in electricelectronics circuit.
Build typical sensor, relay and coil circuits and then diagnose faults. Plant engineering 12 steps to troubleshooting pneumatic. Basic circuit troubleshooting worksheet basic electricity. The sequence control circuit is widely used in 3 phase. With a 12 volt power source connected to the load, the meter should read a voltage drop equal to the source voltage or 12 volts. Introduction to pneumatics and pneumatic circuit problems. Practical troubleshooting of electronic circuits for engineers and technicians. 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. If internal fault is indicated again, and flame sensor is not shorted. Particular programming errors nonfatal errors nonfatal errors are errors that need your attention, but should not cause improper operation. Troubleshooting electrical motor control circuits cbt. Find the power control box for outlet and verify that specified circuit has not been tripped. The purpose of the mixer is to function as a multichannel audio signal ampli.
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. Troubleshooting an open circuit faults in the control circuit photo credit. When troubleshooting, make sure mains power is disconnected before proceeding to check the printed circuit board to prevent electric shock. Close all open programs before beginning the disk check.
If the circuit board does not operate as indicated in steps 8 through 10 call the factory. The first training module is an introduction to electrical troubleshooting with text and audio narration. The powercommand control continuously moni table 430. Split airconditioner control troubleshooting guide.
Provide detailed general troubleshooting procedures. Optimization of the wiring in the sequence control circuit ieee xplore. This article outlines communications problems that crop up in todays multilayered building control system and provides a highlevel guide to identifying their source. Follow the wiring steps in the user manual to reconnect wiring. Plant engineering 12 steps to troubleshooting pneumatic systems. Troubleshooting and maintenance guide hewlett packard. Practical troubleshooting of electrical equipment and control circuits will help engineers and technicians to identify, prevent and fix common electrical equipment and control circuits. The included 32 page electrical troubleshooting pdf lab manual also provides more introduction to troubleshooting control circuits. 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. Troubleshooting an open circuit faults in the control.
Control circuit and motor troubleshooting flashcards quizlet. Troubleshooting electrical controls how to troubleshoot. Unfortunately, the drives control circuit may not be able to handle such an event. The lab manual can be accessed via the software and you can also optionally print it out for a hard copy. As murphys law would predict, electrical control system issues usually happen with the. As an industrial electrician, youll encounter many complex electrical circuits and drives that will break down as they age. 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. First make sure the problem is not something simple such as an unplugged device or a tripped circuit breaker. White rodgers 50a55 troubleshooting manual pdf download. Wait until all red led lights have gone off on the motor control board before. Critique this technicians troubleshooting job, noting any errors or unnecessary steps.
There are many ways to solve this problem, but the two most costeffective solutions are. Eaton industries gmbh does not accept any liability for any errors. The control will flash 3 on the led until the limit switch closes. Suppose that something goes wrong in this voltage divider circuit, and the load voltage suddenly falls to zero. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Gas furnace fault or error codes for common furnaces. A flashing light indicates the problem is most likely in the. Here is a list of split airconditioner control troubleshooting guide that you can use if you need to troubleshoot your split air conditioner unit.
In a perfect world, the fundamental frequency is the only one present. Turn the power off, unplug the power cable and wait 60 seconds. This is a basic course, without any prerequisites, that. I drew out a diagram of a motor control circuit with a simple start, stop and emergency buttons. If the field device doesnt respond, then its faulty.
The test leads are connected in parallel across the circuit load. If all stations and mv show open circuit, the problem is likely on the common wire. If there is a problem in electric circuit then possible causes may be. This video uses electrical troubleshooting simulation software to teach you how to troubleshoot an electrical motor. This information was obtained by performing teardown inspections of.
Control of pressure after an air receiver tank is necessary so that an actuator receives a steady pressure source without wasting. How to do electrical troubleshooting of electrical motor control circuit. Nov 25, 2017 troubleshooting workflow no light, no power. Mar 10, 2004 12 steps to troubleshooting pneumatic systems troubleshooting a pneumatic system has been considered an art, a science, or just hitormiss luck. The fault could also be many different types, such as, open circuit fault, short circuit fault or a ground fault. Your professionals will learn to diagnose and repair multiple faults, honing their skill at troubleshooting motor circuits. Troubleshooting communications problems in building. Troubleshooting electric motor control circuits wiring. If the field device responds, then the problem lies in the wiring between the device and the output module. This circuit contains such components as limit switches. Solidstate electronic ac motor drives are becoming more. Short circuit a connection that may be closed is called. Here, you will troubleshoot a motor control circuit consisting of a reversing motor controlled garage door. 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.
Start studying control circuit and motor troubleshooting. Cummins powercommand 3100 service manual pdf download. It requires you to follow specific and systematic procedures. 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. Introduction to pneumatics and pneumatic circuit problems for. Three common types of faults that a programmable control system may have are. Troubleshooting control circuits tcc is the second simulation in our series. It also emphasizes how to prepare and read a circuit diagram, as a first. Troubleshooting an open circuit in the control circuit. Ac adjustable speed drives asd have become the most popular variable speed control devices used in.
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. If problems occur that are not covered in this manual, contact the nearest yaskawa. Learn more on how to troubleshoot failed printed circuit boards from global electronic. 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. 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. The application program can use special relay contacts to detect nonfatal errors. Electrical troubleshooting, plc troubleshooting training. This awardwinning electrical training program builds on the basic techniques program. 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.
To make sure, interrupt line or 24 volt thermostat power for a few seconds. No part of this wiring manual may be reproduced in any form. Control of pressure pressure in a pneumatic system must be controlled at two points after the compressor and after the air receiver tank. Navigate electrical troubleshooting for your facility. They do not cause or prevent any mode transitions of the cpu. Students will learn the proper and safe process for troubleshooting industrial and commercial electrical equipment, resulting in reduced costs and downtime. In the minds of maintenance personnel, production managers, and plant managers, the word troubleshooting conjures up images of hours of downtime and lost production. Control of pressure is required after the compressor as a safety for the system. 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. These manuals are specifically made up for the individual panel, and are generally sufficient for any or all problems which may be encountered. Gas furnace fault or error codes for common furnaces gray. Electrical troubleshooting 3 measuring voltage drop observe the circuit above. If the swapped component is indeed faulty, but in such a way that it. In many industrial and commercial plants, automation of any process and associated control relies heavily on motors and adjustable speed drives.
Troubleshooting electrical control circuits industrial wiki. Since the correct voltage is present we must troubleshoot the system in a logical order. 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. Troubleshooting an open circuit faults in the control circuit. After making sure the onoff switch is turned on, check for 110120 vac at the wall outlet. 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. First make sure the problem is not something simple such as an unplugged device or a. For minor problems, troubleshooting requires a little knowledge about the circuit and its components working because it involves checking the connections only. This simple troubleshooting technique is applicable to a wide variety of electrical, electronic, and other types of systems. Troubleshooting communications problems in building control. 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. Although no special tools are needed to troubleshoot modicon plcs, these tools will. 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. Troubleshooting motor circuits tmc is simutech multimedias third troubleshooting simulation.
This simulation explores an industrial garage door circuit. Introduction to troubleshooting control circuits youtube. Practical troubleshooting of electrical equipment and. Practical troubleshooting of electronic circuits for engineers and. Troubleshooting control circuits free downloads and. 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. Probably nothing in engineering is more difficult than finding a fault that only shows up occasionally. It also includes instructions on how to use the tstrainer. Practical troubleshooting of electrical equipment and control. For example, automatic gains control system in a radio receiver. One trick for checking the field device is to test it without using the output module.
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. Introduction to circuit troubleshooting et 150 troubleshooting learning objectives in this lesson you will. An electrician is troubleshooting a faulty light circuit, where the power source and light bulb are far removed from one another. Work handson with our latest fault training panels. Troubleshooting control circuits simutech multimedia. Basic troubleshooting strategies worksheet basic electricity. Fortunately, electrical circuit troubleshooting is an activity that works well for small groups of students to engage in as well as individual students. The control will return to normal operation after the blower off delay is completed. The problem could lie in the controls hardware, it could be caused by wiring faults, it could be introduced by a recent software update the possible sources are endless but downtime costs money, so that support team needs to isolate and fix the problem as soon as possible. Remove the output wiring and connect the field device directly to the power source. Sometimes, the only way to test a circuit is to see how the system reacts to a manual input. Chapter 12 troubleshooting schneider electric documents. 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. Troubleshooting electrical controls how to troubleshoot a.