More importantly, you need to understand basic safety rules. Practical troubleshooting of electrical equipment and control. This is a basic course, without any prerequisites, that. The following steps must be taken to help diagnose a possible cart fault or faulty controller. Troubleshooting control circuits simutech multimedia. It may be useful for learning troubleshooting for repairing devices and things of that nature. Electronic troubleshooting electronics circuit simulator. First make sure the problem is not something simple such as an unplugged device or a. This symbol indicates instructions to be strictly followed for the radio remote control to work properly.
However, im quite new to circuit modification and soldering and so i have had a difficult time troubleshooting. 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. Within the passive filter circuit troubleshooting there are three subsections. In troubleshooting, new information is provided by coincidences. Rc low pass filter troubleshooting, simple filters, and complex filters. Lets develop our procedure for troubleshooting an open circuit in the control circuit. By now, the participant will be able to check all the basic electronic components on electronic circuit board. Nnnnnnn control manifold gp 5 6v7687 locknut 3 8t4192 bolt 8t4223. Motor circuit breakers and switchboards purpose and duty clearance times types troubleshooting variable speed drives fundamentals of variable speed drives problems associated with variable speed drives terminology used manufacturers literature what they dont tell you minimisation of equipment failure. Fortunately, electrical circuit troubleshooting is an activity that works well for small groups of students to engage in as well as individual students. A virtual troubleshooting exercise such as this one is a good way to start students thinking in the right ways to becoming effective troubleshooters. Line circuit breaker the line circuit breakers protect the ac power leads connected to the genset from overloads and equipment short circuits.
Sharpen and improve these skills with continued handson training. The parts book is the only book sent as a pdf with the machine. Cannot get the wiring answered by a verified technician. An electrician is troubleshooting a faulty light circuit, where the power source and light bulb are far removed from one another. 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. What would you recommend as the next voltmeter measurement to take in troubleshooting the. I drew out a diagram of a motor control circuit with a simple start, stop and emergency buttons.
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. Start studying control circuit and motor troubleshooting. Unit 1 basic principles of motor controls different manufacturers of control devices, as well as books about motor controls, use different methods of showing the control circuit wiring. Troubleshooting electrical control circuits industrial wiki. Electrical circuit troubleshooting guide by joshua lee 1. A connection diagram is a picture or a physical representation of a circuit. Facility electrical control circuits wiki odesie by tech. Check current in controllers m motor field lead while circuit. The circuit troubleshooting handbook gives you full descriptions of the operation of important circuits. In the most general sense a coincidence occurs when a value at one particular point in the circuit can be deduced in a number of different ways. Does the circuit make a continuous path from one battery terminal to the other. Diodes and diode circuits tlt8016 basic analog circuits 20052006 8 half wave rectifier with smoothing capacitor figure 3. A complete path is required before current can flow through resistances to perform work.
Current is defined as the flow of electrons and is measured in amperes. Upon a call for heat the switch between red and white closes, this sends the hot leg of 24 volts out on the white circuit which is the heat circuit. Some of the voltages found in electronic equipment are lethal. The trouble is that when measuring the voltage polarity on the wires during nonalarm times, the measured polarity is wrong for the horn or strobe. The troubleshooting information in chapters 3 through 9 is in a form made up of paths consisting of statements followed by y yes and n no. This simple troubleshooting technique is applicable to a wide variety of electrical, electronic, and other types of systems. This symbols indicates useful suggestions for the proper use of the radio remote control. If the statement is true, follow the for chapter 1, introduction. And it shows you how each circuit s characteristics may figure in its failure or poor performance. And it shows you how each circuits characteristics may figure in its failure or poor performance.
A ladder diagram is a schematic representation of a circuit. Jan 09, 2003 anytime there is a malfunction in the defrost circuit, the compressor will soon feel the results. First make sure the problem is not something simple such as an unplugged device or a tripped circuit breaker. Ideally, a computerbased failure log is optimal, so that failures may be referenced by and correlated to a number of factors such as time, date, and environmental conditions.
Peak inverse voltage peak inverse voltage piv across the diode. When applicable, sections in appendix a are referred to for additional information. Basic electricity current, voltage, and resistance ohms law and calculations seriesparallel circuits kirchhoffs laws and corollaries. Diagrams that show every electrical part in a circuit can become complex. Basics of multimeters analog and digital multimeters solenoid meters accessories. The contactor k remains energized as long as the control contact is in a close condition. Practical troubleshooting of electrical equipment and control circuits will help engineers and technicians to identify, prevent and fix common electrical equipment and control circuits. Basic troubleshooting pid temperature controller all. 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. Just to be sure the wiring is not the problem, here is the test for your machine. General troubleshooting tips troubleshooting theory and. In this updated edition of his bestselling guide, homer davidson, master of consumer electronics, provides wizardly handson advice on troubleshooting and repairing a wide range of electronic devices without the benefit of schematic diagrams. Basic troubleshooting strategies all about circuits.
Troubleshooting electrical control circuits 3 day learn to wire, operate, and troubleshoot a circuit before noon, day 1. Power issues can also cause devices to intermittently trip or fail altogether. Although the content is geared towards control circuits, the techniques for. I believe the technical specs are available at the above link have been made in our lab and i have been using these as a guideline. Troubleshooting an open circuit faults in the control. Electrical circuit troubleshooting guide mindmeister mind map.
Air conditioner troubleshooting good ac repair tips 1 how to. For example, in figure b1, the control wiring from the startstop pushbutton station runs to the actual connection points 1, 2, and 3. Basic control circuit for dol directonline starter. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Are the connections attached via a conductive material. The test leads are connected in parallel across the circuit load. The unexpected behavior exhibited by the circuit is due to improper locating or soldering of components, component damage due to aging, faults, overheat, and so on. Circuit troubleshooting handbook software development s. Refer to the important information in the 1995 arrl handbook safety and troubleshooting chapters. What would you recommend as the next voltmeter measurement to take in troubleshooting the circuit, following the same divide in half. 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. Questionsanswers and presentation certificate of attendance. Troubleshooting of an electronic circuit is a process of having a special outlook on components that comes out with remedies to repair it.
There is a control transformer that takes the 230 volts to 115 volts to use for the control circuit. Control fuse f2 this fuse provides short circuit protection for the autochoke and fuel pump circuits on gasoline models. It requires you to follow specific and systematic procedures. Troubleshooting electrical control circuits is defined as the logical and orderly process to determine the fault or faults in an electrical control circuit. The control contact may be a level switch contact or a temperature switch contact. To understand how to troubleshoot control circuits, it is very important to understand the working of some basic control circuits, as given in figure 7. To test a participant how well they know about electronic troubleshooting. Anytime there is a malfunction in the defrost circuit, the compressor will soon feel the results. Practical troubleshooting of electronic circuits for. Electrical troubleshooting 3 measuring voltage drop observe the circuit above. The way to obtain new information about the circuit is to make a measurement. Abb ibus knx smart home and intelligent building control product. These manuals are specifically made up for the individual panel, and are generally sufficient for any or all problems which may be encountered. Allstar corporation page 2 document 111994 rev a january 28, 2004 does the problem only affect the open circuit.
Control circuit and motor troubleshooting flashcards quizlet. If a meter of low ohms per volt is used to measure the voltage in a high resistance circuit, the effect of the meter shunting load being measured will result in an inaccurate reading. 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. The thermostat gets the hot leg of the 24 volt control voltage from the transformer which enters the r or red terminal on the thermostat. Check the components that affect the open direction. The voltage output is shortcircuit and overload protected. Diagnose a suspected circuit problem techlibrary juniper. Preventive maintenance will help avoid serious problems by taking care of little problems.
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. Perfect your plc circuit troubleshooting process by troubleshooting more than 60 faults in a safe training environment. Pdf lesson 1 troubleshooting with electrical schematics. 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. Heating and cooling systems need preventive maintenance. Remember that the first three steps will be the same for all faults. Open circuit faults an open circuit fault is any fault that stops the operation of a machine due to an open wire or component. Curtis 1206 sx and mx this sheet is provided to aid in the installation of your remanufactured curtis controller. Or, the new controls may either require cleaner power. Basic circuit troubleshooting worksheet basic electricity. Develop a variety of specific techniques for diagnosing malfunctions in circuits containing. A corollary to this troubleshooting tip is the directive to keep detailed records of failure. If there has been a building or system upgrade recently, the old power supply may be overloaded or unbalanced.
Jan 03, 2016 to understand how to troubleshoot control circuits, it is very important to understand the working of some basic control circuits, as given in figure 7. A basic checklist for any central air conditioner troubleshooting will include checking for blown fuses or tripped circuit breakers. Upon installation, you may encounter problems that may, or may not, be due to a faulty controller. Motor and motor control troubleshooting techniques. This course has greatly helped me troubleshoot electrical controls more effectively. Your professionals will diagnose and repair a variety of faults in a simulated control circuit consisting of relays, pushbuttons, a control transformer, a solenoid lock, a proximity switch, and circuit protection. Troubleshooting control circuits tcc is the second simulation in our series. Learn and determine the operation of plc circuits using ladder diagrams, wiring diagrams, inputoutput schematics, and data sheets. Gather up any background material you may have on hand and then use your senses to inspect the site.
You do need to be able to read a schematic diagram and understand basic circuit functions. Troubleshooting communications problems in building control. Introduction to troubleshooting control circuits youtube. Control change status 1 01 1 nnnn control number occcccc c 127. The emphasis is on practical issues that go beyond typical electrical principles, providing a toolkit of skills in solving electrical problems, ranging from. Why is the voltage on the notification appliance circuit nac. This product teaches proven techniques for troubleshooting control circuits. This symbol indicates important information on avoiding dangerous situations when using the radio remote control. Although the content is geared towards control circuits, the. Problems such as a burnedout or opened defrost clock motor, defrost contacts that are stuck open, a defrost limit switch that is stuck open, a defrost termination switch that is stuck closed, or an opened defrost heater will cause the evaporator.
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