Electrician Training - A Systematic Approach to Trouble shooting and Electrical Fault Finding These rules and procedures govern the methods you can use to. During the course the delegates will cover the following subject areas in depth. Safe isolation and isolation procedures. Locking off. Test instruments and readings. Circuit diagrams. Reference and test points. Motor testing (insulation, continuity) Motor starter control circuits. Here is a simple 5 point fault finding method to help you find and fix fitting techniques while at the same time learning the theory behind them.


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Electrician Training - A Systematic Approach to Trouble shooting and Electrical Fault Finding

Technicians with good troubleshooting skills are vital to ensure plant fault finding techniques up and running in the shortest period of time. This is the best time to give the equipment a thorough inspection using all your senses.

Look for signs of mechanical damage, overheating, unusual sounds, smells etc.


Make note of fault finding techniques feature that is not operating properly. Make sure you observe these operations very carefully. This can give you a lot of valuable information regarding all parts of the equipment.

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Step 2 — Define Problem Area It is at this stage that you apply logic and reasoning to your observations to determine the problem area of the malfunctioning equipment.

Often times when equipment malfunctions, certain parts of the equipment fault finding techniques work properly while others not.

Electrical Fault-finding & Troubleshooting

The key is to use your observations from step 1 to rule out parts of the equipment or circuitry that are operating properly and not contributing to the cause of the malfunction.

You should continue to do fault finding techniques until you are left with only the part s that if faulty, could cause the symptoms that the equipment is experiencing.

To help you define the problem area you should have a schematic diagram of the circuit in addition to your noted observations. Starting with the fault finding techniques circuit as the problem area, take each noted observation and ask yourself "what does this tell me about the circuit operation?

Fault finding techniques - An introduction

As you eliminate each part of the circuit from the problem area, make sure to identify them on your schematic. This will help you keep track fault finding techniques all your information.


Step 3 — Identify Possible Causes Once the problem area fault finding techniques have been defined, it is necessary to identify all the possible causes of the malfunction. This typically involves every component in the problem area s.

It is necessary to list actually write down every fault which could cause the problem no matter how remote the possibility of it occurring. Use your initial observations to help you do fault finding techniques.

Fault finding techniques - An introduction

During the next step you will eliminate those which are not likely to happen. However, the faults produce different values at the fault finding techniques of the gate, hence they are distinguished. If the output value on x8 will be 0, F1 is present. Otherwise, if the output value on x8 will be 1, either F2 is present or none of the faults F1 and F2 are present.

Guided-Probe Testing Guided-probe testing extends edge-pin testing process by monitoring internal signals in the UUT via a probe fault finding techniques is moved usually by an operator following the guidance provided by the test equipment. The principle of guided-probe testing is to backtrace an error from the primary output where it has been observed during edge-pin testing to its physical location in the UUT.

Probing is carried out step-by-step. In each step an internal signal is probed and compared to the expected value.

Electrician Training: Troubleshooting and fault finding

The next probing depends on the result of the previous step. A diagnostic tree can be created for the given test pattern to control the process of probing. The tree consists of internal nodes circles to mark the fault finding techniques lines to be probed, and of terminal nodes rectangles to show the possible fault finding techniques of diagnosis.

The results of probing are indicated as passed P or failed F. Typical faults located are opens and defective components.

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