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Central Heating & Storage Heaters Forum
Some Views On Fault Finding Procedures.
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<blockquote data-quote="SPECIAL LOCATION" data-source="post: 387479" data-attributes="member: 250"><p>IMHO a standard procedure that I tend to adopt.. which applies to almost any reported fault scenario is:-</p><p></p><p>1/ Listen to what the customer has reported, verify times / dates if or when an item previously worked then failed to work.</p><p></p><p>1a) verify if any other work has been done recently.</p><p></p><p>2/ Do NOT assume the everything the customer tells you is factually correct, they may have missed a key point out or added stuff in that is not correct.</p><p></p><p>3/ Identify the key components...</p><p></p><p>All circuits have a i) Supply ii) Control or switch iii) Load iv) some interconnecting cables joining the bits together.</p><p></p><p>4) isolate the load, verify if it is electrically sound, (open circuit / short circuit / wired correctly in the first place?)</p><p></p><p>4a) Try to energise the load via a different source to prove if it is working or not?</p><p></p><p>5) Go through a systematic approach to check power from the supply along cables through control or switch to the load..</p><p></p><p>6) Check that any timers or thermostat control are operating...</p><p></p><p>7) Checking polarity earthing etc.. at all relevant points along the way</p><p></p><p>etc...</p><p></p><p>etc....</p><p></p><p>Just basic step-by-step isolate and prove individual components until the item or items that have failed have been identified.</p><p></p><p>Its normally only when you assume something that you haven't proved that things go belly up.</p><p></p><p> Guinness</p></blockquote><p></p>
[QUOTE="SPECIAL LOCATION, post: 387479, member: 250"] IMHO a standard procedure that I tend to adopt.. which applies to almost any reported fault scenario is:- 1/ Listen to what the customer has reported, verify times / dates if or when an item previously worked then failed to work. 1a) verify if any other work has been done recently. 2/ Do NOT assume the everything the customer tells you is factually correct, they may have missed a key point out or added stuff in that is not correct. 3/ Identify the key components... All circuits have a i) Supply ii) Control or switch iii) Load iv) some interconnecting cables joining the bits together. 4) isolate the load, verify if it is electrically sound, (open circuit / short circuit / wired correctly in the first place?) 4a) Try to energise the load via a different source to prove if it is working or not? 5) Go through a systematic approach to check power from the supply along cables through control or switch to the load.. 6) Check that any timers or thermostat control are operating... 7) Checking polarity earthing etc.. at all relevant points along the way etc... etc.... Just basic step-by-step isolate and prove individual components until the item or items that have failed have been identified. Its normally only when you assume something that you haven't proved that things go belly up. Guinness [/QUOTE]
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