Extech Instruments DCP42 Manual

A SERVICE OF

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DCP42‐en‐GB_V1.512/14

19

11. Troubleshooting

OUP:OverVoltageProtection

Thisunithasabuilt‐intrackingovervoltageprotectionfeature.Intheeventofoutputvoltage

becominggreaterthanthesetvalue(seespecifiedrangefromspecificationstable),protection

willbetriggeredandtheoutputpowerwillbecutoffandOUPwarningappearsasbelow.



Toresetthewarning,switchofftheunitandremoveallloading.

Switchtheunitbackonagainanditshould resumenormaloperation.

Ifthisproblempersists,pleasecontactthecustomercaredepartmentorthepointofpurchase.



OTP:OverTemperatureProtection

Thereisathermosensorinsidetheunittomonitorandpreventtheunitfromundulyheating

internally.WhenanOTPerroroccurs,thereisnooutputandthefollowingwarningwillappear

ontheLEDdisplay.



Whenthiswarningappears,switchofftheunitandremoveallloading.

Checktheloadandoutputsetting.Allowtheunittocoolforatleast30minutes.

Checktoseeifanyventilationholesareblocked,alsocheckthatthereissufficientclearance

aroundthepowersupply.

Listencarefullyfortheshortwindsoundemanatingfromthecoolingfanwhentheunitis

switchedONagain.Ifthewindsoundisnotdetected,thefanmaybefaulty;donotusethe

powersupplyinthiscase,contactthecustomercaredepartmentortheagentfromthepointof

purchase.



OCP:OverCurrentProtection

NormallytheoverloadprotectionissustainedbytheCCconstantcurrentmode.WhentheCC

modefailsandgoesundetected,seriousdamagetothetestpieceorloadmayoccur.TheOCPis

usedtominimizetheextentofdamagetotheloadsintheeventofpowersupplyfailure.

Switchoffthepowersupplyassoonasthiswarningisseen(asshownbelow).



Toresetthiswarning,removeallloadingandpresstheOUTPUTON/OFFbutton.

Switchtheunitbackonagainanddoublecheckwithcaution.

Ifthisproblempersists,pleasecontactthecustomercaredepartmentorconsultwiththeagent

atthepointofpurchase.





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