Friedrich Kuhl+ KEQ08A11A User Manual

48 PB
COMPONENT TESTING
Compressor Checks
Locked Rotor Voltage (L.R.V.) Test
Lockedrotorvoltage(L.R.V.)istheactualvoltageavailableatthecompressorunderastalledcondition.
Single Phase Connections
Disconnectpowerfromunit.Usingavoltmeter,attachoneleadofthemetertotherun“R”terminalonthecompressorandthe
otherleadtothecommon“C”terminalofthecom-pressor.Restorepowertounit.
Determine L.R.V.
Startthecompressorwiththevoltmeterattached;thenstoptheunit.Attempttorestartthecompressorwithinacouple
ofsecondsandimmediatelyreadthevoltageonthemeter.Thecompressorundertheseconditionswillnotstartandwill
usuallykickoutonoverloadwithinafewsecondssincethepressuresinthesystemwillnothavehadtimetoequalize.Voltage
shouldbeatoraboveminimumvoltageof197VAC,asspeciedontheratingplate.Iflessthanminimum,checkforcauseof
inadequatepowersupply;i.e.,incorrectwiresize,looseelectricalconnections,etc.
Amperage (L.R.A.) Test
Therunningamperageofthecompressoristhemostimportantofthesereadings.Arunningamperagehigherthanthat
indicatedintheperformancedataindicatesthataproblemexistsmechanicallyorelectrically.
Single Phase Running and L.R.A. Test
NOTE:Consultthespecicationandperformancesectionforrunningamperage.TheL.R.A.canalsobefoundontherating
plate.
Selecttheproperamperagescaleandclampthemeterprobearoundthewiretothe“C”terminalofthecompressor.
Turnontheunitandreadtherunningamperageonthemeter.Ifthecompressordoesnotstart,thereadingwillindicatethe
lockedrotoramperage(L.R.A.).
Overloads
Thecompressorisequippedwitheitheranexternalorinternaloverloadwhichsensesbothmotoramperageandwinding
temperature.Highmotortemperatureoramperageheatstheoverloadcausingittoopen,breakingthecommoncircuitwithin
thecompressor.Heatgeneratedwithinthecompressorshell,usuallyduetorecyclingofthemotor,isslowtodissipate.Itmay
takeanywherefromafewminutestoseveralhoursfortheoverloadtoreset.
Checking the Overloads
External Overloads
Withpoweroff,removetheleadsfromcompressorterminals.Ifthecompressorishot,allowtheoverloadtocoolbefore
startingcheck.Usinganohmmeter,testcontinuityacrosstheterminalsoftheexternaloverload.Ifyoudonothavecontinuity;
thisindicatesthattheoverloadisopenandmustbereplaced.
Interrnal Overloads
Somemodelcompressorsareequippedwithaninternaloverload.Theoverloadisembeddedinthemotorwindingstosense
thewindingtemperatureand/orcurrentdraw.Theoverloadisconnectedinserieswiththecommonmotorterminal.
Shouldtheinternaltemperatureand/orcurrentdrawbecomeexcessive,thecontactsintheoverloadwillopen,turningoffthe
compressor.Theoverloadwillautomaticallyreset,butmayrequireseveralhoursbeforetheheatisdissipated.
Checking the Internal Overload
1. Withnopowertounit,removetheleadsfromthecompressorterminals.
2. Usinganohmmeter,testcontinuitybetweenterminals
C-SandC-R.Ifnocontinuity,thecompressoroverloadisopenandthecompressormustbereplaced.
WARNING
ELECTRIC SHOCK HAZARD
Turn off electric power before service or
installation.
All electrical connections and wiring MUST be
the National Electrical Code and all local codes
which have jurisdiction.
Failure to do so can result in personal injury or
death.
BURN HAZARD
Proper safety procedures must be followed,
and proper protective clothing must be worn
when working with a torch.
Failure to follow these procedures could
result in moderate or serious injury.
WARNING

Friedrich Kuhl+ KEQ08A11A Specifications

General

Brand	Friedrich
Model	Kuhl+ KEQ08A11A
Category	Air Conditioner
Language	English