Samlexpower SEC-1250UL Owner's Manual - Section 9 |
26 | SAMLEX AMERICA INC.
SAMLEX AMERICA INC. | 27
seCtIOn 9 |
troubleshooting
Someloadslikemotors,compressors,incandescentlamps,halogenlamps,heatingelements,relays,
coils,capacitorsetc.drawverylargeinrush/startingcurrentswhichmayreachupto10timestheir
normaloperatingcurrents.Ensurethatthestarting/inrushcurrentorthemaximumoperatingcur-
rentoftheloadislowerthanthecurrentlimitvalueofthecharger.Donotusealoadthatdraws
morethan50A(25A+/-1Afor“HalfPowerMode”)forSEC-1250ULormorethan25A(12.5A+/-1A
for“HalfPowerMode”)forSEC-2425UL.Oncetheloadcurrentisreducedbelowtheabovelimiting
values,thechargerwillrecoverautomatically.
tHe BAtteRy iS GettinG oVeR cHARGed / oVeRHeAted / loSeS WAteR oR BoilS.
•There is an external load connected to the battery when it is being charged: 3-stage charging is
recommendedforchargingstand-aloneorunloadedbatteries(thereisnoloadconnectedtothe
batterywhenitisbeingcharged).Ifaloadisalsoconnectedsimultaneously,apartofthecharger’s
outputcurrentwillbedivertedtothisload.Thus,thechargermayremainlockedinStage2ifthe
currentdrawnbytheloadismorethanthepresetvalueofthresholdcurrentdeterminingtransition
fromStage2toStage3.Thiswillleadtoovercharging,overheatingandlossofelectrolyte.
Forchargingabatterywhenaloadisalsoconnectedsimultaneously,Stage2voltageshouldbe
thesameasStage3voltage(Stage2isdisabled).Select“LoadedBattery”withthehelpofDIP
SwitchesS1andS2ofthesetof4DIPSwitches-Seeunder“DIPSwitchSetting”onpage21.
•Two banks of batteries are being charged and the batteries in the two banks are in dissimilar
state of discharge:Whenchargingmorethanonebankofbatteriesatthesametimeusing3
StageCharging,ensurethatthebatteriesinthebanksareinasimilardischargedcondition.Ifone
bankiscompletelydischargedandanotherisalmostfullycharged,thebankthatisfullycharged
willbesubjectedtooverchargeconditionduringthetimewhenthechargerremainsinStage2
forchargingthecompletelydischargedbank.
If2banksofbatteriesarerequiredtobechargedandtheyareatdifferentdischargedconditions,
select“2StageCharging”withthehelpofswitchesS1andS2ofthesetof4DipSwitches(bothS1
&S2inoffcondition)-Seeunder“DIPSwitchSetting”onpage21.
• Very high charging current for low Ah capacity battery: Charging rate should normally be limited
toC/10unlessspecifiedotherwisebythebatterymanufacturer.Veryhighchargingratemaylead
toreductioninthecellvoltagewhengassingstartsandcanresultinhighertemperatures,lossof
water and boiling of the battery.
tHe BAtteRy iS tAKinG exceSSiVely lonG tiMe to FUlly RecHARGe oR WHen tHe
cHARGeR iS PoWeRed And iS BeinG USed AS A dc PoWeR SUPPly / UPS, tHe oUt-
PUt VoltAGe dRoPS At loWeR dc loAd cURRentS.
• The unit is in “Half Power Mode”:(GreenLED(8)locatedonthebottomleftcornerofthefront
paneloftheunitislighted).Whenthismodeisselected,themaximumchargingcurrentwillbe
automaticallyreducedto25A+/-1AforSEC-1250ULand12.5A+/-1AforSEC-2425UL.Hence,the
chargingtimewillincrease.Switchoffthe“HalfPowerMode”ifthefullratedcharging
capacity is
required.