Unitor UWI 150 TP Instruction Manual

Contents

Unitor UWI 150 TP Instruction Manual Manual pdf 10 page image

Revision date 11.02.2014Page 10 of 207 TROUBLESHOOTINGSYMPTOM POSSIBLEREASONSOLUTIONNo output, no warninglight, fan not runningPrimary powerdoes not reach themachineMains fuses blownMachine is not plugged inBroken primary cableCable connection to machine is looseMachine not switched onOn/off switch damagedNo output, yellow warninglightVoltage protectionactivatedToo high input voltage, should be below285V ACThermal protectionactivatedUsed at too high duty cycle, wait untilmachine has cooled down and powerreturns.Weld with more breaks or lower currentCooling air flow is hindered, removeobstructionsHeat development in loose electrode holderor ground cable connectionsBroken fan, repair or replaceToo much dirt in power sourcecompartment, clean out.No arc, no warning light Incomplete circuit Check ground cable connections and torchconnectionUnstable arcPolarity Check that polarity set on the machinematches the wirePoor contact Check ground clamp and torch connectionsContaminated workpiece Clean