Kemppi master 5001 Operation Instructions Manual

Contents

8 – MASTER 5001/0541 © KEMPPI OY3. OPERATION CONTROL SWITCHES ANDPOTENTIOMETERS AND THEIR USE3.1. MAIN SWITCH I/OWhen you use the switch into I-position, pilot lamp H11 on the front wall is lighted and the machineis ready for use.Always start and switch off the machine with the main switch, never use the mains plug as aswitch.3.2. PILOT LAMPSThe pilot lamps of the machine report about the electric operation:The green pilot lamp H11 for readiness for use is always lighted, when the machineis connected to mains supply and the main switch is in I-position.Yellow pilot lamp H12 of thermal protection is lighted when thermostat has releaseddue to overheating of machine. The cooling fan is cooling down the machine and whenthe pilot lamp is switched off, the machine is again ready for welding.3.3. LOCAL OR REMOTE CONTROL OF WELDING CURRENTYou can control welding current either from local control unit R21 of the machine or from remotecontrol unit C100C which is connected to remote control connector X14. When you are using theremote control unit, the switch S21 must be in remote control position:During the control, the set value of welding current can be seen on current meter display P21and at the same time the no-load voltage of the machine can be seen on voltage display. Duringwelding the current meter P21 and the voltage meter P22 show welding current respectivelywelding voltage.Note! Voltage which can be seen during welding on display P22, is terminal voltage of machine,which is voltage between terminals X11 and X13.Accuracy of digital meter is as follows:Accuracy of current true value in respect to real value is ±2,5%, ±2A.Accuracy of voltage true value in respect to real value is ±2,5 %, ±0,2 V.Depending on welding cable length and copper cross-section, real arc voltage and meter displaymight differ many volts from each other. Error will increase when current is growing. See table inparagraph “welding and earthing cables”. In current measurement the same error won´t appear.3.4. OPERATION OF COOLING FANIn Master 5001 there are two simultaneously operating fans.– Fan is started for a moment, when main switch is placed into position I.– Fan is started after welding start after machine has been heated and runs still for 1…10 mintime after welding stop.– On no-load fan is started in intervals of ca. half an hour for a minute´s time.