Kemppi Minarc Evo 150 Service Manual

Also see for Minarc Evo 150: Operating manual

Kemppi Minarc Evo 150 Service Manual Manual pdf 28 page image

Service manual Minarc Evo 150 and 180 Version 1.3 30.9.201526Kemppi Oy4.3.3. Cooling fanCooling fan gets the power from the +24VDC line. Voltage can be measured in the X7 connector (X7-1+24VDC and X7-2 GND). Note that the cooling fan has delayed starting.The cooling fan is installed so that the air flows from the left side plate to Z001 card. Air comes outthrough the front and the back plate grills.4.3.4. Low voltage testsLow voltage test cannot be done to Minarc Evo 150 machine.4.3.5. Safety testsSafety tests are made normally, but PE conductivity test cannot be tested, because there are no outerparts connected to PE. Do not use PE continuity test equipment with high testing current.PE wire conductivity should be measured only by DMM with resistance function to continuity. Measurethe resistance between the main supply cable terminal and Z001 X3.4.4. Semiconductor installationIt is a must be to use torque screwdriver while tightening any power components onto the heatsink. See following sections for tightening torques.4.4.1. Rectifier/PFC module and IGBTMinarcEvo 150/180 has soldered input rectifier/PFC and IGBT modules and it is not possible to changethem separately. Only reliable way to replace the module(s) is to change the whole Z001 main circuitcard.The heat sink paste should be spread on to the modules in an even layer by using fingers. Then the cardshould be immediately mounted onto the heat sink, this minimizes the possibility of any contamination(dirt etc.) getting between the components.The hexagonal fixing screws for the IGBT module are tightened (stage 1) to 1 Nm. And after few minutesthe module screws can be finally tightened (stage 2) to a torque of 2,0 Nm.Once all four hexagonal screws are tightened to right torque, the module support cap screws can befastened. The idea is to support the module to the PCB with the plastic caps, instead of the componentsoldered legs. The torx screws for caps can be tightened only up to 0,5 Nm, or otherwise PCB may bend.Hexagonal screw Support cap Support cap screw

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