Kemppi FASTMIG X 450 Service Manual page 5

READ THIS FIRST!
Fastmig X welding machine is designed for professional use.
The power source part of the machine is based on inverter technology. IGBTs are used as power switches in the inverter. Weld-
ing machines also contain all circuitry that is needed to drive wire feeder part of the machine and also easy to use intuitive user
interface. Most of the welding machine functions are controlled using a microcontroller.
Before removing any covers or commencing any testing or measurement disconnect the power source from the mains voltage.
Dangerous DC voltage may still exist after the removal of the input voltage. Machine discharges the voltage while it is turned
off, but it is always better to ensure this by measuring the voltage.
Digital multimeters may give different values depending the specifications they have. For example diode measuring values may
vary between the multimeters models. Special attention must be considered while working with the internal parts.
The device may be repaired only by a person legally authorized to perform electrical work.
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