Kemppi MinarcTig Evo 200 Service Manual page 23

Service manual MinarcTig Evo 200
IGBT module NTC is integrated inside the module:

Measure the resistance, it should be between 14-2,8kΩ in a cool machine (in environ-
ment temperature 0-40°C)

While temperature rises, resistance lowers and at 500Ω point the inverter stops and gives
overheat alert.

A broken NTC has usually hundreds of kilo ohms resistance, no value at all or short cir-
cuit.

21
Kemppi Oy
Version 1.1.5.
GND
IGBT module NTC resistor
29.9.2015