Overheat Protection - Kemppi Minarc Evo 150 Service Manual

Service manual Minarc Evo 150 and 180

4.3.1.5. Overheat protection

Main transformer PTC is soldered to the Z001 main circuit card:

Measure the resistance: It should be less than 100Ω

In over temperature situation PTC goes to high-resistance mode (>10kΩ)

Machine gives temperature alarm at 1,5kΩ

A broken PTC has usually hundreds of kilo ohms resistance or no value at all.
23
Kemppi Oy
Version 1.3
+12VDC,
Test point on the right
side of R22
Reference ground, N3
right side, third leg
from top
Primary GND,
TP5
+390VDC,
DC-link,
TP4
30.9.2015