FAULT FINDING
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© ESAB AB 2016
4. Check the PCB1, the primary power board. Measure on:
a) Inrush current resistor, 370 ohm
b) Primary rectifier, 700 mV DC
c) Freewheel diodes (inverter), 400 mV DC
5. Check the secondary rectifier PCB9. Measure the diode, 300 mV DC.
6. Loosen and remove PCB10 and then PCB11.
7. Check PCB10 in the same way as PCB1.
8. Check PCB11 in the same way as PCB9.
9. Check the AC converter PCB2. Measure the diodes, 400 mV DC.
Fault finding with power supply
To do fault finding with power supply, follow the instructions below.
