FAULT FINDING
0464 523 010
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© ESAB AB 2016
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A socket wrench set
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A pair of pliers
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Crosshead screwdriver (PH2 × 100, PH0 × 75)
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A slotted screwdriver
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Multimeter
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Clamp meter
Visual inspection
Before fault finding the power source, do a visual inspection. Check the power source for
exploded, burnt components or deteriorated wiring. Replace damaged part, component or
deteriorated wiring. If no visible damage is discovered go through the possible symptoms
and solutions listed in this chapter.
Not enough power
Symptom
The power source is working and the display shows the correct current value, but there is not
enough power to weld the material. Measurements with a clamp meter on the return cable
show that the power source deliver half the current value.
1. Turn off the power source and wait for five minutes.
2. Remove the cover of the power source.
3. Disconnect J1 on PCB1.
4. Turn on the power source.
5. Select "Stick mode" on the control panel. Is the voltage approximately 68 V DC on the
welding outlets?
Yes:
Replace PCB1.
No:
Go to step 6.
6. Turn off the power source and wait for five minutes.
7. Connect the flat cable connector J1 on PCB1 and disconnect the flat cable connector J1
on PCB10.
8. Turn on the power source.
9. Select "Stick mode" on the control panel. Is the voltage approximately 68 V DC on the
welding outlets?
Yes:
Replace PCB10.
No:
Fault find the power source as described in section "Fault finding without power
supply" and "Fault finding with power supply".
NOTE!
If both the boards PCB1 and PCB10 are down the error message "CC" is shown
on the display.
One of the motor fans is not working
Symptom
The power source is working but one of the motor fans is not working and the duty cycle is
shorter than normal.
