FAULT FINDING
0464 523 010
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© ESAB AB 2016
1. Check the thermal switches on PCB1, 2, 9, 10 and 11 by measuring their continuity. The
thermal switches are normally closed.
Are the thermal switches ok?
Yes:
Try to replace PCB7. If not ok, go to step 2.
No:
Replace the defective thermal switch.
2. Select "Stick mode" on the control panel and disconnect the flat cable connector J1 on
PCB1. Is the voltage approximately 68 VDC on the welding outlets?
Yes:
Replace PCB1.
No:
Go to step 3.
3. Connect the flat cable connector J1 on PCB1. Disconnect the flat cable connector J1 on
PCB10. Is the voltage appproximately 68 VDC 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".
Fault indication "CC" when torch trigger is pushed
Symptom
The power source is turned on and all the LEDs are ok. When the operator push the torch
trigger the indication for short circuit "CC" is shown on the display.
1. Turn off the power source and wait for 5 minutes. Disconnect the 2 positive and 2
negative power cables from PCB2.
CAUTION!
Note the positions of the power cables, to prevent mixing them up when
connecting them to PCB2 again.
WARNING!
Isolate the power cables to prevent short circuit between them.
2. Turn on the power source.
Select "Stick mode" on the control panel.
Is the error message "CC" still present on the display?
Yes:
Go to step 3.
No:
Replace PCB2.
NOTE!
Always replace PCB8 before you replace PCB2.
