FAULT FINDING
0464 523 010
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© ESAB AB 2016
3. Remove the cover of the power source.
4. Disconnect the flat cable connector J1 on PCB1.Turn on the power source.
5. Turon on the power source and select "Stick mode" on the control panel. Is the voltage
approximately 68 V DC on the welding outlets and is it possible to adjust the current with
the encoder knob.
Yes:
Replace PCB1.
No:
Go to step 3.
6. Turn off the power source and wait for five minutes.
7. Connect the flat cable connector J1 to PCB1 and disconnect the flat cable connector J1
on PCB10.
8. Turn on the power source and select "Stick mode" on the control panel. Is the voltage
approximately 68 V DC on the welding outlets and is it possible to adjust the current with
the encoder knob?
Yes:
Replace PCB10.
No:
Fault find the power source as described in section "Fault finding without power
supply" and "Fault finding with power supply".
Power source in TIG mode does not strike
Symptom
The power source is turned on and all the LEDs are ok. The power source does not strike in
TIG mode.
1. Check PCB5. Is there a spark in the gap when the torch trigger is pushed?
Yes:
Go to step 2.
No:
Got to step 3.
2. Measure the continuity in the torch cable? Is the cable defective?
Yes:
Replace the cable.
No:
Go to step 3.
3. Check that the voltages are present on the auxiliary transformer (T AUX 1), they should
be 0-24 VAC, 0-9 VAC and 0-18 VAC. Are they present?
Yes:
Go to step 4.
No:
Go to step 5.
4. Check the input voltage on pin 1 and 2 at PCB5. Is 24 VAC present?
Yes:
Replace PCB5.
No:
Go to step 5.
5. Check the wiring and connectors between T AUX1 and PCB5. Are they damaged or
defective?
Yes:
Replace damaged and defective wiring and connectors.
No:
Go to step 6.
6. Is there correct mains power supply on the auxiliary transformer (T AUX 1)?
Yes:
Change the auxiliary transformer (T AUX 1).
No:
Go to step 7.
7. Is the fuse F1 at the rear of the power source damaged or blown?
Yes:
Replace the fuse F1. Value = 100 mA T.
No:
Replace PCB7.
