Fan is working,indicator is not lit and
sound of HF arc-striking cannot be
heard, scratch start will not strike
arc.
Positive and negative electrodes of CON8 insert componentvoltage should
be about DC310V from power panel to IGBTboard .
(1) If circuit is broken and silicon bridge is poor contact.
(2) If some of six high electrolytic(about 2200UF/250V) ofpower panel
capacitor is leaking.
There is a green indicator in auxiliary power of IGBT board, if itis not on,
auxiliary power is out of work. Check fault spot andconnect with seller.
Check if connectors are poorly contacted.
Check control circuit and find out reasons or connect with seller.
Check if control cable of torch is broken.
1
2
3
4
5
3
Abnormal indicator is not on, sound
of HF arc-striking can be heard,
but
there is no welding output.
Check if torch cable is broken.
Check if grounding cable is broken or not connected to welding piece.
Check output terminals tungsten electrode to negative and work clamp to
Positive dinse on machine.
1
2
3
4
Abnormal indicator is not lit, sound of
HF arc-striking cannot be heard,
Scratch welding can strike arc.
Primary cable of arc-striking transformer is not connected to power panel
firmly, tighten it again.
Arc-striking tungsten is oxidized or too far from work, regrind or change.
Improper shielding gas can cause poor HF arc symptoms.
Switch(sticking/argon-arc welding) is damaged, replace it.
HF arc-striking circuit components is damage, contact point gap set
incorrectly, correct to approximately 25 thousandths gap.
1
2
3
4
5
Abnormal indicator is lit there is
no
welding output.
Machine may be in overheated protection, shut down machine unplug for
2-3 minutes and restart .
Maybe it is overheated protection, wait for 2-3 minutes (argon-arc welding
does not has overheated protection function.)
Inverter circuit may be in fault, disconnect the supply power plug of
main transformer which is on IGBT board then restart the machine again.
1
2
3
6
(1)
(2)
If abnormal indicator is still lit, shut down the machine and disconnect
supply
power plug of HF arc-striking power source, then restart
machine:
a.
If abnormal indicator is still lit, some of fieldistor of IGBT board is
damaged, find and replace it with same model.
b.
If abnormal indicator is not lit, rise transformer of HF arc-striking
circuit is damaged, replace it.
If abnormal indicator is not lit:
a.
Maybe transformer of middle board is damage, measure inductance
volume and Q volume of main transformer by inductance
bridge(L=0.9-1.6mH Q>35). If volume is too low, please replace it.
b. Maybe secondary rectifier tube of transformer is damaged, find out
faults and replace rectifier tube with same model.
Maybe feedback circuit is broken.
When welding aluminum,can not
break oxidized film.
Wrong amperage.
Pulse duty too low.
Twice inverter IGBT broken.
1
2
3
7
Tungsten burnt out.
Pulse duty is too high, reduce it. Set AC balance to 30.
8
4
35
Summary of Contents for TIGACDC250GD
Page 1: ...TIGACDC250GD ...
Page 2: ...1 Technical support 651 329 2686 www weldpro com Tel 651 342 1459 ...
Page 3: ...2 STOP ...
Page 6: ...Weldpro Safety 5 Weldpro Safety ...
Page 32: ...e Picture 19 31 ...
Page 37: ......
Page 38: ......