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6. While this welding &
cutting equipment is
operated, the fault
indicator is on, and
there is no output.
7. Unstable current
output during the
welding operation and
the variable resistance
is unavailable.
8. Excessive plash
generated during
welding operation. It is
difficult to weld with
alkaline rod.
9. Insufficiency in
welding and cutting
performance and the
arc is not stable.
4. Components of HF arc starting circuit are possibly
damaged. Check and replace them if necessary.
1. It is possible of over-current protection status.
Switch off the power supply, wait till the fault
indicator is off, and restart this welding
equipment.
2. It is possible of over-heating protection status.
Wait till the fault indicator is off, and the welding
operation will be available.
3. Possible fault with Inverter circuit. Disconnect the
power supply plug (VH-0]) of transformer of top
PCB. And restart this welding equipment.
3.1 If the fault indicator is still on. Switch off the
power supply of this welding equipment.
Disconnect the power supply plug (VH-03) of
HF arc starting.
3.1.1 If the fault indicator is on, MOFESTS of top
PCB is possibly defective. Replace it, if
necessary
3.1.2 Possible damage of transformer of center
PCB. Replace it if necessary.
3.2 If the fault indicator is off.
3.2.1 Possible damage of transformer of center
PCB. Replace it if necessary. Measure the
inductance value and Q value.
L=O.9-1 .6mH Q>35. If both of the
inductance value and Q value are
comparatively low, replace them.
3.2.2 Possible damage of secondary rectifier of
transformer. Replace it if necessary.
4. Possible damage of feed back circuit. Replace it if
necessary.
1. Possible damage of I K resistance. Replace it if
necessary.
2. The connection of this welding equipment is not
available.
1. Misconnection of earth cable and welding torch
cable.
2. Reconnect them.
1. Possible insufficiency of voltage input.
2. The connection of earth cable is unavailable.
Reconnect it.
3. The gas supply system is unavailable. Examine it
and compensate it if necessary.
4. There is possible deficiency of electrode of cutting
torch. Compensate it.
5. The wave-filtering capacitor of this welding &
cutting equipment is not available. Replace it if
necessary.
6. The rod is not available, due to the fact that the
rod is been affected with damp or unqualified.
7. The current is not available to start the arc.
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