WNER’S MANUAL
- 11 - YF-12O A/0
QUESTIONS TO BE RUN INTO DURING WELDING
Fittings, welding materials, environment factor, supply powers maybe have some impact in welding. User must try to
improve welding environment.
A. Arc-striking is difficult and easy to pause:
1. Make sure quality of tungsten electrode is high.
2. If the electrode is not dried, it will cause unstable arc, welding defect increases and the quality is down.
3. If use extra-long cable, the output voltage will decrease, so please shorten the cable.
B. Output current is not to rated value:
When power voltage departs from the rated value, it will make the output current not matched with rated value; when
voltage is lower than rated value, the max output may lower than rated value.
C. Current is not stabilizing when machine is being operated:
This may be caused by the following factors:
1. Electric wire net voltage has been changed.
2. There is harmful interference from electric wire net or other equipment.
D. Too much spatter during MMA welding:
1. Maybe current is too heavy while welding rod diameter is too small:
2. Output terminal polarity connection is wrong. The positive connection should be applied at the normal techniques,
that is to say, welding rod connects with the negative polarity while the work piece with the positive polarity. So
please change the polarity.
MAINTENANCE
1. Remove dust by dry and clean compressed air regularly, if welding machine is operating in environment where is
polluted with smokes and pollution air, the machine needs to be cleaned once a month.
2. Pressure of compressed air must be within the reasonable range in order to prevent damaging to small components
of inner-machine.
3. Check internal circuit of welding machine regularly and make sure the circuit connections are connected correctly
and tightly (especially plug-in connector and components). If scale and rust are found, please clean it, and connect
again tightly.
4. Prevent water and steam from entering into the machine. If that happens, please blow it dry and check insulation of
machine.
5. If welding machine will not be used for long time, it must be put into the packing box and stored in dry and clean
environment.
Summary of Contents for I-DC 400
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