Raider PRO RDP-IW23 Manual Del Usuario página 14

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4.5. If the VRD equipment is installed in the machine. When the switch of back panel is put "ON"
position, the VRD indictor is lit, and when the switch is put "OFF" position, the VRD indicator is off,
then the no-load voltage is 67V.switch of VRD is put inside the machine, with the "on" condition. the
no-load voltage changes to be less than 15V, which is safe for people.
5. QUESTIONS TO BE RUN INTO DURING WELDING
Fittings, welding materials, environment factor, supply powers maybe have something to do with
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 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 been operating:
It has something with factors as following:
1. Electric wire net voltage has been changed.
2. There is harmful interference from electric wire net or other equipment
D. Too much spatter when use MMA welding,
1. Maybe current is too big and stick's diameter is too small.
2. Output terminal polarity connection is wrong, it should apply the opposite polarity at the
normal technics, which means that the stick should be connected with the negative polarity of power
source, and work piece should be connected with the positive polarity. So please change the polarity.
6. 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 need remove dust every
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.