VITO PRO-POWER VII170, Instruction Manual

Page: 35 / 52

35
FREQUENTLY ASKED QUESTIONS/ TROUBLESHOOTING
Question/problem - cause
Cause
Solution
The display does not show the welding current value:
•
The power cord is unplugged;
•
The "ON/OFF” switch is set to OFF position (0);
•
Connect the power cord;
•
Set the “ON/OFF” switch to ON position (I);
The inverter is on but not supplying welding current
and the thermal protection is triggered:
•
Overloaded appliance;
•
The supply voltage is higher than the technical
data and causes the overload relay to trip;
•
The welding cables are disconnected or
incorrectly connected;
•
The ground clamp is not properly connected and
is not touching the workpiece;
•
Wait for the inverter welder to cool down and
switch it back on;
•
Adjust to the appropriate supply voltage;
•
Connect the work cables properly;
•
Attach the earth clamp correctly on the workpiece;
Poor welding performance:
•
Reverse polarity;
•
The power cord or extension cord is too long,
which causes the welding current to decrease;
•
The welding current is not adjusted to the
electrode characteristics;
•
The electrodes are damp and causes unstable arc;
•
Connect the work cables to the correct terminals;
•
Increase the cable cross-section of the extension
cord or decrease its length;
•
Adjust the welding current, on the adjustment knob,
according to the electrode used;
•
Use high-quality and dry electrodes;
Electrodes splatter excessively:
•
The welding current is very high for the electrode
diameter used;
•
Reverse polarity;
•
Adjust welding current according to the electrode
used;
•
Check that the welding cables are connected
according to the right polarity. If this is not the case,
reverse the polarity to a straight one.