Hyundai CUT- 401, User Manual

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09
8. Troubleshooting
Common Malfunction Analysis and Solution:
Malfunctlon
Switch indicator is on, fan is not working and control knob is out of work
Switch indicator is lit and fan is working. However, once pressing control
knob of torch, there is no HF arc-striking sound and electromagnetic
valve is not working.
Cause and Solutlon
1. Over voltage protection is working.
2. Close machine and then open it again after several minutes.
1. Check if torch is open circuit.
2. Check if control knob of torch is damaged.
3. Part of assistant power of top board is damaged and there is no DC
24Voutput.
1. Check if transistor of top board is damaged (driver mould is damaged).
Switch indicator is lit and fan is working. However, once pressing control 2. Check the transformer on bottom board whose function is to increase
knob of torch, there is no HF arc-striking sound and inter red diode is lit.
the voltage.
Switch indicator is lit and fan and electromagnetic valve are working.
However, there is no sound of HF arc-striking and inter red diode is
not lit.
Arc is not starting.
HYUNDAI
3. Control mould is damaged
1. There is some trouble in part of arc-striking, such as: 1. It is too far
between discharge tips or there is adhesion in discharge tip.
2. Primary coil of arc-striking transformer is damaged or poor contact.
3. Check the high voltage diode on the bottom board
4. Check if HF electric capacity 102/10 KV is leaking
5. Check if relay is damaged.
1. Input voltage is too low.
2. Pressure of air compressor is too high or low.
CUT- 401