The abnormal indicator
light is off
1. It may be over current protection, please turn off the machine, wait for
the abnormal indicator light to turn off and then restart to restore normal.
2. It may be overheating protection, and the machine can return to
normal without waiting for 2-3 minutes.
3. The inverter circuit may be faulty, please unplug the power supply plug of
the main transformer on the inverter board and restart it:
If the abnormal indicator light is still on, shut down and unplug the power
supply plug of the high-frequency arc starting power supply (the control line
from the mid PCB to the Bottom PCB) to restart:
a. If the abnormal indicator light is still on, some IGBTs on the inverter
board are damaged. Find and replace the same type
IGBT.
b.
If the abnormal indicator is off, the high voltage package in the high-
frequency arc starting circuit on the power supply board is damaged. Replace
it.
(2) If the abnormal indicator does not light:
a. The mid-board transformer may be damaged, and the primary inductance
and Q value of the main transformer can be measured with a bridge
b. It may be that the secondary rectifier tube of the transformer breaks
down individually. Find and replace the same type of rectifier tube.
4. The feedback circuit may be broken.
The output current is unstable
or not controlled by the
potentiometer during cutting.
1. The 1K potentiometer should be replaced if it is damaged.
2. Poor contatc at various connections, especially connectors, etc., need to
be checked.
II.CUT60/80
Fault
Solution
The fan does not rotate,
the digital meter has no display,
and no welding output.
1. Confirm that the air switch is intact or closed.
2. Confirm that the power grid connected to the output cable has power.
3. The thermistor on the power board is damaged (this situation is generally
caused by the DC24V relay not closing or the poor contact of the contacts).
4. The power board (bottom board) fails, and there is no DC537V voltage
output.
5. The auxiliary power supply part of the control board is faulty.
When the fan rotates, the
abnormal indicator light is off, no
gas flows out of the torch mouth,
and there is no high-frequency
discharge sound in the machine.
1. Check all kinds of patch cords in the machine for poor contact.
2. Control circuit problems, find the cause or contact the dealer.
3. The control wire on the cutting gun is broken.
The abnormal indicator light is
off, there is gas flowing out of
the torch tip, and it cannot be cut.
1. The cable of the cutting gun is broken.
2. The ground wire is broken or not connected to the workpiece.
3. The connection between the positive output terminal or the gas and
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Italia Star Com Due S.R.L.
www.italiastar.ro
004/021.433.03.27
34