Failure analysis and maintenance
I. CUT40
Fault records
Solution
The power indicator or
digital display is off, the fan
does not rotate, and there is
no welding output
1. The power switch is broken.
2. Check whether the power grid connected to the input cable has
power.
3. Confirm whether the input cable is broken.
The indicator light of
the power switch is on, and
the fan stops if it does not
rotate or rotates a few times.
1. 220V power is unstable (the input line is too thin) or the input line is connected to
the power grid, resulting in undervoltage protection
The circuit starts, increase the wire diameter of the grid input line or tighten the
input line node, this phenomenon is shut down 2-
The new boot can return to normal after minutes.
2. The wire between the switch and the power board is loose and tightened again.
3. The main circuit 24V relay on the power board is not attracted or damaged.
Check the 24V power supply and the relay.
Electrical damage can be replaced with other breakers of the same model.
When the fan rotates, the
abnormal indicator light
is off, there is no rustling
sound of high-frequency
discharge, and no gas flows
out of the torch nozzle.
1. The multimeter measures the positive and negative voltage of the VH-07
plug-in from the power board to the inverter board should be about DC308V.
2. Check the machine or make poor contact with various patch cords.
3. If there is a problem with the control circuit, find the reason and contact the
dealer.
4. The control wire on the cutting gun is broken.
The abnormal indicator
light is off, The there is a
rustling sound of high-
frequency discharge, 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
electricity integrated output terminal and the machine is loose.
The abnormal indicator
light is off, there is no
rustling sound of high-
frequency discharge,
and
the torch nozzle has gas
flowing out.
1. Poor contact between the primary line of the pilot arc transformer and
the power board, and re-tighten.
2. The discharge nozzle is oxidized or the distance is remote. Treat the oxide
film on the surface of the discharge nozzle or adjust the distance of the
discharge nozzle to 1mm.
3. Individual components of the high-frequency arc starting circuit are
damaged, find and replace.
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Italia Star Com Due S.R.L.
www.italiastar.ro
004/021.433.03.27
33