ANDELI MCT Series Owner's Manual page 16

Fault symptom
The power indicator does not
light, the fan does not turn, no
welding output
The power switch indicator is on,
the fan does not turn or rotates
for a few times to stop, no
welding output
The fan turns, the abnormal
indicator light is not bright, there
is no high-frequency discharge
"sa sa sa" sound, and the "arc
welding" can not start the arc.
The abnormal indicator light is not
lit, there is a high-frequency
discharge "sa sa sa" sound, no
welding output.
Abnormal indicator light does not
light, no high frequency discharge
"sa sa sa" sound, "LIFT TIG
welding" can start arc.
1. The power switch is broken.
2. Confirm that the power grid connected to the input cable has power.
3. Check if the input cable has a break.
1. It is possible to input the wrong connection on the 380V power
supply, causing the overvoltage protection circuit to start, and then
reconnect it to the AC110V\220V power supply and restart it.
2.AC110V\ 220V power is unstable (the input line is too long) or the
input line is connected to the power grid, causing the overvoltage
protection circuit to start, increasing the wire diameter of the grid
input line or fastening the input line node. This phenomenon is in
shutdown 2 - After 3 minutes, the new boot will return to normal.
3. Continuously open and close the power switch in a short time,
causing the overvoltage protection circuit to start. Wait for 2-3
minutes and then restart it.
4. The wires between the switch and the power board are loose and
retightened.
5. The main circuit 24V relay on the power supply board is not
connected or damaged, check the 24V power supply and relay.
1. The voltage of the positive and negative poles of the VH-07 plug-in
of the multimeter to the MOS board should be about DC308V.
2. The auxiliary power supply on the MOS board has a green indicator
light. If the light is not on, the auxiliary power supply is not working.
Look for the fault point or contact the dealer.
3. Check the poor connection of various patch cords in the machine.
4. Control circuit problems, find the cause or contact the dealer.
5. The control line on the welding torch is broken.
1. The welding gun cable is broken.
2. The ground wire is broken or not connected to the welded
workpiece.
3. The positive output terminal or the welding torch gas output terminal
is loose from the connection inside the machine.
1. The primary line of the arcing transformer has poor contact with the
power board and is retightened.
2. The discharge nozzle is oxidized or the distance is remote. The
surface oxide film of the discharge nozzle is treated or the distance of
the discharge nozzle is adjusted to 1 mm.
3. The individual components of the high-frequency arc-ignition circuit
are damaged, and the replacement is found.
15
Remedy