ANDELI MCT-520DPL Manual del usuario - Página 16

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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.

Remedy