4. Prevent the machine from water entering or being affected with damp,
otherwise dry it by blowing and examine the insulation condition with a
megohmmeter (both between the connected nodes and the between the
connection points and the casing). Welding cannot be continued unless no
abnormal circumstance is found.
5. If the welding machine will be disused for a long time, it should be put into
the original packaging and stored in a dry environment.
6. Troubleshooting
Note: The following operation requires that the operator have enough
professional knowledge on electricity and overall elementary knowledge of
safety. The operation should have the qualification certificate that can
prove his ability and knowledge.
Troubleshooting for LGK-40:
Faults Correction
actions
The power LED shines
The fan does not rotate and the
control button is out of control.
Overvoltage protection. Turn off the machine and wait for a
moment. Then restart the machine.
The power LED shines.
The fan rotates. If the control
button of the cutting torch is
pressed, the electromagnetic
valve acts without the sound of
high frequency arc striking
discharging, and the red LED
inside the machine shines.
1. The MOS field effect tube K1170 of the upper board is
damaged (the driving module is damaged).
2. The step up electric transducer is damaged.
3. The control module is damaged.
The power LED shines.
The fan rotates. If the control
button of the cutting torch is
pressed, the electromagnetically
operated valve acts without the
sound of high frequency arc
striking discharging, and the red
LED inside the machine does not
shine.
There is something wrong with the arc striking part:
1. The distance of the discharging nozzle may be too long or
there may be edge adherence phenomenon.
2. There may be the phenomenon of open circuit or loose
contact in the primary coil of the arc striking transformer.
3. The quadruple voltage rectifier diode may be sparked
over.
4. The high frequency capacitor 102/10KV may leak
electricity.
5. The relay may be damaged.
Arc cannot be stricken during
welding, and the else is normal.
1. The input voltage is too low.
2. The pressure of the air compressor is too high or too low.
Summary of Contents for LGK-40
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