Jasic MIG 350P, Operator'S Manual

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OPERATOR’S MANUAL · MIG/MAG PULSE SERIES
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7.2 Maintenance
1) Clean the dust inside the power supply periodically: Too much dust inside the power supply would
reduce the insulation performance of the welding machine, which brings direct threat against machine
security and personal safety. Therefore, it should be cleaned at least twice a year. If welding
environment with heavy smoke and pollution, the machine should be cleaned daily. Before cleaning,
turn off the power switch, remove the side plate and top cover, and blow the dust with dry compressed
air from top to bottom. The pressure of compressed air should be at a proper level in order to
avoid the small parts inside the machine being damaged. If any grease, wipe with a cloth.
2) Check periodically whether inner circuit connection is in good condition (esp. plugs). Tighten
the loose connection. If there is oxidization, remove it with sandpaper and then reconnect.
3) Check periodically whether the insulation covers of all cables is in good condition. If there is
any dilapidation, rewrap it or replace it.
4) Check the insulation resistance of the welding machine periodically: Mainly check the insulation
resistance between the welding machine power input and output and insulation resistance between
the power input and the enclosure, and make sure such insulation resistance should be greater than
10 ohms.
5) Put the machine into the original packing in dry location if it is not used for a long time.
Ask professionals for help if any difficulty.

If any difficulty in installation or operation of the machine, please refer to the relevant
contents in this manual.

If you can not fully understand after reading, or can not solve the problem according to the
instructions in this manual, please contact your supplier or our company for help.
Component explosion may cause injury.

When the inverter welder is powered on, invalid components may explode or lead to explosion
of other components.

Wear face guard and long-sleeved clothing when maintaining the inverter welder.
Static causes damage to PCB.

Wear a grounded antistatic wristband when carrying PCBs and components.

Store, carry and transport PCBs with appropriate antistatic bags or boxes.
Electric shock may occur when testing.

Cut off the power supply of the welder before lead testing.

Test with an instrument with auto-fixing clamp on one of its leads.

Read the instruction of the testing equipment carefully.
The machine may be damaged during welding. Timely maintenance should be carried out after the
confirmation of damage. Only qualified individuals can uncover or repair the machine. Otherwise,
further machine fault and further damage to valuable parts may occur.