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6. Maintenance and inspection
Input power switch must be OFF when internal and external terminal are checked. The condenser
of welder internal circuit is charged, so please wait 5 minutes after completing welding work, and
afterward open the case and check.
6 1 .
‐
Check items by time
Before
welding
1)Does the switch work well ?
2)Does the cooling fan works well according to the On and Off mode, and is the air
well ventilated to forward?
3)Is there any abnormal vibration, noise or smell?
4)Any thing wrong in weld cable and connecting area?
5)Is there any defective insulation on cable?
3 6 month
‐
1)Remove dust : Remove dusts by blowing out dry compressed air. Especially,
transformer, reactor and semiconductors shall be cleaned carefully.
2)Check of electrical contact area : Fasten bolts tightly and remove foreign material
such as rust with file or sand paper so that sufficient contact is available
between metals.
3)Check if ground is done well.
Annual
total
maintenance
1)Based on maintenance schedule, replace expendable supplies, repair case and
reinforce worn cables.
2)Insulation resistance shall be 1 mega ohm or above, or maintenance and repair are
required.
Summary of Contents for 350C
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