6. Maintenance and inspection
6. Maintenance and inspection
6. Maintenance and inspection
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
6- 1. Check items by time
6- 1. Check items by time
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 DRAGON-350A
Page 21: ...10 Diagrams 10 Diagrams 10 Diagrams 10 Diagrams 1 Diagram...
Page 22: ...2 Development Figure...
Page 23: ...3 Outline Dimensions...
