8.4 Guideline for Service Lifetime and Replacement of Components Used
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8.4
Guideline for Service Lifetime and Replacement of
Components Used
The welding source is composed of many components. Unless all these components operate
normally, the welding source cannot utilize its essential functions. Therefore, it is absolutely
necessary to find any sign leading to a failure of a component or device as early as possible
according to the periodical inspection and take proper corrective action.
These components cannot be used continuously for ever. Even under normal operation
status, they are apt to have variation of the characteristics or malfunction after the life elapses.
Therefore, it is recommended that the components be replaced periodically so that the welder
can operate at optimum performance.
Normally, refer to the following guideline of the component replacement when the welding
source is used in the rated specifications (8 hours a day, 250 days a year).
• Electrolytic capacitor: Approx. 5 years
• Cooling fan: Approx. 5 years
• Breakers, relays: Depends on how often they are used. It is recommended that they be
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