Siemens YASKAWA 840DI Maintenance Manual page 37

A guide line of parts replacement timing
Inverter and Converter comprise a lot of parts that make possible for Inverter and Converter to
achieve full functionality only when they work correctly.
Some of them need to be replaced according to their operating status. These parts must be
checked periodically and replaced depending on their service life to use Inverter and Converter
without trouble for a long time.
Standard service life of them depends on installation environment and operating situation.
Please refer to the replacement timing of each part in Inverter and Converter described in below
table.
Table 2.6 Replacement timing of the parts in Inverter and Converter
Parts
Cooling fan
Smoothing capacitor
Circuit breaker
Relays
Fuse
Aluminum electrolytic capacitor
on print circuit board
Above table is described supposing:
• Ambient temperature : 30
• Load factor
• Availability
2.3 Check of Spindle Motor, Inverter, and Converter
Replacement timing
2 to 3 years
5 years
−
10 years
5 years
on average
°C
: 80 % or less
: 12 hours or less per day
2-9
Replacement method
Replace with new one.
Replace with new one (after a check).
Determine after a check.
Replace with new one.
Replace with new one (after a check).