11-37
11-5 Periodic Maintenance
OMNUC G5-Series AC Servo Drives Users Manual (Built-in MECHATROLINK-II communications type)
11
Error and Maintenance
Servo Drive Life Expectancy
The life expectancy for units is listed below.
Aluminum electrolytic capacitors: 28,000 hours
(at an ambient drive operating temperature of 55C, constant output of rated torque, constant
output of rated rotation speed, and installation as described in this manual)
Axial-flow fan: 10,000 to 30,000 hours (The limit depends on the operating conditions.)
Inrush current prevention relay: Approx. 20,000 operations (The limit depends on the operation
conditions.)
When using the Servo Drive in continuous operation, use fans or air conditioners to maintain an
ambient temperature below 40C.
We recommend that ambient temperature and the power supply ON time be reduced as much as
possible to lengthen the service life of the drive.
The limit of aluminum electrolytic capacitors is greatly affected by the ambient operating
temperature. Generally, an increase of 10C in the operating ambient temperature will reduce
capacitor service life by 50%.
For example, when the ambient operating temperature is 25C, the life expectancy will be as
follows:
The aluminum electrolytic capacitors deteriorate even when the Servo Drive is stored with no
power supplied. If the Servo Drive is not used for a long time, we recommend a periodic inspection
and replacement schedule of 5 years.
If the Servomotor or Servo Drive is not to be used for a long time, or if they are to be used under
conditions worse than those described above, a periodic inspection schedule of 5 years is
recommended.
Upon request, OMRON will examine the Servo Drive and Servomotor and determine if a
replacement is required.
Life Expectacy (at 25
°
C) = Life Expectacy (at 55
°
C)
×
2
55 - 25
10
= 224,000 hours
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