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Sigma II User's Manual
9.1.2
Servo Amplifier Inspection
For inspection and maintenance of the servo amplifier, follow the inspection proce-
dures in the following table. Perform inspection and maintenance at least once every
year. Other routine inspections are not required.
Action or
Problem
Clean interior and
circuit boards
Loose screws
Defective parts in
unit or on circuit
boards
n
Part Replacement Schedule
The following parts are subject to mechanical wear or deterioration over time. To
avoid failure, replace these parts at the frequency indicated.
The parameters of any servo amplifiers overhauled by Yaskawa are reset to the
default (standard factory) settings before shipping. Be sure to confirm that the
parameters are set to the application's requirements before starting operation.
Part
Cooling fan
Smoothing capacitor
Relays
Fuse
Aluminum electrolytic
capacitor on circuit
board
Operating Conditions:
Ambient Temperature: Annual average of 30°C
Load Factor:
Operation Rate:
Servo Amplifier Inspections
Frequency
Check for dust, dirt, and oil
At least every year
on the surfaces.
Check for loose terminal
At least every year
block and connector
screws.
Check for discoloration,
At least every year
damage or discontinuities
due to heating.
Periodical Part Replacement
Standard
Replacement Period
4 to 5 years
7 to 8 years
—
10 years
5 years
80%, maximum.
20 hours/day, maximum.
Chapter 9: Inspection, Maintenance, and Troubleshooting
Procedure
Replacement Method
Replace with new part.
Test. Replace with a new part, if necessary.
Test. Replace if necessary.
Replace with new part.
Test. Replace with new circuit board, if nec-
essary.
9-3
Comments
Clean with com-
pressed air.
Tighten any loose
screws.
Contact Yaskawa.
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