YASKAWA SIEMENS CNC Series, Maintenance Manual, Serviceman Handbook

Page: 332 / 373

16.1 Checking Servo motor and SERVOPACK
16-3
16.1.2 Checking SERVOPACK
The following table summarizes how to check the SERVOPACK. You need not conduct a daily
check; however, conduct a check once a year at least.
„ A guide line of parts replacement timing
The following parts become worn or degraded over years. Conduct a periodical check.
As to the SERVOPACKs that we made an overall repair, we are returning them to users with
resetting their user-defined constants to standard values. Be sure to check user-defined con-
stants before starting operation.
Operating conditions
• Ambient temperature: 30
℃
on average
• Load factor: 80% or less
• Availability: 20 hours or less per day
Table 16.2 SERVOPACK check
Check item Check timing Check method Corrective action
Cleaning of main
unit and board Once per year at
least Shall be free from adherents
such as dirt, dust, and oil. Clean with a cloth or air.
Loose screw Once per year at
least Fixing screws shall not be
loose on terminal blocks and
connectors etc. Retighten the screws.
Failed parts on
main unit or
boards Once per year at
least Shall be free from discolora-
tion, breakage, wire-break
resulting from heat genera-
tion. Contact us.
Table 16.3 Periodical parts check
Part name Standard
replacement
timing
Replacement method etc.
Cooling fan 4-5 years Replace with new one
Smoothing capacitor 7-8 years Replace with new one (after a check.)
Relays
- Determine after a check.
Fuse 10 years Replace with new one
Aluminum electrolytic
capacitor on printed
board 5 years Replace entire board with new one (after
a check.)