Free tool · Mitsubishi · Yaskawa · Updated November 2026
Servo maintenance planner: when to replace the fan, battery and capacitor
Enter the amplifier series and the date it was commissioned. The planner lists when the cooling fan, absolute encoder battery, capacitor and relays reach the replacement period given in the Mitsubishi and Yaskawa manuals. The dates are guidelines, not guarantees. Star Automations is an independent repairer, not an authorised service provider of Mitsubishi Electric or Yaskawa.
Your maintenance plan
The calculation runs in your browser. Nothing is stored or sent unless you press the WhatsApp button.
Where the periods come from
- Mitsubishi MR-J3-A and MR-J2S-A instruction manuals: cooling fan, relays, smoothing capacitor and the MR-J3 battery. See Mitsubishi servo scheduled maintenance.
- Yaskawa Sigma-7 SGD7S product manual and Sigma-V SGDV user manual. See Yaskawa servo scheduled maintenance.
- Alarms that point to a worn part are listed in the MR-J2S and MR-J3 alarm list.
Questions
Are these dates exact?
No. They are guideline windows from the OEM manuals, which assume stated operating conditions such as an ambient of 30°C or 40°C. Hot, dusty or heavily loaded machines wear parts sooner. Use the planner to schedule inspections, and check the manual for your exact model.
Which amplifiers does the planner cover?
Mitsubishi MELSERVO-J3 and MELSERVO-J2S, and Yaskawa Sigma-7 and Sigma-V. For parts where we could not verify a period in the manual, the planner says so instead of guessing.
Does the planner store my dates?
No. The calculation runs in your browser. Nothing you enter is sent to us unless you choose to send the list on WhatsApp.
What about servo motor bearings?
We could not verify a fixed hour figure for motor bearings in the amplifier manuals, so they are not given a date. Replace bearings on condition: noise, vibration or heat, or during motor repair.
Can Star Automations replace these parts?
Yes, as part of our repair service. We are an independent repairer and not an authorised service provider of Mitsubishi Electric or Yaskawa.
About the author
S. Suresh, Founder and CEO of Star Automations. More than 25 years in industrial electronics repair, with servo motor and drive repair as the main focus since 1998. Last updated: .
Send the plan to Star Automations.
Press the WhatsApp button in the planner, or WhatsApp the amplifier label to +91 97866 22233, or email info@starautomations.com.