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APPENDIX
App. - 12
App. 4.5 Maintenance and service
WARNING
To avoid an electric shock, only qualified personnel should attempt inspections.
For repair and parts replacement, contact your local sales office.
App. 4.5.1 Inspection items
It is recommended that the following points periodically be checked.
(1) Check for loose screws on the protective earth (PE) terminal. Retighten any loose screws. (tightening
torque: 1.2 N•m)
(2) Servo motor bearings, brake section, etc. for unusual noise.
(3) Check the cables and the like for scratches or cracks. Perform periodic inspection according to
operating conditions.
(4) Check that the connectors are securely connected to the servo motor.
(5) Check that the wires are not coming out from the connector.
(6) Check for dust accumulation on the servo amplifier.
(7) Check for unusual noise generated from the servo amplifier.
(8) Check the servo motor shaft and coupling for connection.
App. 4.5.2 Parts having service lives
Service lives of the following parts are listed below. However, the service lives vary depending on operation
and environment. If any fault is found in the parts, they must be replaced immediately regardless of their
service lives. For parts replacement, please contact your local sales office.
Part name Life guideline
Smoothing capacitor (Note 3) 10 years
Relay
Number of power-on, forced stop, and controller forced stop times:
100 000 times
Cooling fan 50,000 hours to 70,000 hours (7 years to 8 years)
(Note 1) Battery backup time
Approximately 20,000 hours
(equipment power supply: off, ambient temperature: 20 °C)
(Note 2) Battery life 5 years from date of manufacture
Note 1. The time is for using MR-BAT6V1SET-A. For details and other battery backup time, refer to chapter 12.
2. Quality of the batteries degrades by the storage condition. The battery life is 5 years from the production date regardless of the
connection status.
3. The characteristic of smoothing capacitor is deteriorated due to ripple currents, etc. The life of the capacitor greatly depends
on ambient temperature and operating conditions. The capacitor will reach the end of its life in 10 years of continuous
operation in normal air-conditioned environment (40 °C surrounding air temperature or less).