Mitsubishi Electric MR-JE-_A, Instruction Manual

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APPENDIX
App. - 9
App. 2.5 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. 2.5.1 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.
(9) Make sure that the emergency stop circuit operates properly such that an operation can be stopped
immediately and a power is shut off by the emergency stop switch.
App. 2.5.2 Parts having service life
Service life of the following parts is listed below. However, the service life varies 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 10 years (Note 3)
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)
Battery backup time (Note 1)
Approximately 20,000 hours (equipment power supply: off, ambient
temperature: 20 °C)
Battery life (Note 2) 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 each servo amplifier instruction
manual.
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 be the end of its life in 10 years of continuous operation in
air-conditioned environment (surrounding air temperature of 40 °C or less for use at the maximum 1000 m above sea level,
30 °C or less for over 1000 m to 2000 m).