Parts Having Life - Mitsubishi Electric Melservo MR-J5-G Series User Manual

5.2

Parts having life

The life of the following parts is listed below. However, the life varies depending on operating methods and environment. If any
fault is found in the parts, they must be replaced immediately regardless of their life. For parts replacement, please contact
your local sales office.
Part name
Smoothing capacitor
Relay
Cooling fan
Absolute position battery
Smoothing capacitor
The characteristic of the smoothing capacitor is deteriorated due to ripple currents, or others. 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 air-conditioned environment (ambient temperature of 40 °C or less for use at the maximum 1000 m
above sea level, 30 °C or less for over 1000 m and up to 2000 m).
Relays
Contact faults occur due to contact wear arisen from switching currents. Relays will reach the end of their lives when the total
number times of power-on, forced stop by EM1 (Forced stop 1), and a sudden stop command from the controller reaches
100,000. However, the lives of relays may depend on the power supply capacity.
Servo amplifier cooling fan
The cooling fan bearings will reach the end of their lives in 50,000 hours to 70,000 hours. Therefore, the cooling fan must be
replaced in seven to eight years for continuous operation as a guideline. If unusual noise or vibration is found during
inspection, the cooling fan must also be replaced. The life has been calculated in an environment which contains no corrosive
gas, flammable gas, oil mist, or dust. The average annual ambient temperature was 40 ˚C.
Guideline of life
10 years
Total number of times of power-on, forced stop by EM1 (Forced stop 1), and
sudden stop command from controller: 100,000
50,000 hours to 70,000 hours (7 years to 8 years)
Refer to "Absolute position detection system" in the following manual.
MR-J5 User's Manual (Hardware)
5 MAINTENANCE, INSPECTION AND PARTS REPLACEMENT
51
5.2 Parts having life
5