Parts With A Service Life - Mitsubishi Electric MELSERVO-JET MR-JET-G-N1 Series User Manual

5.2

Parts with a service life

The service life of the following parts is listed below. In addition, the service life varies depending on operating methods and
environment. If any fault is found in a part, it is necessary to replace it immediately regardless of its service life. For parts
replacement, please contact your local sales office.
Part name
Smoothing capacitor
Relay
Cooling fan
Smoothing capacitor
The characteristic of the smoothing capacitor is deteriorated due to ripple currents, or others. The service life of the capacitor
greatly varies depending on the ambient temperature and operating conditions. The service life of the capacitor is 10 years
under continuous operation in air-conditioned environments (ambient temperatures of 40 °C or less at altitudes of up to 1000
m and 30 °C or less at altitudes of over 1000 m and up to 2000 m).
Relays
Contact faults occur due to contact wear arisen from switching currents. A relay will reach the end of its service life if the
following actions are performed a total of 100,000 times: powering on the servo amplifier, inputting the EM1 command (Forced
stop 1), and inputting the quick stop command from the servo controller. In addition, the service life of a relay may vary
depending on the power supply capacity.
Servo amplifier cooling fan
The cooling fan bearings will reach the end of their service life in 50,000 hours to 70,000 hours. Therefore, the cooling fan
must be replaced after seven to eight years of continuous operation as a guideline. If unusual noise or vibration is found
during inspection, the cooling fan must also be replaced. The service 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.
Recommended service 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)
5 MAINTENANCE, INSPECTION AND PARTS REPLACEMENT
5.2 Parts with a service life
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