Mitsubishi Electric MR-J4W2, Instruction Manual

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2. INSTALLATION
2 - 6
(3) Check that the connector is securely connected to the servo amplifier.
(4) Check that the wires are not coming out from the connector.
(5) Check for dust accumulation on the servo amplifier.
(6) Check for unusual noise generated from the servo amplifier.
2.6 Parts having service lives
Service lives of the following parts are listed below. However, the service lives vary depending on operating
methods and environmental conditions. If any fault is found in the parts, they must be replaced immediately
regardless of their service lives.
For parts replacement, please contact your sales representative.
Part name Life guideline
Smoothing capacitor 10 years
Relay
Number of power-on, forced stop by EM1 (Forced
stop 1), and controller forced stop times: 100,000
times
Number of on and off for STO: 1,000,000 times
Cooling fan 50,000 hours to 70,000 hours (7 to 8 years)
Absolute position battery Refer to section 12.2.
(1) Smoothing capacitor
Affected by ripple currents, etc. and deteriorates in characteristic. 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).
(2) Relays
Contact faults will occur due to contact wear arisen from switching currents. Relays reach the end of
their lives when the power has been turned on, forced stop by EM1 (Forced stop 1) has occurred, and
controller forced stop has occurred 100,000 times in total, or when the STO has been turned on and off
1,000,000 times while the servo motor is stopped under servo-off state. However, the lives of relays may
depend on the power supply capacity.
(3) Servo amplifier cooling fan
The cooling fan bearings reach the end of their life in 50,000 hours to 70,000 hours. Normally, therefore,
the fan must be changed in seven or eight years of continuous operation as a guideline.
It must also be changed if unusual noise or vibration is found during inspection.
The life is under the environment where a yearly average ambient temperature of 40
˚ C, free from
corrosive gas, flammable gas, oil mist, dust and dirt.