Parts Having Service Life - Mitsubishi Electric MR-J4W2-0303B6 Instruction Manual

2. INSTALLATION
(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.
(7) 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.

2.6 Parts having service life

Service life of the following parts is listed below. However, the service life varies 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 life.
For parts replacement, please contact your sales representative.
(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 air-conditioned environment (ambient temperature of 40 °C or less).
(2) Relays
Contact faults will occur due to contact wear arisen from switching currents. Relays reach the end of
their life 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 life 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.
If unusual noise or vibration is found during inspection, the cooling fan must also be replaced.
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.
Part name
Smoothing capacitor
Number of power-on, forced stop by EM1 (Forced
stop 1), and controller forced stop times: 100,000
Relay
Cooling fan
Absolute position battery
2 - 6
Life guideline
10 years
times
Number of on and off for STO: 1,000,000 times
50,000 hours to 70,000 hours (7 to 8 years)
Refer to section 12.2.