Mitsubishi Electric MELSERVO-JE MR-JE-100A, Instruction Manual

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2. INSTALLATION
2 - 5
2.5 Parts having service lives
Service lives of the following parts are listed below. However, the service life vary depending or operating
methods 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
Relay
Number of power-on and forced stop times
by EM1 (Forced stop 1): 100,000 times
Cooling fan
50,000 hours to 70,000 hours (7 years to 8
years)
(1) Smoothing capacitor
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 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 will reach the end of
their lives depending on their power supply capacity when the number of power-on times and number of
forced stop times by EM1 (Forced stop 1) are 100,000 times in total.
(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 cooling fan must be replaced in seven to eight years of continuous operation as a guideline. It must
also be changed if unusual noise or vibration is found during inspection.
The life indicates under the yearly average ambient temperature of 40
˚ C, free from corrosive gas,
flammable gas, oil mist, dust and dirt.