Parts With A Service Life - Mitsubishi Electric -MR-CV User Manual

2.4

Parts with a service life

The service life of the following parts is listed below. In addition, the service life varies depending on the 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
Cooling fan
Smoothing capacitor
The service life of the capacitor is 10 years (with a three-phase power supply input) 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). Ripple currents or other factors will deteriorate the characteristic of the smoothing capacitor.
The service life of the capacitor greatly varies depending on ambient temperature and operating conditions.
Converter unit cooling fan
The cooling fan bearings will reach the end of their service life in 10000 hours to 30000 hours. Therefore, the cooling fan must
be replaced after two to three 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.
2 INSTALLATION
14
2.4 Parts with a service life
Recommended service life
10 years
10000 hours to 30000 hours (2 to 3 years)