Replacement Of Parts - Mitsubishi Electric 700 Series Instruction Manual

7.1.7

Replacement of parts

The inverter consists of many electronic parts such as semiconductor devices.
The following parts may deteriorate with age because of their structures or physical characteristics, leading to reduced
performance or fault of the inverter. For preventive maintenance, the parts must be replaced periodically.
Use the life check function as a guidance of parts replacement.
Part Name
Cooling fan
Main circuit smoothing
capacitor
On-board smoothing
capacitor
Relays
∗1
Estimated lifespan for when the yearly average surrounding air temperature is 40°C
(without corrosive gas, flammable gas, oil mist, dust and dirt etc.)
∗2
Output current: 80% of the inverter rated current
NOTE
For parts replacement, contact the nearest Mitsubishi FA Center.
(1) Cooling fan
The replacement interval of the cooling fan used for cooling the parts generating heat such as the main circuit semiconductor
is greatly affected by the surrounding air temperature. When unusual noise and/or vibration is noticed during inspection, the
cooling fan must be replaced immediately.
Removal
1) Push the hooks from above and remove the fan
cover.
3.7K or lower
2) Disconnect the fan connectors.
3) Remove the fan.
3.7K or lower
Example for FR-E740-3.7KNF
Estimated lifespan ∗1
10 years
10 years ∗2
10 years ∗2
—
Fan cover
Fan connection
connector
Fan
Description
Replace (as required)
Replace (as required)
Replace the board (as required)
as required
5.5K or higher
5.5K or higher
Example for FR-E740-5.5KNF
Inspection items
Fan cover
Fan
Fan connection
connector
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