Filter
Top Products
215
Inspection items
7
PRECAUTIONS FOR MAINTENANCE AND INSPECTION
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.
∗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
(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.
Part Name Estimated lifespan ∗1 Description
Cooling fan 10 years Replace (as required)
Main circuit smoothing
capacitor
10 years ∗2 Replace (as required)
On-board smoothing
capacitor
10 years ∗2 Replace the board (as required)
Relays — as required
NOTE
For parts replacement, contact the nearest Mitsubishi FA Center.
zRemoval
1) Push the hooks from above and remove the fan
cover.
3.7K or lower 5.5K or higher
2) Disconnect the fan connectors.
3) Remove the fan.
3.7K or lower
Example for FR-E740-3.7KNF
5.5K or higher
Example for FR-E740-5.5KNF
Fan connection
connector
Fan
Fan cover
Fan connection
connector
Fan
Fan cover