Filter
Top Products
292
Inspection items
6.1.7 Replacement of parts
The drive unit 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 drive unit. For preventive maintenance, the parts must be replaced periodically.
Use the life check function as a guidance of parts replacement.
Estimated lifespan for when the yearly average surrounding air temperature is 40°C (without corrosive gas, flammable gas, oil mist, dust and dirt etc.)
Output current: 80% of the drive unit 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 Description
Cooling fan
10 years Replace (as required)
Main circuit smoothing capacitor 10 years
Replace (as required)
On-board smoothing capacitor 10 years
Replace the board (as required)
Relays — as required
NOTE
For parts replacement, consult the nearest Mitsubishi FA Center.
Removal
1) Push the hooks from above and remove the fan
cover.
2) Disconnect the fan connectors.
3) Remove the fan.
Fan connecto
r
Fan
Fan cover