Mitsubishi Electronics FR-HC2 ユーザーズマニュアル

The converter 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 converter. For preventive maintenance, the parts must be replaced periodically. 

Estimated lifespan interval of the converter parts is shown in the below table. 



Estimated lifespan for when the yearly average surrounding air temperature is 40

C

(without corrosive gas, flammable gas, oil mist, dust and dirt etc.)



Input current: 80% of the converter rated current

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 are noticed during inspection, the
cooling fan must be replaced immediately.

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

Fuse inside the converter (160K or higher)

10 years

Replace (as required)

For parts replacement, contact the nearest Mitsubishi FA center.

Removal (FR-HC2-7.5K to 75K, FR-HC2-H7.5K to H110K)
1) Push the hooks from above and remove the fan cover.

2) Disconnect the fan connectors.
3) Remove the fan.

Fan cover

Fan

Fan connection 
connector

Fan

∗

Fan connection 
connector

Fan cover

∗ The number of cooling fans differs 
   according to the converter capacity.

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