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Inspection items
5
MAINTENANCE AND INSPECTION
5.1.6 Replacement of parts
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 40C
(without corrosive gas, flammable gas, oil mist, dust and dirt etc.)
Input current: 80% of the converter 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 are 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
Fuse inside the converter (160K or higher) 10 years Replace (as required)
REMARKS
For parts replacement, contact the nearest Mitsubishi FA center.
NOTE
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.
FR-HC2-7.5K, 15K
FR-HC2-H7.5K, H15K
(Example for FR-HC2-7.5K)
FR-HC2-7.5K, 15K
FR-HC2-H7.5K, H15K
FR-HC2-30K or higher
FR-HC2-H30K to H110K
Fan cover
Fan
Fan connection
connector
Fan∗
Fan connection
connector
Fan cover
∗ The number of cooling fans differs
according to the converter capacity.
FR-HC2-30K or higher
FR-HC2-H30K to H110K
(Example for FR-HC2-55K)
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