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7. PRECAUTIONS FOR MAINTENANCE AND INSPECTION
7.1 Inspection item
7.1.5 Cleaning
Always run the inverter in a clean status.
When cleaning the inverter, gently wipe dirty areas with a soft cloth immersed in neutral detergent or ethanol.
• Do not use solvent, such as acetone, benzene, toluene and alcohol, as these will cause the inverter surface paint to peel
off.
• The display, etc. of the operation panel (FR-LU08) and the parameter unit (FR-PU07) are vulnerable to detergent and
alcohol. Therefore, avoid using them for cleaning.
7.1.6 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 rating
• For parts replacement, contact the nearest Mitsubishi Electric FA center.
Displaying the life of the inverter parts
The inverter diagnoses the main circuit capacitor, control circuit capacitor, cooling fan, and inrush current limit circuit by itself
and estimates their lives.
The self-diagnostic warning is output when the life span of each part is near its end. It gives an indication of replacement time.
The life warning output can be used as a guideline for life judgment.
• Refer to page 182 to perform the life check of the inverter parts.
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
Main circuit fuse (FR-F860-02890 or higher) 10 years Replace the fuse (as required)
Parts Judgment level
Main circuit capacitor 85% of the initial capacity
Control circuit capacitor Estimated remaining life 10%
Inrush current limit circuit Estimated remaining life 10% (Power ON: 100,000 times left)
Cooling fan Less than the specified speed.
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