Mitsubishi FR-A800

Inspection item
678
PRECAUTIONS FOR MAINTENANCE AND INSPECTION
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.
 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 inverter rating
NOTE
• For parts replacement, contact the nearest Mitsubishi 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.
 Initial values differ according to the inverter capacity (Refer to page 281 for details.)
NOTE
• Refer to page 278 to perform the life check of the inverter parts.
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
Main circuit fuse (FR-A840-04320(160K) 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 50% of the specified speed.
