Inspection item
92
PRECAUTIONS FOR MAINTENANCE AND INSPECTION
5.1.6
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 ambient temperature is 35°C.
(without corrosive gas, flammable gas, oil mist, dust and dirt etc.)
Output current: 80% of the inverter rating
The estimated lifespan is only a guide. To maintain the waterproof and dustproof performances of the inverter, daily and periodic inspections are
recommended.
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, internal 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.
NOTE
• Refer to the FR-F800 Instruction Manual (Detailed) to perform the life check of the inverter parts.
Part name
Estimated lifespan
Description
Cooling fan, internal 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
Gasket
2 years
Replace (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, internal air circulation fan
Less than 70% of the specified speed.
ABC relay contact
Estimated remaining life 10%
