Replacement Of Parts - Mitsubishi Electric FR-A820-00046 Instruction Manual

Inspection item
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.
Part name
Cooling fan
Main circuit smoothing capacitor
On-board smoothing capacitor
Relays
Main circuit fuse
(FR-A840-04320(160K) or higher)
Tab. 7-3:
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
NOTES 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 indi-
cation of replacement time.
The life warning output can be used as a guideline for life judgment.
Parts
Main circuit capacitor
Control circuit capacitor
Inrush current limit circuit
Cooling fan
Tab. 7-4:
Initial values differ according to the inverter capacity (refer to page 5-233 for details).
NOTE Refer to page 5-230 to perform the life check of the inverter parts.
7 - 6
Estimated lifespan
10 years
10 years
10 years
⎯
10 years
Wearing parts
Judgment level
85% of the initial capacity
Estimated remaining life 10%
Estimated remaining life 10% (Power ON: 100,000 times left)
Less than 50% of the specified speed.
Guideline for the warning signal output
Precautions for maintenance and inspection
Description
Replace (as required)
Replace (as required)
Replace the board (as required)
As required
Replace the fuse (as required)