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7. PRECAUTIONS FOR MAINTENANCE AND INSPECTION
7.1 Inspection item
1
2
3
4
5
6
7
8
9
10
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
Input current: 80% of the converter unit rating
NOTE
• For parts replacement, contact the nearest Mitsubishi FA center.
Converter unit parts life display
The converter unit diagnoses the 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.
Guideline for life judgment using the life warning output
NOTE
• Refer to
to perform the life check of the converter unit 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
10 years
Replace (as required)
Part
Judgment level
Control circuit capacitor
Estimated remaining life 10%
Inrush current limit circuit
Estimated remaining life 10% (Power ON: 100,000 times left)
Cooling fan
Not more than the specified speed
