Mitsubishi Electric FR-A800, Instruction Manual

Page: 940 / 1042

Inspection item Precautions for maintenance and inspection
7 - 6
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
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.
Initial values differ according to the inverter capacity (refer to page 5-225 for details).
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)
Tab. 7-3: Wearing parts
NOTES For parts replacement, contact the nearest Mitsubishi FA center.
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.
Tab. 7-4: Guideline for the warning signal output
NOTE Refer to page 5-222 to perform the life check of the inverter parts.