Mitsubishi Electric FR-CC2-P, Instruction Manual

Page: 159 / 184

Inspection item
158
PRECAUTIONS FOR MAINTENANCE AND INSPECTION
7.1.6
Replacement of parts
The converter unit 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 converter unit. 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.)

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.
The life warning output can be used as a guideline for life judgment.
NOTE
• Refer to page 93 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)
Parts 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 Less than 50% of the specified speed.