Instruction manual

183
6
MAINTENANCE/INSPECTION
6.1.7 Replacement of parts
The inverter consists of many electronic parts such as semiconductor devices.
The following parts may deteriorate with age because of their structural or physical
characteristics, leading to reduced performance or failure of the inverter. For preventive
maintenance, the parts must be changed periodically.
* The design life of electrolytic capacitor is about eight years (50000h) if used for 20
hours a day and 300 days a year in the average yearly ambient temperature of 35°C.
Note: For part replacement, contact the nearest MGI office.
(1) Cooling fan
The cooling fan cools heat-generating parts such as the main circuit semiconductor
devices. The life of the cooling fan bearing is usually 10,000 to 35,000 hours. Hence,
the cooling fan must be changed every 2 to 3 years if the inverter is run continuously.
When unusual noise and/or vibration is noticed during inspection, the cooling fan must
be replaced immediately.
Part Name
Standard
Replacement Interval
Description
Cooling fan 2 to 3 years Replace (as required)
Smoothing capacitor in main circuit 8 years * Replace (as required)
Smoothing capacitor on control board 8 years *
Replace the board
(as required).
Inverter Model No. Fan Type
M4500E-002, 003 MMF-06D24ES-FC4 BKO-CA1027H09
M4500E-005, 007.5, 010 MMF-06D24ES-FC5 BKO-CA1027H10
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