8. Troubleshooting and Maintenance
8.5 Part Replacements
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 failure of the
inverter. For preventive maintenance, the parts must be changed periodically.
The parts replacement guidelines are indicated in the following table. Lamps
and other short-life parts must also be changed during periodic inspection.
Part name Change period (unit: Year) Description
Cooling fan 3
Exchange (as required)
main circuit
4
control board
4
Relays -
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