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R
outine maintenance
Maintenance operations shall be performed only by qualified personnel or ABB personnel
(under a servicing contract). The maintenance schedule may vary depending on the
environmental conditions of the installation.
Annual visual inspections
Annual operations
Annual cleaning
For a complete maintenance procedure ask for "Preventive Maintenance -Life Cycle" to ABB
costumer service.
To preserve long term proper operation of the inverter, you are advised to
perform the routine maintenance operations listed in this chapter.
Table: routine maintenance
• Check that the inverter is operating properly, without any alarm
signals.
• Ensure all labels and safety symbols are visible.
• Check the integrity of the cables, connectors and cable glands outside
the inverter.
• Check that the environmental conditions have not changed
dramatically from those on installation.
• Check there are no obstacles (animals, insects, leaves or anything
which could reduce the heat exchanging capacity of the heat sink) at
the top, at the bottom and between the fins.
• Check the tightening of the cable glands and the screw terminal
blocks.
• Check the front covers is secured.
• If there is no monitoring system, check the record of alarms and errors
using the indications provided in the manual in order to check recent
notification of recent malfunctions.
• For the models with AC disconnect switch, it is recommended that
once a year the disconnect switch is operated a number of times
(at least 10) to keep the contacts clean and prevent oxidation. This
operation must be carried out in periods with low input power or at
night.
• Clean the equipment; verify, in particular, clean the side and top
arrays of the cooling fan assembly and the heat sink.
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8 - Maintenance
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