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000846BG
8 - Maintenance
Routine maintenance
To preserve long term proper operation of the inverter, you are advised to
perform the routine maintenance operations listed in this chapter.
Maintenance operations shall be performed only by qualied personnel or ABB personnel
(under a servicing contract). The maintenance schedule may vary depending on the
environmental conditions of the installation.
Table: routine maintenance
Annual visual inspections
• 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 ns.
Annual operations
• Check the tightening of the cable glands and the screw terminal
blocks.
• Check the front cover is secured to the wiring boxes.
• 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
notication of recent malfunctions.
• For the models with AC+DC 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.
Annual cleaning • Clean the equipment; verify, in particular, clean the side arrays of the
cooling fan assembly and the heat sink.
For a complete maintenance procedure ask for “Preventive Maintenance -Life Cycle -
UAF.01963” to ABB costumer service.
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