141Maintenance
EN
8.3 Routine maintenance
To preserve long term proper operation of the inverter, you are advised to perform the routine maintenance
operations listed in this paragraph.
ATTENTION – A 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.
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 on the external arrays of cooling fan.
Annual operations
• 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.
Annual cleaning
• Clean the equipment; in particular, clean the side and top arrays of the cooling
fan assembly and the heat sink.
NOTE – D For a complete maintenance procedure ask for “Preventive Maintenance -Life Cycle”
to ABB costumer service.
8.3.1 Recommended replacement intervals of components
To preserve long term proper operation of the inverter it’s advisable to follow the recommended
replacement schedule specified below:
Component Years from start-up
3 6 9 12 15 18 21 24
External Fan section X X X X
Internal Fan section X X
ATTENTION – A The replacement schedule may vary depending on the environmental conditions
of the installation (e.g. high dust environment).
NOTE – D Refer to following paragraphs to know how to replace each listed component.
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