Maintenance 53
Maintenance intervals
The recommended maintenance and component replacement intervals are based on the
specified operational and environmental conditions. ABB recommends annual inspections
for high reliability and performance.
For more information on maintenance, contact your local ABB Service representative.
Recommended annual maintenance actions
ABB recommends that you do these annual inspections to ensure the highest reliability
and optimum performance of the unit.
Recommended maintenance intervals
For information on the maintenance on the MV transformer and the RMU, refer to the
applicable documentation.
Action Description
I Visually inspect and do maintenance if it is necessary.
P On/off-site performance work (commissioning, tests, measurements, etc.)
R Replace the component.
Target / task Action
Connections and the environment
Environment check I
Spare parts
Spare parts I
Inspections/tasks by the user
Dustiness, corrosion and temperature I
Air inlet and outlet grills I
Clean the air filters of the transformer and switchgear compartments I
Tightness and cleanliness of the main circuit terminals and earth connections I
Condition of the inverters: Door sealing, cooling fan operation. I
Clean the heat exchangers of the inverters I
Operation of the locks, hinges and gaskets I
Labeling I
Foundation condition (leveling) I
Component Years from start-up or interval
2 6 10 12 18 20 24
Main cooling fans
Main channel cooling fans R R R R
Cooling fan, LCL filter unit (internal and external) R R R R
Cabinet cooling fan
Main cabinet circulation fans R R R R
Control
Auxiliary power supplies R R
Auxiliary power buffers R R
Transformer and switchgear compartment
Cooling fans R R
Intake air filters R (every 2 years)
AC aux cabinet
Cooling fans R R
Intake air filters R (every 2 years)
UPS Obey manufacturer instructions
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