Recommended annual actions by the user
PDC circuit capacitors reforming for spare modules and spare capacitors
Inspections by user
ITightness of terminals
IDustiness, corrosion and temperature
PHeat sink cleaning
Years from start-upMaintenance task/object
21181512963
Cooling fans
(R)R(R)R(R)R(R)
Main cooling fan
1)
(R)(R)(R)
Functional safety
ISafety function test
See the maintenance information of the safety function.
20 yearsSafety component expiry (Mission
time T
M
)
1)
(R) = replacement of component in demanding operating conditions, ie. if surrounding air temperature in
continuous operation is over 40 °C (104 °F) or there is a cyclic heavy load.
Note:
• Maintenance and component replacement intervals are based on the assumption
that the equipment is operated within the specified ratings and ambient conditions.
ABB recommends annual drive inspections to ensure the highest reliability and
optimum performance.
• Long term operation near the specified maximum ratings or ambient conditions may
require shorter maintenance intervals for certain components. Consult your local
ABB Service representative for additional maintenance recommendations.
Functional safety components
The mission time of functional safety components is 20 years which equals the time
during which failure rates of electronic components remain constant. This applies to the
components of the standard Safe torque off circuit as well as any modules, relays and,
typically, any other components that are part of functional safety circuits.
The expiry of mission time terminates the certification and SIL/PL classification of the
safety function. The following options exist:
• Renewal of the whole drive and all optional functional safety module(s) and
components.
120 Maintenance
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