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120 Maintenance
￭
Recommended maintenance intervals after start-up
Recommended annual actions by the user
Connections and environment
Quality of supply voltage
Spare parts
Spare parts
Reforming DC circuit capacitors of spare modules
Inspections
Tightness of terminals
Dustiness, corrosion and temperature
Cleaning the heatsink
Maintenance task/object
Cooling fans (frames R1...R4)
Main cooling fan
Batteries
Control panel battery
Functional safety
Safety function test
Safety component expiry (Mission time T M )
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.
Years from start-up
3
6
9
R
R
See the maintenance information of the safety
function.
20 years
P
I
P
I
I
P
12
15
18
R
R
R
I
21
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