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Maintenance
Contents of this chapter
This chapter describes the maintenance of a brake unit.
Maintenance intervals
The table below shows the maintenance tasks which can be done by the end user. The
complete maintenance schedule is available on the Internet (www.abb.com/drivesservices).
For more information, consult your local ABB Service representative
(www.abb.com/searchchannels).
Maintenance task/object
Coolant
Checking coolant antifreeze concentration
Checking coolant quality
Coolant draining and replacement
Cooling fan
Cooling fans (chopper and resistor)
Inspections
Checking tightness of cable and busbar termin-
als. Tightening if needed.
Checking ambient conditions (dustiness, corro-
sion, temperature)
Checking coolant pipe connections
Symbols
Years from start-up
0
1
2
3
4
5
P
P
P
P
P
P
P
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
Maintenance 43
9
6
7
8
9
10
11
P
P
P
P
P
P
P
P
P
R
R
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
12
...
P
P
R
I
I
I
I
I
I
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