9.1.11 Cleaning the cooling water ducts
To ensure proper functioning of the machine cooling system, the cooling water ducts must be
free of dirt deposits. In addition to the cooling water connection points, the cooling water ducts
in the stator frame have additional openings for cleaning, which are sealed by screw plugs.
● Have the cooling water ducts cleaned by a specialist company. Cleaning involves circulating
suitable agents through the cooling water ducts until any dirt deposits can be loosened and
flushed out.
● The cooling duct connecting holes at the transition locations between the stator housing
and the end shields each have an R 3/8" thread. Connecting pipes or sealing plugs can be
screwed into this thread if you wish to clean the cooling water ducts with cleaning liquids.
Recut the thread if necessary.
● You can remove limescale deposits with a commercially available scale solvent.
9.1.12 Touch up any damaged paintwork
If the paint is damaged, it must be repaired in order to protect the unit against corrosion.
Note
Paint system
Contact the Service Center (Page 129) before you repair any paint damage. They will provide
you with more information about the correct paint system and methods of repairing paint
damage.
9.1.13 Maintaining terminal boxes
Requirement
The machine is de-energized.
Checking the terminal box
● Terminal boxes must be regularly checked for tightness, undamaged insulation, and tight
terminal connections.
● If dust or humidity have infiltrated the terminal box, this should be cleaned and dried
(particularly the insulators).
Check all the seals and sealing surfaces and address the cause of the leakiness.
Maintenance
9.1 Inspection and maintenance
SIMOTICS TN Series N-compact 1LH8
102 Operating Instructions 06/2017
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