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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.
● Have the cooling water ducts cleaned by a specialist company. Cleaning devices are
● You can also 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 177) 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
Repainting
Explosion hazard caused by incorrect painting
The paint coat can become electrostatically charged where there is a thick coat. Electrostatic
discharges can occur. There is a risk of explosion if potentially explosive mixtures are also
present at this moment. This can result in death, serious injury or material damage.
You must comply with one of the following requirements when you repaint painted surfaces:
● Limit the total paint film thickness according to the explosion protection group:
● Limit the surface resistance of the paint used:
SIMOTICS FD 1MH1
Operating Instructions 08/2017
connected to the coolant connections. Dirt is dissolved and rinsed out through the circulation
of suitable solutions in the cooling water ducts.
WARNING
– IIA, IIB: Total paint coating thickness ≤ 2 mm
– IIC: Overall coating thickness ≤ 0.2 mm for motors of group II (gas)
– Surface resistance ≤ 1 GΩ for motors of groups II and III (gas and dust)
Maintenance
9.1 Inspection and maintenance
143
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