Maintenance 57
To replace the transformer room circulation fan
1. Make sure that all power to the cooling fans is disconnected.
2. Disconnect the cables from the fan power connection.
3. Remove the screws that hold the circulation fan.
4. Remove the circulation fan.
5. Install the new circulation fan.
6. Install and tighten the screws.
To replace the UPS (if applicable)
Refer to the UPS documentation for more information.
1. Disconnect power from the AC cabinet and the UPS.
2. Measure to make sure that there are no voltages present.
3. Disconnect the UPS connection.
4. Disconnect the battery modules and the applicable cables.
5. Replace the UPS module.
To seal the door gaskets
For a good seal, apply black filler to all of the door gaskets. Refer to the manufacturers
documentation for information on how to use the filler.
You can also use silicon spray to improve the sealing of the gaskets.
To repair the non-painted zinc-coated surfaces
To repair the zinc-coated surfaces, you need:
• Sand paper
• Cleaning towels and liquids
• Zinc-coating: Würth Zinc 300 0892 200 with brush or Zinc Spray Perfect 0893 114 113
(or equivalent)
Refer to the instructions of the material manufacturers.
WARNING! Obey the Safety instructions on page 9, and the local safety
regulations. If you ignore them, physical injury or death, or damage to the
equipment may occur.
Pay attention to the doors and the lower parts of the walls. These areas have potentially
corrosive elements such as dust and humidity.
If there is damage to the zinc-coating:
1. Carefully remove any rust with sand paper.
2. Clean the damaged area and its surroundings.
3. Coat the damaged area with the zinc coat. ABB recommeds Würth Zinc 300 due to the
thicker coat. On large areas, you can use Würth Zinc Spray Perfect to ease the work
and to get an even surface.
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