Kongsberg ACS500, Instruction Manual

Page: 80 / 148

Kongsberg ACS500
Subsea Control Unit
Maintenance on the SCU is mostly changing the battery and checking the seals before
the unit is deployed in water.
SCU maintenance overview
Every time the Subsea Control Unit is taken out of the water
• Clean the unit.
Every time the Subsea Control Unit has been opened
• Test the O-ring by using the interseal test port.
Every year
• Test all O-rings by using the interseal test ports.
Cleaning the Subsea Control Unit
Purpose
This procedure explains how to clean the SCU.
Clean the unit before opening it.
Procedure
1
Use a wooden or plastic scraper or a stiff brush (not wire) to remove shells and
growth.
Be careful not to damage the paint as this leads to corrosion.
2 Ensure that all dirt, slime and growth is removed.
3 Clean the unit thoroughly with lots of fresh water.
4
Dry the unit thoroughly. Dry off any water around the end cap and the vent screw.
5 If the unit is not to be dismounted from the valve package before performing
maintenance, erect a protective cover over the unit to prevent water and dirt coming
inside the unit when the lid is opened.
Opening the Subsea Control Unit
Purpose
This procedure explains how to open the SCU.
Clean and dry the unit thoroughly before opening. Make sure no water or dirt may fall
into the unit from above.
Procedure
1
Remove the six M6 screws.
78
397128/C