ABB ACS880-1604LC, Hardware Manual

Page: 85 / 200

DC/DC converter module
￭ Replacing the R8i DC/DC converter module
WARNING!
Obey the safety instructions given in Safety instructions for ACS880
liquid-cooled multidrive cabinets and modules (3AXD50000048633
[English]). If you ignore the safety instructions, injury or death, or damage
to the equipment can occur.
If you are not a qualified electrician, do not do installation or maintenance
work.
WARNING!
Make sure that the replacement module has exactly the same type code as the
old module.
WARNING!
Beware of hot coolant. Do not work on the liquid cooling system until the pressure
is lowered down by stopping the pumps and draining the coolant. High-pressure
warm coolant (6 bar, max. 50 °C) is present in the internal cooling circuit when it
is in operation.
WARNING!
Use the required personal protective equipment. Wear protective gloves and long
sleeves. Some parts have sharp edges.
Removing the module
1. Repeat the steps described in section Electrical safety precautions.
2. Remove the shrouding in front of the module.
3. Undo the locking screws of the swing-out frame (if present) and open it.
4. Unplug the wiring from the module and move it aside. Use cable ties to keep the wiring
out of the way.
5. Remove the L-shaped DC busbars at the top of the module. Make note of the orientation
of the screws as well as the order of the washers.
Maintenance 85