130 Maintenance
Control units
BCU control unit types
ACS880-07XT uses BCU-02 control unit. There are three variants of the BCU control unit
used in ACS880 drives: BCU-02, BCU-12 and BCU-22. These have a different number of
converter module connections (2, 7 and 12 respectively) but are otherwise identical. The
three BCU types are interchangeable as long as the number of connections is sufficient.
For example, the BCU-22 can be used as a direct replacement for both BCU-02 and BCU-
12.
Memory unit
After replacing a supply or inverter control unit, the existing parameter settings can be
retained by transferring the memory unit from the defective control unit to the new control
unit.
WARNING! Do not remove or insert the memory unit when the control unit is
powered.
WARNING! Obey the instructions in chapter Safety instructions. If you
ignore them, injury or death, or damage to the equipment can occur.
1. Do the steps in section Precautions before electrical work before you start the work.
2. Make sure that the control unit is not powered.
3. Undo the fastening screw and pull the memory unit out.
4. Install a memory unit in reverse order.
One end of the BCU control unit
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