ABB ACS880-1607, Hardware Manual

Page: 100 / 122

100 Maintenance
Control unit

BCU control unit types
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 control unit, the existing parameter settings can be retained by
transferring the memory unit from the defective unit to the new unit.
WARNING! Only qualified electricians are allowed to do this work. Read the
complete safety instructions of the drive. If you ignore them, injury or death, or
damage to the equipment can occur.
WARNING! Do not remove or insert the memory unit when the control unit is
powered.
1. Disconnect the drive from the AC power line and DC/DC converter from the energy
storage and obey the instructions in section Electrical safety precautions on page 42 .
See Disconnecting the DC/DC converter with DC switch/disconnector (F286)
on page 66 .
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.
Frame R8i: End of the BCU control unit