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88 Maintenance
Control unit
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BCU control unit types
There are three variants of the BCU control unit used in ACS880: 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.
￭
Replacing the memory unit
After replacing a control unit, you can retain the existing parameter settings 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.
1. Stop the drive and do the steps in section
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.
￭
Replacing the BCU control unit battery
Replace the real-time clock battery if the BATT OK LED is not illuminated when the control
unit is powered.
1. Stop the drive and do the steps in section
you start the work.
2. Undo the fastening screw and remove the battery
3. Replace the battery with a new BR2032 battery.
4. Dispose of the old battery according to local disposal rules or applicable laws.
Electrical safety precautions (page 60)
Electrical safety precautions (page 60)
before
before
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