172 Maintenance
Cleaning
See ACX-AP-x assistant control panels user’s manual (3AUA0000085685 [English]).
Replacing the control unit battery – external control unit
Stop the drive and do the steps in section Precautions before electrical work on page 18
before you start the work.
To replace the control unit battery:
1. Remove the M4x8 (T20) screws at the ends of the control unit.
2. To see the battery, remove the XD2D terminal block.
3. Carefully lift the edge of the control unit cover on the side with the I/O terminal blocks.
4. Carefully pull the battery out of the battery holder.
5. Carefully put a new CR2032 battery into the battery holder.
6. Close the control unit cover.
7. Tighten the M4×8 (T20) screws.
8. Install the XD2D terminal block.
Memory unit
When a drive module is replaced, the parameter settings can be retained by transferring
the memory unit from the defective drive module to the new module. One memory unit is
located in the external control unit, see page 38, another on the line-side converter control
unit.
WARNING! Do not remove or insert the memory unit when the drive module is
powered.
After power-up, the drive scans the memory unit. If a different control program or different
parameter settings are detected, they are copied to the drive. This can take several
minutes.
Replacing the drive control unit memory unit
1. Stop the drive and do the steps in section Precautions before electrical work on page
18 before you start the work.
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