Replacing the ZCU-12 control unit battery
Contact ABB service center for instructions on how to replace the control unit battery.
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 Overview of power and control connections, another
on the line-side converter control unit.
￭ Replacing the memory unit of ZCU-14
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. After power-up, the
drive will scan the memory unit. This can take several minutes.
WARNING!
Do not remove or insert the memory unit when the control unit is powered.
WARNING!
Obey the safety instructions of the drive. If you ignore them, injury or death,
or damage to the equipment can occur.
1.
Stop the drive and do the steps in section Electrical safety precautions (page 18) before
you start the work.
2. Pull the clip of the memory forward.
3. Take the unit off.
4. Replace the unit in reverse order.
￭ Replacing the memory unit of the line-side converter control unit
(ZCU-12)
1.
Stop the drive and do the steps in section Electrical safety precautions (page 18) before
you start the work.
2. Remove the cover on the memory unit.
3. Pull the memory unit out.
4. Install the new memory unit in reverse order.
Maintenance 171
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