Hardware Manual

Table Of Contents
Maintenance 143
Capacitor failure is usually followed by damage to the unit and an input cable fuse
failure, or a fault trip. Contact ABB if capacitor failure is suspected. Replacements are
available from ABB. Do not use other than ABB specified spare parts.
Reforming the capacitors
Reform the capacitors if the drive has not been powered for a year or more. See page
33 for information on finding out the manufacturing date. For information on reforming
the capacitors, see Converter module capacitor reforming instructions
(3BFE64059629 [English]).
Memory unit
When a drive is replaced, the parameter settings can be retained by transferring the
memory unit from the defective drive to the new drive. The memory unit is located on
the control unit, see page 31.
WARNING! Do not remove or insert a memory unit when the drive is powered
or the control unit is powered from an external power source.
After power-up, the drive will scan the memory unit. If different parameter settings are
detected, they are copied to the drive. This may take several minutes.
Replacing the memory unit
Undo the memory unit mounting screw and take the memory unit up. Replace the unit
in reverse order. Note: There is a spare screw next to the memory unit slot.