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74 Maintenance
Reinstalling the module
￭
1. Push the module carefully into its bay.
2. Fasten the retaining screws at the top and the bottom of the module.
3. Reinstall the DC busbars at the top of the module.
4. Reconnect the coolant pipes to the module.
WARNING!
To avoid breaking the coolant pipes, do not overtighten the nuts of the unions.
Leave 2 to 3 millimeters (0.08 to 0.12 inches) of thread visible.
5. Reconnect the control wiring to the module.
6. Fill up the cooling system. For instructions, see section
cooling
circuit.
7. Close the swing-out frame (if present). Reinstall all shrouds removed earlier.
Capacitors
The DC link of the drive contains several electrolytic capacitors. Operating time, load, and
surrounding air temperature have an effect on the life of the capacitors. Capacitor life can
be extended by decreasing the surrounding air temperature.
Capacitor failure is usually followed by damage to the unit and an input cable fuse failure,
or a fault trip. If you think that any capacitors in the drive have failed, contact ABB.
Reforming the capacitors
￭
The capacitors must be reformed if the drive has not been powered (either in storage or
unused) for a year or more. The manufacturing date is on the type designation label. For
information on reforming the capacitors, see Capacitor reforming instructions
[English]) in the ABB Library (https://library.abb.com/en).
Fuses
Replacing the brake chopper fuses
￭
WARNING!
Obey the safety instructions of the drive. If you ignore them, injury or death,
or damage to the equipment can occur.
WARNING!
Use the required personal protective equipment. Wear protective gloves and long
sleeves. Some parts have sharp edges.
2 mm
Filling up and bleeding the internal
(3BFE64059629
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