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Installation Supplement for ACS550-U2 Drives

Maintenance

This section describes the procedure for separating the drive and extension

modules, which is required to provide service access to the drive module.

Safety

WARNING! Read "Safety" on the first pages of this manual before performing any

maintenance on the equipment. Ignoring the safety instructions can cause injury or

death. Note: There are parts carrying dangerous voltages near the OMIO board

when the drive is powered.

Separating the Drive and Extension Modules

The drive module is mounted on a trolley that straddles a pedestal. The following

procedure removes mechanical connections so that the drive module and trolley can

roll forward for service access.

1. Disconnect all power sources from the drive/

extension modules and wait at least 5 minutes for

internal capacitors to fully discharge.

2. Remove all front covers from the drive module.

3. Disconnect the control panel cable.

4. Remove the upper side plate from the drive module

if convenient.

5. Remove screws (if any) that fasten the drive module

to the wall.

6. Inside the pedestal, toward the rear are screws that

attach the drive bus bars to the pedestal bus bars.

The connections are staggered for easy access

using a wrench with an extension. Remove these

screws (6).

Torque when re-assembling:

• R7: M8 (5/16 in) screws, 15...22 Nm (11...16 lb

ft)

• R8: M10 (3/8 in) screws, 30...44 Nm (22...32 lb

ft)

Warning! Be careful not to drop screws inside the

pedestal. Loose metal pieces inside the unit may

cause damage.

Maintenance