Servicing the at10.1 – Exide Technologies Section 94.20 User Manual

Page 62

SERVICING THE AT10.1

3.5. REPLACING DEFECTIVE COMPONENTS

WARNING

High voltages appear at several points inside the AT10.1. Use extreme
caution when working inside the unit. Do not attempt to work inside the
AT10.1 unless you are a qualified technician or electrician.

Disconnect and lock out all power from the AT10.1 before starting to
remove or replace any components. Turn the ac power off at the
distribution panel upstream from the charger. Disconnect the battery
from the AT10.1 output terminals TB1(+/-).

NOTE: Refer to the standard drawings in Appendix C while performing
the following procedures.

Removing the safety shield

Some of the repair procedures described below requires removal of the
plexiglas safety shield, mounted in front of the I/O panel. Unscrew the
wing nuts and remove the washers to remove the shield. Do not lay the
shield on the top of the AT10.1. The top vents are required for cooling.

CAUTION: Hazardous ac and dc voltages are present on the I/O
panel terminals and several internal components.

Removing the enclosure shroud

You may need to remove the enclosure shroud in order to make some
internal measurements, and to replace or repair components. Turn off and
remove all power to the AT10.1. Disconnect the battery from the output
terminals.

Remove the eleven (11) screws that hold the shroud on the rear and
bottom of the enclosure, then the two screws on the left side that hold the
rectifier heat sink assembly. Support the front panel and lift the shroud
straight up to remove it. Be sure to save the plastic washers from the door
hinge.

The heat sink assembly is supported from the rear panel. Avoid putting
any mechanical stress on the heat sink.

Replacing the enclosure shroud

Lower the shroud onto the enclosure base. Install and tighten the eleven
(11) screws that hold the shroud on the rear and bottom of the base before
you install the two screws that support the heat sink assembly on the left
side wall. Remember to reinstall the plastic washers on the door hinge.