Exide Technologies Section 94.30 - Manual (Page 62)

SERVICING THE AT10.1
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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 drawings in Appendix C while performing the
following procedures.
Removing the safety shield
Some of the repair procedures described below requires removal of the
clear plastic safety shield that covers the internal components mounted
inside the enclosure. Remove the plexiglas shield by removing the
fasteners from the front lip of the enclosure. Do not lay the shield on 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.