Exide Technologies Section 94.20 - Manual (Page 52)

SERVICING THE AT10.1
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3.3. USING THE TROUBLESHOOTING CHART
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(+/-).
Before you try to use the troubleshooting chart, be sure that you have
followed the steps in Section 3.1.
The troubleshooting chart that begins on the next page is divided into
three columns. To use the chart:
1. Make a list of the charger's condition, including the trouble symptoms.
2. Find the symptom(s) in the first column of the chart.
3. The middle column contains common causes for the problem you observe, in
order of probability.
4. Follow the action described in the right-hand column to correct the problem
and return the charger to normal service.
Determining the condition of the charger:
• Is the front panel AC ON indicator lit?
• What is the ac voltage at the input terminals (measured with an ac
voltmeter)?
• What is the dc voltage at the output terminals (measured with a dc
voltmeter)?
• Does the meter on the front panel display any voltage or current?
• Are any alarm indicators lit?
• Do the front panel status indicators work (Charge Mode, for example)?
• Can you change the charger to the Equalize mode and back to Float?
• Is the charger making any noise? Is it unusually loud?
• Is there any sign or smell of smoking or burning?
Refer to the wiring diagrams and parts layout drawings in Appendix C
while using the chart. For instructions on replacing components, see
Section 3.5.