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SERVICING THE AT30
48
3.3. USING THE TROUBLESHOOTING CHART
WARNING:
High voltages appear at several points inside the battery charger. Use
extreme caution when working inside the charger. Do not attempt to
work inside the charger unless you are a qualified technician or
electrician.
Disconnect and lock out all power from the battery charger before
starting to remove or replace any components. Turn the ac power off at
the distribution panel upstream from the battery charger. Disconnect the
battery from the charger output terminals.
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?
For instructions on replacing components, see Section 3.5 on page 58. For
information on identifying internal components, refer to the standard
drawings featured in Appendix C.
Summary of Contents for AT30 SERIES
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