Exide Technologies Section 94.30 - Manual (Page 55)

SERVICING THE AT10.1
51
SYMPTOM PROBABLE
CAUSE
RECOMMENDED ACTION
No output
current, but ac
and dc
breakers are
on;
AC ON
lamp is out
1. AC supply
failure
2. Input fuse F1
or F2 is blown
3. Defective
wiring
4. Defective
transformer T1
1. If AC ON indicator is out, the check feeder circuit breaker or
fuse.
2. Remove the ac fuses (F1/F2) from the fuse holder and check
with an Ohmmeter or fuse tester. Replace ac fuses (F1/F2) if
required.
NOTE: If the new fuse blows, see the Sections titled "AC breaker
trips immediately" and "AC breaker trips after a few minutes" for
further troubleshooting hints.
3. Check terminals and wiring between the transformer (T1) and
the rectifier bridge assembly, main inductor (L1), dc filter
assembly (if present), the dc breaker and/or fuses, and the output
terminals. Check wire #
44 from T1-Y1 and wire # 45 from T1-Y2
to the Gate Driver pc board connector (J18). Repair as necessary.
4. Use an ac voltmeter to measure the ac voltage from T1-X1 to
X5. It is normally 50% to 80% higher than the rated dc output
voltage. If it is too low, check the wiring of the primary taps. See
Section 1.6 for details. If it is zero, replace the transformer (T1).
No output
current, but ac
and dc
breakers are
on;
AC ON
lamp is on
1. Battery is fully
charged
2. Float or
Equalize voltage
set too low
3. Wrong ac
input voltage, or
T1 taps
miswired
4. Defective
wiring
5. Defective
rectifier bridge
6. Defective
Gate Driver pc
board A11
7. Defective
transformer T1
8. Defective
inductor L1 or L2
9. Defective dc
circuit breaker
(CB2)
1. This is normal operation in a system with little or no dc load. As
long as the charger maintains Float voltage, it is operating
normally.
2. Check the Float and Equalize voltages and adjust them if
necessary. Consult your battery manufacturer for the proper
voltage settings.
3. Be sure the main transformer (T1) primary taps are wired
correctly for your input voltage. See Section 1.6 for details.
4. Check terminals and wiring between the transformer (T1) and
the rectifier bridge assembly, main inductor (L1), dc filter
assembly (if present), the dc breaker and/or fuses, and the output
terminals. Repair as necessary.
5. Use an ac voltmeter to measure the voltage between the two
SCR gate leads on each SCR module. If you measure about 1.0
Volt rms, but there is no output current, replace the rectifier
module.
6. If you do not measure any ac voltage in step 5 above, and the
battery voltage is less than the Float voltage setting, replace the
Gate Driver pc board (A11).
7. Use an ac voltmeter to measure the ac voltage from T1-X1 to
X5. It is normally 50% to 80% higher than the rated dc output
voltage. If it is too low, check the wiring of the primary taps. See
Section 1.6 for details. If it is zero, replace the transformer (T1).
8. Disconnect the wiring from the main inductor (L1) and measure
the resistance between the terminals. If it is an open circuit,
replace L1. Repeat for L2 if the optional dc filter is installed.
9. Disconnect the battery, and connect a light dc load to the
charger. Measure the dc voltage across TB1(+) and TB1(-), with
the breaker on. If no voltage is measured, replace the breaker.