Exide Technologies JA5009-00 - Manual (Page 15)

11
SECTION IV
SYSTEM ADJUSTMENTS
1. VOLTAGE ADJUSTMENTS AND RESPONSE
When abnormal output voltage exists (or no output current is present), and the previous checks in
Table A on page 27 “VOLTAGE ADJUST INEFFECTIVE” have been made without locating the fault,
switch the AC breaker (CB1) to OFF. Switch the DC breaker (CB2) to OFF or disconnect the battery and
proceed as follows:
Check the battery with a portable voltmeter of one percent accuracy to insure that it is not higher
than the rated float voltage. For proper operation, the open circuit voltage of the battery must be slightly
lower than the rated float voltage. If the battery voltage is higher than the float voltage range, check the
number and type of cells connected to the charger making certain the proper number and type of cells are
not exceeded. Close the DC breaker (CB2) or connect charger to battery. Close the AC breaker (CB1). If
battery voltage is now within the float voltage range or is slightly lower and some output current exists,
proceed with Section IV, 1, a, 2 below.
If the battery voltage is slightly lower or within the float voltage range, switch the charger to the
equalize mode. If still no output appears, or the potentiometer (R5) does not produce a rise from the
previous value, turn equalize charge control fully clockwise, and if still no voltage rise is obtained or no
output appears, proceed again with the check sequence in Table A trouble-shooting chart. If the voltage
increased or output was obtained when the charger switched, to evaluate proceed with the voltage
adjustments.
a. Float Adjustment
1. Since the charger must be operable for this adjustment, preceding checks in Section IV, 1
above must indicate a serviceable charger. Set switch (SW1) to “FLOAT”. Use a portable voltmeter of
one percent accuracy. Connect the battery supply leads to the battery and close the DC (battery) breaker
(CB2). Set the AC breaker (CB1) to "ON".
2. Since the EQUALIZE and FLOAT potentiometer control settings interact with each other, it is
always necessary to adjust the FLOAT control first and then the EQUALIZE control afterward. Never
finalize a voltage adjustment with the charger output in excess of 100% rated output current.
3. Turn the control clockwise, watching the response on the voltmeter. Clockwise rotation should
cause the charger output current to increase rapidly, while the voltage should rise slowly. The rate of
voltage rise depends upon whether the battery is fully charged, the size of any connected load, and the
size of the charger versus the size of the battery. After getting several volts response in battery voltage
rise, turn the FLOAT control counterclockwise. This should result in a rapid drop in charger output
current and eventually in a slow decrease in battery voltage. Now adjust the voltage for the desired float
setting and tighten the locknut on the potentiometer.