Internal Wiring; System Adjustments; Voltage Adjustments And Response - HindlePower SCR series Operating Instructions Manual

1. Before attempting to check the output ripple, it should be determined that in all other respects
the charger is operating normally. Having determined this, the ripple may be checked as follows. Connect
a sensitive AC voltmeter (digital type preferred) to the battery terminals and measure the AC ripple
voltage. If it measures more than 30 millivolts RMS check the following:
(a). That the battery connected to the output terminals of the charger has an 8-hour ampere-hour
rating of at least four times the rated capacity in amperes of the charger.
(b). The ripple is measured at the terminals of the battery.
(c). Check capacitors C1 and C2 as follows: Switch the voltohmmeter to the R x 100 scale and
connect the red lead to the capacitor plus terminal (marked by a red dot or plus sign) and the black lead to
the negative terminal. The meter should initially swing up scale toward zero ohms, then come back as the
capacitor charges. A reading of zero ohms indicates a shorted capacitor while no initial swing means an
open capacitor. Either an open or shorted capacitor should be replaced.
l. Internal Wiring
1. Check internal wiring for obvious mechanical faults or wear. Follow the schematic diagram on
page 28 and check continuity with an ohmmeter to determine open connections. Check wiring against
ground also, and remove any grounds.

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 ADJ. INEFFECTIVE" have been made without locating the fault, switch CB1
to OFF. Switch 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 CB2 breaker or connect charger to battery. Close CB1 breaker. 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.
SECTION IV

SYSTEM ADJUSTMENTS

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