INSTRUCTION / TROUBLESHOOTING MANUAL FOR MODEL A70B
PAGE 10 OF 16
F. Connect the battery to the charger. After a 5 second delay, which assures proper battery connection, the AC
contactor should close and the on charge light should turn on. The battery charger should start to charge,
showing output amps on the digital display. This completes the "Autostart” sequence. If a battery with the
wrong number of cells is connected or the AC input line voltage is not within the operating range, the unit will
not start and the "FAILURE" light will be on. The digital display will indicate the cause of failure. This
condition will also occur if the battery being connected is discharged so deeply that the open terminal voltage
will not come up to the 1.6 volts/cell required to initiate the start cycle.
NOTE: To disable this feature push the equalize button. Caution: Make sure a battery with the correct
number of cells is connected to the charger.
G. If the A70B has been programmed for a "start delay” other than 0 hours, the "ON CHARGE” light will flash
at a one second rate and the digital display will indicate time remaining until charger cycle begins. After the
"start delay” is finished, the unit will perform an autostart sequence; if the battery is still connected, the "ON
CHARGE” lamp will light without flashing. If the battery is disconnected during "start delay", the A70B will reset
and the "start delay" will begin over again once the battery is reconnected.
H. When the "80% CHARGE” point is reached in the charge cycle, the "80%/COMPLETE" light will flash. There
will be an additional 3 hours (6 hours in the equalize mode) of charge after this point is reached.
I. When the charge cycle is completed, the charge "80%/COMPLETE" light will flash at one-second intervals
and the "ON CHARGE" lamp will turn off. Rapid flashing of 80% light indicates a low current shutoff. Usually
this indicates the battery is fully charged. If the charger turns off on rate, the charge "80% COMPLETE” light
will turn on without flashing and the "ON CHARGE" light will turn off.
J. If for some reason the AC input voltage falls below the factory set limit (about 85%), the "FAILURE” light
will turn on and the battery charger will turn off. The display will indicate number "0001". During this interval,
the time registers in the microprocessor are held at their present count. When the AC has returned to normal,
the charge cycle resumes where it left off. Code "0002" indicates high AC voltage.
K. If for some reason the normal, equalize, or rate timers do not terminate the charge cycle in less than 12
hours, the override timer will time out, shut down the charger and turn on the "FAILURE" light. The display will
indicate number "0004".
L. If for some reason, the unit output current exceeds 105% of its output, simultaneous with high DC voltage,
an independent software shutdown will stop the charger. The display will indicate number "0005." In this
condition, the lamps will not update and the unit will not turn back on until the on/off switch has been toggled.
The A70B will reset back to the autostart mode when the battery is disconnected, or when the on/off switch is
turned "off” and then "on" again. In the autostart mode, four (4) eight's ("8888") will be held on the display.
NOTE: TURN THE ON/OFF SWITCH TO THE OFF POSITION BEFORE DISCONNECTING THE
BATTERY DURING A CHARGE CYCLE.
M. If the battery current rises approximately 10% during the charge cycle, the charger will turn off and the
display will indicate number 0006.
N. If a fully-charged battery is connected, the charger will turn off in fifteen (15) minutes and the complete
light will flash at a 5-second interval. The display will flash elapse time of charge and DC voltage alternately.
To bypass this function, push the equalize switch and the unit will charge the battery for up to six (6) additional
hours.
