INSTRUCTION / TROUBLESHOOTING MANUAL FOR MODEL A75MD
PAGE 10 OF 22
flash drive. The file name is called SETTINGS.CSV.
14.
Saving Settings
– No input required. Customer Calibration changes are saved automatically.
* NOTE: DCA Start, DCA Finish and DCV1 REF are critical charge curve parameters which should not be
changed unless the settings have been determined to be incorrect. If not set properly, incorrect adjustments
may damage the battery.
After making the desired selections in Customer Calibration, proceed to step C.
C. Connect the battery to the charger. Press the green START pushbutton. After the selected time delay
passes, the AC contactor will pull in and the charger current output will slowly ramp up to the starting rate.
During the ramp up stage, the "Ramp Up" lamp will be lit. When the start rate is reached, the "Ramp Up" lamp
will extinguish and the "Start Rate" lamp will illuminate. If a fully charged battery is connected, the charger will
charge for 15 minutes and then turn off. The VFD will alternate between "Fully Charged Battery", "Elapsed
Time" and "AH Returned".
If the charger is equipped with the optional Data Logging and it is enabled, the start up routine will be as
follows:
After applying AC, connecting the battery and pressing the START pushbutton, "Acquiring Battery ID" will be
displayed on the VFD. If a battery ID device is present, the ID will be displayed. If there is no battery ID
detected, one can be entered at this point. The first digit of the four digit ID display will flash. Use arrow
pushbuttons to enter first digit of the ID. Press MODE to advance to the next digit and select it. Press Mode
again to advance and then set the third digit. Press MODE a third time to advance to the fourth digit and select
it. Press MODE again. The charger will now start.
If an ID is not available, press the MODE button four times to assign ID 0000. The charger will start.
Please see Data Logging Option section at the end of this manual for more information.
If a battery with the wrong number of cells is connected one of four messages will be displayed:
1.
High Battery
– The battery voltage is above 2.5 volts per cell.
2.
OVER Discharged Battery –
The battery voltage is between 1.4 and 1.75 volts per cell
3.
Low Battery
– The battery voltage is between 1.1 and 1.4 volts per cell.
4.
Extra Low
– The battery voltage is between 0.5 and 1.1 volts per cell.
The charger will automatically detect and charge a battery with the terminal voltage between 1.75 and 2.5 volts
per cell. If the battery voltage is between 1.1 and 1.75 volts per cell the charger can be started by pressing
and holding the MODE button. This feature defeats the automatic detection circuit! Make sure the correct
battery is hooked up to the charger. Should the display indicate “Low Battery” a qualified battery technician
must be sent to verify battery health. Another possible circumstance may be that a battery of improper cell
count has been connected.
D. When the "80% CHARGE” point is reached the charger enters the constant voltage stage and the "Constant
Voltage" lamp will illuminate.
E. When the output current reaches finish rate, the "Finish Rate" lamp will illuminate. This is the final stage of
the charge cycle.
F. During the charging cycle you can scroll through the following screens by using the UP and DOWN
pushbuttons (refer to flow chart on page 18):
1.
Voltage / Current
– Displays output voltage and current
2.
A-H Returned
– Displays Ampere Hours returned into the battery
3.
Date / Time
– Displays current date and time
4.
Elapsed Time
– Displays the time since the charger started charging the battery.
