INSTRUCTION / TROUBLESHOOTING MANUAL FOR MODEL A75MD
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will not start and the VFD will indicate "Wrong Battery".
A STOP pushbutton is provided to stop the charging cycle. Be sure to push this button before disconnecting
the battery during the charge cycle. If the charger goes thru a normal charge complete cycle, there is no need
to push the STOP button prior to disconnecting the battery.
For the "Standard Mode" the charger will charge the battery until the battery voltage levels. This process may
take up to 3 hours after the finish rate is reached depending on the condition of the battery. For the "Equalize
Mode" the charger will also charge the battery until the battery voltage levels but additional time will be added
if equalize mode is activated. This process may take up to 6 hours after the finish rate is reached depending on
the condition of the battery.
The MODE button is provided so that equalizing may be selected. Equalizing should be done periodically as
recommended by the battery manufacturer. This button, when activated, will start the equalize charge mode
for that cycle only. After completion of the cycle, the charger will automatically be reset to the "Standard
Charge" mode.
NOTE
:
The MODE button can also be used to start the charger even if a battery is discharged below 1.75 volts
per cell but is above 1.1 volts per cell. Caution must be used when using this feature to start the charger
because the initial battery voltage sensing is being disabled and the wrong battery could be connected. To
initiate this feature press and hold the MODE switch.
Disconnecting the output connector or opening the battery breaker while a battery is being
charged is not recommended.
If the battery is disconnected during a charge cycle, the control will turn off
the charger, the "Charger On" lamp will go out, all timers will reset. Under these conditions the present log
record will be lost.
After starting, the 12 hour override timer is activated. This timer is independent of battery conditions and
overrides all other timing functions. The override timer will terminate the charge in the event that the 80%
timing control does not terminate the charge before the maximum time limit of 12 hours is reached. The
"Charger On" light will turn off, the "Fault" lamp will light and the display will indicate "Override Timer”. If this
occurs, push and hold the STOP pushbutton until the “Fault” lamp illuminates solid red, then release the STOP
pushbutton. The unit will reset and the lamp test will blink all lamps and after a short delay the “Fault” lamp
will switch from solid to blinking as part of the lamp test.
If the AC input line fails during the charge cycle, all internal time registers will hold their count until the power
returns. The charge cycle will then resume from where it left off. The "Fault" lamp will light and "AC Failure" is
displayed on the VFD if this condition is reached. After power is restored, the "Fault" lamp will extinguish and
the VFD will display an operating parameter screen.
A high DC voltage feature is incorporated in the charge control system. If an unusually high voltage condition
is reached as a result of a charger malfunction, the high voltage feature will terminate the charge cycle and
turn on the "Fault" light. “High Voltage” will be displayed on the VFD. In this mode the charger will not restart
again unless the charger is reset. Push and hold the STOP pushbutton until the “Fault” lamp illuminates solid
red, then release the STOP pushbutton. The unit will reset and the lamp test will blink all lamps and after a
short delay the “Fault” lamp will switch from solid to blinking as part of the lamp test. Restart the charger.
If the high voltage condition still exists the charger will again turn off.
At this point, a factory service
representative should be contacted.
An additional Analog High Voltage Shutdown feature is incorporated for further protection. In the unlikely
situation of multiple software failures and the output is able to rise above 2.75 volts per cell, the Analog High
Voltage shutdown will activate. The charger will shut off and reset automatically. The “Fault” Lamp will stay lit
until the output voltage reaches an appropriate level. If upon reset the problem is not resolved and the fault
lamp does not turn off, the charger will not be able to be started.
At this point, a factory service
representative should be contacted
.
INSTALLATION
