Operating Instructions - Schumacher Electric DSR127 Owner's Manual

START/STOP BUTTON
Use this button to start or stop the charging process, after the battery is properly connected and battery
voltage and type have been selected. If the battery voltage is greater than 0.2 V, the display will briefly show
"ON" when the START/STOP button is pressed. After charging has started, pressing the START/STOP
button will cause the display to briefly show "OFF". If the battery voltage is 0.2 V or less and the START/
STOP button is pressed, the display will show "OFF". This indicates that charging has not started, due to
low battery voltage.
CHARGING LED INDICATORS
Charging (yellow/orange) lit – The charger is charging the battery.
Charged/Maintaining (green) lit – The battery is fully charged and the charger is in maintain mode.
Reversed Clamps (red) flashing – The connections are reversed.
NOTE: See Operating Instructions for a complete description of the charger modes.

11. OPERATING INSTRUCTIONS

OVERVIEW
Connect AC power and set the front panel ON/OFF switch to the ON position. Then select an unused
charging outlet from the eight available. Connect the battery, following the precautions listed under
sections 6 and 7. Select the appropriate Battery Voltage and Battery Type and press START. If the
battery voltage is greater than 0.2 V, charging will begin.
If charging begins, the Battery Voltage, Type and Display settings are saved. Then, whenever the unit has
been off and AC power is reapplied for 10 minutes and no buttons are pressed, charging of the battery will
resume with the saved settings from the last charging cycle.
DISPLAY
Following power-up, the display turns off after one minute or one minute from the last key press or connection
to a battery. With the display off, any button press (other than a display button press) will turn the display on
for one minute or one minute from any subsequent key press or clamp connection. Also, with the display off,
connecting the station cable clamps to a battery will show the battery voltage and keep the display on for one
minute or one minute from any subsequent key press. However, with the display off, if the display button turns
the display on, the display will remain on until power-down. If the display button turns the display off (see
Display Mode Button, in Section 10), then the above scenario, with the display off, once again applies.
CHARGING
When charging begins, the yellow/orange Charging LED will be lit.
COMPLETION OF CHARGING
Charge completion is indicated by the green Charged/Maintaining LED. When lit, the charger has
stopped charging and has switched to Maintain Mode of operation.
ABORTED CHARGE
If charging cannot be completed normally, charging will abort. When charging is aborted, the charger's output
is shut off.The display will show "BAD BAT" and an error code. See section 15, Troubleshooting and Error
Codes. To reset after an aborted charge, press the START/STOP button to turn the charger off.
RECOVERY MODE (Non-lithium ion batteries only)
If a battery is left discharged for an extended period of time, it could become sulfated and not accept a
normal charge. The charger will detect this and automatically enter Recovery mode. When this mode is
activated, the display will read "BAD BATT REC". The display will revert to normal operation when normal
charging begins after the battery is recovered. Recovery Mode could take up to 10 hours. If it fails, charging
will abort and the display will read "BAD BAT F02". For more information, see section 15, Troubleshooting
and Error Codes.
MAINTAIN MODE
When the green Charged/Maintaining LED is lit, the charger has started Maintain Mode. This mode of
operation is known as Float Mode Monitoring. In this mode, the charger keeps the battery fully charged
by delivering a small current, when necessary. The voltage is maintained at a level determined by the
battery type selected.
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