Schumacher 9275A-PE owner manual Battery Charger Controls, DC Amps

BATTERY CHARGER CONTROLS

This battery charger offers two 12-volt charge rates, 2 and 12 amps. The 2-amp rate is recommended for charging small batteries such as those found in motorcycles and riding lawn mowers whereas the 12-amp rate is for larger automotive and marine batteries.

Manual Mode: You have a choice of charging in the automatic or manual mode of operation. The Manual mode is required for batteries that have been run down to the point where the battery voltage is less than 1 volt. (The Automatic mode will not respond to a battery with less than 1 volt.) Once a battery begins to take on a charge, it is recommended to switch to the automatic mode.

Automatic Mode: The Automatic mode should be used for all other conditions. The charger starts out with the default setting of 2 amps in automatic. You may change the mode of operation anytime after the initial start up. In the Automatic mode, during the first few seconds the charger will perform an analytical check of the battery. During this time, the charger will turn on, off, and on again as indicated on the amp meter. The information gained from this test determines what action the charger will take.

Touch-Pad Function Switch Indicators: When a touch-pad function switch is pressed the LED next to it will glow orange indicating that its function has been selected. You may, at any time, change the setting from the initial default setting of 2 amps while in Automatic mode. During the analytical period, the LEDs will glow steady. At the end of this period, either the Manual or Automatic LED will blink indicating that the charge cycle has begun.

AUTOMATIC MANUAL

2 AMP12 AMP

CHARGE

COMPLETE

Charge Complete Indicator: Near the end of the charge cycle, the green Charge Compete LED will begin to blink. At the end of one hour when Charge Complete has been reached, the green indicator will glow steady and the orange function LEDs will turn off. At this point, the charger switches into float-mode monitoring and maintains the battery at its full charge state. Note the Charge Complete indicator does not function in the Manual mode. Use the Amp Meter to determine the state of charge. When using the Manual mode, the charging must be frequently monitored.

Selector Switch: When the switch is set to the Engine Start position, the Automatic and Manual switch LEDs will alternately glow once every half second to indicate that the Engine Start mode has been selected.

	SELECT
ENGINE		CHARGE
START

Ammeter: The meter indicates the amount of current flowing from the charger into the battery. It is not uncom- mon for a discharged battery to draw more than the 12- amp rating of the charger. When this occurs, the needle will move to the far right past the 12-amp mark. This effect may last up to an hour depending upon the size and condition of the battery. Additionally, the meter shows percentage of charge indicating how close the battery is to full charge. When using the 2-amp setting, there will be little or no needle movement on the meter. Refer to the LED indicator for the battery’s status.

	DC AMPS
	2 AMP RATE
CHARGE %			100	75	50	25
0	2	4	6	8	10	12

Engine Starting: With the charger properly connected following “Charging Your Battery in a Vehicle”:

1.Set the selector switch to the Engine Start position.

2.Crank the engine - The charger is programmed to crank at 75-amps for 5 seconds and then will go into a 4-minute rest.

If the engine does not start on your first attempt, wait the

4 minutes and then try again. Or, you may switch back to the 12-amp charge during the rest period by changing the switch position to Charge and the 12-amp rate setting.

3.After the 4-minute wait, you can crank another time. Repeat again if necessary. Remember to set the switch back to Engine Start before cranking if you had switched back to Charge at 12-amps. DO NOT crank in the 12-amp charge position.

Battery Abort: While in the Automatic mode only, if a battery fails to meet the criteria of a good battery it will abort charging. When this happens, all four of the orange function switch LEDs will began flashing.

Sulfated Battery: If a battery exhibits characteristics of a sulfated battery, the charger will respond by operating in a mode of operation designed specifically for this condition. If the charger fails to recover the battery within ten hours it will switch to the Battery Abort mode.

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