Hitachi WR 12DM Prior to Operation, Regarding electric discharge in case of new batteries, etc

English

Table 5

Indications of the lamps

Before charging

While charging

Charging complete

Charging impossible

Charging impossible

Blinks	Lights for 0.5 seconds. Does not light for
(RED)	0.5 seconds. (off for 0.5 seconds)
Lights
	Lights continuously
(RED)
Blinks	Lights for 0.5 seconds. Does not light for
(RED)	0.5 seconds. (off for 0.5 seconds)
Flickers	Lights for 0.1 seconds. Does not light for
(RED)	0.1 seconds. (off for 0.1 seconds)
Lights
	Lights continuously
(GREEN)

Malfunction in the battery or the charger

The battery temperature is high, making recharg- ing impossible.

(2)Regarding the temperatures of the rechargeable battery.

The temperatures for rechargeable batteries are as shown in the table below, and batteries that have become hot should be cooled for a while before being recharged.

Table 6 Recharging ranges of batteries

	Temperatures at
Rechargeable batteries	which the battery
	can be recharged
EB9B, EB1220BL	–5°C –	60°C
EB930H, EB1230HL	0°C –	45°C

(3)Regarding recharging time

Depending on the combination of the charger and batteries, the charging time will become as shown in Table 7.

Table 7 Charging time (At 20°C)

Charger

Battery	UC14YF2
EB9B, EB1220BL	Approx.	60	min.
EB930H, EB1230HL	Approx.	90	min.

NOTE

The charging time may vary according to temperature and power source voltage.

4.Disconnect the charger’s power cord from the receptaele.

5.Hold the charger firmly and pull out the battery.

NOTE

After charging, pull out batteries from the charger first, and then keep the batteries properly.

Regarding electric discharge in case of new batteries, etc.

As the internal chemical substance of new batteries and batteries that have not been used for an extended period is not activated, the electric

discharge might be low when using them the first and second time. This is a temporary phenomenon, and normal time required for recharging will be restored by recharging the batteries 2 – 3 times.

How to make the batteries perform longer.

(1)Recharge the batteries before they become completely exhausted.

When you feel that the power of the tool becomes weaker, stop using the tool and recharge its battery. If you continue to use the tool and exhaust the electric current, the battery may be damaged and its life will become shorter.

(2)Avoid recharging at high temperatures.

A rechargeable battery will be hot immediately after use. If such a battery is recharged immediately after use, its internal chemical substance will deteriorate, and the battery life will be shortened. Leave the

battery and recharge it after it has cooled for a while.

CAUTION

◯If the battery has been heated right after operation (or due to sunlight, etc.), the charger’s pilot lamp may not light in red. In such a case, first let the battery cool, then start charging.

◯When the pilot lamp flickers in red quickly (at 0.2- second intervals), check for and take out any foreign objects in the charger’s battery installation hole. If there are no foreign objects, it is probable that the battery or charger is malfunctioning. Take it to your Authorized Service Center.

◯Since the built-in micro computer takes about 3 seconds to confirm that the battery being charged with UC14YF2 is taken out, wait for a minimum of 3 seconds before reinserting it to continue charging. If the battery is reinserted within 3 seconds, the battery may not be properly charged.

PRIOR TO OPERATION

1.Preparing and checking the work environment Make sure that the work site meets all the conditions laid forth in the precautions.

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