Manual Panasonic EY78A1 (page 13 of 148) (English, German, Dutch, Danish, French, Italian, Swedish, Spanish, Norwegian, Finnish)

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(3) Battery low warning lamp

Excessive (complete) discharging of

lithium ion batteries shortens their

service life dramatically. The driver

includes a battery protection feature

designed to prevent excessive dis-

charging of the battery pack.

• The battery protection feature ac-

tivates immediately before the

battery loses its charge, causing

the battery low warning lamp to

flash.

• If you notice the battery low warn-

ing lamp flashing, charge the bat-

tery pack immediately.

•

If it is started with too little battery

power remaining, the tool may stop

operating without the battery low

warning lamp flashing first. This

indicates that there is too little bat-

tery power remaining to use the

tool, and the battery pack should

be charged before further use.

• If the tool is subject to a sudden

load during use that causes the

motor to lock up, the overdischarge

prevention sensor may be trig-

gered, and the battery low warning

lamp may flash. The lamp will stop

flashing once you address the

cause of the motor’s locking up and

cycle the trigger.

•

The battery protection feature may

activate when a high load is ab-

ruptly placed on the motor, even if

ample battery charge remains. In

this case, both the battery low

warning lamp and LED light will

flash.

(EY78A1)

Off

(normal

operation)

Flashing

(No charge)

Battery protection

feature active

illuminates or ﬂashes when this

feature is active.

●

If the overheating protection

feature activates, allow the

tool to cool thoroughly (at

least 30 minutes). The tool is

ready for use when the overheat

warning lamp goes out.

●

Avoid using the tool in a way that

causes the overheating protec-

tion feature to activate repeatedly.

●

If the tool is operated continuously

under high-load conditions or if it is

used in hot-temperature conditions

(such as during summer), the

overheating protection feature may

activate frequently.

●

If the tool is used in cold-

temperature conditions (such as

during winter) or if it is frequently

stopped during use, the overheat-

ing protection feature may not

activate.

●

The performance of the EY9L42

deteriorates significantly at and

below 10°C due to work conditions

and other factors.

●

The ambient temperature range is

between 0°C (32°F) and 40°C

(104°F). If the battery pack is used

when the battery temperature is

below 0°C (32°F), the tool may fail

to function properly.

●

Use the charger at temperatures

between 0°C and 40°C, and

charge the battery at a tempera-

ture similar to that of the battery

itself. (There should be no more

than a 15°C difference between

the temperatures of the battery

and the charging location.)

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Panasonic EY78A1 Manual

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