Control panel – Panasonic EY4550 User Manual
Page 12
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Control Panel
(1)
(3)
(2)
(1) LED light
Before the use of LED 
light, always pull the 
power switch once. 
Press 
the LED
light button. 
The light illuminates 
with very low current, 
and it does not 
adversely affect the 
performance of the 
driver during use or 
its battery capacity. 
CAUTION:
• The built-in LED light is designed to
illuminate the small work area
temporarily.
• Do not use it as a substitute for a
regular flashlight, since it does not
have enough brightness.
• LED light turns off when the tool has
not been used for 5 minutes.
Caution : DO NOT STARE INTO BEAM.
Use of controls or adjustments or performance 
of procedures other than those specified 
herein may result in hazardous radiation 
exposure. 
(2) Overheat warning lamp
The overheating protection feature
halts operation to protect the battery
pack in the event of overheating. The
overheat warning lamp on the control
panel flashes when this feature is
active.
• If the overheating protection feature
activates, allow the driver to cool
thoroughly (at least 30 minutes). The
battery is ready for use when the
overheat warning lamp goes out.
• Avoid using the driver in a way that
causes the overheating protection
feature to activate repeatedly.
(3) Battery low warning lamp
Excessive (complete) discharging of
lithium ion batteries shortens their
service life dramatically. The tool
includes a battery protection feature
designed to prevent excessive dis-
charging of the battery pack. 
• 
The battery protection feature
activates immediately before the
battery loses its charge, causing the
battery low warning lamp to flash.
• If you notice the battery low warning
lamp flashing, charge the battery
pack immediately.
Off 
(normal 
operation) 
Flashing: Overheat 
Indicates operation has 
been halted due to 
battery overheating. 
Off 
(normal 
operation) 
Flashing 
(No charge) 
Battery protection 
feature active