Hitachi UC 18YML2 Technical Data And Service Manual page 7

4-1-5. Easy-to-read visual display of charging status through constant lighting or flashing
of red and green pilot lamp
Before
charging
During
Charge
charging
status lamp
Charging
(Red)
completed
Charging
impossible
Overheat
Overheat
lamp
standby
(Green)
DC charge
Charging
status lamp
impossible
(Green)
NOTE: When in standby for cooling a battery, the UC 18YML2 cools the overheated
battery by cooling fan. (During DC charging, the cooling fan does not rotate.)
• Rechargeable battery temperature range
The table below shows the rechargeable battery temperature range. Overheated batteries should be
cooled to the specified temperature before recharging.
Rechargeable battery temperature range
Indications of the pilot lamp
0.5 sec. ON 0.5 sec. OFF
Blinks
(Red)
Stays ON continuously
Lights
(Red)
0.5 sec. ON
Blinks
(Red)
0.1 sec. ON
Flickers
(Red)
Stays ON continuously
Lights
(Green)
0.5 sec. ON
Blinks
(Green)
32°F to 122°F (0°C to 50°C)
0.5 sec. OFF
0.1 sec. OFF
0.5 sec. OFF
-5-
Battery or charger is
faulty.
Battery is overheated.
Unable to charge.
(Charging will
commence when the
battery is cooled.)
DC 12 V supply is
faulty.