Maintenance And Inspection - Hitachi UC 24YC Handling Instructions Manual

(3) Regarding recharging time
Table 3 shows the recharging time required according to the type of battery.
Table 3 Recharging time (approx. min.) at 20°C
Battery voltage
(V)
EB7
7.2 V
EB7S
EB9
9.6 V
EB9S
EB12
12 V
EB12S
14.4 V EB14S 13 min.
18 V
24 V
: Ni-MH batteries
NOTE: The recharging time may vary according to the ambient temperature and the power supply voltage.
4. Disconnect the charger's power cord from the
receptacle.
5. Hold the charger firmly and pull out the battery.
NOTE
Be sure to pull out the battery from the charger after use,
and then keep it.
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 is charged while it is heated because
it has been left for a long time in a location subject
to direct sunlight or because the battery has just
been used, the pilot lamp of the charger lights up
green. In such a case, first let the battery cool, then
start charging.
1.3 Ah 1.7 Ah
13 min. EB7G 17 min.
13 min. EB9G 17 min.
13 min. EB12G 17 min.
Battery capacity (Ah)
2.0 Ah 2.2 Ah
EB9B
20 min. EB9H 30 min. EB924 24 min. EB930H 36 min.
EB9M
EB12B
20 min. EB12H 30 min. EB1224 24 min. EB1230H 36 min.
EB12M
EB14B 20 min. EB14H 30 min. EB1424 24 min. EB1430H 36 min.
EB18B 30 min.
EB24B 30 min.
When the pilot lamp flickers in red (at 0.2-seconds
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 UC24YC 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.

MAINTENANCE AND INSPECTION

1. Inspecting the mounting screws:
Regularly inspect all mounting screws and ensure
that they are properly tightened. Should any of the
screws be loose, retighten them immediately. Failure
to do so could result in serious hazard.
2. Cleaning of the charger
When the charger is stained, wipe with a soft dry
cloth or a cloth moistened with soapy water. Do
not use chloric solvents, gasoline or paint thinner,
for they melt plastics.
3. Store idle charger
When not in use, the charger should be stored in
dry, high or locked-up place — out of reach of
children.
NOTE
Due to HITACHI's continuing program of research and
development, the specifications herein are subject to
change without prior notice.
English
2.4 Ah 3.0 Ah
EB2430H 60 min.
17