Hitachi uc 24yj Technical Data And Service Manual page 30

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(2) Trouble mode (B)
The charge time lamp does not light red or
orange or green continuously or does not flash
red when a battery is inserted.
The charge status lamp flashes rapidly
(in 0.2-second intervals) when a battery is
inserted.
EB 14B, EB 14H, EB 1430H, EB 1820, EB 18B,
Are the connection terminals
of the charger or the battery
dirty or deformed?
NO
Is the resistance between
(S) and (-) terminals 2 to 100 KΩ?
Is there continuity between (T) and (-)
terminals of Ni-Cd battery
without thermistor?
YES
Is the battery hot immediately
after use (when charging batteries EB 14S,
EB 18H, EB 1830H, EB 24B
and EB 2430H)?
NO
Faulty internal circuit
Replace case (B) ass'y.
YES
Clean or correct deformation.
NO
Replace the battery.
YES
Thermal protector
is activated.
Allow battery to cool
prior to charging.
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