Hitachi UC 24YC Technical Data And Service Manual page 19

Charger
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(2) Trouble mode (B)
Red pilot lamp does not stay lit
(continues to flash) after battery
has been connected.
Are the connection terminals
of the charger or the battery dirty, deformed,
Check with tester
( S ) and (---) terminals 2 KΩ to 100 KΩ ?
or otherwise abnormal ?
NO
S, G, B, M and
H-type batteries: Is the
resistance between
EB 7, EB 9 and EB 12 batteries:
Is there continuity between (T)
and (---) terminals?
YES
Faulty internal circuits
Replace case (B) (PCB).
YES
NO
--- 17 ---
Remove dirt or
correct abnormality.
Replace the battery.

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