Troubleshooting Chart - Electrical System; Troubleshooting At The Battery - Hatz Diesel 1D30 S Workshop Manual

Troubleshooting chart - electrical system

Troubleshooting at the battery

Malfunction Indication
Even shortly after
Battery is
charging, the ter-
not being
minal voltage drops
charged suf-
rapidly to 7 V on
ficiently or at
systems with 12 V
all, or is
nominal voltage.
being dis-
charged too
rapidly.
Terminal voltage
Battery is
permanently above
overcharged.
16.5 V at 12 V nom-
inal voltage, acid
density above
1.285 kg/l,
battery acid boils.
Acid emerging at
cell plugs.
4
1D . . / 03.06
Possible cause
Poor connections, open
circuit or contact resist-
ance in charging circuit,
short-circuit in line.
Battery defective (inter-
nal short circuits).
Battery capacity has
dropped severely due to
severe discharge for a
lengthy period (grey-
white coating on plates
("sulphatising").
Charging rate too low
(especially in winter).
Battery capacity too
large.
Defective voltage regula-
tor (e.g. overheated/over-
loaded).
Charge voltage too high.
Battery capacity is too
low.
Defective voltage regula-
tor.
Acid level too high.
Remedial action
Eliminate open circuit,
clean posts and clips,
tighten loose terminals.
Renew the battery.
Recharge battery at low
current (app. 1/40 of
nominal capacity in
Amps) for about 50
hours. (Only possible if
suplhatising not yet too
far advanced.) Other-
wise: renew battery.
Recharge the battery.
Install a smaller battery.
Renew the voltage regu-
lator.
Check voltage regulator,
renew if necessary.
Install a larger-capacity
battery. As a temporary
measure, discharge the
battery at intervals, e.g.
by switching on con-
sumers without running
the engine.
Check voltage regulator,
renew if defective.
Draw off excess acid
with hygrometer.