Bosch LW 30 E - Page 18

English18
8.8 Testing the shunt
8.8
Connect the battery clips
to test circuit A in
accordance with the
adjacent circuit diagram
Set the test resistor R
L
to
max. resistance
Connect the charger to the
mains via the isolating
transformer
Reduce the resistance of
the test resistor R
L
until I
L
= 30 A
9
Disconnect the battery
Test attachment and
condition of the shunt and
the shunt leads and, if
necessary, exchange them
V=
I
L
A=
R
L
B
U
B
+
Test circuit A
+
–
Voltage
drop at shunt
approx. 60 mV
?
no
yes
Disconnect the battery
8.9
Set mains switch to ”I”
Detach the option board
from the housing cover
and remove it from the unit
Set mains switch to ”0”Set mains switch to ”0”
Plug in the option board
and screw it tight
Plug in the option board
and screw it tight
Disconnect the mains plug
Disconnect the mains plug Disconnect the mains plug
8.9 Testing the regulating circuit
8.9
Connect the battery clips
to test circuit A in
accordance with the
adjacent circuit diagram
Set the resistance of the
test resistor R
L
to
approx. 0.5Ω
Connect the charger to the
mains via the isolating
transformer
Vary the charging current
with the rotary control on
the option board
Disconnect the battery
V=
I
L
A=
R
L
B
U
B
+
Test circuit A
+
–
I
L
can be
varied steplessly
?
no
yes
Disconnect the battery
9
Set mains switch to ”I”
Set mains switch to ”0”Set mains switch to ”0”
U
B
constant ?
no
yes
Exchange the regulator
board
Discharge capacitor C1
Disconnect the mains plug
Disconnect the mains plug Disconnect the mains plug