Bosch LW 30 E Manual Del Usario página 18

18
8.8 Testing the shunt
8.8
Disconnect the mains plug
Detach the option board
from the housing cover
and remove it from the unit
Connect the battery clips
to test circuit A in
accordance with the
adjacent circuit diagram
Set the test resistor R to
L
max. resistance
Connect the charger to the
mains via the isolating
transformer
Set mains switch to "I"
Reduce the resistance of
the test resistor R until I
L L
= 30 A
Voltage
drop at shunt
approx. 60 mV
no
?
yes
Set mains switch to "0"
Disconnect the mains plug
Disconnect the battery
Plug in the option board
and screw it tight
8.9
English
Test circuit A
I
L
+
A=
+
R
V=
L
B
–
Set mains switch to "0"
Disconnect the mains plug
Disconnect the battery
Test attachment and
condition of the shunt and
the shunt leads and, if
necessary, exchange them
Plug in the option board
and screw it tight
9
8.9 Testing the regulating circuit
8.9
Disconnect the mains plug
U
B
Connect the battery clips
to test circuit A in
accordance with the
adjacent circuit diagram
Set the resistance of the
test resistor R to
L
approx. 0.5Ω
Connect the charger to the
mains via the isolating
transformer
Set mains switch to "I"
Vary the charging current
with the rotary control on
the option board
I can be
L
varied steplessly
?
yes
U constant ?
B
yes
Set mains switch to "0"
Disconnect the mains plug
Disconnect the battery
9
Test circuit A
I L
+ A=
+
R
V=
L
B
–
no
no
Set mains switch to "0"
Disconnect the mains plug
Disconnect the battery
Discharge capacitor C1
Exchange the regulator
board
U
B