Bosch LW 30 E - Page 13

English 13
Charging of exhausted batteries and back-up mode
Charging current (constant): max. 1 to 30 A
arithm/rms
Cut-in voltage range:
Minimum battery voltage 0 V
Cut-in protection in the case of incorrect polarity
(reverse-polarity voltage >1 V)
No cut-in protection if the charging clips are opened or in
the event of short circuit.
Rated current consumption: 0.8 A
Rated power consumption: 70 VA
5 Preparations for testing
5.1 Test conditions
Mains voltage
(via isolating transformer) 230 V 10%
Mains frequency 50 Hz 15%
Ambient temperature 20 C + 5 C
5.2 Test equipment and measuring tools
Isolating transformer
U
prim
230 V
rms
U
sec
230 V
rms
P
min
800 W
E
sec
M4A (T4A)
Multimeter
(2 ea. required):
Measuring ranges:
V
~
0 – 300 V (Ri ≥1000 kΩ)
A
~
0 – 40 A
V = 0 – 20 V (Ri ≥1000 kΩ)
A = 0 – 40 A
R0 – ∞ Ω
Variable measuring shunt:
Range 0.4 Ω – 7.0 Ω
Load rating 500 W
Test battery:
Rated voltage 12 V
Rated capacity min. 66 Ah
Charge state approx. 20% of the rated capacity
6 Tests with charger closed
Please note Section 5 ”Preparations for
testing” before starting troubleshooting and
repair.
Then start at the test step determined in the test flowchart
below and continue with the other test steps as specified
in the relevant test flowcharts.
8.3
Set mains switch to ”0”
Direction
of fan rotation correct
(blows air out of the
unit)?
yes
no
8.2
Set mains switch to ”0”
7
8.7
Set mains switch to ”0”
7
7
Check and, if necessary,
exchange external mains,
external fuse, socket,
mains plug, supply lead,
device fuse.
Set mains switch to ”0”
Disconnect the mains plug
Connect charger to the
mains via the isolating
transformer
Set mains switch to ”I”
One
indicator lamp
lights
?
yes
no
Fan operating ?
yes
no
8.1
Set mains switch to ”0”
7
Connect charger to the
mains via the isolating
transformer
Set mains switch to ”I”
6
One
indicator lamp lights and
fan operating
?
no
yes
9
Disconnect the mains plug
Disconnect the mains plug
Disconnect the mains plug
Disconnect the mains plug