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Operating Instructions Booster WA 121545
8.4.4
Mains recharging
Charge current display
from suitable panel
22
All manuals and user guides at all-guides.com
Setting the "Bypass" switch
The "Bypass" sliding switch enables and disables a connection between the
starter battery input and the EBL / leisure area battery output on the booster.
This connection is established internally and has a limited current.
Y
When this switch is in the "On" position, there a connection between the
starter battery and the booster output (to which about 5 A can be applied) as
soon as the engine is turned off (so the D+ signal is no longer being ap-
plied).
This connection provides mains recharging of the starter battery when
F
the vehicle engine is switched off and a 230 V mains supply is availa-
ble (made available to its starter battery connector from an EBL with
STDBUS for example with bypassing of the cut-off relay).
Measuring the starter battery voltage when the vehicle engine is tur-
F
ned off and the bypass is established is also possible using the elec-
troblock to assess its condition.
"Bypass"
switch
Fig. 13
"Bypass" sliding switch
Only move the "Bypass" sliding switch to the "On" position in the following
cases:
Use of the WA 121545 booster together with an electroblock (EBL ...)
F
in a SCHAUDT SDTBUS system
For third party systems in which the battery is isolated by a cut-off re-
F
lay, and the requirement is to measure the starter battery voltage
when the engine is stationary
ATTENTION!
Y
When the booster output is connected directly to a leisure area battery and
starter battery, the "Bypass" switch must be in the "Off" position.
If it is erroneously in the "On" position, the two batteries are connected to
each other on "Engine off". This would cause undesired charge equalisation
between the two batteries (a discharged leisure area battery would di-
scharge the starter battery for example).
Date: 21.09.2017
8200510 BA / EN
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