Volkswagen Marine TDI 100-5 User Manual page 49

Functional description
Water level safe
The engine control unit sends a voltage to the
contact pins of the warning switch located in the
fuel microfilter. Only a low current flows if the
contact pins are surrounded by diesel fuel.
Water level dangerous
If the water level rises up to the contact pins,
a higher current flows due to the better
conductivity of the water. The engine control unit
detects the higher current flow and by way of the
indicator lamp in the control panel signals the
high water level to the skipper.
Drain fuel microfilter
A drainage facility is located on the underside of
the fuel microfilter.
Please refer to the Owner's
Handbook or the current Workshop
Manual for the exact description of
the water drainage procedure.
Water drain valve
Superior 49 Technology
Fuel system
Filter
Contact pins
Diesel fuel
Water
MSSP_001_041
MSSP_001_042
MSSP_001_043