FNM HPE Series Owner's Manual page 79

2. Use a small clean container of about half a liter to collect diesel fuel in excess.
Don't smoke during the operations.
3. Unscrew the drain cap under the filter ad wait that fuel comes out. Close when you notice that
the fuel is clean and free of impurities or contamination of water.
Fuels such as waste oils are highly polluting. Respect the
environment and pay attention to the disposal of oil.
4. Replace the cover re-screwing it and replace the sensor connector.
In the low pressure circuit diesel fuel is kept under pressure by the electric pump. Be careful to
avoid the formation of air bubbles in this part of the circuit, otherwise you will have irregular
operation of the engine. To put the circuit under pressure after the drainage operations turn the
ignition key to position (I) and wait that the electric pump stops working, before turning on.
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FNM HPE Series
Figure 30 - Removing the water in fuel presence sensor
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