Nilfisk-ALTO NEPTUNE 5 FA, Service Manual

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D
25
Function
NEPTUNE 5 FA_EN_Ver.2.0_25/11
If the machine and the power supply are working correctly the following will happend during start up.
Display
Pressure
Detergent valve A-B
Status indicators
Temperature setting
Start—hot
Start—cold
Depending on the electronic set-up the following will happen.
When the start switch is turned into cold water mode the display will show the running hours the ma-
chine has been used in cold and hot mode (but it doesn’t count ‘standby time’).
7 second later the motor will start building up pressure to cut off pressure and then by-pass.
20 second later the motor stops, the display shows the set point of the temperature in degC or degF.
The indicator lights up the green light on the plug icon only. The manometer shows by-pass pressu-
re.
Now the machine is on stand-by in cold water mode.
By switching to hot water mode the machine is then in stand-by in hot water mode.
When the spray handle is activated, flow will activate the flow switch and start the motor pump unit.
At the same time anti scale pump starts up and the fan for the burner starts ventilating the com-
bustion chamber for 3 sec. before the fuel is pumped into the boiler and the combustion takes place.
The temperature will now raise until the setpoint, has been reached. The combustion will stop, but
the water temperature will climb a little higher before it gets down to the setpoint. In the meantime
the fan and the ignition are still working. When the combustion starts at the setpoint, the temperatu-
re will go a little lower before it starts rising.
The detergent valve makes it possible to choose between detergent A from the built in tank or deter-
gent B from the canister. With the valve in off position as shown, it draws in water from the tank to
clean the channels.
Connected to water tank
B A
Suction from pump
Detergent A/B
Fig.D.1: Display