16

NEPTUNE PE
8 Troubleshooting

8.1 Indications on Display

Indication light Cause Remedy

Green LED
ON
> Appliance ready for operation.
When switching on, all the LEDs
light up once.
Yellow LED
ON
>
Fuel shortage • Top up with fuel
Cold water operation possible
Red LED flashing > Service interval: Service due in
20 hours Contact Nilfisk-Alto Service
Red LED ON > Service interval expired Contact Nilfisk-Alto Service
Red LED ON >
>Pump oil low
Engine oil low •
•Top up with pump oil
Top up with engine oil
Green LED
flashing > Flow sensor failure Contact Nilfisk-Alto Service
Cold water operation possible
> Water tap closed or water
shortage • Required volume flow and pres-
sure see chapter 9.4 Technical
Specifications
> Machine scaled Contact Nilfisk-Alto Service
Green LED and red LED
flash simultaneously
> Leakage or inadmissible opera-
ting condition by short-time
operation
• After three times of short-time
ope ration the heating switches
off. Reset: Turn main switch to
position “OFF“, then start again.
Keep spray gun pressed for lon-
ger than 3 seconds. If a leak oc-
curs causing the machine to start
and stop briefly 3 times, then the
heating will switch off.
> Spray handle leaking •Check spray handle
> High pressure hose, coupling or
line system leaking • Replace high-pressure hose,
retighten screw fittings
> Water inlet filter dirty •Clean filter (see chapter 7.2.1)
>High-pressure pump drawing in
air •Repair leaks
Cold water operation possible
Red LED
ON
>Charging rate too low •Engine has not started
•Generator defective
Contact Nilfisk-Alto Service
Red LED ON
>Pump overheated •Let pump cool down, avoid long
by-pass time
>Engine cooling water overheated
(Mitsubishi) •Check water level in radiator

Green LED and red

LED flash alternately

>Overheating failure Contact Nilfisk-Alto Service.
Operation with cold water pos-
sible.