16
NEPTUNE PE/DE
Original Instructions
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 section 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 section 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 (NEPTUNE 5-46/
5-54 PE, see section 4.2)
>
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.
