18 1) Options / model variants
Original instructions
NEPTUNE 5 FA
8.2 Indication lights on control panel8.3 Other Faults
Indication light Cause Remedy
fl ashing >see FLO •see FLO
ON > Low fuel level • Fill fuel tank
Cold water operation possible
> Low Nilfi sk-ALTO AntiStone
(Anti-Scale) level
• Fill Nilfi sk-ALTO AntiStone (Anti-
Scale) tank
fl ashing > Service interval: Service due
in 20 hours
Contact Nilfi sk-ALTO Service
ON > Service inter val expired Contact Nilfi sk-ALTO Service
ON > Pump oil low • Fill to proper level
Fault Cause Remedy
not ON > Power cord not properly
connected to power supply
• Check power cord connetction
• Check fuse (see chapter 9.4 Technical
Data)
Pressure too low > High pressure nozzle worn
out
• Replace nozzle
>Pressure regulation set to low
pressure
•Turn the twist grip on safety control
block clockwise (+)
Machine is running with
pulsating pressure and
makes knocking noise
> Pump has drawn in air due to
detergent tank being empty
• Close detergent valve. Remove lance
from gun. Operate spray gun and let
machine run until air in pump is gone
and the machine is running normally/
calm again.
No detergents drawn in > Detergent tank empty • Fill detergent tank
> Dirt in detergent tank • Clean detergent tank
> Suction valve at cleaning
agent inlet soiled
• Remove suction valve and clean or
replace
Burner soots > fuel contamination Contact Nilfi sk-ALTO Service
> Burner sooted or adjustment
incorrect