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Options / model variants
NEPTUNE 5 SB FA
Indication
on Display
Cause Remedy
FLF
FLF
> Flow sensor fault
Contact Nilfi sk-ALTO Service
Cold water operation possible
FLO
FLO
> Water supply turned off or inadequate supply
to machine
• Required volume fl ow and pressure see
chapter 9.4 Technical Data
> Detergent tank empty • Fill detergent tank or set detergent me-
tering to „OFF“
>
Pressure regulation on the safety control
block set to low water volume
• Turn the twist grip on safety control block
to higher water pressure/volume
> Machine scaled Contact Nilfi sk-ALTO Service
Fue
Fue
>
Fuel shortage • Fill fuel tank
Cold water operation possible
Hop
Hop
> Motor overheated • Turn main switch in position „OFF“, let
machine cool down
• Remove extension cord, if being used.
• Possible phase failure; have electrical
connections checked
HOS
HOS
> Machine overheated Contact Nilfi sk-ALTO Service
LEA
LEA
> Leakage or inadmissible operating condition
by short-time operation
• After three times of short-time ope ration
the machine switches off. To reset: Turn
main switch to position “OFF“, then start
again. Keep trigger squeezed for longer
than 3 seconds. If a leak occurs in the
hose and gun and causes the machine
to start and stop briefl y 3 times, then the
machine will switch off.
> Spray gun leaking • Repair Spray gun
> High pressure hose, coupling or line system
leaking
• Replace high-pressure hose, retighten
screw fi ttings
> Detergent tank empty • Fill detergent tank or set detergent me-
tering to „OFF“
> Water inlet fi lter dirty • Clean fi lter (see chapter 7.2.1)
> High-pressure pump drawing in air • Repair leaks
LHE
LHE
> Flame sensor sooted • Clean flame sensor (see chapter
7.2.6).
> Ignition or fuel system failure
Contact Nilfi sk-ALTO Service
Cold water operation possible
LHL
LHL
> Burner failure
Contact Nilfi sk-ALTO Service
Cold water operation possible
POL
POL
> Pump oil low
• Fill to proper level (see chapter 7.2.3)
SEC
SEC
> Temperature sensor damaged
Contact Nilfi sk-ALTO Service
Cold water operation possible
SEO
SEO
> Temperature sensor damaged
Contact Nilfi sk-ALTO Service
Cold water operation possible
UPC
UPC
> Microprocessor failure Contact Nilfi sk-ALTO Service
8 Troubleshooting
8.1 Indications on Display