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1)
Options / model variants
Original instruction
NEPTUNE 5 / 7 / 8
Indication
on Display
Cause Remedy
FLF
> Flow sensor fault
Contact Nilfi sk-Alto Service
Cold water operation possible
FLO
> Water supply turned off or inadequate supply
to machine
Required volume fl ow and pressure see
chapter 9.3 Technical Data
> Detergent tank empty Fill detergent tank or set detergent me-
tering to „OFF“
> Pressure regulation on the safety control
block or VarioPress-lance
1)
set to low water
volume
Turn the twist grip on safety control block
or VarioPress-lance
1)
to higher water/
pressure volume (see chapter 4.4)
> Machine scaled
Contact Nilfi sk-Alto Service
Fue
>
Fuel shortage Fill fuel tank
Cold water operation possible
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
> Machine overheated Contact Nilfi sk-Alto Service
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
> 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
> Burner failure
Contact Nilfi sk-Alto Service
Cold water operation possible
POL
> Pump oil low
Fill to proper level (see chapter 7.2.3)
SEC
> Temperature sensor damaged
Contact Nilfi sk-Alto Service
Cold water operation possible
SEO
> Temperature sensor damaged
Contact Nilfi sk-Alto Service
Cold water operation possible
UPC
> Microprocessor failure Contact Nilfi sk-Alto Service
8 Troubleshooting
8.1 Indications on Display
19


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