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Original instructions
NEPTUNE 4 FA
8.2 Other Faults
Fault Cause Remedy
not ON
> Plug not connected to the
electrical plug socket
Put the plug into the electrical
socket.
Check fuse (see chapter 9.4 Techni-
cal Data)
Pressure too low > High pressure nozzle worn
out
Replace nozzle
> Pressure regulation set to low
pressure or VarioPress-lance
1)
set to low water volume.
Turn the twist grip on safety control
block clockwise (+) or set VarioPress-
lance
1)
to higher water volume (see
chapter 4.4)
Machine is running with
pulsating pressure and
makes knocking noise
> Pump has drawn in air as the
detergent tank is 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 Top up 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 Alto Service
> Burner sooted or adjustment
incorrect
>
>
Flashing light (alternately)
- Motor overheated
- Machine overheated
>
>
Turn main switch in position
“OFF“, let the machine cool
down
• Remove/disconnect exten-
sion cable
Possible phase failure; have
electrical connection checked
Contact Nil sk-ALTO Service
slow
rapid
> Flashing light
- Flame sensor sooted
- Ignition or fuel system failure
>
>
Clean ame sensor (see chapter
7.2.5)
Contact Nil sk-ALTO Service
Cold water operation possible
19


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