19
1)
Options / model variants
Original instructions
NEPTUNE 3
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 9.3 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 Vario-
Press-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
Indication light Cause Remedy
Green LED and red
LED
fl ash alternately
> Motor overheated • Turn main switch in position
„OFF“, let machine cool down
• Remove/disconnect extension
cable
• Possible phase failure; have elec-
trical connection checked
> Machine overheated
Contact Alto Service
Green LED fl ashes
slowly
red LED fl ashes
rapidly
>
>
Flame sensor sooted
Ignition or fuel system failure
• Clean fl ame sensor (see chapter
7.2.5).
Contact Alto Service
Cold water operation possible
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