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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
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 ashes
slowly
red LED ashes
rapidly
>
>
Flame sensor sooted
Ignition or fuel system failure
Clean ame sensor (see chapter
7.2.5).
Contact Alto Service
Cold water operation possible
19


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