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1)
Options / model variants
Original instruction
NEPTUNE 1, NEPTUNE 2
NEPTUNE 2 Special
8 Troubleshooting
8.1 Indications on Display
Indication lights Cause Remedy
>
>
The light is constant
- The appliance is ready for
operation
Flashing light
- Flow sensor fault
- Water tap closed or water
shortage
- Detergent tank empty
- Pressure regulation on the
safety control blocks or
the VarioPress
1)
lance is
set to low water volume
- Machine scaled
- Spray gun is leaking
- High pressure hose,
coupling or line system is
leaking
- Motor is overheated
3)
> Refuel detergent or set SDR
value to “0“
Turn main switch to position
“OFF“ - let the machine cool
down
Remove/disconnect exten-
sion cable
> Constant light
- Low fuel level
>
>
Top up fuel
Cold water operation is pos-
sible
> Flashing light
- Low Nilfi sk-ALTO Anti-
Stone level
1)
> Top up Nilfi sk-ALTO Anti-
Stone
>
>
Constant light
- Service interval has
expired
Flashing light
- Service interval due in 20
hours
- Microprocessor error
>
>
>
Contact Nilfi sk-ALTO Service
Contact Nilfi sk-ALTO Service
Machine shutdown
> Constant light
- Boiler overheated.
Exhaust sensor (EXT-H)
has cut off fuel supply
- Insuffi cient water fl ow
- Machine scaled
- Boiler not serviced
>
>
>
Machine shuts down. Cold
water operation is possible.
Check water supply
Contact Nilfi sk-ALTO Service
> Constant light
- Flame sensor (B7) is
sooted
- Ignition or fuel system
failure
>
>
>
Clean fl ame sensor (B7) (see
chapter 7.2.4)
Contact Nilfi sk-ALTO Service
Cold water operation is pos-
sible
3)
For NEPTUNE 1 only. For NEPTUNE 2 overheating warning see next page.