FRANCO NEBBIA Serie Manual página 46

DEFECT
The machine does not start Blown fuse
Power
insufficient
Remote control switch lever set to
OFF
Remote control switch lever set to
<Automatic>
Thermal relay tripped
Electrical
(external circuit breaker)
Motor does not start but Phase failure
makes noise
Insufficient power supply
The machine stops after an Insufficient
initial start-up pressure can be detected on a
pressure
downstream of the filter unit).
Phase failure
Outlet water pressure too low. (the
pressure can be detected on a
pressure gauge built into the
pump).
Nozzle malfunction Presence of minerals or scale
inside the nozzles
Air in the network of nozzles
End-of-line nozzle Nozzle plugged
malfunction
Nozzle always open
L-LC191.01.FN
POSSIBLE CAUSES
Check and, if necessary, replace the fuse
supply interrupted or Connect the machine to the power supply
Check that the characteristics of the line match those required by the machine (voltage, number
of phases, operating frequency).
Replace the power cable (use cables with a Ø of not less than 2.5 mm)
Set the remote control switch lever to <Manual>.
Set the remote control switch lever to <Manual>.
Press the <Reset> key on the machine's electrical panel and keep it pressed for over 5 seconds. If
the thermal relay trips frequently, check the operating pressure, nozzle function and dimension of
the electrical cable. If necessary, contact a service centre.
protection tripped Contact a service centre
In the case of three-phase models, check that three electrical phases are present
Check that the characteristics of the line match those required by the machine (voltage, number
of phases, operating frequency).
Replace the power cable (use cables with a Ø of not less than 2.5 mm)
water flow. (the Check opening of the water inlet valve
Check that the filters are clean
gauge located
Depending on the model used, check that the water inflow is sufficient for operation. See table for
the water mains given in section 6.3.2
Check that the suction/delivery valves are clean (see section 8.5). Unscrew valve caps, withdraw
and clean them. If possible, have this task performed by a service centre.
In the case of three-phase models, check that three electrical phases are present.
There are many possible causes. A complete list can be found in this paragraph as a dedicated
item.
This is typical when the water is very hard or when the system is started up again after a long down
time. Water inside the system evaporates leaving a sediment that jeopardises proper nozzle
operation. To prevent/reduce the problem, we recommend installing an HP valve at each end of
the line. The first time the system is turned on, unscrew the valves so that any water remaining in
the system and any mineral/scale deposits that could plug the nozzles can be eliminated. If the
nozzles are already plugged, dismantle them completely and soak them in an acid solution (e.g.:
water + vinegar) for about 24 hours. Then, blow out the nozzles with compressed air.
A network of nozzles should have many branches, each terminating with an end-of-line valve. Loop-
type nozzle networks (without an end of the line) are not recommended). In branches with an end-
of-line valve, any air that may be present inside a branch should reach the corresponding end-of-
line valve and be automatically vented from there. If the problem persists, open the end-of-line
valves and run the machine for a few seconds.
This is typical when the water is very hard or when the system is started up again after a long down
time. Water inside the system evaporates leaving a sediment that jeopardises proper nozzle
operation. If the nozzles are plugged, dismantle them completely and soak them in an acid solution
(e.g.: water + vinegar) for about 24 hours. Then, blow out the nozzles with compressed air.
Check that the water pressure in the high-pressure line is below 100 bar. Higher pressures could
damage nozzles with automatic operation.
EN
REMEDY
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