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14.0 Troubleshooting EN
Fault Cause Repair
The engine fails to start Insufficient diesel supply Refill diesel tank.
Battery run down Recharge the battery*)
Fuse blown Exchange fuse. See section 3.0.
The pump is frozen Let the pump thaw.
Working pressure too high Nozzle partly blocked Clean the nozzle. See section 12.6.
Working pressure Valve for regulation of Open fully the valve for regulation of
too low water volume is not water.
adjusted to max pressure Turn counterclockwise.
Nozzle worn Replace nozzle.
Motor speed too low Contact ALTO service technician.
Irregular working Air in the pump Repeat the venting procedure.
pressure Inlet filter/filter blocked Clean the filter. See section 12.1.
Insufficient water supply Change to a water supply with greater
from the water works output. If this is not possible; turn the
valve for regulation of the water volume
clockwise, until the machine works smoothly.
In suction mode: Excessive suction head Read section on suction mode (8.4).
or excessively hot water
Nozzle partly blocked Clean nozzle. See section 12.6.
No working pressure Nozzle blocked Clean nozzle. See section 12.6.
No water Check the water connection.
Unloader (recycling valve) Allow the machine to thaw.
frozen See section 10.0.
High pressure hose/ Allow the high pressure hose/
spray lance frozen spray lance to thaw.
The burner does not Insufficient fuel supply Refuel.
ignite Fuel filter blocked Clean the filter. See section 12.4
Should faults occur other than those mentioned above, please contact the nearest ALTO service
organization *) IMPORTANT NOTE: To avoid damage to the electronic systems, the battery
connecting cables must be removed when recharging the battery.
15.0 Technical data EN
Model CONTRACTOR DIESEL
Pump pressure, max. bar/psi 180/2610
Water volume at min/max pressure l/min-USgpm 20,5/19 - 5.42/5
Max. temperature of inlet water °C/°F 35/95
Heating power kW/Kcal 115/98.200
Nozzle, spray angle degrees (05) 15/65
Self-priming, max. lift m/ft 5/16.5
Engine Ruggerini MD 151
Rated effect kW/hp 12/16.3
Start system Electric start
Battery V/Ah 12/50
Diesel consumption, max. pressure l/h-USgph 3.0-0.79
Fuel consumption at 60°C/140°F
1
) l/h-USgph 7.5-1.98
“Jerry-can”, capacity l/Usg 20/5
Sound power level (L
WA
) of the machine measured in accordance with ISO 3746: 112 dB(A).
Sound pressure level (L
PA
) measured in accordance with ISO 11202 [DISTANCE 1m] [FULL LOAD]: 100 dB(A).
1
) Delta t= 52°C/126°F
This machine has been manufactured in accordance with the EMC directive 89/336/EEC inclusive of subsequent
amendments.
Specifications are subject to alterations.