Fiat 2013 Ducato 250, Owner'S Handbook Manual

Page: 65 / 331

❒
a control unit connected to the passenger
compartment heating/ventilation system to allow
automatic operation;
❒
an electronic control unit for controlling and
adjusting the built-in burner;
❒
a digital timer A fig. 56 for turning the heater on
manually or for programming the time that it
comes on.
The additional heater (during winter) heats,
maintains the temperature of and circulates engine
coolant for a set time period in order to ensure
optimum engine and passenger compartment
conditions at engine start-up.
The heater can operate automatically when
programmed with a digital timer or manually by
pressing the “immediate heating” button on the
timer.
After heater activation, either programmed or
manual, the electronic control unit operates the
liquid circulation pump and ignites the burner in
accordance with the preset, controlled procedures.
The circulation pump output is also controlled by the
electronic control unit in order to minimise the
initial heating time.
When the system operates, the control unit turns on
the passenger compartment heater unit fan at the
second speed.
The thermal power of the boiler is regulated
automatically by the electronic control unit
depending on the temperature of the engine coolant.
IMPORTANT The heater is equipped with a thermal
limiter that cuts off combustion in the case of
overheating due to insufficient coolant/coolant leaks.
In this case, after repairing the fault in the cooling
system and/or topping up the fluid, press the
program selection button before turning the heater
back on.
The heater can turn off spontaneously due to
misfiring after start-up or because the flame goes out
during operation. In this case, carry out the turning
off procedure and try to turn the heater back on. If it
still does not work, consult a Fiat Dealership.
Activation of the heating system
When an automatic climate control system is
present, the control unit sets the air temperature
and distribution when the heater is turned on from
the park position. When a manual heater/climate
control is present, to obtain maximum heater
efficiency, check that the passenger compartment
heating/ventilation temperature adjustment knob is in
the 'hot air' position.
To prioritise passenger compartment pre-heating, set
the air distribution knob to the
position.
To prioritise windscreen defrosting, set the air
distribution knob to the
position.
To obtain both functions, set the air distribution
knob to the
position.
61
KNOW YOUR
VEHICLE
SAFETY
STARTING AND
DRIVING
WARNING LIGHTS
AND MESSAGES
IN AN EMERGENCY
SERVICING AND
MAINTENANCE
TECHNICAL
SPECIFICATIONS
INDEX