Lainaus VIDAsta:
"The central electronic module (CEM) (4/56) receives information on desired departure time from the steering wheel module (SWM) (3/130) and driver information module (DIM).
Approximately 50 minutes before the desired departure time, the central electronic module (CEM) transmits information to the combustion preheater module (CPM) about:
outside temperature
quantity of fuel
the operating status of the vehicle
a request to calculate the start time of the heater.
The combustion preheater module (CPM) calculates start time based on information from the central electronic module (CEM) and starts the heater at the calculated time point. The heater calculates when to start (15-60 minutes before the planned departure at temperatures between -30 °C/-22 °F and +15 °C/59 °F).
The heater runs max. 60 minutes at temperatures below -10 °C/14 °F.
The heater runs a minimum of 15 minutes before the desired departure time. (Temperatures between +15 °C/59 °F and +25 °C/77 °F).
When the heater is started directly using the control stalk, it runs until it is shut off or for a maximum of 60 minutes. The coolant pump and blower fan remain activated for 2 minutes after the set departure time to allow for the driver getting to the car late. "
Periaatteessa kait maksimiaika tulee vasta -30 asteen pakkasessa, mutta tuo seuraava lause vähän kumoaa sen ja viittaa siihen, että kävisi maksimiajan -10 asteen alapuolella.
Pikkuvolvojen ohjeessa on, että ajastuksella käyntiin laitettu eberi pohisee 10 min ajastusajan yli ja samaten se taitaa näissä isoissa volvoissa olla, vaikka ei sitä suoraan tuossa kerrotakaan.
