Quick Defrosting ("Warm Hold" Feature); Conditions Permitting The "Warm Hold" Function; Conditions Preventing The "Warm Hold" Function - Renault Premium DXi 11 Service Manual

Presentation
B2-58

Quick defrosting ("Warm hold" feature)

This device speeds up the defrosting function.
With the vehicle stationary, for an ambient temperature below 5°C and a coolant tempera-
ture below 70°C, after a time-delay that is variable according to ambient temperature and
engine temperature, a device holds the engine at the idling speed of that moment and actu-
ates the exhaust brake so as to quickly raise temperature of the engine cooling system.
This function is disabled when the cooling system temperature reaches 70°C, then reactivat-
ed as soon as the circuit temperature drops below 50°C.

Conditions permitting the "WARM HOLD" function

– ambient temperature below 5°C,
– coolant temperature below 70°C,
– road speed below 3 km/h,
– no PTOs active.

Conditions preventing the "Warm hold" function

– ambient temperature above 5°C,
– coolant temperature above 70°C,
– road speed above 3 km/h,
– action on the accelerator pedal,
– activation of a PTO,
– vehicle with OPTIDRIVER 2 gearbox, changeover from (N) (neutral) to (D).
If the parking brake is not applied, the "warm hold" function can only be activated after a
time-delay of 150 seconds.