Volvo S80 Owner's Manual page 64

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Setting TIMER 1 and 2
For reasons of safety, you can only programme
times for the following 24 hours, not several
days in a row.
After setting TIMER 1, toggle to TIMER 2.
Settings are made the same way as for TIMER 1.
Deactivating timer-started heating
Do as follows to manually switch off the heater
before the set time has elapsed:
3602296d
The heater will now run for 60 minutes.
Heating of the passenger compartment will
begin as soon as the engine coolant has reached
an adequate temperature.
Deactivation of heater after direct start
If the battery is not sufficiently charged or the
petrol tank is close to empty, the parking heater
will be switched off.
Repeated use of the parking heater combined
with only short journeys can discharge the
battery and impair starting.
In order to ensure that the generator receives
sufficient time to produce the amount of
energy needed without discharging the battery
as a result of regular heater use, drive the car
for a period equalling the time during which
the heater has been active.
(option)
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