CITROEN Jumpy Multispace Owner's Handbook Manual page 136

Battery
ECONOMY MODE
After the engine has stopped, with the key
in the ignition position, certain functions
(windscreen wiper, electric windows, courtesy
lamps, audio equipment, etc.) can only
be used for a cumulative duration of thirty
minutes, to prevent discharging of the battery.
Once the thirty minutes are over, the active
functions are put on standby and the battery
warning lamp flashes accompanied by a
message in the screen.
To resume the use of these functions
immediately, start the engine and let it run
for a few minutes.
The time available will then be double the
time for which the engine was left running.
However, this time will always be between
five and thirty minutes.
A flat battery will prevent the engine from
starting.