Webasto Thermo 90 ST Operating Instructions Manual - Operation Of The Heater
Before switching on the heater, the vehicle heater must be set to "hot", and the vehicle heat-
er fan must be set to the slowest speed (reduced current consumption)!
Standard timer
General information
The standard timer allows the heater start time to be selected for a period of up to seven days.
Three cut-in times can be programmed, although only one of them may be activated.
The standard timer is equipped with a wake-up function.
When the ignition is switched on the timer shows the current time and the day. When the
heater is operating, the display and the buttons are lit.
When the timer is connected to the power supply all the symbols in the display will flash. The
time and day must be set.
Operation
The operation of the timer is designed such that all the flashing symbols can be adjusted using
the
and
buttons. If no button is pressed for five seconds the displayed time is saved.
If the
and
buttons are pressed for longer than two seconds, they will switch to high
speed adjustment.
If the ignition is switched off whilst the heater is in immediate heating mode, a remaining
operating time of 15 minutes will appear on the display and the heater will continue to op-
erate.
Switch on
Manual: by pressing the
button (immediate heat)
Automatic: By programming the start time.
Operation of the heater
Immediate
heat
Return
Indicator
Day
Combination timer
Program number
Program selector
Time
Standard timer
with alarm
Forward
Alarm display
9025292B_Operating_Instructions_Thermo_90_ST_WDT_en.fm Page 3 Monday, September 24, 2012 4:33 PM