Webasto Thermo 90 ST Operating Instructions Manual - page 5
View/delete wake-up time
Press the
button repeatedly until the bell symbol
appears in the display and read off
the wake-up time.
Delete the wake-up time by pressing the
button repeatedly until the bell symbol
is no
longer visible in the display.
Remote control
Possible using an external optional immediate heat button.
If a fault occurs, check that the fuses and plug connections are in perfect condition and se-
cure.
If this action does not correct the defect, consult your authorised Webasto dealer.
After the heater has been shut down due to a fault lock-out, a coded flashing signal is
emitted through the operation indicator during the run-on time of the heater.
These coded flashing signals are designed to assist the authorised Webasto dealer in isolating
the fault.
Cause
Remedy
No combustion after start and re-
peat start
Switch off heater and switch on again.
If the heater fails to re-start consult your
authorised Webasto dealer.
Flame extinguishes during opera-
tion
Voltage drop for more
than 20 seconds
Check fuses, electrical connections and
battery
Heater has overheated due to
lack/loss of coolant
Refill coolant as directed by vehicle manufacturer.
Action in the event of faults
Heater switches off automatically (= fault lock-out)
9025292B_Operating_Instructions_Thermo_90_ST_WDT_en.fm Page 5 Monday, September 24, 2012 4:33 PM