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Thermo 90 S / Thermo 90 ST 3 Function description

303

A Glow plug

B Metering pump

C Combustion air fan

D Flame monitor

E Operation indicator light

F Circulating pump

G Vehicle fan

3.6 Malfunctions

3.6.1 Fault lock-out

Fuel is supplied for max. 240 seconds if the flame does

not start to burn.

Fuel is supplied for max. 240 seconds if the flame goes

out during operation.

The fuel supply is shut off if the system overheats

(temperature limiter is tripped).

Once the cause of the fault has been eliminated, the fault

lock-out is cancelled by switching the heater off and on

again.

If the undervoltage guard switches off the system

for longer than 20 seconds, the fuel supply is interrupted.

Thermo 90 S and Thermo 90 ST

12 volts 10.5 V - 0.5 V

24 volts 21 V -1 V

Webasto Thermo 90 ST Workshop Manual

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