Fault Lock-Out - Webasto Air Top 2000 ST B Einbauanweisungen

Fault lock-out

14 Fault lock-out
The control unit has identified errors on individual heater components
and faults during the operation.
The heater is shut down (fault lock-out) if:
– No or incorrect start
– Temperature sensor defective
– Overheating sensor interrupt or short circuit
– Overheating sensor installed incorrectly
– Glow plug interrupt or short circuit
– Fan motor overload or blocked
or short circuit or interrupt
– Error in the metering pump or overheating guard circuit (start phase only)
– Undervoltage less than 10.5 V or overvoltage greater than 16 V and
for longer than 20 seconds (on 12 V heater)
– Undervoltage less than 21 V or overvoltage greater than 32 V and for
longer than 20 seconds (on 24 V heater)
– Control unit defective
– Overheating
– Flame monitor defective (petrol heater)
The fuel supply is stopped if the heater overheats.
The heater continues to run in the same way as if it is switched off
manually.
After it stops the control unit will be set to fault lock-out.
The overheating is indicated by the indicator flashing 10 times.
Rectify the cause of the fault.
To reset the fault switch the heater on and off briefly (at least 2 seconds).
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If serious malfunctions such as overheating or failure to start reoccur,
the heater is locked (F 12) and can be put back into service by
disconnecting the power supply with the heater switched on (e.g. by
removing and reinserting fuse).
Air Top 2000 ST