| After each engine start the flame monitor -G64- must inform the heater control unit -J162- within 130 seconds after the heating has switched on, that the flame is burning normally. If this not the case then the heater unit will automatically attempt a second start. If, after the second start, the flame still does not burn normally, the heater will remain switched off until the auxiliary heater is switched on again. |
| In part load mode the combustion air blower -V6- operates at reduced rpm and the metering pump -V54- delivers only approx. 50% of fuel (reduced pulse frequency). |
| Abortion of start procedure |
| The start procedure is aborted if: |
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| The flame monitor -G64- registers that the flame is not burning normally within 130 seconds. |
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| The coolant temperature sender for heater -G241- or the overheating sensor -G189- detects a temperature above 125 °C. |
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| There is a temperature difference of more than 15 °C between the coolant temperature sender for heater -G241- and the overheating sensor -G189-. |
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| The heater control unit -J162- detects a fault; read out the fault memory using the vehicle diagnosis, testing and information system -VAS 5051A-. |
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