Components of the independent park heater/auxiliary heater
Observe the following points if the independent park heater/auxiliary heater Thermo Top Z is installed:
Model series/engine variant |
Independent park heater/auxiliary heater without K-bus |
Independent park heater/auxiliary heater with K-bus |
E46/Diesel (M47) |
as from series launch up to production break PU98 (1998_09) |
as from production break PU98 (1998_09) |
E38/Diesel (M51, M57) |
from production break PU98 (1998_09) to March 99 (1999_03) |
as from March 99 (1999_03) |
E39/Diesel (M51, M57) |
from production break PU98 (1998_09) to March 99 (1999_03) |
as from March 99 (1999_03) |
E38, E39/gasoline engine |
|
as from March 99 (1999_03) |
Operation |
analog with lines |
digital via K-bus |
Diagnosis |
Not possible |
With fault memory queries |
The control module of the independent park heater/auxiliary heater features diagnostic capabilities with fault memory (E46 as from production break PU98, E38 and E39 as from March 99). It detects faulty statuses, defective components, overheating and under-voltage .
The heater plug and flame monitor have been combined to form one component, the heater plug/flame monitor (4) . This component can be replaced separately in case of repair .
The combustion air blower (2) is an integral part of the combustion chamber (11) and cannot be replaced individually . The CO setting is conducted ex factory in this independent park heater/auxiliary heater and can subsequently no longer be varied.
The circulation pump (14) is mounted externally on the heater and can be replaced separately when conduction repairs .
The metering pump is mounted on the underbody at the level of the driver's door and can be replaced separately when conducting repairs .
The combustion chamber (11) together with control module (7) (with integrated coolant temperature sensor ) control the operating statuses of the independent park heater/auxiliary heater. The complete independent park heater/auxiliary heater unit should be replaced in case of repair (defective control module or defective temperature sensor ) .