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 / petrol engine |
|
as from March 99 (1999_03) |
Operation |
analog with lines |
digital via K-bus |
Diagnosis |
Not possible |
With fault code memory queries |
The control unit of the independent park heater/auxiliary heater features diagnostic capabilities with fault code memory (E46 as from production break PU98, E38 and E39 as from March 99). It detects faulty statuses, defective components, overheating and undervoltage .
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 unit (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 unit or defective temperature sensor ) .