Stationary heater control unit, component description - GF83.70-P-4066RF
MODEL 205, 253 with CODE 228 (Auxiliary heater)
Shown on model 205
Location
The stationary heater control unit is integrated in the stationary heater unit, which is located in the rear area of the right wheel arch.
Task
The stationary heater control unit has the following tasks:
- Reading in of signals
- Evaluation of input factors
- Actuation of components
- Transmitting signals
Reading in of signals
The input factors are read in via the following connections:
- Direct line
- Climate control LIN 2 (LIN B8-2)
Direct line
The signals from the following components are read via direct lines:
- Stationary heater temperature sensor (A6b1)
- Stationary heater thermal fuse (A6f1)
- Stationary heater glow plug/flame monitor unit (A6r4)
If the temperature of T = 125 °C in the stationary heater unit is exceeded, the thermal fuse recognizes overheating through the temperature sensor and switches off the stationary heater (STH) with subsequent overheating interlock.
Climate control LIN 2
The signals are read in via climate control LIN 2. The functions that use these signals are described in the individual function descriptions.
Evaluation of input factors
The input factors that have been read in are evaluated by the integrated microprocessor and the relevant components are then actuated.
Actuation of components
The following components are actuated via direct lines:
- Stationary heater combustion air blower (A6m2)
- Stationary heater glow plug/flame monitor unit
- Stationary heater switchover valve (Y16)
- Stationary heater fuel pump (Y23)
Transmitting signals
The signals are sent via climate control LIN 2. The functions that use these signals are described in the individual function descriptions.
Variants
Engine variants:
- Gasoline engine
- Diesel engine
| Wiring diagram for stationary heater (STH) control unit | PE83.70-P-2101-97FBA |