GF83.70-P-3066Q Activate Heater With Stationary Heater Switch, Function

GF83.70-P-3066Q Activate Heater With Stationary Heater Switch, Function
- with CODE (228) Stationary heater [models 209.3 as of 1.6.04]

Component Identification:

Function requirements
^ Circuit 15R off or
^ Circuit 15R On
^ Tank content > 19 %

Function
1. Operate STH switch (N72s12).
With circuit 15R Off, the operation time has to be longer than 2 s, otherwise only the preselect time menu in the instrument cluster is opened.

2. The "Stationary heater ON" signal is relayed to the STH control unit (A6n1) by the lower control panel control unit (N72) via CAN-B (CAN-B).
3. The STH control unit (A6n1) starts the "Heat or Ventilate" inquiry in the AAC control and operating unit (N22) or the comfort AAC (C-AAC) control and operating unit (N22/7) via CAN-B.
4. The AAC control and operating unit (N22) or the comfort AAC (C-AAC) control and operating unit (N22/7) is activated and compares the current interior temperature to the preset temperature value.
5.1. Interior temperature < desired temperature value (request: "heat"):
^ The AAC control and operating unit (N22) or the comfort AAC (C-AAC) control and operating unit (N22/7) transmits the "Heat" signal to the STH control unit (A6n1) via CAN-B (CAN-B).
5.2 Interior temperature > desired temperature value (request: "ventilate"):
^ The AAC control and operating unit (N22) or the comfort AAC (C-AAC) control and operating unit (N22/7) transmits the "Ventilate" signal to the STH control unit (A6n1) via CAN-B (CAN-B) and switches to "Stationary ventilation" mode.

The red LED in the STH switch (N72s12) indicates stationary heating and the blue LED indicates stationary ventilation.