GF83.70-D-4206HZ STH or ZUH Switch, Component Description

GF83.70-D-4206HZ STH Or ZUH Switch, Component Description

- with CODE (HZ9) Heater booster, diesel







S46/10 Stationary heater switch

Location
The stationary heater switch is located in the lower control panel (UBF) to the left next to the steering wheel.

Task
When the stationary heater switch in the upper subfield is operated with status "circuit 15 ON" and "circuit 61 ON", heater booster (ZUH) operation is activated or deactivated. Activation is indicated by the red light emitting diode (LED) integrated in the stationary heater switch going on. In the event of deactivation, the red LED integrated in the stationary heater switch goes out. The ZUH heater operation has a "Memory function" (automatic heater operation activation of the heater booster heater unit).
The "Memory function" remains active (also in the event of a status change of circuit 15 and circuit 61) until it is deactivated again by operating the stationary heater switch in the upper subfield.

Design
The stationary heater switch is a 2-stage rocker switch, which is only subdivided into an upper subfield and is equipped with a red LED.

Function
The actuations of the stationary heater switch in the upper subfield are read in by the warm water auxiliary heater 2 control unit (N33/2) via a discrete line.
The red LED integrated in the warm water stationary heater switch is also actuated by the warm water auxiliary heater 2 control unit via a discrete line.