Control module malfunction switch-off, function - GF91.30-P-2007A

MODEL 210 as of 1.7.99 with CODE (401a) Front 

Voltage too low switch-off 

When the front HS and seat ventilation control module (N25/7)  recognizes that the voltage is too low, it switches off the heater output stages and the control outputs to the blower regulators for the seat ventilation.

The low voltage switch-off threshold depends on the time expired since circuit 15R ON.

Voltage too high switch-off 

When the control module recognizes that the vehicle electrical system voltage has exceeded 16c0.2 V, it switches off the heater output stages and the control output to the blower regulator for the seat ventilation.

The function illumination next to the control switch does not flash following excessive voltage switch-off.

Temperature too high switch-off 

The control module has an excessive temperature recognition feature for switching off the affected heater output stage when the temperature is impermissibly high.

The excessive temperature recognition feature is laid out so that heating stage I can be operated continuously and heating stage II twice in sequence (2 x 5 min) without switching off.

When the temperature too high switch-off is activated, the function illumination next to the control switch does not flash.

Switch-off in the event of short circuit, short circuit to ground 

When the control module recognizes a short circuit to ground or short circuit (to C. 30 or C. 31), it switches off the affected output. The function illumination does not flash following switch-off due to a short circuit or short circuit to ground.