16
Service Manual EKI
For internal use only
4.8.4
LED for key-lock function
With the control switched on, activation of the key-lock function is displayed by an LED above the key-
lock button.
4.9
Buzzer
Each activation of a button which results in a sensible and feasible action is acknowledged by a brief
acoustic signal. These actions are:
♦
Switching the touch control on and off with the main switch buttons.
♦
Switching the key-lock function on and off with the key-lock button.
♦
With the key-lock deactivated, switching a cooking zone on and off with the plus or minus buttons.
♦
With the key-lock deactivated, changing the cooking level with the plus or minus buttons.
4.10
Fan
A fan is used to improve the cooling of the power components. It is activated at two speed levels and
depends on the heat sink and cooking zone temperatures.
4.10.1 Fan activation via heat sink temperature
The fan is switched on at half speed at a heat sink temperature of over 50°C. If the temperature rises to
above 60°C, the fan switches over to full speed. If the temperature falls below 45°C, the fan is switched
off.
The parameters of the temperatures are stored in the EEPROM.
4.10.2 Fan activation via the cooking zone temperature
The fan switches to full speed irrespective of the heat sink temperature if the temperature of one cooking
zone exceeds 250°C. If the heat sink temperature does not necessitate otherwise, the fan is switched
off again at about 30 K less.
The activation value is stored in the EEPROM as a parameter (see power reduction control via cooking
zone temperature - Cancelling reduction control). The deactivation value is calculated using a constant.
