Page 8 Revision I FROM 2012-09-20
Short pressing of the key turns on the LED at the key and activates the window heater or fan.
After the time set in ‘d4’ the window demisting is automatically deactivated. If the parameter ‘r6’ is
set to 3, then the window temperature is also stabilised.
Another short press turns off the LED and the window heater/fan.
If you press and hold the key for about 1 second, the evaporator temperature monitoring is
activated. This condition is indicated by a flashing LED at the key. After 15 seconds the window
temperature monitoring is activated – if the ‘r6’ is set to 3, and the condition is indicated by display
flashing. This stage also takes 15 seconds. If the parameter ‘r6’ is other than 3, then there is no
window temperature sensor monitoring.
B - Defrosting
1. If you need to perform additional defrosting due to difficult operating conditions, press the
key. This will cause constant lighting of the green LED at the key, and the display will show
“dF” instead of temperature reading. This causes the appliance to enter the defrosting cycle.
2. If the defrosting is active and the evaporator temperature is higher than the ‘d2’ parameter setting,
then the appliance will enter the defrosting phase after about 10 seconds, and once completed,
returns to normal operation.
If the defrosting function is active and the evaporator temperature is lower than the ‘d2’ parameter
setting, the G-202 activates defrosting, and when the ‘d2’ temperature setting is reached, the Controller
enters the defrosting exit procedure (this condition is indicated by flashing of the green LED at the
key) consisting of a single dripping phase – when the compressor remains off for the time set in
the parameter ‘c3’.
3. The defrosting is complete when the evaporator temperature reaches the ‘d2’ temperature setting
or when the time exceeds the value stored in the parameter ‘c1’.
4. Once the “dF” is off and the defrosting is finished, the display will read the temperature stored
just before the defrosting process for the time set in the parameter ‘c7’ – this is to prevent claims
that may occur due to “sudden temperature changes in the appliance”.
5. The system behaves similarly in both manual and automatic defrosting.
C – Door opening sensor operating principle
1. When the door is opened the fan is immediately stopped and the light may be switched on
depending on the ‘r7’ parameter setting in the G-202. Temperature reading is shown in the
display.
2. After 30 seconds, if the door remains open, the display will continuously show a “dr” message.
For the controllers with buzzer installed, a short beep is emitted and repeated every 30 seconds.
3. If the door still remains open, then after the time set in the parameter ‘r8’ an alarm is activated
which is indicated by display flashing with the “dr” message, and in controllers with buzzer
installed – with an acoustic warning signal. At the same time the compressor is switched off.
4. If the ‘r8’ = 0, then the alarm is activated immediately after opening the door.
5. You can cancel the alarm by pressing any key. Closing the door deactivates the alarm and restores
normal operation.
6. The Controller allows to connect both a mechanical door opening sensor, which is closed when
the door opens (r6=01), as well as a mechanical or magnetic sensor which is opened when the
door is opened (r6=02).
HYSTERESIS
When programming the parameters ‘d0’ and ‘d1’ (minimum and maximum temperatures that can be set
by the user) you should also remember that the hysteresis value ‘d3’ causes additional “dragging” of the
temperature down and up from the value set by the user.
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