Indicator Light Meanings And Fault Codes; Manual Defrosting Procedure - Electrolux FROST FREE CHEST FREEZER Service Manual

7. INDICATOR LIGHT MEANINGS AND FAULT CODES:

This series of frost-free chest freezer incorporates flashing and static indicator light codes to indicate a fault
with a specific component or operation as follows:
• Static red light and static green light illuminated
– Cabinet temperature incorrect (above –8 ºC).
• Flashing red light and static green light illuminated
– This indicates that the sensor is open circuit or the connecting plug may be in poor contact with the
control PCB. In this situation the cabinet reverts to a timed cycle of 30 minutes compressor 'run' time and
45 minutes of compressor 'off' time to protect the food within the cabinet, plus a fixed defrost cycle every
14 hours.
• Green light and yellow light flashing alternately,
– This indicates that the electronic control is unable to sense the presence of the defrost heater circuit. In
other words, the heater or thermal protectors could be open circuit or the connecting plugs may be in poor
contact with the control PCB. In this mode, the defrosting cycle is done on a timed basis lasting for 1 hour.
To execute the testing and the service, a manual defrosting procedure has been introduced that has to be
carried out with cold internal temperatures (this is to avoid the possible opening of the thermal protector of
the defrosting heater).
To start the manual procedure, ensure that:
•
-the electronic board is powered with thermostat knob ON,
position 5 (or anyway in a position between 90° and 270°);
•
-the lid closed (lamp switch is OFF).
Perform the 3 following operations:
1. turn the thermostat knob to OFF position;
2. open the lid more than 45
opening/closure);
3. turn the thermostat knob to ON, position 5 (or anyway to a position between 90° and 270°);
At this point the electronic board verifies the thermal cut-outs and all LEDs flash for 5 seconds; then if there
aren't any faults, the manual defrosting phase starts. If a fault occurs, the LEDs continue to flash.
WARNING: after placing the thermostat knob in OFF position (operation 1), there are 15 seconds to
perform the other 2 operations (operation 2-3) in the correct sequence.
In case of error or incorrect execution of the operations, before executing once again the manual defrosting
procedure, it is necessary to reset the standard functions switching off the power to the appliance (detach
the power cable).
The manual defrosting phase consists of:
. defrosting heater ON;
. green ON/OFF LED on;
. compressor and fan OFF;
In this case the electronic board performs the defrosting phase as a standard function and then continues
to operate normally.
FROST FREE CHEST FREEZER with ERF1050 electronic

8. MANUAL DEFROSTING PROCEDURE

o
angle 4 times within 15 sec (let pass at least 1 second between every
Service manual
COLD
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