Electrolux EFC 6405 Service Instruction - Page 4

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Electrolux EFC 6405 Service Instruction

2.3 Low Voltage Operation

The so-called "low voltage gas operation" is an exception. If the electrical power supply voltage
in 230-V or 12-V operation is insufficient to maintain the cooling operation, the AES switches to
gas operation under certain conditions. A yellow LED displays this state. The conditions for swit-
ching over to gas operation are described in Section 2.2. If gas operation is selected due to low
voltage, the refrigerator remains in gas operation for 30 minutes to avoid a continuous switching
back and forth (oscillation) between the energy sources. After 30 minutes of gas operation, the
electronics checks the applied voltage at regular intervals. If the power supply voltage again
becomes sufficient, the refrigerator again switches to 230-V or 12-V operation.

2.4 Tank Stop

The AES electronics does not begin operating the refrigerator on gas until the motor has been
turned off for 15 minutes to avoid an undesired switchover to gas operation during a tanking
procedure.

2.5 Thermostat Sensor

The thermostat sensor consists of an electrical resistor (NTC). The resistor is installed on the
evaporator cover, but it does not have a direct connection to the evaporator coil. The purpose is
to measure the air temperatures on the inside of the refrigerator. This is how the electronics
always controls the refrigerator at the temperature that has been set once, even for changing
ambient temperatures within the framework of the unit's capacity.
Important:: The sensor must not come into direct contact with the aluminum evaporator (space
sensor is not an evaporator sensor) to provide correct functioning.
The device goes into continuous operation if the thermostat sensor is defective.
Thermostat Sensor
Reference value of the sensor:
Room temperature in °C
5°
10°
15°
20°
4
Resistance (kOhm)
ca. 7,24
ca. 5,63
ca. 4,42
ca. 3,50