2007 Electrolux Side-By-Side Refrigerator Service Manual

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Section C - Electrical Components

Electrical Grounding

All refrigerators are equipped with a power supply cord incorporating a three-prong grounding plug and a ground wire which is attached to the refrigerator cabinet for protection against shock hazard. Each electrical component is either cabinet mounted or connected through a ground wire to the cabinet to complete the ground. Certain components, such as defrost timers, may be double insulated and do not require a ground wire.

Ensure the electrical wall receptacle is of the three prong type and is properly grounded in accordance with the National Electrical Code and/or local codes.

Compressor Electrical Components and Circuits on Models with Standard Compressor

The new series of very high efficiency compressor is equipped with all new electrical components consisting of a solid state PTC relay with a thermally operated overload protector, and a run capacitor.

Solid State Relay

The solid state relay has no moving parts. It consists of a PTC resistor mounted in a plastic case with appropriate terminals. PTC (Positive

Temperature Coefficient) simply denotes a resistor which increases in resistance as its temperature is increased. The self-heating PTC resistor used in the solid state relay has the unique characteristic of changing from low to very high resistance very abruptly, thus serving as an on-off switch. (See

Figure C1.)

The solid state relay plugs directly onto the compressor start and run terminals. Relay terminals

1, 2, and 5 are connected within the relay, as are terminals 3 and 6.

A run capacitor is connected to relay terminals 2 and

3, so it is connected in parallel with the PTC resistor.

One side of the 120 VAC power is connected to relay terminal 1. The other side of line is connected to the overload protector. (See figure C1.)

To Check/Replace Relay

1. Disconnect electrical supply to refrigerator.

2. Remove bale wire holding relay to compressor.

3. Remove relay assembly from compressor.

(See Figure C2.)

Figure C1

Figure C2

4. Use small, flat-bladed screwdriver to disconnect leads to relay assembly.

5. Use flat headed screwdriver to gently pry capacitor from relay assembly.

6. Use ohmmeter to check resistance between terminals 5 and 6. Resistance should be 3 to 12 ohms at normal room temperature. Shorted relay will read 0 ohms. Open relay will read very high or infinite resistance.

7. If ohm readings are out of range, replace relay.

8. Reverse this procedure to re-assemble.

NOTE

When replacing leads to the PTC relay, ensure locking tabs snap into terminal.

Overload Protector

The overload protector is completely thermally operated. It will open from excessive heat or current. Unlike prior overloads, the internal bimetal is not self-heating, and is not a part of the electrical circuit. The overload has a small built-in coil heater that is in series with the compressor start and run windings (See Figure

C1).