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
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 terminal 1 is for the neutral connection,
A run capacitor is connected to relay terminals 2 and 3, so it is
connected in parallel with the PTC resistor. Terminals 5 and 6
are internal; 5 is connected to the main winding and 6 to the
start winding. 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.)
Figure C1