13
Fan Motor
Fan Blade
Suction Tube
Connector
Condenser
Compressor
Drier
Filter
PTC-Starter
Run Capacitor
Clip
34
Defrost Drain Pan
Access Cover
C - Electrical Components / Operation
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 consist-
ing of a solid state PTC relay with a thermally oper-
ated overload protector, and a run capacitor. See
Figure C1.
Figure C1
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 C3.)
The solid state relay plugs directly onto the
compressor start and run terminals. (See Figure 2.)
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 C3.)
Figure C2
Figure C3
NOTE
There are 2 exploded views (Cabinet and
System) at the end of this section to assist you in
troubleshooting.
