Heat Exchanger - GE Profile PSB42LSRBV Technical Service Manual

To check power to the main switch, check for
120 VAC between the black and red wires on the
connector shown below.
Power to
Power Return
Main Switch
from Main
Switch
Compressor
The refrigerator contains a variable speed inverter
compressor (2200 to 3800 RPM). The inverter is
part of the main power control board (PCB). The
compressor will start (if required) one minute after
power is applied to the refrigerator. Compressor
operation is determined by the fresh food and
freezer thermistors.
Should the compressor fail to start when required,
check the compressor windings and associated
wiring harness BEFORE checking for a power
control board (PCB) problem. The compressor
resistance between each pin should be
approximately 12 Ω. Measure the resistance at
CN08, between pin #7 (black wire), pin #8 (purple
wire), and pin #16 (blue wire).
A thermal overload, designed to protect the
compressor, is mounted within the compressor
terminal cover. The overload will open at 257°F
(125°C) and close at 156°F (69°C). The overload
should be checked at CN08, between the pin #14
and pin #15 (light blue wires).
Note: An open compressor overload will prevent
the main control board from operating. If voltage
is present at CN01, and the refrigerator is dead
(except for the interior lights), check to make
certain the thermal overload is closed.
Compressor Circuit
COMP
OVER-LOAD PROTECTOR
Refrigerant Charge
The refrigerant used in the sealed system is
R134a. Proper system charge is 8.11 oz.

Heat Exchanger

The heat exchanger is located at the rear of the
machine compartment, behind the compressor.
The tubing is coiled and foamed into a galvanized
cover. A replacement heat exchanger and cover
come as a complete assembly.
Heat Exchanger Cover
Shown with Cover Cut Open
– 35 –
CN08
BLACK
7
3
PURPLE
8
2
BLUE
1
LIGHT BLUE
14
LIGHT BLUE
15
16