GE Profile PSB42LSRBV Technical Service Manual page 54

Note #3 (Control and Sensor System Self-Test)
This test does a check on all thermistors, fans, and defrost circuits. The thermistor test will display
pass, open or shorted. The fan and defrost tests will display pass or fail. Once this test is invoked,
the test mode will stop fl ashing and the numbers from 1 to 10 (corresponding to the chart below) will
appear on the HMI display.
1
2
3
4
5
For each test, the HMI will respond by displaying the following:
P = Pass
F = Fail
O = Open Thermistor Circuit
S = Short Thermistor Circuit
The control will display an O if the thermistor value is greater than 149.2K Ω (-58°F (-50°C)). The
control will display a S if the thermistor value is less than 1.34K Ω (149°F (65°C)).
Note #4 (100% Run Time)
This test runs the sealed system 100% of the time and will automatically time out after 1 hour. Cycle
power OFF or enter test mode 1 5 to reset and exit this mode.
Note: The 3-way valve position during 100% run time depends on the fresh food temperature. If the
fresh food temperature is satisfi ed, the 3-way valve opens to the freezer evaporator only. If it is not
satisfi ed, the valve opens to the fresh food evaporator and refrigerant fl ows through both evaporators.
Note #5 (Toggle the State of Defrost)
Any time a pad on the temperature board (other than the
status of the defrost heaters will toggle in the following sequence:
1. Fresh food heater ON.
2. Fresh food and freezer heaters ON.
3. Fresh food and freezer heaters OFF.
Pressing the pad a fourth time will cycle through the sequence again. During the sequence, heater
current can be measured.
• Fresh food heater - approximately 1.2 amps when measured at the CN01 connector black wire.
• Fresh food and freezer heaters - approximately 4 amps when measured at the CN01 connector
black wire.
FZ Room Sensor
FZ Defrost Sensor
FF Room Sensor
FF Defrost Sensor
Ambient Sensor
– 54 –
6 FZ Fan Error
7 FF Fan Error
8 Condenser Fan Error
9 FZ Defrost Error
FF Defrost Error
10
and pads) is pressed, the
COLDER WARMER