Service Mode Tests - GE GYE18JBL Technical Service Manual

Service Mode Tests

Display Mode
t1 Demo Mode
t2 Communication Test Dispenser to Main communications test. Test will query main
t3 Display Self-Test
t4 Sensor Self-Test
t5 Duct Door Test
t6 Recess Heater Test
t7 Damper Test
t8 Fan Speed Test
t9 Cooling System Test This mode runs the sealed system 100% of the time. This test
t10 Enter Pre-Chill
t11 Toggle Defrost
t12 Refrigerator Reset
t13 Service Mode Exit
t14 Celsius / Fahrenheit
Selector
Comments
Enters demo mode. All temperature control board functions
will operate normally but the unit will not cool. Cycle power to
refrigerator to exit Demo Mode.
board its version, "P"/"F" on most right display if Pass/Fail.
All of the LEDs and numerical segments will illuminate. All
displays will initially show "888". The slew keys FF and FZ will
be used to increment and decrement the displays. The buttons
will be used to toggle the status of the LED it is associated with.
To exit this test, enter the Service Mode code.
This test does a check on all thermistors located throughout
the unit. The test mode will stop flashing and the thermistor
numbers from 1 to x (x is the number of thermistors) will appear
on the most left display. For each thermistor, the dispenser will
respond by displaying the following on the most right display:
P: Pass
F: Fail
1: FF Thermistor
3: FZ Thermistor
5: IB Thermistor
Duct Door will open for 10 seconds and then close.
Turns on the dispenser recess heater for 60 seconds.
FF Damper will open, pause briefly, and then close.
Cycles each of the system fans on for 5 seconds in the following
order: (Evaporator, Ice Box and Condenser).
will automatically time out after 1 hour of run time. A refrigerator
reset may exit this mode.
This places the freezer in pre-chill mode, essentially issuing a
"Force Pre-chill" command to the main control. It will return to
normal operation on its own. This command will be ignored if
the refrigerator is set to OFF/Standby mode.
Each time any button on the temperature board other than
four temperature adjust buttons is pressed the status of the
defrost heater will toggle. There will be a 20 second delay
before defrost heater will turn on. If the evaporator thermistor
temperature is above defrost termination temperature the heater
will not turn on.
Resets both Dispenser Board and Main Board. Also exits any
tests initiated in Service Mode.
Causes a soft reset to occur at the dispenser board. Note this
will not terminate test modes that the main board is maintaining
as a result of the service diagnostics mode. To do that, a
Refrigerator Reset should be performed.
Change Temperature display units from Celsius to Fahrenheit or
Fahrenheit to Celsius.
– 85 –
O: Open thermistor circuit
S: Short thermistor circuit
2: Ambient Thermistor
4: Evap Thermistor