GE ZIB240P Technical Service Manual page 22

Diagnostic
Diagnostics
Mode
07 Sensor System Test
10 Damper Test
12 100% Run Time
14 Defrost Heater
15 Reset
16 Exit Diagnostic Mode
21 Switch (Reed) Test
22 Lights
23 DC Fresh-Food Fan
Delay for Evaporator
Fan and Damper after
24
Defrost (Fresh-Food
w/Icemaker unit only)
Description
Checks each thermistor. The following is displayed for
1 second and then the instantaneous temperature for 5
minutes or until any other key is pressed: "FF" = Fresh-
Food "EP" = Evaporator "IC" = Icemaker. Note: If no
Icemaker, a "- -" is displayed. If thermistor is electrically
opened or shorted "bAd" is displayed. The sampling rate
for each thermistor in this mode is 1 second. Next button
push terminates time-out. See Thermistor Resistance
chart.
The damper opens for 5 seconds then closes. When
opening, displays "OPn". When closing, displays "CLS".
Compressor, Condenser fan, and Fresh-Food fan are on
100% of the time for 20 minutes. Displays "run" when the
Compressor, Condenser fan, and Fresh-Food fan are
on. Note: If keypads A or B are pressed, exits back into
Service Mode keeping the Compressor and fans on. If
any other key is pressed, the Compressor and fans turn
off. Displays "OFF" for 3 seconds. Exit this mode (back to
Service Mode) by pressing keypad A, B, or D.
Turns on defrost cycle for 5 minutes and then turns off
the defrost. Displays "On" when on. Displays "OFF" for 3
seconds when off. Note: Next button push terminates time-
out.
Causes a system reset and exits Service Mode. Note:
Starts factory default operating mode.
Exits out of Service Mode and displays "OUt" for 3
seconds. Note: Resumes previous operating mode.
Checks each switch. The following is displayed for 1
second for each switch: "dor" = Door "dd" = Double-
Drawers. Each of these is followed by displaying "0". The
display will increment with each switch closure. Once "9"
is reached the display goes back to "0" and starts over.
Note: Press any key to move to the next switch. Exits after
last switch is displayed. If no Door or Drawer, a "- -" is
displayed.
Toggles the interior lights and switchable glass on for 20
seconds then off. Displays "On" when they are on, and
"OFF" for 3 seconds when they are off and exits.
Toggles the Fresh-Food fan on. Displays "On" when the
fan is running. Displays "OFF" for 3 seconds when off
and exits. Note: Exit this mode (back to Service Mode) by
pressing keypad A, B, or D.
Changes time value of the evaporator delay from 1 to
8 minutes (with 1-minute increments). Stores result in
EEPROM. Once "08" is reached the display goes back to
"01" and starts over. Note: Press keypad D to increment
the value. Once you have entered the new delay, press
keypad A or B to store value in EEPROM before exiting
the mode. If no Damper, a "- -" is displayed. Exit this mode
(back to Service Mode) by pressing keypad A, B, or D.
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