Ice Maker (Fresh Food Compartment)
4-4
Diagnostic Service Mode
Activation
To activate the Ice Maker Service Diagnostic Mode,
press and hold Fresh Food and Freezer (+) temperature
keys at the same time for 5 seconds.
Activation of Ice Maker Service Diagnostic Mode
automatically turns off all Ice Maker Control PCBA
outputs. The compressor runs at fixed speed of 4500
rpm and the condenser fan turns on until Service Mode
is deactivated. The damper is closed and the Fresh
Food and Freezer lights are enabled as well as the alarm
audio. Defrost of the main system is not allowed. The
EEV is driven back to its close position when the first
Diagnostic test number is flashing.
Deactivation
To exit service mode, press and hold Fresh Food (+) key
for 5 seconds. Service mode is also automatically
deactivated after 5 minutes of no key entries (that
includes Com Lost). All outputs are turned Off and the
EEV is driven to its closed position. Previously selected
main system and Ice Maker operational modes are
restored.
Testing
To actuate an Ice Maker load of the selected test step
(turn On or Off), use the ON/OFF key of the user
interface.
To step to the next ice maker sequential test, press the
Fresh Food (+) key. To step back to the previous Ice
maker sequential test, press the Fresh Food (–) key.
The advancement to the next or the previous test will
automatically reset all ice maker outputs and will close
the EEV valve in case it was opened. The selected Test
Number will be displayed on Fresh Food display.
After pushing the ON key to start automatic test or turn
on the load, the ice maker control will display the test
result on the Freezer two digit display. When waiting for
the test to be automatically performed and the result
displayed, the test number (test ID) will flash on/off. After
the automatic test is completed the test result will be
displayed as “P” – pass, or “F” – Fail.
Freezer Recovery Mode
There is a program on the main control system for the
product to limit or stop the flow of refrigerant to the ice
maker. This program was added to the main control
system to allow the freezer evaporator to get as much
refrigerant as is needed to maintain product temperature.
If refrigerator is in a defrost cycle, the main control board
will stop the fl ow of refrigerant to the ice maker for 20
minutes after the product comes out of defrost to allow
the freezer evaporator temperature to recover from the
defrost cycle. The compressor does not run during
defrost so there will be no fl ow of refrigerant to ice maker
during defrost. If the temperature in the freezer is 8°F
above freezer set point, the lower control board will stop
ice maker operation. Once the freezer temperature
drops to 4°F above the set point, the lower control board
will allow the ice maker to resume making ice cubes.
Example, freezer is set at +2°F, and freezer temperature
rises above 10°F, the lower control board will stop ice
making operations and only allow enough refrigerant to
fl ow to ice maker compartment to maintain temperature
to prevent ice melt. Once freezer temperature recovers to
+6°F, ice maker will resume normal operation.
Error Codes
The icemaker control will display error codes for certain
problems occurring with the ice maker. Consult the
customer on how the unit was operating and any codes
that were displayed that resulted in the service call.
IM/RAM Error
replace main
Go to flow chart for Ice t3
Ice Er
Ice CE
TH3 Sensor (open or short)
Ice t3
IM Com Lost
Go to flow chart 50C. Put into service
mode to verify.
Error Condition and Corrective Action
Freezer
Display
Display
Fresh
Food
Check J4-4, J4-5 and J4-6 Connector on
Icemaker board. Check J4 connector at
Main Control board. Check 15 pin inline
connector at control board, Pin#’s 4,9 & 14.
If all connections test good,
control board.
The Ice Maker Must Be Turned ON Before Entering
The Service Mode. Check the On/Off switch on the
User Control In The Food Door.
The Ice Maker must be turned ON before entering
the Service Mode. Check the ON/OFF switch on
the User Control in the food door to see that the ice
maker is in the ON position.
Figure 4-6. Ice Maker Error Codes
To Next Page