# tsRFG298AA RevC 03/30/2011
3
Heat Release I/M Test Mode
Press and hold the ICE TEST S/W for at least 1.5sec, the
harvest function will start. If the ice maker Thermistor is be-
low 0 degrees the Ice maker heater turns on for about 2 min-
utes. If the temperature exceeds 0 degrees, Ice maker
heater turns on for 30 seconds. After the Ice maker heater
turns on for 30 seconds, the heater turns off and then Ice
maker harvest motor turns on. The motor will rotate in right
direction for about 3 minutes, after this, water supply valve is
turned on, then the valve is turned off, the test mode is com-
pleted. If the above operation is not carried out within 6 min-
utes, it will go into a fault mode.
Heat Release Ice Production Explanation
38 minutes after the water fill is complete, the control
board will check the temperature of the eject Thermistor,
on the Ice Maker Head, if the Thermistor reads a tem-
perature lower than 18.5 degrees for more than 5 sec-
onds, then the ice production process is completed. The
Ice maker will harvest if the ice bucket is not sensed as
full. If a Fault Mode is detected with the Ice Maker op-
eration, the Ice Maker stops working for 3 hours. Which
means, the Ice Maker checks the operation every 3
hours until it works properly.
FREEZER TEMPERATURE CONTROL BY THE ICE MAKER
Interior Temperature of the freezer will be set to -14 degrees Fahrenheit until the ice bucket is full. When the ice
bucket is full, the freezer will maintain original set temperature. Also, whenever the ice is used, the freezer will
again set to -14 degrees Fahrenheit. Selecting "Ice Off” will allow the freezer to be controlled by the set tem-
perature. If water is not hooked up, the freezer will always be at –14 unless “Ice Off” is selected.
Heat Release Ice Makers
FLEX TRAY Ice Makers
When the initial power is applied, the ice tray will stand by for 2 hours.
After the 2-hour standby time, the Ice Maker Sensor will check
the temperature, when it is lower than 1.5
℉
for more than 5 minutes,
it will do a harvest, with or without ice in the tray, then fill with water.
58 minutes after water is supplied to the Ice Tray, the Ice Maker
Sensor temperature will be checked. When the Ice Maker Sensor
maintains lower than 1.5
℉
for 5 minutes, it completes the harvest
(if the ice bin is not sensed as full).
Thermistor senses temperature to determine water fill on newer units
Filling the tray
After the water fill is completed, the ice maker sensor will evaluate the
water volume one and a half minutes later. When it detects no or low
water level, it will add more water. First supply time will be 1.5 sec,
next one will be 1 sec and the last will be 2 sec.
Shattered Ice – Flex Tray
When all ice shatters, it's because of a bad
tray or ice cube temp that is too cold (lower
than -5 degrees). In some areas, there are
water issues that can also cause shattered
cubes. The temp in the freezer should not
have any effect on this issue, as long as it’s
below 1.5 degrees F, as a properly installed
sensor will not read the freezer temp, only the
water/ice temp.
Check the Ice tray for defects in the plastic.
Ice that is too cold will shatter during
harvest. This can be from the (1) sensor not
reading the correct temp (2) or the sensor not
mounted correctly (3). By programming the
icemaker offset value to a lower number (4),
the board not understanding the reading.
To check the sensor, you must check the tray
temp (not air temp) and compare it to the sen-
sor reading. The sensor should read 3.7 volts
at the main board connector when the cube
temperature is 1 degree. After the fill, the sen-
sor will read water temp 1.5 to 2.2 volts.
To clear offsets, put unit into Diagnostics
mode.
Please note, some shattering is normal for
a flex tray icemaker.
Guide – Bin Full
Ice Maker Thermistor
Ice Maker Test Button
First Defrost Cycle, Both
Defrost Cycle Fridge only
Defrost Cycle Fridge & Freezer
13 hrs, Pause Time 10 minutes
6~11 hrs (varies according to
conditions)
12~22 hrs (varies according to conditions)
Defrost Cycle Timing
FLEX TRAY Ice Makers
