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Brushless DC Fan motors are used to save energy. The fans operate at two speeds. Fan speed information is read by
the Main PCB. If the fan speed exceeds 600 RPM or the speed is too slow, or stopped the fan drive circuit is disabled,
After 10 seconds the circuit tries again with 3 seconds of DC voltage If the fan continues this activity for 5 cycles, 10
seconds off 3 seconds on, the fan drive circuit is disabled for 10 minutes.
TO TEST THE FAN CIRCUIT VOLTAGE.
Power off and back on to check the DC voltage to the motor, wait from 10 to 60 seconds for the fan voltage to kick in,
and then check fan voltage, the average reading is 9 VDC. If you get 3 seconds of voltage every 10 seconds for the 5
fan power up cycles, then the Main PCB is good.
NOTE: You may need to put unit in FORCED FREEZE mode to activate the fans/compressor.
If the fan blade is blocked by ice, then defrost and check the motor again, after removing power from the unit.
If the evaporator is ice blocked and thus blocking the air flow, the fan will over RPM and is stopped. Remove ice and
check the motor again. If everything is clear around the fan blade then the motor would be at fault. Continuous fan errors
will be displayed on the front panel display. PLEASE NOTE: The door switches control the evaporator fan motors. Have
them closed to test the motors. Delay time 10 – 60 seconds.
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.
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.
Temperature/Resistance/Voltage Chart for Samsung Refrigerators Sensors
Temp.
(Ω)
Volts
-29.2°F
64227
4.326
-27.4°F
61012
4.296
-25.6°F
57977
4.264
-23.8°F
55112
4.232
-22.0°F
52406
4.199
-20.2°F
49848
4.165
-18.4°F
47431
4.129
-16.6°F
45146
4.093
-14.8°F
42984
4.056
-13.0°F
40938
4.018
-11.2°F
39002
3.98
-9.4°F
37169
3.94
-7.6°F
35433
3.899
-5.8°F
33788
3.858
-4.0°F
32230
3.816
-2.2°F
30752
3.773
-0.4°F
29350
3.729
# tsRFG297AB RevC 03/30/2011
DC FAN MOTORS
Heat Release Ice Makers
FREEZER TEMPERATURE CONTROL BY THE ICE MAKER
Temp.
(Ω)
Volts
1.4°F
28021
3.685
3.2°F
26760
3.64
5.0°F
25562
3.594
6.8°F
24425
3.548
8.6°F
23345
3.501
10.4°F
22320
3.453
12.2°F
21345
3.405
14.0°F
20418
3.356
15.8°F
19537
3.307
17.6°F
18698
3.258
19.4°F
17901
3.208
21.2°F
17142
3.158
23.0°F
16419
3.107
24.8°F
15731
3.057
26.6°F
15076
3.006
28.4°F
14452
2.955
30.2°F
13857
2.904
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.
Temp.
(Ω)
32.0°F
13290
33.8°F
12749
35.6 °F
12233
37.4 °F
11741
39.2 °F
11271
41.0°F
10823
42.8°F
10395
44.6°F
9986
46.4°F
9596
48.2°F
9223
50.0°F
8867
51.8°F
8526
53.6°F
8200
55.4°F
7888
57.2°F
7590
59.0°F
7305
60.8°F
7032
Volts
Temp.
(Ω)
2.853
62.6°F
6771
2.802
64.4°F
6521
2.751
66.2°F
6281
2.7
68.0°F
6052
2.649
69.8°F
5832
2.599
71.6°F
5621
2.548
75.2°F
5225
2.498
77.0°F
5000
2.449
78.8°F
4861
2.399
80.6°F
4690
2.35
86.0°F
4218
2.301
87.8°F
4072
2.253
89.6°F
3933
2.205
91.4°F
3799
2.158
95.0°F
3547
2.111
96.8°F
3428
2.064
100.4°F
3204
Volts
2.019
1.974
1.929
1.885
1.842
1.799
1.716
1.675
1.636
1.596
1.483
1.447
1.412
1.377
1.309
1.277
1.213
2
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