Samsung | RF266AB | User manual | Fast Track Troubleshooting

Fast Track Troubleshooting
Models Covered:
RF266AA**/XAA
RF266AB**/XAA
RF266AC**/XAA
French Door Refrigeration
NOTICE:
RF266AA & AB** 01/09
Parts Change: Refer to bulletin.
All Water Tank Parts
IMPORTANT SAFETY NOTICE – “For Technicians Only” This service data sheet is
intended for use by persons having electrical, electronic, and mechanical experience
and knowledge at a level generally considered acceptable in the appliance repair trade.
Any attempt to repair a major appliance may result in personal injury and property
damage. The manufacturer or seller cannot be responsible, nor assume any liability for
injury or damage of any kind arising from the use of this data sheet.
Publication # tsRF266AA Revision Date 08/12/2010
Forced Mode: Press the Pwr Freeze– Fridge
buttons simultaneously for 8-12 seconds
(No sound when both buttons are pressed
at the same time) until the display beeps
and goes blank.
Self Diagnosis: Press the Pwr Freeze—Pwr
Cool buttons simultaneously for 8-12 seconds
(No sound when both buttons are pressed at
the same time) until the display quits blinking.
Release the buttons and read Fault Codes.
This will also cancel the Fault Mode created by
self-diagnosis at power up.
Wait 5 seconds between button pushes
Press the Freezer button
one time at the Test Mode
to Force Compressor Run.
Measure fan and compressor voltage at main PCB.
Press the Freezer button
a second time to Force
Fridge Defrost. Measure
defrost voltage at main
PCB.
Sealed System
Press Freezer button a
third time to Force Defrost
for Fridge & Freezer,
measure defrost voltages
at main PCB
Sales Mode, No Compressor Operation
Press Power Freeze & Freezer temp buttons
simultaneously for 3 sec ( you will hear a “Ding
Dong”) to remove or put into Sales Mode. When
in the Sales Mode the Display will show "OF" "OF"
Removing power will not cancel this mode.
Component Value Chart
Compressor → Condenser →Side Cluster → Hot Pipe→
Dryer → R Capillary → R Evaporator → F Evaporator →
Suction Pipe → Compressor
Component
Resistance Wattage Voltage
Freezer Defrost Heater
60Ω
240
120vac
Fridge Defrost Heater
120Ω
120
120vac
French Mullion Heater
1323Ω
10
120vac
Fill Tube Heater
1323Ω
10
120vac
Sensors
2.5kΩ-89kΩ
N/A
1~4.5vdc
Fans
N/A
N/A
7~12vdc
Refrigerant Charge
R134a 5.64 oz.
1
DC FAN MOTORS
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 will be 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.
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 1.5Ԭ 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 1.5Ԭ for 5 minutes, it completes the harvest
(if the ice bin is not sensed as full).
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.
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 temperature. If water is not hooked up, the
freezer will always be at –14 unless “Ice Off” is selected.
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.
Please note, some shattering is normal for a
flex tray icemaker.
Ice Maker Thermistor
Ice Maker Test Button
Temperature/Resistance/Voltage Chart for Samsung Refrigerators Sensors
Temp.
(Ω)
Volts
Temp.
(Ω)
Volts
Temp.
(Ω)
Volts
Temp.
(Ω)
Volts
-29.2°F
-27.4°F
-25.6°F
-23.8°F
-22.0°F
-20.2°F
-18.4°F
-16.6°F
-14.8°F
-13.0°F
-11.2°F
-9.4°F
-7.6°F
-5.8°F
-4.0°F
-2.2°F
64227
61012
57977
55112
52406
49848
47431
45146
42984
40938
39002
37169
35433
33788
32230
30752
4.326
4.296
4.264
4.232
4.199
4.165
4.129
4.093
4.056
4.018
3.98
3.94
3.899
3.858
3.816
3.773
1.4°F
3.2°F
5.0°F
6.8°F
8.6°F
10.4°F
12.2°F
14.0°F
15.8°F
17.6°F
19.4°F
21.2°F
23.0°F
24.8°F
26.6°F
28.4°F
28021
26760
25562
24425
23345
22320
21345
20418
19537
18698
17901
17142
16419
15731
15076
14452
3.685
3.64
3.594
3.548
3.501
3.453
3.405
3.356
3.307
3.258
3.208
3.158
3.107
3.057
3.006
2.955
32.0°F
33.8°F
35.6 °F
37.4 °F
39.2 °F
41.0°F
42.8°F
44.6°F
46.4°F
48.2°F
50.0°F
51.8°F
53.6°F
55.4°F
57.2°F
59.0°F
13290
12749
12233
11741
11271
10823
10395
9986
9596
9223
8867
8526
8200
7888
7590
7305
2.853
2.802
2.751
2.7
2.649
2.599
2.548
2.498
2.449
2.399
2.35
2.301
2.253
2.205
2.158
2.111
62.6°F
64.4°F
66.2°F
68.0°F
69.8°F
71.6°F
75.2°F
77.0°F
78.8°F
80.6°F
86.0°F
87.8°F
89.6°F
91.4°F
95.0°F
96.8°F
6771
6521
6281
6052
5832
5621
5225
5000
4861
4690
4218
4072
3933
3799
3547
3428
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
-0.4°F
29350
3.729
30.2°F
13857
2.904
60.8°F
7032
2.064
100.4°F
3204
1.213
2
Samsung 'Refrigerator' Diagnostic Code Quick Guide
Error Items
LED
TROUBLE
TESTING
I/M-SENSOR (R on
Twin I/M units)
Ice Maker Sensor Error- open or short-circuit, connector failure.
Cause is also a temperature reading > 122°or < -58 ° F
The voltage at MAIN PCB
Sensor between 4.5V~1.0V
R-SENSOR
Refrigerator Room Sensor Error- open or short-circuit, connector
failure. Cause is also a temperature reading > 122°or < -58 ° F.
The voltage at MAIN PCB
Sensor between 4.5V~1.0V
DEFROST SENSOR
OF R ROOM
Ref. Defrost Sensor Error- open or short-circuit, connector failure.
Cause is also a temperature reading > 122°or < -58 ° F
The voltage at MAIN PCB
Sensor between 4.5V~1.0V
R-FAN ERROR
This error indicates the Refrigerator Evap Fan is not spinning at the
correct RPM or the fan feedback line is open.
Fan voltage at MAIN PCB
shall be between 7V~12V
I/M FUNCTION
ERROR(R on Twin I/M)
This error indicates the Ice tray has not returned to level after an ice
harvest. The error is displayed after three failed attempts.
Replace I/M
R-DEFROSTING
ERROR
Refrigerator Room defrost heater- open or short-circuit, connector
failure, or defective temperature fuse/bi-metal. Defrost on over 80
minutes
Disconnect defrost connector
from PCB, check resistance
PANTRY-DAMPERHEATER ERROR
Sensor system in Pantry Room errors
Disconnect heater connector
from PCB, check resistance
PANTRY-SENSOR
ERROR
CR Room Sensor Error- This can be an open or short-circuit, contact The voltage of MAIN PCB
failure. Cause is also a temperature reading > 122°or < -58 ° F.
Sensor between 4.5V~1.0V
WATER HEATER
ERROR
Error is displayed when the water reservoir tank heater is open or
shorted
EXT-SENSOR
Ambient Temp. Sensor Error- open or short-circuit, connector failure. The voltage at MAIN PCB
Cause is also a temperature reading > 122°or < -58 ° F
Sensor between 4.5V~1.0V
F-SENSOR
Freezer Compartment Sensor Error- open or short-circuit, connector The voltage at MAIN PCB
failure. Cause is also a temperature reading > 122°or < -58 ° F
Sensor between 4.5V~1.0V
F-DEF-SENSOR
Freezer Room Defrost Sensor Error- open or short-circuit, connector The voltage at MAIN PCB
failure. Cause is also a temperature reading > 122°or < -58 ° F
Sensor between 4.5V~1.0V
F-FAN ERROR
This error indicates the Freezer Evap. Fan is not spinning at the
correct RPM or the fan feedback line is open.
C-FAN ERROR
This error indicates the Condenser Fan is not spinning at the correct Fan voltage at MAIN PCB
RPM or the fan feedback line is open.
shall be between 7V~12V
FRENCH DOOR ICE
ROOM SENSOR
Ice Room Sensor Error- open or short-circuit, connector failure.
Cause is also a temperature reading > 122°or < -58 ° F
F-DEFROSTING
ERROR
Freezer defrosting heater- open or short-circuit, connector failure, or Disconnect defrost connector
defective temperature fuse/bi-metal. Defrost on for over 80 minutes from PCB, check resistance
FRENCH DOOR ICE
ROOM FAN ERROR
Uart ERROR
COMMUNICATION
This error indicates the Ice Room Compartment Evap. Fan is not
Fan voltage at MAIN PCB
spinning at the correct RPM or the fan feedback line is open.
shall be between 7V~12V
This error is not applicable, if the error is detected during diagnostic
No Repair Necessary
testing please ignore it.
L↔M ERROR
COMMUNICATION
Communication error within the Main PCB
Replace main PCB
P↔M ERROR
COMMUNICATION
Communication between the Main PCB and Keypad
Check wiring in door &
cabinet, Panel PCB, Main
PCB
Disconnect heater connector
from PCB, check resistance
Fan voltage at MAIN PCB
shall be between 7V~12V
The voltage at MAIN PCB
Sensor between 4.5V~1.0V
3
Model : RF266AA**, RF266AB**, RF266AC**
nominal voltages listed
CN10 Low Volt Pwr
1-3 5VDC (Red-Blk)
5-3 12 VDC (Yel-Blk)
CN73 A/C Load 120vac
5-(CN70-1) Dispenser Valve (W/Blk-Red)
7-(CN70-1) Ice Maker Valve (Prp-Red)
CN70 120vac
1 Common Line L (Red)
5-(CN71-5) French Heater (Yel-Gry)
7-(CN71-9) R Defrost (Wht-Org)
9-(CN71-9) F Defrost (Brn-Org)
CN78
7,8 Pantry Disp
9-11 (Blu-Wht) 12vdc
10-11 Sw input (Prp-Wht) 5vdc
CN91 Pantry Room Damper
1-2 Damper Heater (Blk-Brn) 12vdc
3-4 Damper Motor (Wht-Blu)
5-6 Damper Motor (Yel-Red)
CN50 Display
4-6 (Org-Pnk) 13vdc
5-6 (Yel-Pnk) 5vdc
7 GND 5vdc
8- (CN75-1) Ice/Water Sw (Blu-Gry)
CN90 - Ice Maker
1-2 Eject Motor (Red-Blk) 12vdc
4-3 Ice Sensor (Wht-Wht) 2.3~3.3vdc
5-8 Test Switch (Gry-S/Blu)
6-8 +5vdc (Blu)
7-8 Hall IC Out (Prp-S/Blu)
8 : GND (S/Blu)
CN30 Sensors & Switches
1-5 Freezer Dr Sw (Blk-Gry)
2-(CN50-7) R Door Sw (Prp-Gry)
3-(CN75-1) F Sensor (Red-Gry) 3.5~4.2vdc
4-(CN75-1) F Def Sensor (Org-Gry) 2.3~4.2vdc
6-(CN75-1) R Sensor (Wht-Gry) 2.4~2.8vdc
7-(CN75-1) R Def Sensor (S/Blu-Gry) 2~4.2vdc
8-9 Pantry Sensor (W/Blk- Gry) 2.6~2.8vdc
CN32 Sensor
1-4 Ambient Sensor (Wht-Wht) 1.2~2 vdc
CN71 120vac
1-(CN70-1) R Lamps (Blu-Red)
3-(CN70-1) F Lamp (Prp-Red)
5 Common N (Gry)
7-(CN70-1) Comp (S/Blu-Red)
9 Heater Common (Org)
CN75 F, R, C Fans
2-1 F Fan (Yel-Gry) 7~11vdc
3-1 R Fan (Org-Gry) 7~11vdc
4-1 C Fan (S/Blu-Gry) 7~11vdc
5 F Fan FG (Blk)
6 R Fan FG(Brn)
7 C Fan FG(Red)
4
7. Wiring diagram
7-1) Model : RF266*
RF266AA**/XAA, RF266AB**/XAA, RF266AC**/XAA
DISPLAY operating part
Heater
Voltage(W)
Resistance
(Ohm)
240
120
10
10
55(220)
110(441)
1323(5290)
1323(5290)
AC
INPUT
Composite
resistance(Ohm)
55(220)
102(407)
1323(5290)
* Caution
Common difference of resistance is applied 7%
The resistance value of heater might be changed
for improvement of quality or performance.
AC
INPUT
WATER DISPENSER SWITCH part
AC
INPUT
PANTRY DISPLAY operating part
AC load operating part
(HEATER, COMP.,ETC.)
AC
INPUT
ICE MAKER operating part
FAN MOTOR operating part
SWITCH, SENSOR part
PANTRY ROOM DAMPER operating part
SMPS power part
AC
INPUT
5
100