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Fast Track Troubleshooting
Publication # tsRS2520SW Creation Date 11/23/2009
Models Covered:
RS2520SW/XAA
RS2533SW/XAA
RS2533VQ/XAA
RS2534BB/XAA
RS2534VQ/XAA
RS2534WW/XAA
RS2622SW/XAA
SxS Refrigeration
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.
Self Diagnosis: Press both buttons (Power
Freeze—Power Cool) simultaneously (No sound when both buttons are pressed at the same time) ’til the display quits blinking and beeps, 8-12 seconds, then release and read
Fault Codes.
This will also cancel the Fault Mode created by self-diagnosis at power up.
Forced Mode: Press both buttons (Power
Freeze – Fridge) simultaneously (No sound when both buttons are pressed at the same time) ‘til it beeps and goes blank,
8-12 seconds
Wait 5 seconds between button pushes
Press Freezer button one time at the Test Mode to
Force Compressor Run, measure fan and compressor voltages at main
PCB
Press Freezer button a second time to Force
Defrost of Fridge, 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
Refrigerant Charge
R134a 7.76 oz.
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"
Compressor
Dryer →
→ Condenser
R Capillary →
→
R Evaporator
Suction Pipe → Compressor
Side Cluster
→
→ Hot Pipe
F Evaporator
→
→
Component Value Chart
Freezer Defrost Heater
Fridge Defrost Heater
58
103
Ω
Ω
215
140
Freezer Drain Heater
Dispenser Heater
320 45 120vac
2880 Ω 5 120vac
Water Tank Heater 3600 Ω 4 120vac
Fill Tube Heater 2880 Ω 5 120vac
Sensors 2.5k
Ω -89k Ω N/A 1~4.5vdc
1
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
Ԭ 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
Ԭ
(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.
Guide – Bin Full Ice Maker Test Button
Ice Maker Thermistor
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 sensor reading. The sensor should read 3.7 volts at the main board connector when the cube temperature is 1 degree. After the fill, the sensor 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.
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.
DEFROST
This model series uses a Defrost Heater in the Fridge and the Freezer compartment that is part of the Evaporator Coil.
NOTE: Evaporator Covers May Break If Removed While Frozen To Coil. They must be replaced if there is any damage, as this will cause “ice” to form at top or bottom of the evaporator coil or in the drains.
Temp. ( Ω
Temperature/Resistance/Voltage Chart for Samsung Refrigerators Sensors
) Volts Ω ) Volts Temp. ( Ω ) Volts Temp. ( Ω ) Volts
35.6 °F 12233 2.751 66.2°F 6281 1.929
37.4 °F 11741 2.7 68.0°F 6052 1.885
39.2 °F 11271 2.649 69.8°F 5832 1.842
-0.4°F 29350 3.729 30.2°F 13857 2.904
2
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.
Error Items
I/M-SENSOR
R-SENSOR
DEFROST SENSOR OF R
ROOM
R-FAN ERROR
I/M FUNCTION ERROR
COOL SELECT ZONE
SENSOR
R-DEFROSTING ERROR
EXT-SENSOR
F-SENSOR
F-DEF-SENSOR
F-FAN ERROR
C-FAN ERROR
F-DEFROSTING ERROR
Uart ERROR
COMMUNICATION
L-M ERROR
COMMUNICATION
P-M ERROR
COMMUNICATION
LED TROUBLE
Samsung 'Refrigerator' Diagnostic Code Quick Guide
Ice Maker Sensor Error- open or short-circuit, connector failure. Cause is also a temperature reading > 122°or < -58 ° F
TESTING
The voltage at MAIN PCB Sensor betw een 4.5V~1.0V
Refrigerator Room Sensor Error- open or short-circuit, connector failure.
Cause is also a temperature reading > 122°or < -58 ° F.
Ref. Defrost Sensor Error- open or short-circuit, connector failure. Cause is also a temperature reading > 122°or < -58 ° F
This error indicates the Refrigerator Evap Fan is not spinning at the correct
RPM or the fan feedback line is open.
The voltage at MAIN PCB Sensor betw een 4.5V~1.0V
The voltage at MAIN PCB Sensor betw een 4.5V~1.0V
Fan voltage at MAIN PCB shall be betw een 7V~12V
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
Cool Select Zone Sensor Error- open or short-circuit, connector failure.
Cause is also a temperature reading > 122°or < -58 ° F
The voltage at MAIN PCB Sensor betw een 4.5V~1.0V
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
Ambient Temp. Sensor Error- open or short-circuit, connector failure. Cause is also a temperature reading > 122°or < -58 ° F
The voltage at MAIN PCB Sensor betw een 4.5V~1.0V
Freezer Compartment Sensor Error- open or short-circuit, connector failure.
Cause is also a temperature reading > 122°or < -58 ° F
The voltage at MAIN PCB Sensor betw een 4.5V~1.0V
Freezer Room 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 betw een 4.5V~1.0V
This error indicates the Freezer Evap. Fan is not spinning at the correct RPM or the fan feedback line is open.
Fan voltage at MAIN PCB shall be betw een 7V~12V
This error indicates the Condenser Fan is not spinning at the correct RPM or the fan feedback line is open.
Freezer defrosting heater- open or short-circuit, connector failure, or defective temperature fuse/bi-metal. Defrost on for over 80 minutes
This error is not applicable, if the error is detected during diagnostic testing please ignore it.
Fan voltage at MAIN PCB shall be betw een 7V~12V
Disconnect defrost connector from PCB, check resistance
No Repair Necessary
Communication error w ithin the Main PCB
Communication betw een the Main PCB and Keypad
Replace main PCB
Check w iring in door & cabinet,
Panel PCB, Main PCB
3
RS2520SW/XAA RS2533SW/XAA RS2533VQ/XAA
RS2534BB/XAA RS2534VQ/XAA RS2534WW/XAA
RS2622SW/XAA
CN71 120 VAC
9-(CN70-11) R-Fan (W/Blu-Red)
7-(CN70-11) Cover Ice Sol (W/Blk-Red)
5-(CN70-11) Ice/Water Sol (Prp-Red)
3-(CN70-11) Auger Mtr (Pnk-Red)
1-(CN70-11) Cube Sol (Yel-Red)
CN70 120 VAC
1-11 Dispenser/Water Tank HTR (Blu-Red)
3 (Gry) Neutral
5-11 Compressor (S/Blu-Red)
7 (Org) Heater Common
9-7 R-Def/Ice Pipe HTR (Wht-Org)
11 (Red) L1
13-7 F-Def HTR (Brn-Org)
CN72 Fans
4-5 F-Fan (S/Blu-Blk) 10~11.1vdc
3-5 C-Fan (Blk-Org) 8.3~10vdc
2 F-Fan Control (Brn)
1 C-Fan Control (Red)
CN31
1-4 Ambient Sensor(Wht-Wht) 1.2~2vdc
2-3 Ice Switch (Org-Org)
CN50 Panel PCB
CN10 120VAC
1-3 A/C Line
CN30 Sensors/Switches
1-2 F-Door Sw (W/Red-Brn)
5-6 R-Door Sw (W/Blu-Brn)
3-(CN72-7) F Sensor (Yel-Gry) 3.5~4.2vdc
4-(CN72-7) F Def Sensor (Blu-Gry) 2.3~4.2vdc
7-(CN72-7) R Sensor (Gry-Gry) 2.4~2.8vdc
8-(CN72-7) R Def Sensor (Prp-Gry) 2~4.2vdc
CN90
1-2 I/M Motor (Red-Blk) 12 VDC
3-4 I/M Sensor (Wht-Wht) 2.3~3.3vdc
5-8 Test SW (Gry-S/Blu)
6-8 Horiz check SW (Blu-S/Blu)
7-8 Ice Check SW (Prp-S/Blu)
8 (S/Blu) vdc Gnd
4
5
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