Samsung | RM257ABRS/XAA | Fast Track Troubleshooting

Fast Track Troubleshooting
Publication # tsRM257AB Revision Date 03/30/2011
Models Covered:
RM257ABBP/XAA,
RM257ABPN/XAA,
RM257ABRS/XAA
4 Door 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
(Freezer– Fridge) 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 (Freezer–
Fresh Select Zone) simultaneously (No
sound when both buttons are pressed at
the same time) „til it beeps and goes blank,
8-12 seconds
3600RPM
Press Freezer button one
time at the Test Mode to
Force Compressor High
Speed Run, measure fan
and Compressor voltages at main PCB
2450RPM
Press Freezer button a
second time to Force
Mid Speed Run
Refrigerant Charge
R134a 7.76 oz.
2200RPM
Wait 5 seconds between button pushes
Press Freezer button a
third time to Force Low
Speed Run
Component Value Chart
Press Freezer button a
forth time to Force Defrost of Fridge & Freezer,
measure defrost voltage
at main PCB
Component
Resistance Wattage Voltage
Freezer Defrost Heater
72Ω
200
120vac
Fridge Defrost Heater
180Ω
80
120vac
CF Defrost Heater
144Ω
100
120vac
CR Defrost Heater
180Ω
80
120vac
F Drain Tube/Heater
2880Ω
5
120vac
R Drain Tube/Heater
2880Ω
5
120vac
Dispenser Heater
2880Ω
5
120vac
Sealed System
Water Tank Heater
29Ω
5
12vdc
Fill Tube Heater
29Ω
5
12vdc
Sensors
2.5kΩ-89kΩ
N/A
1~4.5vdc
Fans
N/A
N/A
7~12vdc
Sales Mode, No Compressor Operation: Press Energy Saver & 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.
SUPPORT INFORMATION
Training — Plus One http://my.plus1solutions.net/clientPortals/samsung/
Help — GSPN http://service.samsungportal.com/
Samsung Product Support TV http://support-us.samsung.com/spstv/howto.jsp
Customer information videos and chat programs. Programs for Fridges, Laundry, Ranges & D/W
# tsRM257AB RevA 03/30/2011
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 it 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.
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.
Ice Maker Test Button
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.
Guide – Bin Full
Ice Maker Thermistor
Temperature/Resistance/Voltage Chart for Refrigerators Sensors
Please note, some shattering is normal for
a flex tray icemaker.
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
-0.4°F
64227
61012
57977
55112
52406
49848
47431
45146
42984
40938
39002
37169
35433
33788
32230
30752
29350
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
3.729
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
30.2°F
28021
26760
25562
24425
23345
22320
21345
20418
19537
18698
17901
17142
16419
15731
15076
14452
13857
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
2.904
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
60.8°F
13290
12749
12233
11741
11271
10823
10395
9986
9596
9223
8867
8526
8200
7888
7590
7305
7032
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
2.064
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
100.4°F
6771
6521
6281
6052
5832
5621
5225
5000
4861
4690
4218
4072
3933
3799
3547
3428
3204
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
# tsRM257AB RevA 03/30/2011
2
Error Items
Samsung 'Refrigerator' Diagnostic Code Quick Guide
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
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 between 4.5V~1.0V
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
COOL SELECT ZONE
SENSOR
Cool Select Zone Sensor Error- open or short-circuit, connector failure.
Cause is also a temperature reading > 122°or < -58 ° F
R-DEFROSTING
ERROR
Refrigerator Room defrost heater- open or short-circuit, connector failure,
or defective temperature fuse/bi-metal. Defrost on over 80 minutes
PANTRY-DAMPERHEATER ERROR
Sensor system in Pantry Room errors
Disconnect heater connector
from PCB, check resistance
CR Room Sensor Error- This can be an open or short-circuit, contact
failure. Cause is also a temperature reading > 122°or < -58 ° F.
The voltage of MAIN PCB
Sensor between 4.5V~1.0V
DEFROST SENSOR CR
ROOM 4-Door
CR 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 between 4.5V~1.0V
DEFROST SENSOR OF
CF ROOM 4-Door
CF Room Defrost Sensor Error- open or short-circuit, connector failure.
Cause is also a temperature reading > 122°or < -58 ° F.
CR Compartment Defrosting heater- open or short-circuit, connector
failure, or defective temperature fuse/bi-metal. Defrost on for over 80
minutes
The voltage at MAIN PCB
Sensor between 4.5V~1.0V
Disconnect heater connector
from PCB, check resistance
DEFROST SENSOR OF
R ROOM
R-FAN ERROR
CR-SENSOR 4-Door
CR-DEFROSTING
ERROR 4-Door
The voltage at MAIN PCB
Sensor between 4.5V~1.0V
Disconnect defrost connector
from PCB, check resistance
CF-DEFROSTING
ERROR 4-Door
Disconnect heater connector
CF Compartment defrosting heater-open or short-circuit, connector failure,
from PCB, check resistance
or defective temperature fuse/bi-metal. Defrost on for over 80 minutes
WATER TANK HEATER
ERROR
Error is displayed when the water reservoir tank heater is open or shorted
Disconnect heater connector
from PCB, check resistance
EXT-SENSOR
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 between 4.5V~1.0V
F-SENSOR
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 between 4.5V~1.0V
F-DEF-SENSOR
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 between 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.
This error indicates the Condenser Fan is not spinning at the correct RPM
or the fan feedback line is open.
CF Room Sensor Error- open or short-circuit, connector failure. Cause is
also a temperature reading > 122°or < -58 ° F
Fan voltage at MAIN PCB shall
be between 7V~12V
Fan voltage at MAIN PCB shall
be between 7V~12V
The voltage at MAIN PCB
Sensor between 4.5V~1.0V
Disconnect defrost connector
from PCB, check resistance
F-FAN ERROR
C-FAN ERROR
CF-SENSOR 4-Door
F-DEFROSTING
ERROR
Freezer defrosting heater- open or short-circuit, connector failure, or
defective temperature fuse/bi-metal. Defrost on for over 80 minutes
CF-FAN ERROR
4-Door
CR-FAN ERROR
4-Door
ICE PIPE HEATER
ERROR
Uart ERROR
COMMUNICATION
L?M ERROR
COMMUNICATION
This error indicates the CF Compartment Evap. Fan is not spinning at the
correct RPM or the fan feedback line is open.
This error indicates the CR Compartment 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
Fan voltage at MAIN PCB shall
be between 7V~12V
Error is displayed when the ice maker fill pipe heater is open or shorted.
Replace Fill Tube Ass'y
P?M ERROR
COMMUNICATION
This error is not applicable, if the error is detected during diagnostic testing
No Repair Necessary
please ignore it.
Communication error within the Main PCB
Replace main PCB
Communication between the Main PCB and Keypad
Check wiring in door & cabinet,
Panel PCB, Main PCB
# tsRM257AB RevA 03/30/2011
3
CN= Connector # for measuring voltages; () means go to connector #, pin # shown in () for voltage common.
CN30 Sensors & Switches Component Name
4-(CN76-1) F Def Sensor (Org-Gry) 2.3~4.2vdc
Voltage on operating component
Pin #s & wire colors on each connector to measure voltages
Key To Read PCB Layout
CN72 & CN79 120vac
1-(CN70-9) CR Room Lt (Wht-Red)
3-(CN70-9)CF Room Lt (Brn-Red)
5-(CN70-9) R Room Lt (Blu-Red)
7-(CN70-9) F Room Lt (Prp-Red)
11 Line N (Gry)
15- Htr Commons (Org)
CN73 120vac
1-(CN70-9) Cube Mtr (Yel–Red)
3-(CN70-9) Auger Mtr (Pnk–Red)
5-(CN70-9) Water Solenoid/Valve (W/Blk–Red)
7-(CN70-9) Ice Solenoid/Valve (Prp–Red)
CN70 120vac
1-(CN72-15) CR Def Htr (Blk-Org)
3-(CN72-15) CF Def Htr (Yel-Org)
5-(CN72-15) R Def & Drain Htr (Wht-Org)
7-(CN72-15) F Def & Drain Htr (Brn-Org)
9 Line1 (Red)
CN71 120vac
3-1 Dispenser Htr (W/Blk-Gry)
5-7 Home Bar Htr (Blu-Gry)
CN78
1 +5 VDC (Red)
3 VDC GND (Blk)
5 +12 VDC (Yel)
CN01
Gate Way
CN77
3-(CN74-7) Comp (Org-Gry) 2.5vdc
CN75
1 +12 VDC (Red)
2 Coil A (Blk)
3 Coil A Inverse (Yel)
4 Coil B (Org)
5 Coil B Inverse (Blu)
CN90 Ice Maker
1-2 I/M Motor (Red-Blk) 12vdc
3-4 I/M Sensor (Wht-Wht) 2.1~3.7vdc
5-8 Test Sw (Gry-S/Blu)
6-8 +5 VDC (Blu-S/Blu)
7 Hall IC Out (Prp)
Ext Sensor
read 7-8 of F Hinge
connector 1.2~2 vdc
CN74
1 C Fan FG (Red)
2 R Fan FG (Brn)
3 F Fan FG (Blk)
4-7 C Fan Mtr (S/Blu-Gry) 7~12vdc
5-7 R Fan Mtr (Org-Gry) 7~12vdc
6-7 F Fan Mtr (Yel-Gry) 7~12vdc
7 vdc GND (Gry)
CN76
1 & 11 +12 VDC (Blk-S/Blu)
1-2 CF Fan Mtr (Blk-Brn) 7~12vdc
3 CF Fan FG (Red)
1-4 Ice Pipe Heater (Blk-Org) 12vdc
11-5 CR Fan Mtr (S/Blu-Yel) 7~12vdc
6 CR Fan FG (Pnk)
11-10 H2O Tank Htr (S/Blu-Wht) 12vdc
CN50 Display
4-6 +12 VDC (Org-Pnk)
5-6 +5 VDC (Yel-Pnk)
8-7 Ice sw (Prp-Blu)
9-7 Water sw (Wht-Blu)
6 vdc GND (Pnk)
CN40
1-3 Cube Mtr Sw (Blk-Gry)
2 Home Bar Dr Sw (W/Red)
CN30
1-7 F Dr Sw (Blk-Gry)
2-7 CF Dr Sw (Brn-Gry)
3-7 F Sensor (Red-Gry) 3.5~4.2vdc
4-7 F Def Sensor (Org-Gry) 2.3~4.2vdc
5-7 CF Sensor (Yel-Gry) 2.7~4.05vdc
6-7 CF Def Sensor (Pnk-Gry) 2.3~4.2vdc
8-14 R Dr Sw (Prp-Gry)
9-14 CR Door Sw (Blu-Gry)
10-14 R Sensor (Wht-Gry) 2.4~2.8vdc
11-14 R Def Sensor (S/Blu-Gry) 2~4.2vdc
12-14 CR Sensor (W/Blk-Gry) 2.4~3.2vdc 13-14 CR Def Sensor (W/Red-Gry) 2~4.2vdc
# tsRM257AB RevA 03/30/2011
4
Compressor & System Operation Testing
The Time Divided Multi-cycle (TDM) System (Stepper Valve) is
used to switch refrigerant flow . This improves temperature control and energy efficiency.
If it fails in the all evaporator mode, it should work properly, using
slightly more energy. If it fails in the Freezer evaporator only
mode, there will be a Fridge no cool Force on the Fridge with the
―Power Cool‖ option. Monitor the Fridge evaporator(s) temp by
using the Defrost Sensor(s). If the temp doesn’t decrease, then
suspect the Main PCB is not supplying signal to switch the diverter valve.
TEST BEFORE INTERPRETING LED BLINKING FREQUENCY
Compressor not running
1. Activate Forced Compressor Operation, wait 2 minutes (in case of high head pressure)
2. If compressor doesn’t start, check CN75 for 2~2.8vdc (if not there replace Main PCB)
3. Check for 120vac to inverter PCB CN02 L-N
4. If voltage is OK, remove power, disconnect CN03 (Inverter PCB) and check resistance to the
windings. Aproxametly10 ohms. If not correct , inspect wire harness, if OK replace compressor.
5. Disconnect CN02 (SMPS PCB), check resistance to Overload , if open replace overload.
CN78 To Comp Inverter Board
1 +5 VDC (Red)
3 VDC GND (Blk)
5 +12 VDC (Yel)
CN03 Compressor Windings
1 Compressor (Blue)
3 Compressor (Prp)
5 Compressor (Wht)
CN04 Compressor Control
1-3 12vdc
2-3 5vdc
3 vdc GND
4-3 Comp Signal (Org)
CN77 To Comp Inverter Board
3- ( CN74-7) Comp control (Org-Gry) 2~2.8vdc
CN02
Overload & A/C Line
1 OLP (Red)
3 OLP (S/Blu)
3 L (Red)
1 N (Gry)
Protection
Functions
LED Blinking Frequency
Test
Replace
Starting Failure
Check the Inverter PCB & Comp
Relay Connectors
Connectors OK,replace Inverter PCB, if same,
replace compressor
SPM Fault
If blinking after reset,
Check System for restriction & refrigerant, if OK
replace Inverter, if same, replace compressor
Detecting
Position Failure
Check Inverter Connectors,
Connectors measure OK, replace compressor, if
same, replace Inverter PCB
Motor Locked
Compressor Locking
Compressor
Compressor Locking, check input
voltage
Compressor Locking, check input
voltage
Replace Inverter PCB, if same, replace
Compressor
Replace Inverter PCB, if same, replace
Compressor
Low Voltage
Over Voltage
# tsRM257AB RevA 03/30/2011
5
# tsRM257AB RevA 03/30/2011
6
Ice Maker
Water Filter
Inverter PCB
Main PCB
Insert flat blade screwdriver in the slot shown and unlock the tabs
Water Tank
Handle Removal
Disassembly of Quatro Cool Compartment Floors, both access the same way
# tsRM257AB RevA 03/30/2011
7
Arctic & Fresh Zone Fan/Sensor Covers, both access the same way
Water Tank Heater Connector
Pull cover up and out far
enough to unplug wire
harnesses Remember to
lock in bottom first when
reinstalling
Fresh Food
Compartment
Fridge Evap Ass’y
Fresh Food
Failure of the Drain Hose Heater
could cause water build up on
fridge floor and cooling issues
# tsRM257AB RevA 03/30/2011
Convertible Section
8
Snap off cover
Remove 4 screws
Remove screw
caps
Freezer
Compartment
# tsRM257AB RevA 03/30/2011
Unplug wire
harnesses
Failure of the Defrost Drain Hose
Heater could cause ice build up on
freezer floor and cooling issues in
Freezer and/or Arctic Zone
9
Download PDF