Samsung RS255BASB Manuale Utente Scaricare il pdf (Pagina 3)

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 mo-

tors. Have them closed to test the motors. Delay time 10 – 60 seconds.

Error Items LED TROUBLE TESTING

I/M- SENSOR

Ice Maker Sensor Error- open or short-circuit, connector f ailure. Cause is

also a temperature reading > 122°or < -58 ° F

The voltage at MAIN PCB Sensor

betw een 4.5V~1.0V

R- SENSOR

Refrigerator Room Sensor Error- open or short-circuit, connector f ailure.

Cause is also a temperature reading > 122°or < -58 ° F.

The voltage at MAIN PCB Sensor

betw een 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

betw een 4.5V~1.0V

R- FA N 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

betw een 7V~12V

I/M FUNCTION ERROR

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

The voltage at MAIN PCB Sensor

betw een 4.5V~1.0V

R- DEFROSTING ERROR

Refrigerator Room def rost heater- open or short-circuit, connector failure, or

defective temperature fuse/bi-metal. Def rost on over 80 minutes

Disconnect defrost 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

betw een 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

betw een 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

betw een 4.5V~1.0V

F- FA N ERROR

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

C- FA N ERROR

This error indicates the Condenser 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

F-DEFROSTING ERROR

Freezer defrosting heater- open or short-circuit, connector failure, or

defective temperature fuse/bi-metal. Def rost on for over 80 minutes

Disconnect defrost connector

from PCB, check resistance

Uar t ERROR

COMMUNICA TION

This error is not applicable, if the error is detected during diagnostic testing

please ignore it.

No Repair Nec es s ary

L- M ERROR

COMMUNICA TION

Communication error w ithin the Main PCB Replace main PCB

P-M ERROR

COMMUNICA TION

Communication betw een the Main PCB and Keypad

Check w iring in door & cabinet,

Panel PCB, Main PCB

Samsung 'Refrigerator' Diagnostic Code Quick Guide

1 2 3 4 5 6

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Samsung RS255BASB Manuale Utente Pagina 3

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