Samsung RM255BASB, RM255BABB manual IC75 Input IC75 Output FAN, #18 GND0.8V, 107

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CIRCUIT DESCRIPTIONS

1)As shown in the Figure, C/F, C/R FAN are connected to the CN75 connector, and FAN MOTOR consists of ND, VCC, FG.

2)If you intend to operate the C/F-FAN or C/R-FAN according to a certain condition in the MAIN PCB, which controls the refrigerator, follow the instructions below.

3)For example, to operate C/F-FAN, a 5V voltage comes out of MICOM #6 first. Then, the 5V voltage is input to IC75 #1 PIN, and the #18 PIN has a changed electric potential from OV to GND.

4)12V is connected to CN76 , and input to C/F-FAN Vcc. FAN MOTOR GND is connected to IC75 #18 PIN

through CN76 .

5) Thus, with the IC75 #18 PIN changed to GND by the signal from MICOM#6 PIN, the

FAN MOTOR will be operated in the order 12V CN76 C/F -FAN Vcc C/F-FAN GND CN76 IC75 #18 PIN GND.

6) Here, with normal operation of the FAN MOTOR, a square wave is generated in MOTOR FG, and this wave is

input as follows, MOTOR FG CN76

R413 MICOM #8.

7)Using this FG signal, it can be determined whether the FAN MOTOR is operating normally, and in case of FG signal errors, FAN motor errors are detected to use as refrigerator error data.

8)When the MICOM #6 signal changes to 0V again, IC75 # 1 PIN is OFF, and IC75 #18 PIN is OFF. Thus, current cannot flow, and the FAN MOTOR will stop..

 

 

MICOM STATUS

IC75 INPUT

IC75 OUTPUT

 

 

 

 

 

C/F-FAN

ON

#6 5V

#1 5V

#18 GND(0.8V)

 

 

 

 

OFF

#6 0V

#1 0V

#18 11~12V

 

 

 

 

 

 

C/R-FAN

ON

#4 5V

#4 5V

#15 GND(0.8V)

 

 

 

 

OFF

#4 0V

#4 0V

#15 11~12V

 

 

 

 

 

 

The principle of operation is equally applied to the C/F and C/R FAN, and the BOX FAN uses the same specification.

BOX FAN SPEC

12V / 0.2A

107

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Contents RM255BARB RM255BASB RM255BABB Authorized Training Center Campuses Important Safety Notice Contents Precautionssafety Warnings Symbols Forbidden Product Specifications This operation instruction covers various models ManualAfter packing 386lbs Model SpecificationRM25 Electric Parts Specification SensorSpecifications Model Dispenser Home Bar Electric ComponentsItems RunningPart Code Optional Material SpecificationsPhotograph Operating Instructions & Installation Temperature Control Operation Digital PanelPower Freeze and Power cool Operation Power Freeze OperationPower cool Operation By in inside function irrespective of current settingAt Initial Power On Lock FunctionAble to operate on front panel Cube / Crushed / ICE OFF Selection FunctionMachine Room F-Fan Motor Delay Function Water Dispenser FunctionLight Operation Load Operation ConditionInitial Operation Reverse rotation CCW Forward rotation CW Ice extractionHorizontal position Interval about 880ms Maximum torsion pointWater Supply Function Ice-Making FunctionIce Extraction Function Water Supply TimeBold numerals indicate relevant ice tray steps Horizontality operation Defrosting Function Defrosting period is fixed to 8 hoursArctic Zone 53.6 62.6Arctic Select Zone Function FunctionOperation Fresh Select Zone FunctionFunction Operation Specification Temp .8 ~ 44.6 of the Fridge compartmentTest KEY Operation startForced Defrosting Function For the R compartmentAlarm Function Communication Error Display FunctionWhen water supply is finished, in the ice maker test mode Display Function at PanelOperating Instructions & Installation Self-Diagnostics FunctionSelf-Diagnostics Checklist BAD Item Trouble StatusError DefrostingSensor of R CR SensorCF-FAN Error CR-FAN ErrorOn Error TroubleRelevant displays about load status is as follows Load Mode Checklist Load Item Load StatusLoad Condition Display Function Changing to Optional Mode Option Setting FunctionKEY Function Value ItemTemperature Change Table for the Freezer Compartment Change for freezer compartmentTemperature Change Table for the Refrigerator Compartment KEYCR Room Temperature Shift Function Case of basic model, the following items cannot be setMaker For Ice Maker Flow sensorDisassembly and Reassembly Removing the Front Leg Cover Door AssyRemoving the Freezer Door Removing the Refrigerator Door Liner on the right side of the rail To separate it Open the Fresh Select Zone DoorRemove two screws holding it to Reattaching the Freezer Door Reattaching the Refrigerator Door Levelling Open the Arctic Select Zone Door ZoneClose the filter cartridge cover Do not overtighten the compression Note nutWater line must be connected to drinkable water only Door Sub Parts Control PanelDoor Handle Door GasketRefrigerator Door Light Switch Refrigerator LightTempered Glass Shelf Plastic Drawers in the RefrigeratorFreezer Door Light Switch Freezer CompartmentsDoor Bin in Freezer Plastic Drawer in FreezerFreezer Light Ice Dispenser Ice MakerTighten the screws 2 of the ice maker support Auger Motor Case Upper DuctworkPartition in the Freezer Screws Pull the upper part of the evaporator cover slightlyEvaporator Fan Motor Evaporator in FreezerFreezer Thermistor Thermistor cover ScrewIce-Maker Thermistor Water TankEvaporator cover in the Refrigerator Evaporator Fan Motor in RefrigeratorEvaporator in Fridge Refrigerator ThermistorDuctwork Thermistor Thermistor cover Fresh /Arctic Select ZoneTM ThermistorUpper Ductwork Machine Compartment Electric Box PCB-MAIN AssySub-condenser Water SolenoidsRemoving the Arctic Select Zone Accessories If power is not on StartNormal Check at the Smps PBA Check Main PCB connectionIf the compressor doesn’t work normally Check connector for Contact failureExchange and repair COMP. Assembly Reference Perform forced defrosting for F R room one at a timeIf the ambient temperature sensor has trouble How To Check Temperature Sensing in the manualIf there is a trouble with self-diagnosissensor failure Check the soldering on the main PCB for Shorts & breaksAlarm Sounds continuouslyrelated to the buzzer If Ding-Dong sounds continuously StartIf Beep sounds continuously Start Gasket, food etcIf the buzzer doesn’t sound Main PCB is normal, buzzer is NormalBuzzer is broken - replace it Replace buzzer or panel PCBIt is a care Where the Panel PCB key isn’t selectedIf the panel PCB is not working normally If fan motor doesn’t working normaly Door S/WDoor Open 0V DC ConditionThese signals will be inputted into Micom Door Open DCIf Ice Cubed or/and Ice Crushed dont work normally If Indoor Lamp of Freezer/Refrigerator doesn’t light Replace Inside lamp Replace or troubleshoot Door S/WIf Water Drawer doesnt work normally Preliminary Check Replace connector Wire and switch Replace connector and wireIf Dispenser LED Lamp doesnt light Failure of panel PCB itselfWiring Diagram Connector Arrangement Main Board Circuitschematic Diagram Conn Ector Arrangement SMP S Board Power BUS A voltage proportional to98.9 93.7 40.0 88.9 38.2 84.2 36.4 79.8 34.6 75.7 32.8 71.868.2 64.7107 IC75 Input IC75 Output FAN#18 GND0.8V Motor Drive Circuit Descriptions Principle of OperationComparison in HIGH/LOW Speed RemarksXAA 13-2 Q & a Problem Possible Causes What To Do Reference InformationProblem Possible Causes What To Do Small or hollow cubesSuction Pipe Additional InformationCompressor Sub-condenser Hot Pipe Dryer Step valve Freezer Refrigerator
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