Motor Drive Circuit Descriptions, Remarks, High | Samsung RM255BABB

CIRCUIT DESCRIPTIONS

12-9. INTERNAL REFRIGERATOR FAN MOTOR OPERATING CIRCUIT

Impressed voltage on this part X3= motor operating voltage

MOTOR DRIVE CIRCUIT DESCRIPTIONS

1)This refrigerator uses BLDC MOTORS for the purpose of saving power consumption, the BLDC MOTOR is is used for the freezing compartment, cooling compartment, and machine room motor (this motor drive circuit is a common circuit used in other models)

2)PRINCIPLE OF OPERATION

In the above electric circuits, you may notice that the circuits are similar for each motor. For example, the F-FAN motor is represented here. FAN motor operates in high/low speed according to conditions. To operate the F-FAN, a certain voltage should be applied OP-AMP #13 PIN as shown in the Figure.

A certain voltage is applied OP-AMP #13 according to the operation of MICOM #37(HIGH RPM), #36(LOW PRM). Tripled by this voltage (Gain value currently set), you may get the voltage applied the motor.

If OP-AMP #13 PIN voltage is 3V, 9V is impressed into motor by 3V x 3 = 9V formula.

3)COMPARISON IN HIGH/LOW SPEED

	VOLTAGE APPLIED TO MOTOR				REMARKS

	F-FAN		R-FAN	C-FAN	In case of normal motor operation, a certain
HIGH	11.1V		9.7V	9.4V	frequency is input to MICOM #31(F), #30(R),
HIGH	11.1V		9.7V	9.4V	#29(C), and the MICOM checks out for any
					#29(C), and the MICOM checks out for any
					errors in motor operation based on this signal.
LOW	9.7V		9.7V	8.0V	errors in motor operation based on this signal.
LOW	9.7V		9.7V	8.0V	(Frequency (Hz) x 12 = Motor rpm)

* Voltage errors range within			0.2V.

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Samsung RM255BABB Motor Drive Circuit Descriptions, Principle of Operation, Comparison in HIGH/LOW Speed, Remarks, High

Contents

RM255BARB RM255BASB RM255BABB Authorized Training Center Campuses Important Safety Notice Contents Precautionssafety Warnings Symbols Forbidden Product Specifications Manual This operation instruction covers various models Model Specification RM25After packing 386lbs Sensor Electric Parts Specification Electric Components Specifications Model Dispenser Home BarItems Running Optional Material Specifications PhotographPart Code Operating Instructions & Installation Digital Panel Temperature Control Operation Power Freeze Operation Power Freeze and Power cool OperationPower cool Operation By in inside function irrespective of current setting Lock Function At Initial Power OnAble to operate on front panel Cube / Crushed / ICE OFF Selection Function Water Dispenser Function Machine Room F-Fan Motor Delay FunctionLight Operation Load Operation Condition Reverse rotation CCW Forward rotation CW Ice extraction Initial OperationHorizontal position Interval about 880ms Maximum torsion point Ice-Making Function Water Supply FunctionIce Extraction Function Water Supply Time Bold numerals indicate relevant ice tray steps Horizontality operation Defrosting period is fixed to 8 hours Defrosting FunctionArctic Zone 53.6 62.6 Function Arctic Select Zone FunctionOperation Fresh Select Zone Function Temp .8 ~ 44.6 of the Fridge compartment Function Operation SpecificationTest KEY Operation start For the R compartment Forced Defrosting Function Communication Error Display Function Alarm FunctionWhen water supply is finished, in the ice maker test mode Display Function at Panel Self-Diagnostics Function Operating Instructions & Installation BAD Item Trouble Status Self-Diagnostics Checklist Defrosting ErrorSensor of R CR Sensor CR-FAN Error CF-FAN ErrorOn Error Trouble Load Mode Checklist Load Item Load Status Load Condition Display FunctionRelevant displays about load status is as follows Option Setting Function Changing to Optional Mode Value Item KEY Function Change for freezer compartment Temperature Change Table for the Freezer Compartment KEY Temperature Change Table for the Refrigerator Compartment Case of basic model, the following items cannot be set CR Room Temperature Shift FunctionMaker For Ice Maker Flow sensor Disassembly and Reassembly Door Assy Removing the Front Leg Cover Removing the Freezer Door Removing the Refrigerator Door Open the Fresh Select Zone Door Remove two screws holding it toLiner on the right side of the rail To separate it Reattaching the Freezer Door Reattaching the Refrigerator Door Levelling Zone Open the Arctic Select Zone Door Do not overtighten the compression Note nut Water line must be connected to drinkable water onlyClose the filter cartridge cover Control Panel Door Sub PartsDoor Handle Door Gasket Refrigerator Light Refrigerator Door Light SwitchTempered Glass Shelf Plastic Drawers in the Refrigerator Freezer Compartments Freezer Door Light SwitchDoor Bin in Freezer Plastic Drawer in Freezer Ice Dispenser Ice Maker Tighten the screws 2 of the ice maker supportFreezer Light Upper Ductwork Auger Motor Case Screws Pull the upper part of the evaporator cover slightly Partition in the Freezer Evaporator in Freezer Evaporator Fan Motor Thermistor cover Screw Freezer ThermistorIce-Maker Thermistor Water Tank Evaporator Fan Motor in Refrigerator Evaporator cover in the Refrigerator Refrigerator Thermistor Evaporator in FridgeDuctwork Thermistor Thermistor cover Fresh /Arctic Select ZoneTM Thermistor Upper Ductwork PCB-MAIN Assy Machine Compartment Electric BoxSub-condenser Water Solenoids Removing the Arctic Select Zone Accessories Start If power is not onNormal Check at the Smps PBA Check Main PCB connection Check connector for Contact failure Exchange and repair COMP. AssemblyIf the compressor doesn’t work normally Perform forced defrosting for F R room one at a time Reference How To Check Temperature Sensing in the manual If the ambient temperature sensor has troubleIf there is a trouble with self-diagnosissensor failure Check the soldering on the main PCB for Shorts & breaks If Ding-Dong sounds continuously Start Alarm Sounds continuouslyrelated to the buzzerIf Beep sounds continuously Start Gasket, food etc Main PCB is normal, buzzer is Normal If the buzzer doesn’t soundBuzzer is broken - replace it Replace buzzer or panel PCB Where the Panel PCB key isn’t selected If the panel PCB is not working normallyIt is a care Door S/W If fan motor doesn’t working normalyDoor Open 0V DC Condition Door Open DC These signals will be inputted into Micom If Ice Cubed or/and Ice Crushed dont work normally Replace Inside lamp Replace or troubleshoot Door S/W If Indoor Lamp of Freezer/Refrigerator doesn’t light If Water Drawer doesnt work normally Preliminary Check Replace connector and wire Replace connector Wire and switchIf Dispenser LED Lamp doesnt light Failure of panel PCB itself Wiring Diagram Connector Arrangement Main Board Circuitschematic Diagram Conn Ector Arrangement SMP S Board A voltage proportional to Power BUS 93.7 40.0 88.9 38.2 84.2 36.4 79.8 34.6 75.7 32.8 71.8 98.968.2 64.7 IC75 Input IC75 Output FAN #18 GND0.8V107 Principle of Operation Motor Drive Circuit DescriptionsComparison in HIGH/LOW Speed Remarks XAA Reference Information 13-2 Q & a Problem Possible Causes What To Do Small or hollow cubes Problem Possible Causes What To Do Additional Information Compressor Sub-condenser Hot Pipe Dryer Step valveSuction Pipe Freezer Refrigerator