Kenmore 795.775736, 795.775796, 795.775726, 795.775696, 795.775636 User Manual

R

REFRIGERATOR

SERVICE MANUAL

CAUTION

BEFORE SERVICING THE UNIT,

READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

Model #s:

795.77562600

795.77569600

795.77564600

795.77563600

795.77572600

795.77579600

795.77573600

P/No. 3828JL8091A (Last Revision: March. 28. 2008)

CONTENTS

Safety Precautions

1.Specification .........................................................................................................................................................................

2.Parts Identification ...............................................................................................................................................................

3.Operation ..............................................................................................................................................................................

3-1. Explanation of Each Function .........................................................................................................................................

3-2. Ice Maker Function..........................................................................................................................................................

4.Wiring Diagram .....................................................................................................................................................................

5.Adjustment............................................................................................................................................................................

5-1. Compressor.....................................................................................................................................................................

5-2. Positive Temperature Coefficient (PTC) – Starter ...........................................................................................................

5-3. Over Load Protector (OLP) .............................................................................................................................................

5-4. Remove the cover Positive Temperature Coefficient (PTC)

6.Troubleshooting ...................................................................................................................................................................

6-1. Error Mode Summary......................................................................................................................................................

6-2. Troubleshooting With Error .............................................................................................................................................

6-3. Troubleshooting Else ......................................................................................................................................................

7.Component Testing Information .........................................................................................................................................

7-1. Defrost Controller Assembly ...........................................................................................................................................

7-2. Sheath Heater .................................................................................................................................................................

7-3. Door Heater Assembly ....................................................................................................................................................

7-4. Switch (F, R)....................................................................................................................................................................

7-5. Solenoid ..........................................................................................................................................................................

7-6. AC Motor Assembly ........................................................................................................................................................

7-7. Damper ...........................................................................................................................................................................

7-8. Lamp Socket ...................................................................................................................................................................

8.Disassembly Instructions ....................................................................................................................................................

9.PCB Assembly ......................................................................................................................................................................

10.Exploded View ....................................................................................................................................................................

SAFETY PRECAUTIONS

Please read the following instructions before servicing your refrigerator.

1.Unplug the power before handling any elctrical componets.

2.Check the rated current, voltage, and capacity.

3.Take caution not to get water near any electrical components.

4.Use exact replacement parts.

5.Remove any objects from the top prior to tilting the product.

- 2 -

1. SPECIFICATIONS

1-1 DISCONNECT POWER CORD BEFORE SERVICING

IMPORTANT – RECONNECT ALL GROUNDING DEVICES

All parts of this appliance capable of conducting electrical current are grounded. If grounding wires, screws, straps, clips, nuts or washers used to complete a path to ground are removed for service, they must be returned to their original position and properly fastened.

1-2 IMPORTANT NOTICE

This information is intended for use by individuals possessing adequate backgrounds of electrical, electronic and mechanical experience. Any attempt to repair a major appliance may result in personal injury and property damage. The manufacturer or seller cannot be responsible for the interpretation of this information, nor can it assume any liability in connection with its use.

1-3 ELECTRICAL SPECIFICATIONS

Temperature Control (F		) ...-6°F to +8°F
Defrost Control...................	Total Comp Running Time 7 hrs
Defrost Thermostat .......................................................		46°F
Electrical Rating : 115VAC, 60Hz.................................		1-5 A
Maximum Current Leakage.......................................		0.5 mA
Maximum Ground Path Resistance ....................		0.14 Ohms
Energy Consumption .....	25 cu.ft. 579 kWh/yr (Energy Star)

1-4 NO LOAD PERFORMANCE CONTROL POSITION: MID/MID

And Ambient of: ..................	70°F..................................	90°F
Fresh Food, °F....................	33°F to 41°F.........	33°F to 41°F
Frozen Food, °F..................	-4°F to +4°F ..........	-4°F to +4°F
Percent Running Time ........	35%-45% .................	50°F-70°F

1-5 REFRIGERATION SYSTEM

Minimum Compressor Capacity Vacuum	............... 21 MIN.
Minimum Equalized Pressure
@ 70°F .......................................................	49 PSIG
@ 90°F .......................................................	56 PSIG
Refrigerant R134a .................................................	4.41 oz.
Compressor .....................................................	956 BTU/hr

1-6 INSTALLATION

Clearance must be provided at top, sides and rear of the

refrigerator for air circulation.
AT TOP .........................................................................	2 in
AT SIDES ......................................................................	1 in
AT REAR ......................................................................	1 in

1-7 REPLACEMENT PARTS

Relay..............................................................	6748C-0004D
Overload ........................................................	6750C-0004R
Defrost Thermostat........................................	6615JB2005H
Defrost Heater ...............................................	5300JK1005D
Evaporator Fan Motor....................................	4681JK1004E
Capacitor (Running) .....................................	0CZZJB2014B
	*0CZZJB2012H
	*0CZZJB2012K
Compressor (Hi-Side) ...................................	TCA31748001
Evaporator (Lo-Side)......................................	5421JJ1007A
Condenser......................................................	5403JJ1004B
Dryer..............................................................	5851JA2002P
Condenser Fan Motor ...................................	4681JB1029D
Temperature Control ..............................	3551JA1132L(SW)
	3551JA1132M(ST)
	3551JA1132N(WB)
	3551JA1132P(BI)
Main Control....................................................	EBR3491102
Ice Fan Motor ................................................	4681JB1029E
*OPTIONAL

1-8 AIR FLOW / CIRCULATION D’AIR

EVAPORTOR FAN MOTOR

CONDENSER FAN MOTOR

ICE

ROOM

- 3 -

2. PARTS IDENTIFICATION

F	P
B	O
A	Q
N	C
C
M

	H
D	G

E
L	J
I	K

	A	I	Basket	Ice Bank
	B Filter (Inside)	J	Durabase
	C Modular Door Bins	K	Divider	Ice Door
	D Refrigerator Shelves	L	Ice Bin
	E Supra Fresh Crisper with	M	Water Tank Cover
	Tilt-Out Compartment	N	Snack Pan
	F Ice Room	O	Egg Box
	(ICEMAKER and ICE BIN)	P	Dairy Bin
	G Pull out Drawer
		Q Bottle Holder
	H Turbo Motor

- 4 -

3. OPERATION

3-1. Explanation Of Each Function

1. Function

(1)When the appliance is plugged in, it is set to 37 °F for the refrigerator and 0 °F for the freezer.

You can adjust the refrigerator and the freezer control temperature by pressing the ADJUST button.

(2)When the power is initially applied or restored after a power failure, maintains its previously set temperature.

	Refrigerator	Ultra lce
		Filter Reset

.

2 How to Toggle the Display between °F and °C

(1)The initial setting is °F and the display temperature mode can be changed from °F to ° C or ° C to ° F by pressing and holding the FRZ TEMP and the REF TEMP keys at the same time for over 5 seconds.

3. Lock function (dispenser and display button lock)

(1)When the refrigerator is first turned on, the buttons are not locked. The display panel shows the padlock unlocked icon.

(2)To lock the display, the dispenser, and the control panel, press and hold the LOCK button for 3 seconds. The locked pad lock icon is displayed.

(3)The LOCK button is the only control feature that remains active in the locked state. The buzzer sound, other control buttons, and the dispenser are deactivated.

(4)To release from the locked state, press and hold the LOCK button again for 3 seconds.

Press & Hold	Press & Hold
Ex) In selecting	Ex) In selecting
"LOCK"	"LOCK" again

4. Filter condition display function

(1) There is a replacement indicator icon for the filter cartridge on the dispenser.

(2)The water filter should be replaced approximately every six months.

(3)The water filter icon will turn on every six months to remind you to replace.

(4)After replacing the filter, press and hold the lock button more than 3 seconds.

This will turn off the reminder icon and reset the timer.

	Classification	In initial Power On	Replace indicator
		/ Filter RESET	light on
	Filter Status
	Display
		Press & Hold	Press & Hold

- 5 -

5. Ice Plus Selection

Please select this function for quick freezing.

(1)The ICE PLUS option starts counting its 24-hours period every time the button is pressed.

(2)The ICE PLUS function automatically turns off after twenty-four hours pass.

6. Dispenser Use Selection

You can select water or ice.

Select water, crushed ice, or ice cubes by cycling through the selections when pressing the DISPENSER button,

Hold your cup in the dispenser for a few seconds after dispensing

ice or water to allow the last pieces of ice or drops of water to fall into the cup.

7. Dispenser Light

Whenever the light button is pressed, the display changes as shown below.

Light Sensor

Auto

Auto

on

Pressing

Switch

Normal status: When dispenser is operated, DISPENSER LIGHT is ON.

AUTO status: Detecting the lighting of room by LIGHT SENSOR, DISPENSER LIGHT is on and off automatically. ON status: DISPENSER LIGHT is on continuously.

8. Control Of Freezer Fan Motor

(1)Freezer fan motor has high and standard speeds.

(2)High speed is used at power-up, for Ice Plus, and when refrigerator is overloaded. Standard speeds is used for general purposes.

(3)To improve cooling speed, the RPM of the freezer fan motor changes from normal speed to high.

(4)High speed (2700RPM) : Initial power on or load corresponding operation, Ice Plus Normal speed (2400RPM) : General working conditions.

(5)Fan motor stops when a refrigerator or freezer door opens.

9. Cooling Fan Motor

(1)The cooling fan is switched ON and OFF in conjunction with the compressor.

(2)The cooling fan runs at a single speed.

(3)The Failure sensing method is the same as in the fan motor of the freezing fan motor(refer to failure diagnosis function table for failure display).

10. Icing Fan

The Icing Fan is controlled by the the sensor on the top of the ice room. The Failure sensing method is the same as in the fan motor of the freezer (refer to failure diagnosis function table for failure display)

- 6 -

11. Ice Plus

(1)The purpose of this function is to intensify the cooling speed of freezer and to increase the amount of ice.

(2)Whenever selection switch is pressed, selection/release, the LED will turn ON or OFF.

(3)If there is a power outage and the refrigerator is powered on again, Ice Plus will be canceled.

(4)To activate this function, press the Ice Plus key and the LED will turn ON. This function will remain activated for 24 hours. The first three hours the compressor and Freezer Fan will be ON. The next 21 hours the freezer will be controlled at the lowest temperature. After 24 hours or if the Ice Plus key is pressed again, the freezer will return to its previous temperature.

(5)During the first 3 hours:

•Compressor and freezer fan (HIGH RPM) run continuously.

•If a defrost cycle begins during the first 90 minutes of Ice Plus, the Ice Plus cycle will complete its cycle after defrosting has ended.

If the defrost cycle begins when Ice Plus has run for more than 90 minutes, Ice Plus will run for two hours after the defrost is completed.

•If Ice Plus is pressed during defrost, Ice Plus LED is on but this function will start seven minutes after defrost is completed and it shall operate for three hours.

•If Ice Plus is selected within seven minutes after compressor has stopped, the compressor (compressor delays seven minutes) shall start after the balance of the delay time.

•The fan motor in the freezer compartment runs at high speed during Ice Plus.

(6)For the rest of the 21 hours, the freezer will be controlled at the lowest temperature.

12. Freezer and Refrigerator Lamp Auto Off

(1) To avoid heat damage caused by the lamp, it is turned off automatically when the refrigerator door is open for more than 7 minutes.

13. Alarm for Open Door

(1) This feature sounds a buzzer when the freezer or refrigerator door is not closed within 1 minute after it is opened.

(2 One minute after the door is opened, the buzzer sounds three times each for one half seconds. These tones repeat every

30seconds.

(3)The alarm is cancelled when the freezer or the refrigerator is closed.

Freezer Door Closed Open	Closed Open									Closed
or Refrigerator
Door		3 Times 3 Times 3 Times 3 Times
Buzzer
				30 sec 30 sec 30 sec
Within 1 min.
		1 min.

- 7 -

14. Defrosting (removing frost)

(1)Defrosting starts each time the COMPRESSOR running time reaches 7 hours.

(2)For initial power on or for restoring power, defrosting starts when the compressor running time reaches 4 hours.

(3)Defrosting stops if the sensor temperature reaches 46.4°F (8°C) or more. If the sensor doesn’t reach 46.4°F (8°C) in 2 hours, the defrost mode is malfunctioning. (Refer to the defect diagnosis function, 15.)

(4)Defrosting won’t function if its sensor is defective (wires are cut or short circuited)

15. Defect Diagnosis Function

(1)Automatic diagnosis makes servicing the refrigerator easy.

(2)When a defect occurs, the buttons will not operate; but the tones will sound.

(3)When the defect CODE removes the sign, it returns to normal operation (RESET). (4 The defect CODE shows on the Refrigerator and Freezer Display.

	Auto
	on
Press & Hold	Press & Hold

LED check function: Press Ice Plus and Freezer buttons for a second, display LED graphics on. If releasing the button, the LED graphic displays the previous status.

- 8 -

3-2. Ice Maker Function

1. Operation Principle of icemaker

Power On

Start Position

Icemaking

Mode

Harvest

Mode

Park Position

Fill

Test Mode

•Adjusts EJECTOR to Start Position with power on.

•Waits until water becomes ICE after starting the icemaking operation.

•Runs MOTOR to drop ice from the tray into the ICE BIN. (During harvest mode, check if the ice bin is full.)

•Reaches Start Position

•Performs Ice Making Mode after supplying water by operating the SOLENOID in ICE VALVE.

•To operate LINE and SERVICE, press and hold the Cube Size button for 3 seconds. The icemaker will run through 3 stages:

HarvestFillIcemaking.

(1)Turning the Icemaker stop switch off (O) stops the ice making function.

(2)Setting the Icemaker switch to OFF and then turning it back on will reset the icemaker control.

			EJECTOR
			Automatic
	Cube Size	Cube Size	Shut off Arm
	Indicator Light		Power
		Selection Button	Switch

- 9 -

2. Icemaking Mode

(1)Icemaking refers to the freezing of supplied water in the ice tray. Complete freezing is assured by measuring the temperature of the tray with Icemaking SENSOR.

(2)Icemaking starts after completion of the water fill operation.

(3)The icemaking function is completed when the sensor reaches 1 9 ° F (-7 ° C), 55 minutes after starting. NOTE : After the icemaker power is ON, the icemaker heater will be on for test for 6 seconds.

3. Harvest Mode

(1)Harvest (Ice removing) refers to the operation of dropping cubes into the ice bin from the tray when icemaking has completed.

(2)Harvest mode:

•The Heater is ON for 30 seconds, then the motor starts.

•The feeler arm senses the quantity of ice in the ice storage bin while rotating with the EJECTOR.

A.Ice storage bin is full : The EJECTOR stops (heater off).

B.Ice storage bin is not full : The EJECTOR rotates twice to open for ice.

*If the EJECTOR does not rotate once within 5 minutes in B mode, separate heater control mode starts operating to prevent the EJECTOR from being constrained. (It is recommended that the user open for ice to return to normal mode.)

4. Fill/Park Position

(1)Once a normal harvest mode has been completed, the water solenoid will be activated.

(2)The amount of water is adjusted by pressing the fill key repeatedly. This changes the time allowed for fill as illustrated in the table below.

Water supply amount TABLE

STAGE	TIME TO SUPPLY	INDICATIONS								REMARKS
1	5 sec.									The water amount will vary depending
2	5.5 sec.
										on the water control switch setting as
	(FIRST STAGE)									well as the water pressure of the
										connected water line.
3	6 sec.

- 10 -

5. Function TEST

(1)This is a forced operation for test, service, cleaning, etc. It is operated by pressing and holding the cube size button for 3 seconds.

(2)The test works only in the Icemaking Mode. It cannot be entered from the Harvest or Fill mode.

(3)Caution! Caution! Caution! Caution! If the test is performed before water in the icemaker is frozen, the ejector will pass through the water. When the fill mode begins (Stage 4), unless the water supply has been shut off, added water will overflow into the ice bin. If the control doesn ’ t

(4)After water is supplied, the normal CYCLE is followed: icemaking → Harvest → Park Position → Fill.

(5)Five seconds after Stage 5 is completed, the icemaker returns to MICOM control. The time needed to supply water resets to the

Diagnosis TABLE

STAGE

ITEMS

INDICATOR

REMARKS

Five seconds after the heater starts, it

1

HEATER

will go off if the temperature by

sensor is higher than 10°C

2

MOTOR

Five seconds after the heater starts, you

can confirm that the motor is moving.

HALL IC I

Check whether ice bin is full. If the ice bin

3

if full, the motor and heater are off, but on

standby until the ice bin is empty.

4

HALL IC II

You can confirm HALL IC detection of start

position.

5

VALVE

Two seconds after the detection of start

position, you can confirm that the valve is on.

6

Reset

Return to Status prior to

Five seconds after the fifth stage is

completed, the icemaker resets to initial

TEST MODE

status.

6. Error codes shown on the icemaker water supply control panel

NO

DIVISION

INDICATOR

CONTENTS

REMARKS

1

Normal

Mark time to

None

Display switch

supply

operates properly

2

Icemaking

Open or short-circuited wire

Make sure that the wire

sensor

on each sensor is

malfunction

connected.

- 11 -

4. WIRING DIAGRAM

- 12 -

5. ADJUSTMENT

5-1. Compressor

1.Role

The compressor intakes low temperature and low pressure gas from the evaporator of the refrigerator and compresses this gas to high-temperature and high-pressure gas. It then delivers the gas to the condenser.

2.Composition

The compressor includes overload protection. The PTC starter and OLP (overload protector) are attached to the outside of the compressor. Since the compressor is manufactured to tolerances of 1 micron and is hermetically sealed in a dust and moisture-free environment, use extreme caution when performing repairs.

3.Note for usage

(1)Be careful not to allow over-voltage and over-current.

(2)If compressor is dropped or handled carelessly, poor operation and noise may result.

(3)Use proper electric components appropriate to the particular compressor in your product.

(4)Keep the compressor dry. If the Compressor gets wet (in the rain or a damp environment) and rust forms in the pin of the Hermetic Terminal, poor operation and contact may result.

(5)When replacing the compressor, be careful that dust, humidity, and soldering flux don’t contaminate the inside of the compressor. Dust, humidity, and solder flux may contaminate the cylinder and may cause noise, improper operation, or even lock up.

- 13 -

4. diagnosis

1		Power Source.

2Check resistance of Motor Compressor.

Check

3resistance of PTC-Starter.

4Check OLP.

Remove PTC-Starter		(Rated Voltage	YES
				2
from Compressor and	±10%)?

measure voltage between Terminal C of Compressor and Terminal 5 or 6 of PTC.

	OLP disconnected?	YES	5
No Voltage.		Replace OLP.

NO	Check connection
	condition.
	Reconnect.

		Applied voltage isn't				Advise customer that		5
		in acceptable range.				power supply needs to be
		(115V ±10%)				checked by an electrician.

Check resistance between M-C, S-C and M-S in Motor Compressor.

Check resistance of two terminals in PTC-Starter.

Check resistance of two terminals in OLP.

The range of resistance is between 1~50Ω (ok)

			3
Open or short Replace
Compressor.	3	4	5

Reference 5-2

Reference 5-3

5Check starting state.

Check the power supply under load. (Compressor attempting to re-start after being off for 5 minutes).

		YES			YES		Compressor
	Supply			Did			is OK
	voltage rating			compressor
	with ±10%.			start?
							Replace the
					NO		compressor

NO	1

- 14 -

5-2. Positive Temperature Coefficient (PTC) – Starter

1. Composition

(1) PTC (Positive Temperature Coefficient) is a no-contact semiconductor starting device which uses ceramic material consisting of BaTiO3.

(2) The higher the temperature is, the higher the resistance value. These features are used as a starting device for the motor.

2. Role

(1) The PTC is attached to the sealed compressor and is used for starting the compressor motor.

(2) The compressor is a single-phase induction motor. For starting operation, the PTC allows current flow to both the start winding and main winding.

3. PTC – Applied circuit diagram ● Starting Method for the Motor

	OVERLOAD PROTECTOR	LFX21960**	3	2	5	6
		LFX25960**	2	3	6	5

N

C

	PTC	COMPRESSOR
	2	MOTOR
	S	M
		S	M
	L1
	PTC STARTER	SEALED
		TERMINAL
	Resistance Starter Capacitor Running

4. Motor restarting and PTC cooling

(1) It requires approximately 5 minutes for the pressure to equalize before the compressor can restart.

(2) The PTC device generates heat during operation. Therefore, it must be allowed to cool before the compressor can restart.

5. Relation of PTC – Starter and OLP

(1)If the compressor attempts to restart before the PTC device is cooled, the PTC device will allow current to flow only to the main winding.

(2)The OLP will open because of the over current condition. This same process will continue (3 to 5 times) when the compressor attempts to restart until the PTC device has cooled. The correct OLP must be properly attached to prevent damage to the compressor. Parts may appear physically identical but could have different electrical ratings. Replace parts by part number and model number. Use only approved substitute parts.

6. Note for Using the PTC-Starter

(1)Be careful not to allow over-voltage and over-current.

(2)Do not drop or handle carelessly.

(3)Keep away from any liquid. If liquid such as oil or water enters the PTC, the materials may fail due to breakdown of their insulating capabilities.

(4)If the exterior of the PTC is damaged, the resistance value may be altered. This can cause damage to the compressor and result in a no-start or hard-to-start condition.

(5)Always use the PTC designed for the compressor and make sure it is properly attached to the compressor. Parts may appear physically identical but could have different electrical ratings. Replace parts by part number and model number. Use only approved substitute parts.

-15 -

5-3. Over Load Protector (OLP)

1. Define

(1)The OLP (OVERLOAD PROTECTOR) is attached to the Compressor and protects the motor by opening the circuit to the motor if the temperature rises and activating the bimetal spring in the OLP.

(2)When high current flows to the compressor motor, the Bimetal works by heating the heater inside the OLP, and the OLP protects the Motor by cutting off the current flowing to the Compressor Motor.

2. Role

(1)The OLP is attached to the sealed compressor used for the refrigerator. It prevents the motor coil from being started in the compressor.

(2)For normal operation of the OLP, do not turn the adjustment screw of the OLP in any way.

(OVERLOAD PROTECTOR cross section)

	12345678
330 FBYY	-S1 BOX98

Electrical characteristics part number

Customer part number

Lot code/ date code

Physical termination part number

Part

No. Name

Base, phenolic (UL 94 V-0 rated)

Movable arm support, plated steel

Stationary contact support, plated steel

Heater support, plated steel

Heater, resistance alloy

Disc, thermostatic alloy

Movable arm, spring temper copper alloy

Contact, movable, silver on copper

Contact, stationary, silver on copper

Slug, plated steel

Cover, polyester (UL 94 V -0 rated)

Pin connector, plated copper alloy (To engage 2.33/2.66 mm dia. pin) Quick-connect terminal, brass, conforms to UL 310, MEMA

DC-2, DIN 46344

5-4. Remove the cover Positive Temperature Coefficient (PTC)

(1)Remove the cover of the mechanical area.

(2)Disconnect the two clamps holding

the compressor in place.

(3) Loosen two screws on compressor base.

(4)Use a screwdriver to pry off the cover.

(5)Assembly is the reverse order of disassembly.

1

3

2

- 16 -

6. TROUBLESHOOTING

6-1. Error Code Summary

wWARNING : When you check the Resistance values, be sure to turn off the power. And wait for the voltage-discharge sufficiently.

			Error Display
		Error Detection			Error Generation Factors	Remark
	NO		Freezer	Ref.
		Category
			Temperature	Temperature
	1	Normality			None	Normal operation of Display
	2	Freezer Sensor	Er	FS	Short or Disconnection
		Error			of Freezer Sensor
	3	Refrigerator	Er	rS	Short or Disconnection
		Sensor Error			of Refrigerator Sensor	Check each sensor and its
						connector.
	4	Defrosting	Er	dS	Short or Disconnection
		Sensor Error			of Defrosting Sensor
	5	Icing Sensor	Er	IS	Short or Disconnection
					of Icing Sensor
		Error
					Even though it is passed
					1 hour since then	Temperature Fuse
	6	Poor Defrosting	Er	dH	Defrosting , if Defrosting	Disconnection, Heater
					sensor is not over 8°C, it	disconnection, DRAIN Jam,
					is caused	Poor Relay for Heater
					It is caused when	Poor BLDC Motor
		Abnormality of			feedback signal isn’ t	connection, DRIVE IC, and
	7	BLDC FAN Motor	Er	IF	over 115	TR Tx/Rx between icemaker
		for Ice Making			seconds during BLDC	and main board.
					FAN motor operating
					It is caused when	Poor BLDC Motor
		Abnormality of			feedback
						connection, DRIVE IC, and
	8				signal isn’ t over 115
		BLDC FAN Motor	Er	FF		TR Tx/Rx between icemaker
					seconds during BLDC
		for Freezer				and main board.
					FAN motor operating
		Abnormality of			It is caused when	Poor BLDC Motor
	9				feedback	connection, DRIVE IC, and
		BLDC FAN Motor	Er	CF	signal isn ’ t over 115	TR Tx/Rx between icemaker
		for Mechanic Room			seconds during BLDC	and main board.
					FAN motor operating
					Communication Error	Poor Communication
		Communication				connection,Poor TR of
	10		Er	CO	between Micom of Main	Transmitter and Receiver
		Error
					PCB and Display Micom	Tx/Rx between icemaker
						and main board.

- 17 -

6-2. Troubleshooting With Error

Freezer Sensor Err or

Is Er-FS dis played?

Yes

Is the connection loose?	Yes	Reconnect

	Disconnect CON6 and measure
				No	Replace
	the value. Is resistance value				F-sensor
	between pins 11 & 12 of CON6
	as below? (BL to BL)
			pin11 pin12

Test Point	Result
pin11 to pin12	1.4 ~ 120k‰

No

No

Reconnect CON6 and Power ON

Power Off

Tip : To protection of MICOM

If the ER-FS appears, Replace the main PCB. Otherwise, explain to the customer!

- 18 -

Refrigerator Sensor Error

Wiring dia gram

Is Er-rS displayed?

Yes
Is the connection loose?	Yes	Reconnect

Disconnect CON6 and measure

the value. Is resistance value No between pins 9 & 10 of CON6 as below? (WH to WH)

pin9 pin10

No

Power Off

Tip : To protection of MICOM

Tpin10 pin9	Result
pin9 to pin10	6 ~ 300 k‰

No

Reconnect CON6 and Power ON

If the ER-rS appears, Replace the main PCB. Otherwise, explain to the customer!

Replace

R-sensor

- 19 -

Defrost Sensor Error

CON6											D-Sensor
			BO						BO
Main PCB	7			6		1
			BO						BO
	8			7		2

Housing-A

Wiring dia gram

Is Er-dS displayed?

Yes

Is the connection loose?	Yes

No

Power Off

Tip : To protection of MICOM

Disconnect CON6 and measure

the value. Is resistance value No between pins 7 & 8 of CON6 as below? (BO to BO)

pin7 pin8

Reconnect

Replace

D-sensor

Is resistance value between		Replace a
pins 1 & 2 of Housing- A as	No	D-Sensor
below? (BO to BO)

pin2 pin1

Checking Open or Short of wire

Test Point	Result
Pin1 To pin2	1.156 ~141.5k‰

Yes

Reconnect and Power ON

If the ER-dS appears, Replace the main PCB. Otherwise, explain to the customer!

	Test Point		Result
	Pin7 to pin8		6 ~ 300k‰
	No

- 20 -

Icing Room Sensor Error

CON101

Display 1

PCB 2

Icing-Sensor

BL	1	1	BL
BL	2	2	BL
	Housing-A

Wiring diagram

Is Er-IS displayed?

Yes
Is the connection loose?		Yes	Reconnect
Display PCB	Inner of Icing door

No
Disconnect CON101 and
	Replace
measure the value. Is resistance No	Main PCB
value between pins 1 & 2 of
CON101 as below? (BL to BL)
pin2 BL
pin1 BL

Icing room Sensor Resistance

Test Point

Result

pin1 to pin2 1.156 ~141.5k‰

Is resistance value between	No	Replace the
pins 1 & 2 of Housing- A as		Icing-Sensor
below? (BL to BL)

pin1 BL pin2 BL

Checking Open or Short of wire

Test Point		Result
(1) To (2)		1.4 ~120k‰
	Yes

Reconnect and Power ON

If the ER-IS appears, Replace Main PCB Otherwise, explain to the customer!

Yes

- 21 -

Defrost Heater Error

D-Sensor				6 1	BL

BO			BO			WH	7	BN	FUSE-M
	1	6	7	Main		10		2
BO			BO			BL
	2	7		PCB				BK	DEF-Heater
			8			4
								1
	Housing-A			CON6	CON3			2
								BK
					Wiring dia gram			3

Is Er-dH displayed?

Yes

Is the connec tion loose?

Enter the TEST 3 MODE

Is the voltage value between pins 10 (WH) and 4 (BL) of CON3 115 V AC?

pin10 WH pin4 BL

Yes Reconnect

Relay operation

Test Point	Result
pin4 To pin 10	115V

Yes

Reset TEST3 MODE(Normal) CON6 Is the voltage value between

pins 10 (WH) and 4 (BL) of CON3 for 0 V AC?

					pin10 WH
					pin4 BL
	CON3
	No	Relay Open
		Test Point			Result
		Reset/Norm op			0 ~ 2 V

Replace

Yes MAIN PCB

Replace

No MAIN PWB

Yes

- 22 -

	Is the resistance value	Yes	Normal
	between pins 10(WH)
	And 4(BL) of CON3
	like as below?

						pin10 WH
						pin4 BL
	Resistance
	Test Point					Ressult
	(1) To (2)			34 ~ 42 Ω
	No
Is the connection loose?
						Yes		Reconnect

	No
	Is the resistance value	No	Replace
			Fuse-M
	of Fuse –M like
	as below?

(1)BL

(2)BN

Open or Short of Fuse-M

Test Point	Ressult
(1) To (2)	0 Ω

Yes

	Is the resistance value of	No	Replace
			Heater
	heater like as below?

				(1) (2)
		Heater Resistance
		Test Point		Ressult
		(1) To (2)		34 ~ 42 Ω
		Yes
	Is the resistance			No	Replace
					DEF-sensor
	value of DEF-sensor like
	as below? It depends on
	the temperature.

(1) BO

(2) BO

Defrost Sensor Resistance

Test Point	Result	Test Point	Result
-30°C	129.3 kΩ	10°C	19.53 kΩ
-20°C	76.96 kΩ	20°C	13.03 kΩ
-10°C	47.34 kΩ	30°C	8.896 kΩ
0°C	30 kΩ	40°C	6.201 kΩ

Yes

Explain to the customer! :

It can be occurred, when the gasket is not stuck to product or when you put the high temperature loads (hot foods) a lot

in the product.

- 23 -

Freezer Fan Error

	WH	1	1	BK
	1
Main	BK	2	2	RD	F-FAN
	2
PCB	PR			PR
		3	3
	3

CON4	Housing

Wiring diagram

Is Er-FF displayed?

Yes
Is the connection loose? Yes	Reconnect

	No
	Reset and
		No	Replace
	Enter the TEST 1 MODE
			Main PCB
	Is the output voltage between
	pin1 and pin2 of
	CON4 like as below?
	Pin1 WH Pin2 BK

Freezer Fan Voltages

Test Point		Ressult
pin1 to pin2		12 ~ 16 V
Yes

	Does the cold-air come out			No	Check fan motor
	of the top of the main duct?				(Connector,
					Frozen,Locked)

	Yes
	Is the feedback voltage
				No	Replace
	between pin2 and pin3 of
					Main PCB
	CON4 like as below?
	(from motor to main board)
			Pin2 BK
			Pin3 PR

Feedback Voltages

Test Point	Ressult
pin2 to pin3	1 ~ 4 V

Yes

Explain to the customer!

- 24 -