Kenmore 795 71303 902 Page 16
Workshop Manuals
4-1 COMPRESSOR4-1 COMPRESSOR
4-1-1 Role4-1-1 Role
The compressor intakes low temperature and low The compressor intakes low temperature and low
pressurepressure
gas from the evaporator of the refrigerator and gas from the evaporator of the refrigerator and
compressescompresses
this gas to high-temperature and high-pressure gas. It thenthis gas to high-temperature and high-pressure gas. It then
delivers the gas delivers the gas
to the condenser.to the condenser.
4-1-2 Composition4-1-2 Composition
The compressor includes overload protection. The PTCThe compressor includes overload protection. The PTC
starter and OLP (overload protector) are attached to thestarter and OLP (overload protector) are attached to the
outside of the compressor. Since the compressor isoutside of the compressor. Since the compressor is
manufactured to tolerances of 1 micron and manufactured to tolerances of 1 micron and
is hermeticallyis hermetically
sealed in a dust and moisture-free environment, usesealed in a dust and moisture-free environment, use
extreme caution when repairing it.extreme caution when repairing it.
4-1-3 Note for Usage4-1-3 Note for Usage
(1) Be careful not to allow (1) Be careful not to allow
over-voltage and over-current.over-voltage and over-current.
(2) If compressor (2) If compressor
is dropped or is dropped or
handled carelesslyhandled carelessly
, poor, poor
operation and noise may result.operation and noise may result.
(3) Use proper electric components appropriate to (3) Use proper electric components appropriate to
thethe
Particular Compressor in your product.Particular Compressor in your product.
(4) Keep (4) Keep
Compressor dryCompressor dry
..
If the Compressor gets wet (in the rain or a dampIf the Compressor gets wet (in the rain or a damp
environment) and rust forms in the environment) and rust forms in the
pin of the Hermeticpin of the Hermetic
TT
erminal, poor operation erminal, poor operation
and contact and contact
may result.may result.
(5) When replacing (5) When replacing
the Compressorthe Compressor
, be careful that , be careful that
dust,dust,
humidityhumidity
, and soldering flux , and soldering flux
don’t contaminate don’t contaminate
the insidethe inside
of the compressor. Dust, humidity, and solder fluxof the compressor. Dust, humidity, and solder flux
contaminate the cylinder and may cause contaminate the cylinder and may cause
noise,noise,
improper operation or even cause it to lock up.improper operation or even cause it to lock up.
4-2 PTC-STARTER4-2 PTC-STARTER
4-2-1 Composition of PTC-Starter4-2-1 Composition of PTC-Starter
(1) PTC (1) PTC
(Positive T(Positive T
emperature Coefficient) is a emperature Coefficient) is a
no-contactno-contact
semiconductor starting device which uses ceramicsemiconductor starting device which uses ceramic
material consisting of BaTiO3.material consisting of BaTiO3.
(2) The higher the temperature is, the higher the resistance(2) The higher the temperature is, the higher the resistance
value. These features are used as a svalue. These features are used as a s
tarting device fortarting device for
the Motor.the Motor.
4-2-2 Role of PTC-Starter4-2-2 Role of PTC-Starter
(1) The PTC is attached to the Sealed (1) The PTC is attached to the Sealed
Compressor and isCompressor and is
used for starting the Motor.used for starting the Motor.
(2) The compressor (2) The compressor
is a single-phase is a single-phase
induction motorinduction motor
..
Durign the starting operation, the PTC allows currentDurign the starting operation, the PTC allows current
flow to both the start winding and main winding.flow to both the start winding and main winding.
4-2-3 PTC-Applied Circuit Diagram4-2-3 PTC-Applied Circuit Diagram
Starting Method for the MotorStarting Method for the Motor
4-2-4 Motor Restarting and PTC Cooling4-2-4 Motor Restarting and PTC Cooling
(1) It requires approximately 5 minutes for the press(1) It requires approximately 5 minutes for the press
ure toure to
equalize before the compressor can restart.equalize before the compressor can restart.
(2) The PTC device generates heat during operation.(2) The PTC device generates heat during operation.
Therefore, it must be allowed to cool before theTherefore, it must be allowed to cool before the
compressor can restart.compressor can restart.
4-2-5 Relation of PTC-Starter and OLP4-2-5 Relation of PTC-Starter and OLP
(1) If the compressor attempts to restart before the P(1) If the compressor attempts to restart before the P
TCTC
device is cooled, the PTC device device is cooled, the PTC device
will allow current towill allow current to
flow only to the main winding.flow only to the main winding.
(2) The OLP will open because of the over curr(2) The OLP will open because of the over curr
entent
condition. This same process will continue (3 to 5condition. This same process will continue (3 to 5
times) when the compressor attempts to restart times) when the compressor attempts to restart
untiluntil
the PTC device has cooled. The correct OLP must the PTC device has cooled. The correct OLP must
bebe
properly attached to prevent damage to theproperly attached to prevent damage to the
compressor.compressor.
Parts may appear physically identical but could Parts may appear physically identical but could
havehave
different electrical ratings. Replace parts by partdifferent electrical ratings. Replace parts by part
number and model number and model
numbernumber
. Using an . Using an
incorrect partincorrect part
could result in could result in
damage to the product, damage to the product,
fire, injuryfire, injury
, or, or
possibly death.possibly death.
4-2-6 Note for Using the 4-2-6 Note for Using the
PTC-StartePTC-Starte
rr
(1) Be careful not to allow over-voltage and (1) Be careful not to allow over-voltage and
over-current.over-current.
(2) Do not (2) Do not
drop or handle drop or handle
carelesslycarelessly
..
(3) Keep away from any liquid.(3) Keep away from any liquid.
If liquid such as oil or water If liquid such as oil or water
enters the PTC,enters the PTC,
PTC materials may fail due to breakdown PTC materials may fail due to breakdown
of theirof their
insulating capabilities.insulating capabilities.
(4) If the exterior of the PTC is (4) If the exterior of the PTC is
damaged, the resistancedamaged, the resistance
value may be altered. This can cause value may be altered. This can cause
damage to thedamage to the
compressor and result in a compressor and result in a
no-start or hard-to-startno-start or hard-to-start
condition.condition.
(5) Always use the PTC designed for the compressor (5) Always use the PTC designed for the compressor
andand
make sure it is properly make sure it is properly
attached to the compressorattached to the compressor
..
Parts may appear physically identical but could Parts may appear physically identical but could
havehave
different electrical ratings. Replace parts by partdifferent electrical ratings. Replace parts by part
number and model number and model
numbernumber
. Using an . Using an
incorrect partincorrect part
could result in could result in
damage to the product, damage to the product,
fire, injuryfire, injury
, or, or
possibly death.possibly death.
PTC STARTERPTC STARTER
SEALEDSEALED
TERMINALTERMINAL
COMPRESSORCOMPRESSOR
MOTORMOTOR
CC
MM
SS
MM
33
66
55
22
SS
PTCPTC
NN
L1L1
OVERLOAD PROTECTOROVERLOAD PROTECTOR
Resistance Starter Capacitor RunningResistance Starter Capacitor Running
Fig. 1Fig. 1
4. ADJUSTMENT4. ADJUSTMENT
CC
- 14 -- 14 -
Contents Summary of Kenmore 795 71303 902
- Page 1BOTTO BOT TOMM FRE FREEZE EZER R REF REFRIG RIGERA ERATO TOR R REFRIGERATOR SERVICE MANUAL CAUTION BEFORE SERVICING THE PRODUCT READ THE SAFETY PRECAUTIONS IN THIS MANUAL. MODELS: 795.71303.902 795.71306.902 795.71302.902 795.71309.902 795.71304.902 MFL62078232 Sears Brands Management Management Cor
- Page 2ECN (Engineering Change Number) Rev.01 Valve inclined in order to improve house connection Rev.02 Compressor change from MQ53LAUM (PTC) to MQ53LAUM (e-PTC)
- Page 3CONTENTS SAFETY PRECAUTIONS ............. ........................... ............................. ............................. ............................. ............................. ............................ ................... ..... 3 1. SPECIFICATIONS ............. .....................
- Page 4SAFETY PRECAUTIONS Please read the following instructions before servicing your refrigerator refrigerator.. 1. Check the refrigerator for current leakage. 7. Before tilting the refrigerator refrigerator,, remove all materials from on or in the refrigerator. 2. To To prevent electric e lectric shock,
- Page 51. SPECIFICATIONS 1-1. DISCONNECT POWER CORD BEFORE SERVICING IMPORTANT: Reconnect all grounding devices. All parts of this appliance appliance capable of conducting electrical electrical current are grounded. If grounding wires, screws, straps, clips, nuts or washers used to complete a path to grou
- Page 61-7. REPLACEMENT PARTS PERFORMA NCE DATA PERFORMANCE (NORMAL OPERATING CONDITIONS) Relay........................................................... EBG42993601 Overload.................... Overload......... ...................... ..................... ..................... ............. 6750C-0005P
- Page 7DIMENSIONS Description 7130* Depth w/ Handles A 34 5 8 1 Depth w/o Handles B 32 8 Depth w/o Door C 28 ¼ Depth (Total with Door Open) D 45 ½ Height to Top of Case E 67 11 16 Height to Top of Door Hinge F 69 1 16 Width G 32 ¾ Width (door open 90 deg. w/o handle) H 36 ¼ Width (door open 90 deg. w/ hand
- Page 82. PARTS IDENTIFICATION A B K C L D E F M G N H O I J Use this section to become more familiar with the parts and features. NOTE: This guide covers several different models. The refrigerator you have purchased may have some or all of the items listed below. The locations of the features shown below
- Page 93. DISASSEMBLY 3-1 FAN AND FAN MOTOR 3-3 LAMP 1. Remove the freezer shelf. (If your refrigerator has an icemaker, remove the icemaker first). 2. Remove the plastic guide for slides on left side by unscrewing phillips head screws. 3. Remove the grille by removing one screw and pulling the grille forw
- Page 103-4 CONTROL CON TROL BOX-REFRIGERA BOX-REFR IGERATOR TOR 1. First, remove all shelves in the refrigerator, than remove the Refrigerator control Box by loosening 2 screws. CONTROL BOX COVER LAMP Fig. 6 2. Remove the Refrigerator Control Box by pulling it downward. 3. Disconnect the lead wire on the r
- Page 113-6 DOOR DISASSEMBLY 3-6-1 REMOVE REFRIGERATOR DOOR 3-6-2 REPLACE REFRIGERATOR DOOR IMPORTANT: Before you begin, turn the refrigerator OFF and IMPORTANT: Before Right Door Unplug it. Remove food and any bins from doors. Lower the door onto the middle hinge pin (7). Left Door Make sure the door is al
- Page 123-6-3 PULL OUT DRAWER (a) HOW TO REMOVE PULL OUT DRAWER IMPORTANT: To avoid possible injury, product or CAUTION: When removing drawer door, do not hold it property damage, you will need two people to perform by the handle. Door could fall down and you may be the following instructions. injured grasp
- Page 13(b) HOW TO INSTALL PULL OUT DRAWER IMPORTANT: To avoid possible injury, product or • Align the top holes of the rail cover with the top holes of property damage, you will need two people to perform the door supports to assemble the r ail cover. the following instructions. • With both hands, hold the
- Page 143-6-4 HOW TO REMOVE DOOR HANDLES NOTE: Handle appearance may vary from illustrations 2. Removi Removing ng Freezer Drawer Handle on this page. • Loosen the set screws located on the lower side of the handle with the 3/32” Allen 1. Removi Removing ng Refrigerator Refrigerator Handle wrench and remove
- Page 153-7 LEVELING AND DOOR ALIGNMENT (a) LEVELING (b) DOOR ALIGNMENT Your refrigerator has two front leveling screws one on If the space between your doors is uneven, follow the the right and one on the left. If your refrigerator seems instructions below to align the doors: unsteady or you want the doors
- Page 164. ADJUSTMENT 4-1 COMPRESSOR 4-2-3 PTC-Applied Circuit Diagram Starting Method for the Motor 4-1-1 Role The compressor intakes low temperature and low pressure gas from the evaporator of the refrigerator and compresses OVERLOAD PROTECTOR this gas to high-temperature and high-pressure gas. It then L1
- Page 174-3 OLP (OVERLOAD PROTECTOR) 4-3-1 Definition of OLP (1) 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 activat ing the bimetal bimet al spring in the OLP OL P. (2) When high current flows to t
- Page 185. CIRCUIT DIAGRAM - 16 -
- Page 196. TROUBLESHOOTING 6-1. COMPRESSOR AND ELECTRIC COMPONENTS (Rated voltage YES Remove PTC-Starter 1 Power Source. from compressor and 2 measure voltage between Termina Terminall C of compressor and terminal 5 or 6 of PTC. YES No voltage. Reconnect. 5 NO Check connection condition. Replace OLP. Applie
- Page 206-2. PTC AND OLP Normal operation of Separate PTC-Starter Observation value is compressor is impossible from Compressor and 115V/60Hz : 6.8 ? ±20% or poor. measure resistance between No. 5 and 6 of PTC-Starter with a Tester. (Figure 1) The resistance value Replace PTC- is 0 ? (short) or Starter. (op
- Page 216-3 OTHER ELECTRICAL COMPONENTS • Not cooling at all Compressor Check for open short or doesn't run. Cause incorrect resistance readings in the following components a. Starting devices Short, open, or broken. Poor contact b. OLP or shorted. c. Compressor coil Coil open or shorted. d. Wirin Wiringg h
- Page 226-4 SERVICE DIAGNOSIS CHART COMPLAINT POINTS TO BE CHECKED REMEDY No Cooling. • • Plug into the outlet. • Check if the t he power switch swi tch is set to t o OFF. OFF. • Set the switch to ON. • Check if the fuse of the power switch is shorted. • Replace the fuse. • Measure the voltage of the power
- Page 236-5 REFRIGERATION CYCLE • Troubleshooting Chart - 21 -
- Page 246-5-1 SEALED SYSTEM DIAGNOSIS Not Cooling Complaint All components operating, No airflow problems, Not frosted up as a defrost problem problem has been isolated to sealed system area Frost Partial None Pattern? Equalization Equalization Test Test Very Fast Fa st Very Slow Very Slow Fast Very Fast F
- Page 257. OPERATION PRINCIPLE AND REPAIR METHOD OF ICEMAKER 7-1 OPERATION OPERATION PRINCIPLE PRI NCIPLE 7-1-1 Operation Principle of Icemaker Power Input Initial Control • Adjusts Ejector to Start Position with Position with power on. Icemaking Control • Waits until water in the TRAY is frozen after Icema
- Page 267-2 ICEMAKER FUNCTIONS 7-2-1 Start Position 1) When power is initially applied or reapplied after power is cut, it detects level of the TRAY after completion of MICOM initialization. The detecting lever moves up and down. 2) The level of icemaker tray is judged by output signal, high and low signal,
- Page 27MAXIMUM TILTING POINT Bank is not full ON HALL Sensor OFF Output Signals Bank is full ON HALL Sensor Output Signals OFF Ice checking AXIS LEVEL 30° Ice checking AXIS -0° -10° -8°-0° -8° -32° -41° -53° -58° -80° -160° -170° Lock Lock Icemaking Ice ejection original point A B C 2±1 sec Horizontal 9±3
- Page 287-2-4 Test Icemaker Mode Test function starts when test switch is press ed for more than 3 seconds. seconds. User shouldn’t force operation while doing test mode, service or cleaning. Test switch will work only when ice tray its in horizontal position, not during ice ejection or water supplying. Whe
- Page 298. CIRCUIT OF MICOM 8-1 FUNCTION 8-1-1 Function 1. Initially set the Refrigerator control at 37ºF (3ºC) and the Freezer control at 0ºF(-18ºC) You can adjust the Refrigerator and the Freezer control temperature by pressing the Colder ADJUST button. 2. When the power is restored after a power failure,
- Page 308-1-6 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 1/2 sec onds. These tones repeat every 30 seconds. 3. The alarm is cancelle
- Page 318-1-10 Defect Diagnosis Function Micom error are separated in “Main Errors” (Affect directly refrigerator performance) and “Secondary Errors” (don’t affect the refrigerator performance). To check in Display the error present, is necessary press Cold key on freezer and Cold key on refrigerator more t
- Page 328-1-11 TEST Mode 1. The Test mode allows checking the PCB and the function of the product as well as finding out the defective part in case of an error. 2. The test mode is operated by pressing two buttons on the Display panel. 3. While in the test mode, the function control button is not recognized
- Page 338-2 PCB FUNCTION CON 7 CON 6 CON 5 CON 4 CON 8 CON 9 CON 10 CON 1 CON 3 CON 2 - 31 -
- Page 348-2-1 Power Circuit Fig. 1 8-2-2. Load and Door Light Circuit (HV) 1. Load Drive Condition Check To measure outputs of the control board, check voltages between the pins for the following components: (Refer to Fig. 1). Pin Pin Output Circuit Number Number Voltage Connector 1 Compressor Con 1 Pin 1 C
- Page 35Fig. 2 2. Door Monitor Circuit Ci rcuit (LV) Refrigerator Pin Number Pin Number Voltage F Door Close Con 7 Pin 4 Con 7 Pin 5 5 Volts F Door Open Con 7 Pin 4 Con 7 Pin 5 0 Volts R Door Close Con 8 Pin 3 Con 8 Pin 4 5 Volts R Door Open Con 8 Pin 3 Con 8 Pin 4 0 Volts Connector 8 Pin 4 3 2 1 R-Door S/W
- Page 36To measure the outputs of the sensors, check the voltages between the pins as in the table. And refer the values in the section “RESISTANCE SPECIFICATION SPECIFICATION OF SENSOR” Sensor Pin Number Pin Number F- Sensor Con 7 Pin 10 Con 7 Pin 11 R- Sensor Con 7 Pin 8 Con 7 Pin 9 D- Sensor Con 7 Pin 6
- Page 378-3 RESISTANCE SPECIFICATION OF SENSOR TEMPERA TEMPE RATURE TURE DETECTE DETECTED D RESISTANCE OF FREEZER RESISTANCE OF REFRIGERATOR SENSOR SENSOR DEFROST SENSOR & ROOM SENSOR -20°C 22.3 K? 77 K? -15°C 16.9 K? 60 K? -10°C 13.0 K? 47.3 K? -5°C 10.1 K? 38.4 K? 0°C 7.8 K? 30 K? +5°C 6.2 K? 24.1 K? +10°
- Page 38
- Page 39#EV# FREEZER PARTS CAUTION: Use the part number to order part, not the position number. number. 136B 131A 145C 248E 248F 145F 136A
- Page 40#EV# REFRIGERATOR PARTS CAUTION: Use the part number to order part, not the position number. number. 147C 147A 143F 141B 143F 141B 141C 248G 141C 248G 143F 141B 143F 141B 141C 248G 141C 248G
- Page 41#EV# REFRIGERA REFRIGE RATOR TOR PARTS (P (PANTRY) ANTRY) Caution: Use the part number to order part, not the position number. 167B 154A 145J 151B 145G 151A 145H 154B 128B 170A 128A
- Page 42#EV# DOOR PARTS CAUTION: Use the part number to order part, not the position number. number. 230B 230A 104E 233D 233A 231A 231B 233B 233C 241F 212G 241A 248L 241C 241B 233G 233H 248M 212K 241C 212K 241H 248L 248M 248L 241C 244A 241H 233F 244A 212J 233E 212J 248M 241H 241C 248M 248L 241C 248L 212K 28
- Page 43#EV# WATER & ICEMAKER IC EMAKER PARTS Caution: Use the part number to order part, not the position number. 600A 622B 627A 616E 619C S31
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