Kenmore Elite 795.78344.800 User Manual

R
BOTTOM FREEZER REFRIGERATOR
REFRIGERATOR
SERVICE MANUAL
CAUTION BEFORE SERVICING THE PRODUCT READ THE SAFETY PRECAUTIONS IN THIS MANUAL
795.78342.800
ENGLISH
795.78343.800
795.78344.800
795.78346.800
795.78349.800
795.78352.800
795.78353.800
795.78354.800
795.78356.800
795.78359.800
Sears, Roebuck and Co., Hoffman Estates, IL60179 U.S.A.
www.sears.com
CONTENTS
SAFETY PRECAUTIONS ..........................................................................................................
1. SPECIFICATIONS ..................................................................................................................
2. PARTS IDENTIFICATION .......................................................................................................
3. DISASSEMBLY ......................................................................................................................
3.1 Door ..................................................................................................................................
3.2 To remove the dispenser ....................................................................................................
3.3 Fan and fan motor ..............................................................................................................
3.4 Defrost control assembly ...................................................................................................
3.5 Lamp .................................................................................................................................
3.6 Refrigerator control box .....................................................................................................
3.7 Multi duct ...........................................................................................................................
3.8 How to remove and reinstall the pullout drawer ...................................................................
3.9 Cover Valve .......................................................................................................................
4. COMPRESSOR ELECTRICAL .............................................................................................
4.1 Compressor ......................................................................................................................
4.2 PTC-Starter .......................................................................................................................
4.3 OLP (overload protector) ...................................................................................................
4.4 To remove the cover PTC (only if applies) ...........................................................................
4.5 To remove the COMBO (only if applies) ..............................................................................
5. CIRCUIT DIAGRAM ...............................................................................................................
6. TROUBLESHOOTING ...........................................................................................................
6.1 Compressor and electrical components .............................................................................
6.2 PTC/ COMBO and OLP .....................................................................................................
.
6.3 Other electrical components ..............................................................................................
6.4 Service diagnosis chart ......................................................................................................
6.5 Refrigeration cycle .............................................................................................................
6.6 Troubleshooting with error .................................................................................................
7. ICEMAKER OPERATING PRINCIPLES AND REPAIR ..........................................................
7.1 Operation Principle ............................................................................................................
.
7.2 Ice maker functions ............................................................................................................
7.3 Defect diagnosis function ...................................................................................................
8. WATER FILTER ......................................................................................................................
8.1 Water filter cartridge replacement ......................................................................................
8.2 Water dispenser (on some models) ....................................................................................
9. DESCRIPTION OF FUNCTION & CIRCUIT OF MICOM .........................................................
9.1 Function ............................................................................................................................
9.2 PCB function .....................................................................................................................
9.3 Resistance specification of sensor .....................................................................................
9.4 Troubleshooting ................................................................................................................
9.5 Main PWB assembly and parts list .....................................................................................
9.6 PWB diagram ....................................................................................................................
10. EXPLODED VIEW AND REPLACEMENT PART LIST .........................................................
795.783**.800 .......................................................................................................................
2 3 5 6 6 7 8 8 8 9 9 9 12 13 13 13 14 14 14 15 16 16 17 18 19 20 22 30 30 31 32 33 33 34 35 35 40 48 49 51 53 54 60
SAFETY PRECAUTIONS
Please read the following instructions before servicing your refrigerator.
1. Check the refrigerator for current leakage.
2. To prevent electric shock, unplug before servicing.
3. Always check line voltage and amperage.
4. Use standard electrical components.
5. Don´t touch metal products in the greezer with wer hands. This may cause frost bite.
6. Prevent water from spiling on to electrical elements or the machine parts.
- 2 -
7. Before tilting the refrigerator, remove all materials from on or in the refrigerator.
8. When servicing the evaporator, wear gloves to prevent injuries from the sharp evaporator fins.
9. Service on the refrigerator should be performed by a qualified technician. Sealed system repair must be performed by a CFC certified technician.
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 p ath 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 applaince 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 (Position: MID) ......................................................................................................................-6°F to +8°F
Defrost Control .........................................................................................................................................................Automatic
Defrost Thermostat ...........................................................................................................................................................50°F
Electrical Rating : 115VAC, 60Hz .....................................................................................................................................1 - 5 A
Maximum Current Leakage ............................................................................................................................................0.5mA
Maximum Ground Path Resistance ..........................................................................................................................0.14Ohms
Energy Consumption ...............................................................................................................23cuft 466kWh/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 ..............................................25% - 35% .............................................................................45% - 60%
1-5 REFRIGERATION SYSTEM 1-6 INSTALLATION
Minimum Compressor Capacity Vacuum ..........................21 in Clearance must be provided at top, sides and rear of the
Minimum Equalized Pressure refrigerator for air circulation.
at 70°F ..............................................................49PSIG AT TOP ...........................................................................1in
at 90°F ..............................................................56PSIG AT SIDES ..................................................................1/18 in
Refrigerant R134a ..........................................................4.2oz AT REAR .........................................................................1in
Compressor ..........................................................-700 BTU/hr
- 3 -
PERFORMANCE DATA
(NORMAL OPERATING CONDITIONS)
AMB WATTS
70°F 90°F
110°F
98 (+10 / -10) 98 (+10 / -10) 103 (+5 / -5)
1-8 AIR FLOW
SYSTEM PRESSURE (PSIG)
HIGH SIDE LOW SIDE
98 (+5 / -3) 132 (+3 / -3) 180 (+5 / -5)
(-5) to (-2)
(-4) to 1 (-2) to 3
1-7 REPLACEMENT PARTS
Thermistor assembly (COMBO)...........
Defrost Thermostat ..............................
Defrost Heater .....................................
Evaporator fan motor ..........................
Capacitor .............................................
Compressor (Hi-Side) ..........................
Compressor (Lo-Side) .........................
Condenser ...........................................
Dryer ...................................................
Condenser fan motor ...........................
Temperature Control ............................
Main Control ........................................
Harness assembly.................................
EBG43493101 6615JB2005C 5300JB1100J 4681JK1004A 0CZZJB2012J TCA32125901 5421JJ1001B 5403JJ1007A 5851JJ2002B 4681JB1029J 6871JB1439C 6871JK1011G 6877JK2017C
EVAPORATOR FAN
DRYER
COMPRESSOR
EVAPORATOR
HOT LOOP
CONDENSER
COLD AIR
MIXED AIR
AIR RETURN TO
EVAPORATOR
CONDENSER FAN
FRESH FOOD
Vegetable box
FREEZER
M
A
- 4 -
2. PARTS IDENTIFICATION
O
A
B
C
D
E
F
G
H
N
M
L
K
J
I
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 may not match your model.
A
Refrigerator Light Refrigerator Shelves
B
Snack Pan
C
Crisper
D
Adjusta Cube Ice Maker
E
Ice Bin
F
Durabase
G
Divider
H
I
Glide-Out Drawer Basket Freezer Light
J
K
Egg Box Modular Door Bins
L
Can Rack*
M
Dairy Corner
N
Filter
O
*On some models
- 5 -
3. DISASSEMBLY
3-1 DOOR
Left Door
• Loosen the screws and remove the cover on back side (see figure A).
• Disconnect water supply tube by pusshing back on the disconnect ring (3).
• Loosen the cover screws (1).
• Disconnect door switch wire (2).
• Disconnect wire harness (4).
• Pull out the tube (5).
• Loosen hinge bolts (6).
• Lift off the top hinge (7).
• Place the door on a non-scratching surface with the inside up.
Right Door
Loosen the cover screws (1). Disconnect door switch wire (2).
Disconnect wire harness (3).
Loosen ground screw (4).
Loosen hinge bolts (5). Lift off the top hinge (6).
Place the door on a non-scratching surface with
the inside up.
(1)
(1)
Door Gasket Removal
1. Remove door frame cover
Starting at top of cover and working down, snap cover out and away from door.
Frame Cover
Handle
Figure 2
2. Remove gasket bracket clips
There are two clips on each door. Start bracket removal near one of the middle clips.
1) Pull gasket back to expose gasket bracket clip and door frame.
2) Insert a flat tip screwdriver into seam between gasket bracket and door frame and pry back until clips snap out.
3) Continue prying back along seam until all clips snap out.
(2)
(4)
(6)
(7)
(5)
(2)
(3)
LEFT RIGHT
A
Figure A
Figure 1
(5)
(4)
(6)
Door
Frame
Gasket
Bracket Clip
Figure 3
Flat Tip
Screwdriver
Gasket
Bracket
3. Remove gasket
Pull gasket free from gasket channel on the three remaining sides of door.
3333
Figure 4
Door Gasket Replacement
1. Insert gasket bracket clips
1) Insert gasket bracket edge beneath door frame edge.
2) Turn upper gasket bracket spring so that both spring ends are in the door channel.
- 6 -
3) Push in clip until you hear it snap securely into place.
Gasket Bracket Clip
Spring
Door
Frame
Correct Incorrect
Figure 5
4) Push in remaining two clips until you hear each snap securely into place.
Note: Make sure that no part of gasket bracket edge
protrudes from beneath door frame edge.
2. Insert gasket into channel
1) Snap gasket assembly into the door bracket.
Inserting the Gasket Assembly into the Bracket Door.
3. Replace door frame cover
Starting at top of cover and working down, snap the cover back into door.
Figure 8
3-2 TO REMOVE THE DISPENSER
1. Use flat tip screwdriver to pry back hooks on botton underside of cover dispenser.
Correct
Incorrect
Figure 6
2) Press gasket into channel on the three remaining sides of door.
Figure 7
Figure 9
2. Pry off cover dispenser.
Figure 10
Disconnect wire harness.
3. Replace cover dispenser in opposite manner and order of removal.
- 7 -
3-3 FAN AND FAN MOTOR
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 forward.
4. Remove the Fan Motor assembly by loosening 2 screws.
5. Pull out the fan and separate the Fan Motor and Bracket.
FAN MOTOR
3-5 LAMP
Figure 14
BRACKET
MOTOR
FAN
GRILLE
Figure 11
3-4 DEFROST CONTROL ASSEMBLY
Defrost Control assembly consist pf Defrost Sensor and FUSE-M. The defrost Sensor wotks to defrost automatically. It is attached to the metal side of the Evaporator and senses its Temperature. Fuse-M is a safety device for preventing over-heating of the evaporator area when defrosting. At 72°C, it turns the Defrost Heater off.
1. Pull out the grille assembly. (Figure 12).
2. Separate the connector with the Defrost Control assembly and replace the Defrost Control assembly after cutting the tie wrap. (Figure 13).
3. Be sure to retire the wires when reassembling after service.
3-5-1 To change the refrigerator light
1. Unplug the power cord from the outlet.
2. Remove refrigerator shelves.
3. Release the hooks on the front of the light shield with the help of a flat screwdriver and pull the shield down to remove it.
4. Turn the bulb counterclockwise.
5. To assemble, first insert the hooks at the back and then push up the light shield.
Figure 15
3-5-2 To change the freezer light
1. Unplug refrigerator or disconnect power.
2. Reach behind light shield to remove bulb.
3. Replace bulb with a wattage indicated in the refrigerator section, as shown in picture 1.
4. Plug in refrigerator or reconnect power.
1111
GRILLE ASSEMBLY
Figure 12
DEFROST-CONTROL ASSEMBLY
Figure 13
Figure 16
- 8 -
3-6 REFRIGERATOR CONTROL BOX
1. First, remove all shelves in the refrigerator, then nremove the refrigerator controll box by loosening 2 screws.
CONTROL BOX
2) Remove the lower drawer.
COVER LAMP
Figure 17
2. Remove the Refrigerator Control Box by pulling it downward.
3. Disconnect the lead wire on the right position and separate the lamp sockets.
3-7 MULTI DUCT
1. Remove the upper cap by using a flat screwdriver, and remove 2 screws. (Figure 18)
2. Disconnect the lead wire On the bottom position.
Figure 18
3-8 HOW TO REMOVE AND REINSTALL THE PULL OUT DRAWER 3-8-1 Follow steps to remove
1) Open the freezer door.
3) Remove the two screws from the guide rails (one from each side).
4) Lift the freezer door up to unhook it from the rail support and remove. Pull both rails to full extension.
- 9 -
5) First: Remove the gear from the left side first by releasing the tab behind the gear, place a screwdriver between the gear and the tab and pull up on the gear. Second: Remove the center rail. Third: Remove the gear from the right side by following the same steps for the left side.
NOTE: This tab must be pushed in to release the gear.
2) Insert the rail into the right side gear. Gears do not need to be perpendicular to each other.
3-8-2 Follow steps to reinstall
1) Reinstall the right side gear into the clip.
3) Insert the rail into the left side gear, and insert the gear into the clip.
4) The rail system will align itself by pushing the rails all the way into the freezer section. Pull the rails back out to full extension.
- 10 -
5) Reinstall the freezer door by inserting the rail tabs into the guide rail.
6) Reinstall the two screws into the guide rails (one from each side).
7) Reinstall the lower drawer, and close the freezer door.
2. To install, pull both rails out to full extension. Hook the basket supports into the rail tabs and push to the back of compartment.
3-8-3 GLIDE OUT DRAWER BASKET
1. To remove, lift basket up and pull out straight out.
1
2
- 11 -
3-9 COVER VALVE
-Disasssembly
1. Remove the screw.
2. Push and then push to the right and release
- Assembly
1. Insert the cover valve as shown n the picture, push to insert (may need force).
2. Insert hook a & b.
a
b
3. Release hooks a & b.
a
b
4. Turn the cover valve 120° as shown in the picture, then release it.
3. Push to the right to insert the cover valve.
4. Then push and release. Install the screw.
- 12 -
4. COMPRESSOR ELECTRICAL
4-1 COMPRESSOR 4-1-1 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.
4-1-2 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 repairing it.
4-1-3 Note for Usage (1) Be careful not to allow 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 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. If the hermetic connector rusts out or fails, refrigerant and oil will be expelled into the contact area, probably resulting in smoke and fire. (5) When replacing the compressor, be careful that dust, humidity, and soldering flux don´t contaminate the inside of the compressor. Contamination in the cylinder may cause noise, improper operation or even cause it to lock up.
4-2 PTC-STARTER/ COMBO 4-2-1 Composition of PTC- Starter
4-2-4 Role of Combo TSD (1) The combo is attached to the sealed compressor and is
used for the operation and protect the motor. (2) The compressor is a single phase induction motor. During the starting and operation, the combo allows current flow to both the start and main winding.
4-2-5 PTC/Combo - Applied Circuit Diagram Starting Method for the Motor
PTC DIAGRAM
OVERLOAD PROTECTOR
N
PTC
2
L1
Resistance Starter Capacitor Running
3
PTC STARTER
5
6
C
COMPRESSOR MOTOR
S
M
S
SEALED TERMINAL
M
Figure 17
COMBO DIAGRAM
COMPRESSOR MOTOR
T
MA
AS
IN
M
SEALED TERMINAL
S
T R
S
PTC
C
M
N
OLP
L
LINE
(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.
4-2-2 Role of PTC-Starter (1) The PTC is attached to the Sealed Compressor and is
used for starting the motor. (2) The compressor is a single-phase induction motor. During the starting operation, the PTC allows current flow to both the start winding and main winding.
4-2-3 Combo TSD TSD (Time Starting Device) is a new electronic starting
system for high efficiency compressors due to the following characteristics: (1) Combo concept-overload protector, electronic board and cover in a single casing. (2) Fully electronic concept. (3) Full integration of starting and protection devices. (4) Free from mechanical and electromagnetic noises.
- 13 -
4-2-6 Motor Resarting and PTC/ Combo Cooling (1) It requires approximately 5 minutes for the pressure to
equalize before the compressor can restart. (2) The PTC/Combo device generates hea during operation. Therefore, it must be allowed to cool before the compressor can restart.
4-2-7 Relation of PTC-Starter / Combo and OLP (1) If the compressor attempts to restart before the
PTC/Combo device is cooled, the PTC/Combo device will allow current to flow only to the main winding. (2) The OLP will open because of the over current condition. Thissame process will continue (3 to 5 times) when the compressor attempts to restart until the PTC/Combo device has cooled. The corret 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. Using an incorrect part could result in damage to the product, fire, injury, or possibly death.
4-2-8 Note for using the PTC-Starter / Combo (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/Combo, PTC/Combo materials may fail due to breakdown of their insulating capabilities. (4) If the exterior of the PTC/Combo 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/Combo 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. Using an incorrect part could result in damage to the product, fire, injury, or possibly death.
4-3 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 activating the bimetal spring in the OLP. (2) When high current flows to the compressor motor, the bimetal wors by heating the heater inside the OLP, and the OLP protects the motor by cutting off the current flowing to the compressor motor.
4-3-2 Role of the OLP
4-4 TO REMOVE THE COVER PTC (only if applies)
(1) Remove the cover Back M/C. (2) Disconnect two housing upper side of comp connected in. (3) Loosen two screws on comp base.
(4) Use a L-shaped flap tool to pry off the cover. (5) Assembly in reverse order of disassembly.
4-5 TO REMOVE THE COMBO (only if applies)
(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 adjust screw of the OLP in anyway.
(OVERLOAD PROTECTOR cross section)
Customer part number
12345678
Lot code/ date code
Physical
termination part number
Electrical
characteristics
part number
330 FBYY -S1 BOX98
Figure 18
(1) Remove the cover Back M/C. (2) Disconnect two housing upper side of comp connected in. (3) Loosen two screws on comp base. (4) Use a flat screwdriver to take off the clip from the lower side. (5) Take the combo off. (6) To assembly the side with the “U” form is hooked in the central part of the compressor base. (7) Press the “A” point and lift the “B” point to hook to compressor.
B
A
(5) (5) (5)
111
- 14 -
222
333
5. CIRCUIT DIAGRAM
PWB(PCB) ASSEMBLY,DISPLAY
BK
4
C-FAN
F-FAN
SB
BL
BO
2RD3
1
RT-SENSOR
PUMP S/W
R-DOOR S/W
WH
1
CON4
BL
BK
GY
PR
3
2
5
4
6
BK
CON6
PWB(PCB) ASSEMBLY, MAIN
L1
3
4
5
6
8
10 7
9
POWER
SUPPLY
CORD
N L
GN/YL (GN)
CON1
11
GN
YL
BN
BL
/YL
BL
BN
GN/ YL
PCB EARTH
YL
ICE MAKER PART
GN/YL
(GN)
(98 C)
FUSE-M
BK
M
MOTOR
SHEATH
HEATER,
ICE SENSOR
WH
WH
WH
1
2
1
CON5
CON4
BK
WH
WH 1
2
1
CON2
CON3
S/W
POWER
ICE MAKER
BK
BL
RD
2
1
1
CON1
CON6
PWB (PCB) ASSEMBLY, ICE MAKER
*PLUG TYPE, ICE MAKER PART, CAPACITOR PART, PCB EARTH,
P.T.C START OPTION, COMP' EARTH PART AND COMP' ACCESSORIES ON CIRCUIT DIAGRAM ARE SUBJECT TO CHANGE IN DIFFERENT LOCALITIES AND MODEL TYPE.
2
BL
WH
BL
WH
V
I/MAKER W/VALVE
BL
COMP' ACCESSORIES
1
CAPACITOR PARTCAPACITOR PART
Cr
RD
Cs
BO
1
2
PTC STARTER
SB
BL
3
4
5
7
6
PK
PR
CON2
PK
PR
PK
22
SMS
44 55
M
33 66
* ALTERNATIVE COMP' ACCESSORIES
BL
3
4
2
RD
BN
RD
BK
OLPOLP
GNGN
/YL/YL
(GN)(GN)
COMP' EARTHCOMP' EARTH
PARTPART
Cr
N
BN
PTC
GY
1
CON7
1
GY
2
CON3
RD
BN
YL
BN
7
6
5
4
3
2
1
5BK4
3
BN
BL
BL
BN
THERMOSTAT
V V
R-LAMPS
CON5
BL
12
BL
11 10
WH
9
WH
BO
8
BO
7 6
PK
5
PK
4
YL
3 2
BL
1
F-SENSOR
R-SENSOR
DEF-SENSOR
F-DOOR S/W
STEPPING MOTOR
(72 C)
FUSE-M
RD
F-LAMP
FRENCH DOOR HEATER
DISPENSER W/VALVE PART
BL
BL
BK
L
OLP
BL
* P.T.C START OPTION
MC,MQ COMP'
4
3 2
HEATER,SHEATH
BL
2
BL
EG COMP'
3
5
6
4
56
BK:BLACK
COMBO KIT(PTC+OLP)
BN:BROWNWH:WHITE
PK:PINKYL:YELLOW
GN:GREEN
BO:BRIGHT ORANGE
GY:GREYPR:PURPLE
MEZ48108404
RD:REDSB:SKY BLUE BL:BLUE
- 15 -
6. TROUBLESHOOTING
6-1 COMPRESSOR AND ELECTRIC COMPONENTS
1
2
Power Source.
Check
Check resistance
resistance of
of motor
motor
compressor.
compressor.
.
Remove PTC-Starter/Combo from compressor and measure voltage between Terminal C of compressor and terminal 5 or 6 of PTC/Combo
No voltage.
Applied voltage isn't in acceptable range. (115V ±10%)
Check the resistance between M-C, S-C and M-S in motor compressor. Check each pin to ground.
(Rated voltage ±10%)?
OLP disconnected?
Advise customer that power supply needs to be checked by an electrician.
Open or short
or short to ground
Replace compressor
YES
YES
NO
The resistance between pins should be between 1 and 50 ohms. The resistance to ground should be infinite.
Replace OLP.
Check connection condition.
Reconnect.
43
2
5
5
3
5
3
4
5
Check resistance of PTC-Starter.
Check OLP.
Check starting state.
Check resistance of
PTC-Starter/Combo
Check resistance of two terminals in OLP.
Check the power supply under load. (Compressor attempting to re-start after being off for 5 minutes).
Check resistance of two terminals in PTC-Starter/Combo
Refer to Page 16.
Supply voltage rating with ±10%.
YES
Did
compressor
start?
NO
Refer to Page 16.
YES
Compressor is OK
Replace the compressor
NO
1
- 16 -
6-2 PTC / COMBO AND OLP
Normal operation of compressor is impossible or poor.
65
Separate PTC-Starter/Combo
from Compressor and measure resistance
between No. 5 and 6 of PTC-Starter with a Tester.
(Figure 19a and figure 19b)
Separate OLP from compressor and check resistance value between two terminals of OLP with a tester. (Figure 20)
Observation value is
115V/60Hz : 6.8 ±30%
at room temperature
The resistance value is 0 (short) or 8(open).
Shows continuity
Open
Check another electric component.
Replace OLP.
PTC/ Combo OK
Replace PTC­Starter/Combo
OLP OK
Figure 19a
?
Figure 20
Figure 19b
- 17 -
6-3 OTHER ELECTRICAL COMPONENTS
Not cooling at all
Compressor
doesn't run
Poor cooling performance
Compressor runs poorly
Check for open short or incorrect resistance readings in the following components
a. Starting devices b. OLP
c. Compressor coil d.Wiring harness
Check starting voltage.
Check voltage at starting devices.
Cause
Short, open, or broken. Poor contact
or shorted. Coil open or shorted.
Poor contact or shorted.
Low voltage.
Poor or broken or open contact.
Replace indicated component.
Advise customer that the power supply
needs to be checked
by an electrician.
Replace indicated component.
Fan motor doesn't run.
Heavy frost buildup on evaporator
Check current flowing
In run winding of
Compressor.
Check rating of OLP.
OLP: 4TM319NFBYY Temp. 120°C
Check wiring circuit.
13 - 15 V
Check Fan Motor.
Check current flow in the following components: Sensor Fuse-M
Check resistance flow in
the defrost heater.
Shorted.
Lack of capacity.
Wire is open or shorted.
Coil is shorted or open.
Open.
Open.
Replace indicated component.
Replace indicated component.
Replace defrost heater.
- 18 -
6-4 SERVICE DIAGNOSIS CHART
COMPLAINT POINTS TO BE CHECKED REMARKS
No Cooling.
Cools poorly.
Food in the Refrigerator is frozen.
Condensation or ice forms inside the unit.
Condensation forms in the Exterior Case.
There is abnormal noise.
•Is the power cord unplugged from the outlet?
•Check if the power switch is set to OFF.
•Check if the fuse of the power switch is shorted.
•Measure the voltage of the power outlet.
•Check if the unit is placed too close to the wall.
•Check if the unit is placed too close to the stove, gas cooker, or in direct sunlight.
•Is the ambient temperature too high or the room door closed?
•Check if food put in the refrigerator is hot.
•Did you open the door of the unit too often or check if the door is sealed properly?
•Check if the Control is set to Warm position
•Is food placed in the cooling air outlet?
•Check if the control is set to colder position.
•Is the ambient temperature below 5°
•Is liquid food sealed?
•Check if food put in the refrigerator is hot.
•Did you open the door of the unit too
Often or check if the door is sealed properly?
•Check if the ambient temperature and humidity of the surrounding air are high.
•Is there a gap in the door gasket?
•Is the unit positioned in a firm and even place?
•Are any unnecessary objects placed Behind side of the unit?
•Check if the Drip Tray is not firmly attached.
•Check if the cover of the compressor enclosure in the lower drip tray taken out.
C?
•Plug into the outlet.
•Set the switch to ON.
•Replace the fuse.
•If the voltage is low, correct the wiring.
•Place the unit about 4 inches (10 cm) from the wall.
•Place the unit away from these heat sources.
•Lower the ambient temperature.
•Put in foods after they have cooled down.
•Don't open the door too often and close it firmly.
•Set the control to Recommended position .
•Place foods in the high-temperature section. (front part)
•Set the control to Recommended position .
•Set the control to
•Seal liquid foods with wrap.
•Put in foods after they have cooled down.
•Don't open the door too often and close It firmly.
•Wipe moisture with a dry cloth. It will disappear in low temperature and humidity.
•Fill up the gap.
•Adjust the leveling screw, and position the refrigerator in a firm place.
•Remove the objects.
•Fix the drip tray firmly in the original position.
•Place the cover in its original position.
Warm position
.
Door does not close well.
Ice and foods smell unpleasant.
Other possible problems:
Check if frost forms in the freezer.
Check the refrigeration system.
Check the thermistor
•Check if the door gasket is dirty with an item like juice.
•Is the refrigerator level?
•Is there too much food in the refrigerator?
•Check if the inside of the unit is dirty.
•Are foods with a strong odor unwrapped?
•The unit smells of plastic.
Not defrosting
The system is faulty.
The operation of the thermistor is incorrect.
•Clean the door gasket.
•Position in a firm place and level the
leveling screw.
•Make sure food stored in shelves does not prevent the door from closing.
•Clean the inside of the unit.
•Wrap foods that have a strong odor.
•New products smell of plastic, but this
will go away after 1-2 weeks.
Check components of the defrosting circuit.
Perform sealed system repair.
Check the thermistor
- 19 -
6-5 REFRIGERATION CYCLE
* Troubleshooting Chart
CAUSE
PARTIAL LEAKAGE
LEAKAGE
COMPLETE LEAKAGE
R E S
CLOG
T RC
I T
I
O
CLOG
N
MOISTURE
RESTRICTION
C
NI
O
E
LOW
F
M
F
COMPRESSION
P
I
C
R
I
E
E
S
NO
N
S
T
COMPRE-
OR
SSION
STATE OF
THE UNIT
Freezer compartment and refrigerator don’t cool normally
Freezer compartment and refrigerator don’t cool normally
Freezer compartment and refrigerator don’t cool normally
Freezer compartment and refrigerator don’t cool.
Cooling operation stops periodically.
Freezer and refrigerator don’t cool.
No compressing operation.
STATE OF THE
EVAPORATOR
Low flowing sound of refrigerant is heard and frost forms in inlet only.
Flowing sound of refrigerant is not heard and frost isn’t formed.
Flowing sound of refrigerant is heard and frost forms in inlet only.
Flowing sound of refrigerant is not heard and frost isn’t formed.
Flowing sound of refrigerant is not heard and frost melts.
Low flowing sound of refrigerant is heard and frost forms in inlet only.
Flowing sound of refrigerant is not heard and there is no frost.
TEMPERATURE
OF THE
COMPRESSOR
A little higher than Room temperature.
Equal to room temperature.
A little higher than Room temperature.
Equal to room temperature.
Lower than room temperature.
A little higher than Room temperature.
Equal to room temperature
REMARKS
- Refrigerant level is low due to a leak.
¥
- Normal cooling is possible by restoring the normal amount of
¥
refrigerant and repairing the leak.
¥
- No discharging of refrigerant.
- Normal cooling is possible by restoring the normal amount of
¥
refrigerant and repairing the leak.
¥
- Normal discharging of the refrigerant.
¥
- The capillary tube is faulty.
- Normal discharging of the refrigerant.
¥
- Cooling operation restarts when heating the inlet of the capillary
¥
tube.
¥
- Low pressure at high side of compressor due to low
¥
refrigerant level.
¥
- Nopressure in the high pressure part of the compressor.
¥ ¥
- 20 -
6-5-1 SEALED SYSTEM DIAGNOSIS
All components operating, No airflow problems, Not frosted up as a defrost problem
Problem has been isolated to sealed system area
Not Cooling Complaint
Very Fast
Inefficient
Compressor
Partial
Equalization
Test
Fast
Condenser
Temperature
Room Temperature
Pattern?
Partial
Restriction
Hotter than Normal
Frost
None
Equalization
Test
Very SlowVery Slow
Very Fast
Complete
Restriction
Cap Tube
Sound
Faint
None to Weak
Air/Low Side
Leak
Trace of Oil
Yes
No
Leak
Undercharge
(The equalization test is trying to restart a compressor after it has been operating.)
Loss of Change
Compressor Not
Pumping
- 21 -
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