ELECTRIC & GAS DRYER SERVICE MANUAL - Appliance ...

ELECTRIC & GAS DRYERSERVICE MANUALCAUTION

READ THIS MANUAL CAREFULLY TO DIAGNOSE TROUBLES CORRECTLY BEFORE OFFERING SERVICE.

MODEL : 796.8044*.900 / 796.8044*.900796.9044*.900 / 796.9044*.900

Website:http://www.sears.com

AUG. 2009 PRINTED IN KOREA P/No.:MFL62119909

2

To avoid personal injury, disconnect power before servicing this product. If electrical power is requiredfor diagnosis or test purposes, disconnect the power immediately after performing the necessary checks.

! WARNING !

WHAT TO DO IF YOU SMELL GAS:

IMPORTANT SAFETY NOTICEThe information in this service guide is intended for use by individuals possessing adequate backgrounds

of electrical, electronic, and mechanical experience. Any attempt to repair a major appliance may result inpersonal injury and property damage. The manufacturer or seller cannot be responsible for theinterpretation of this information, nor can it assume any liability in connection with its use.

RECONNECT ALL GROUNDING DEVICESIf 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.

IMPORTANTElectrostatic Discharge (ESD)

Sensitive ElectronicsESD problems are present everywhere. ESD may damage or weaken the electronic

control assembly. The new control assembly may appear to work well after repair isfinished, but failure may occur at a later date due to ESD stress. Use an anti-static wrist strap. Connect wrist strap to green ground connection point or unpainted

metal in the appliance.- OR -

Touch your finger repeatedly to a green ground connection point or unpainted metal in the appliance. Before removing the part from its package, touch the anti-static bag to a green ground connection

point or unpainted metal in the appliance. Avoid touching electronic parts or terminal contacts; handle electronic control assembly by edges only. When repackaging failed electronic control assembly in anti-static bag, observe above instructions.

Do not try to light a match, or cigarette, or turn onany gas or electrical appliance.

Do not touch any electrical switches. Do not use anyphone in your building.

Clear the room, building or area of all occupants.

Immediately call your gas supplier from a neighbor’sphone. Follow the gas supplier’s instructionscarefully.

If you cannot reach your gas supplier, call the firedepartment.

3

CONTENTS

1. SPECIFICATIONS ..................................................................................................................42. FEATURES AND BENEFITS .................................................................................................... 53. INSTALLATION INSTRUCTIONS ............................................................................................ 64. COLUMBUS DRYER CYCLE PROCESS .................................................................................... 95. COMPONENT TESTING INFORMATION ..............................................................................106. MOTOR DIAGRAM AND SCHEMATIC..................................................................................137. CONTROL LAY - OUT .........................................................................................................148. WIRING DIAGRAM ............................................................................................................159. STEAM FUNCTION ............................................................................................................16

9-1. STEAM CYCLE GUIDE .................................................................................................169-2. TROUBLESHOOTING FOR STEAM DRYER ....................................................................179-3. DISPLAY FAULT/ERROR CODES FOR STEAM DRYER .....................................................17

10. DIAGNOSTIC TEST ...........................................................................................................1810-1. TEST 1 120VAC ELECTRICAL SUPPLY ........................................................................1910-2. TEST 2 THERMISTOR TEST --- MEASURE WITH POWER OFF ......................................2210-3. TEST 3 MOTOR TEST ...............................................................................................2310-4. TEST 4 MOISTURE SENSOR ....................................................................................2410-5. TEST 5 DOOR SWITCH TEST ..................................................................................2510-6. TEST 6 HEATER SWITCH TEST - ELECTRIC TYPE..........................................................2610-7. TEST 7 GAS VALVE TEST - GAS TYPE........................................................................27

11. CHANGE GAS SETTING (NATURAL GAS, PROPANE GAS) ...............................................2812. DISASSEMBLY INSTRUCTIONS ..........................................................................................3013. EXPLODED VIEW ..............................................................................................................40

13-1. CONTROL PANEL & PLATE ASSEMBLY .......................................................................4013-2. PANEL DRAWER ASSEMBLY & GUIDE ASSEMBLY ......................................................4113-3. CABINET & DOOR ASSEMBLY ..................................................................................4213-4-1. DRUM & MOTOR ASSEMBLY : ELECTRIC TYPE ........................................................4313-4-1. DRUM & MOTOR ASSEMBLY : GAS TYPE ...............................................................44

1 SPECIFICATIONS

4

ITEM796.8044*.900 / 796.8044*.900 /796.9044*.900 / 796.9044*.900

REMARK

White / Patina Beige

Spray

Color

Top Plate

Door Trim

ELECTRICITYCONSUMPTION

MOTOR

HEATER

LAMP

GAS VALVE

CONTROL TYPE

DRUM CAPACITY

Weight (lbs): Net/Gross

No. of Programs

No. of Dry Option

No. of Temperature Controls

No. of Dry Levels

Audible End of Cycle Beeper

Moisture

Temperature

Reversible Door

Drum

Dryer Rack

Child lock

Interior Light

Product (WXHXD)

Packing (WXHXD)

Sensor

POWER SUPPLY

Material &Finish

Light Gray

120V / 240V 60Hz (26A)

250W (4.5A)

5400W (22.5A)

15W (125mA)

13W (110mA) X 2

Electronic

7.3 cu.ft.

126 / 144

9

5

5

5

High / Low / Off

Equipped

Equipped

Adopted

Double Coated Steel

Equipped

Equipped

Equipped

27" x 38" x 28 1/3"

29 1/2" x 44 3/4" x 30 3/4"

AC 120V

AC 240V ( ELECTRIC TYPE)

AC 120V

AC 120V ( GAS TYPE)

Electro sensor

Thermistor

2 FEATURES AND BENEFITS

5

Apply Model : 796.8044*.900 / 796.8044*.900 / 796.9044*.900 / 796.9044*.900

6

3-1. POWER CORD

INSTALLATION INSTRUCTIONS3

1) 4-wire connection

1. External ground connector - Dotted line showsposition of NEUTRAL ground wire before beingmoved to center terminal block screw

2. Center silver-colored terminal block screw3. Green wire of harness

1. External ground connector2. Green or bare copper wire of power supply cord3. 3/4 in. (1.9 cm) UL-listed strain relief4. Center silver-colored terminal block screw5. Neutral grounding wire (green)6. Neutral wire (white)

5. Connect the other wires to outer terminal blockscrews. Tighten screws.

6. Tighten strain relief screws.

7. Insert tab of terminal block cover into slot of dryerrear panel Secure cover with hold-down screw.

3. Connect ground wire (green or bare) of powersupply cable to external ground conductor screw.Tighten screw.

4. Connect neutral wire (white or center wire) ofpower supply cord to the center, silver coloredterminal screw of the terminal block.

1. 4-wire receptacle (NEMA type 14-30R)2. 4-prong plug3. Ground prong4. Neutral prong5. Spade terminals with upturned ends6. 3/4 in. (1.9 cm) UL approved strain relief7. Ring terminals

1. Remove center terminal block screw.

2. Remove appliance ground wire (green) fromexternal ground connector screw. Fasten it undercenter, silver colored terminal block screw.

IMPORTANT: A 4-wire connection isrequired for mobilehomes and where localcodes do not permit theuse of 3 wire connections.

1 2

3 4 5 7

6

65

3

2

14

31

2

7

2) 3-wire connection

Use where local codes permit connectingcabinet-ground conductor to neutral wire.

1. Remove center terminal block screw.

2. Remove appliance ground wire (green) fromexternal ground connector screw. Connectappliance ground wire and the neutral wire (whiteor center wire) of power supply cord/cable undercenter, silver colored terminal block screw.Tighten screw.


Use where local codes permit connectingcabinet-ground conductor to neutral wire.

3) Optional 3-wire connection

1. Loosen or remove center terminal block screw.

2. Connect neutral wire (white or center wire) ofpower supply cord to the center, silver coloredterminal screw of the terminal block. Tighten screw.

1. External ground connector2. Neutral grounding wire (green)3. Center silver-colored terminal block screw4. Neutral wire (white or center wire)5. 3/4 in. (1.9 cm) UL-listed strain relief



5. Insert tab of terminal block cover into slot of dryerrear panel. Secure cover with hold-down screw.


5. Insert tab of terminal block cover into slot of dryerrear panel. Secure cover with hold-down screw.

6. Connect a separate copper ground wire from theexternal ground connector screw to an adequateground.

1. External ground connector2. Neutral grounding wire (green)3. Neutral wire (white or center wire)4. Grounding path determined by a qualified electrician

1. 3-wire receptacle (NEMA type 10-30R)2. 3-wire plug3. Neutral prong4. Spade terminals with up turned ends5. 3/4 in. (1.9 cm) UL approved strain relief6. Ring terminals7. Neutral (white or center wire)

3

12

4

42

5

13

4

7 6

52

3

1

8

3-2. Connect Gas Supply Pipe (Gas Dryer ONLY)

2

35

1

4

1. Make certain your dryer is equipped for use with thetype of gas in your laundry room. Dryer is equippedat the factory for Natural Gas with a 3/8” N.P.T. gasconnection.

2. Remove the shipping cap from the gas connectionat the rear of the dryer. Make sure you do notdamage the pipe thread when removing the cap.

3. Connect to gas supply pipe using a new flexiblestainless steel connector.

4. Tighten all connections securely. Turn on gas andcheck all pipe connections (internal & external) forgas leaks with a non-corrosive leak detection fluid.

5. For L.P. (Liquefied Petroleum) gas connection, referto section on Gas Requirements.

For further assistance, refer to section on Gas Requirements.

1 New Stainless Steel Flexible Connector - Useonly if allowed by local codes (Use DesignA.G.A. Certified Connector)

2 1/8” N.P.T. Pipe Plug (for checking inlet gas pressure)

3 Equipment Shut-Off Valve-Installed within 6’(1.8 m) of dryer

4 Black Iron PipeShorter than 20’ (6.1 m) - Use 3/8” pipeLonger than 20’ (6.1 m) - Use 1/2” pipe

5 3/8” N.P.T. Gas Connection

4 DRYER CYCLE PROCESS

9

* Sensor dry : “Dry Level” is set by users.** Manual dry : “Temperature control” is set by users.Default settings can be adjusted by users.

Steam Refresh Mid High

Steam Sanitize

Heavy duty

Small Load

Air / Rack dry

70

54

55

41

36

32

30

50

Apply Model : 796.8044*.900 / 796.9044*.900

10

When checking the Component, be sure to turn the power off, and do voltage discharge sufficiently.

COMPONENT TESTING INFORMATION5

! CAUTION

Component Test Procedure Check result Remark

1. Thermal cut off

• Check Top Marking :N130

Measure resistance of terminalto terminal

① Open at 284 ± 12°F(140 ± 7°C)

② Auto reset -31°F (-35°C)Same shape as Outlet Thermostat.

If thermal fuse is open mustbe replaced

① Resistance value ≒ ∞

② Continuity (250°F ↓) < 1Ω

• Heater case-Safety

• Electric type

2. Hi limit Thermostat (Auto reset)


① Open at 257 ± 9°F(125 ± 5°C)

② Close at 221 ± 9°F(105 ± 5°C)


② Resistance value < 5Ω

• Heater case - Hi limit

• Electric type

3. Outlet Thermostat ( Auto reset)



① Open at 185 ± 9°F (85 ± 5°C)

② Close at 149 ± 9°F(65 ± 5°C)

Same shape as Thermal cut off.


② Resistance value < 5Ω

• Blow housing -Safety

• Electric type

4. Lamp holder Measure resistance of terminalto terminal

Resistance value :80Ω ~ 100Ω

6. Idler switch Measure resistance of thefollowing terminal :

“COM - NC”

1. lever open

① Resistance value < 1Ω2. Lever push (close)

② Resistance value ≒ ∞

5. Door switch Measure resistance of thefollowing terminal

1) Door switch knob : open

① Terminal : “COM” - “NC” (1-3)② Terminal : “COM” - “NO” (1-2)

2) Door switch push : push

① Terminal : “COM” - “NC” (1-3)② Terminal : “COM” - “NO” (1-2)

① Resistance value < 1Ω② Resistance value ≒ ∞

① Resistance value ≒ ∞② Resistance value < 1Ω

The state thatKnob ispressed isopposite toOpencondition.

11


7. Heater Measure resistance of thefollowing terminal

① Terminal : 1 (COM) - 2② Terminal : 1 (COM) - 3③ Terminal : 2 - 3

① Resistance value : 10Ω② Resistance value : 10Ω③ Resistance value : 20Ω

• Electric type

8. Thermistor Measure resistance of terminalto terminal

Temperature condition :58°F ~ (10~40°C)58°F ~ 104F (10~40°C)

Resistance value : 10Ω • Heater case - Hi limit

• Electric type

9. Motor • See Page 13

10. Gas valvevalve 1

valve 2

Measure resistance of thefollowing terminal

① Valve 1 terminal② Valve 2 terminal

① Resistance value : > 1.5kg ~② Resistance value :

> 1.5~2.5kg

• Gas type

11. Igniter Measure resistance of terminalto terminal

Resistance value : 100~800Ω • Gas type

12. Frame Detect Measure resistance of terminalto terminal

① Open at 370°F ((Maximum)② Close at 320°F

① Resistance value ≒ ∞② Resistance value < 1Ω

• Gas type

①

②③

12


13. Hi-limit Thermostat(Auto reset)



① Open at 203 ± 7°F (95 ± 5°C)② Close at 158 ± 9°F (70 ± 5°C)

① Resistance value ≒ ∞② Continuity < 1Ω

• Gas type

• Gas funnel-Hi-limit

13. Thermal Cut off(Manual reset)



① Open at 230 ± 12°F(110 ± 7°C)

② Manual reset

If thermal fuse is open mustbe replaced


② Continuity < 1Ω

• Gas type

• Gas funnel-Safety

13

MOTOR DIAGRAM AND SCHEMATIC6

Contact On / Off by Centrifugal Switch

STOP MODE (When Motor does not operate)

RUN MODE (Motor operates)

When checking Component, be sure to turn Power off, then do voltage discharge sufficiently.NOTE

Centrifugal switchCentrifugal switch

(Pull Drive forward)

7 CONROL LAY - OUT

PWB ASSEMBLY DISPLAY LAY-OUT

PWB ASSEMBLY LAY-OUT

14

8 WIRING DIAGRAM

15

ELECTRIC DRYER WIRING DIAGRAM

Label all wires prior to disconnection when servicing controls. Wiringerrors can cause improper and dangrous operation. Verify properoperation after servicing.

GAS DRYER WIRING DIAGRAM

Apply Model : 796.8044*.900 / 796.8044*.900

Apply Model : 796.9044*.900 / 796.9044*.900

!

16

9-1. Steam Cycle Guide

IMPORTANT NOTES ABOUT STEAM CYCLES:

The steam feeder must be filled with water up to the MAX line. Otherwise, an error messagewill be displayed.

If the lint filter or exhaust duct is clogged, the Steam options will not give proper results.

For best results, load articles of similar size and fabric type. Do not overload.

Water only - Do not add any additives or other materials as these will damage your dryer.

Before moving the dryer, make sure the steam feeder is empty.

Best results are obtained with cotton/poly blend fabrics.

STEAMTEMP.

CONTROLDRY

LEVELFABRIC STATE

FABRIC TYPE

MAXIMUM AMOUNT

DEFAULT TIME

9 STEAM FUNCTION

STEAM SANITIZE

STEAM REFRESH

NORMALBULKY/BEDDING

HEAVY DUTYCASUAL,

DELICATESSMALL LOAD

TIMED DRY

+REDUCESTATIC

+REDUCESTATIC

+REDUCESTATIC

39 minutes

20 minutes

10 minutesOnly reduce

static

Followselected

cycle

45 minutes

Dry

Dry

Dry

Wet

Wet

Comforter Bedding

Children’sclothing

Single (1 each)

3 lbs.

ComforterShirts*

Single (1 each)5 each

Shirts* 8 lbs.(18 Items.)

Follow selected

cycle

8 lbs.(18 Items.)

Follow selected

temp

8 lbs.(18 Items.)

17

9-2. Troubleshooting for Steam Dryer

9-3. Display Fault/Error Codes for Steam Dryer

PROBLEM

Water drips from nozzle when Steam Cycle starts.

This is normal.

This is normal.

This is normal.

This is normal.

This is steam condensation. The dripping water will stop after a short time.

The drum does not turn during Steam Cycle.

The drum is turned off and only tumbles intermittently so that the steam vapor remains in the drum.

Can not see steam vapor at the beginning ofcycle.

The display shows: MORE TIMEpressed.

Pressing the MORE TIME button adjusts the load size from 1 to 5 articles or a big load indicated by in the display.

Steam is not visible during Steam Cycle.

This is normal. Steam vapor is difficult to see when the door is closed, although condensation may form on the inside of the door.

Steam is released at different stages of the cycle for each option. Steam will not normally be visible, although condensation may form on the inside of the door.

Top plate of the dryer is very warm.

Top plate gets very warm during steam operation.

SOLUTIONSPOSSIBLE CAUSES

The error codes below will be displayed when attempting to start a dryingcycle, or after activating the Diagnostic Test mode.

tE4

E1

E3

E4

E5

Thermistor ofsteam generator

Steam generator thermistor open or shorted. tE4 error is only displayed in the test mode. Replace the steam generator.

If water in the steam feeder is less than about 2/3 full, this error may be displayed. Fill the feeder and restart the cycle.

Steam generator element is not heating and generator may need to be replaced.

E5 error is only displayed in the test mode. Replace the steam feeder pump.

Check the hose and nozzle for clogging. CAUTION: The hose and nozzle will be extremely hot during and immerdiately after steam operation.

Steam generator temperature exceeds 116 deg for more than 3 seconds. Steam hose or nozzle is clogged.

Sensors do not detect that steam generatoris full within 60 seconds.

Steam generator temperature does not rise 4∞C every 2 minutes or the temperature is less than 80∞C for 3 secondsafter steam temperature has been reached.

When the AD value of the pump less than 10 in the test mode.

Steam generator

Steam generator

Steam generator

Pump

DISPLAY CAUSE REMARKCHECKING PART

18

ACTIVATING THE DIAGNOSTIC TEST MODE1. UNIT must be in standby (unit plugged in, display off)

2. Press POWER while pressing MORE TIME and LESS TIME simultaneously.

3. Press START/PAUSE button to advance through diagnostics.

To check pump operation:When pressed 4 times in the test mode, If the AD value of the pump is higher than 10 on the display, the pump is normal. If it is lower than 10, E5 error will be displayed.

DIAGNOSTIC TEST101. This TEST should be used for Factory test /Service test. Do not use this DIAGNOSTIC TEST other than specified.

2. Activating the Heater manually with the Door open may trip the Thermostat attached to the Heater, therefore do not activate itmanually. (Do not press the door switch to operate the heater while the door is open )

CHECKING DISPLAY CHECKPOINTACTION

Pressing the START/PAUSE

8E9(Elec Type)898(Gas Type)

Standard

Displays Moisture Sensor Operation :

ELECTRIC TYPE: Heater 1 and heater 2 are energized - 5400 W

GAS TYPE: Gas valve is energized (Temperature in the drum is displayed in degrees C.)

If moisture sensor is contacted with damp cloth. The display number isbelow 180 in normal condition

Current Temp.(5~70)

ELECTRIC TYPE Heater 1 is energized - 2700 W

GAS TYPE Valve runs(Temperature in the drum is displayed in degrees C.)

Current Temp.(5~70)

11 = Lowpump*

255 = Highpump*

Electric control &

Temperature sensorNone

30 = Lowmoisture

239 = Highmoisture

Motor+ControllerOnce

4 times

V00 PGM Ver (8E8-V008E8)Thermistor open

tE2 Thermistor shortedtE4 AG Thermistor open or shorted

tE1

Motor runs

Pump runs

Power off

Twice

ELECTRIC TYPE Motor+Heater1(2700W)

GAS TYPEMotor+Gas valve

3 times

ELECTRIC TYPE Motor+Heater1+Heater2 (5400W)

GAS TYPEMotor+Gas valve

Motor,Pump,Heater2 offLoads, Controller off

Motor+Pump+Heater2(runs for 1sec)

(Heater1 off)

OOE5 Pump Error

5 times6 times

19

With the dryer plugged in, press thePOWER button to turn on dryer.

Replace the power cord.

Check the voltage at the main PCBbetween WH1-1 (WH) and the blackwire on the black tab relay. Is 120VAC present while pressing the startbutton?

(NOTE: For gas dryers skip this step.)With the dryer plugged in, check thevoltage at the terminal block betweenthe neutral (WH) and L1 (BK)terminals. Is the voltage 120 VACwhile pressing the START/PAUSEbutton?

With the dryer plugged in, check thevoltage at the power cord plugbetween the neutral and L1 (and L2for electric dryers). Is the voltage 120VAC while pressing theSTART/PAUSE button?

•Replacemain PCB.

•ReplacedisplayPCB.

•Checkpower cord.

•Checkterminalblockconnections.

•Check thepowersupply fuseor circuitbreaker.

•Check thereceptacleconnections.YES

YES

NO

NO

NO

YES

YES

NOTE: To properly check power supply in case of floating neutral or high resistance connections, a load must be applied to the circuit. It isimportant that the power button be pressed while checking the voltages asdescribed below.

Test 1 120V AC Electrical supply

20

Caution

Trouble Symptom

2. Status Mode Of The Connection

1.Power Connection

Measurement Condition

When measuring power, be sure to wear insulated gloves, to and avoid anelectric shock.

Check the Tab Relays Connection properly.

With Dryer Power On; Connector linked to Controller.

T a

T a

Trans

Tab Relay 1 Tab Relay 2

B R

HighMid HighMedium

HighMid HighMedium

Temperature Control below 68±4°C.Turn on Heater1 and Heater2.

Temperature Control below 70±4°C.Turn on Burner

Temperature Control below 47±4°C.Turn on Burner

Temperature Control below 52±4°C.Only Turn on Heater1.

on

on

O O

OO

onoff off

on on on

LowExtra Low

PCB ASSEMBLY LAYOUTLowExtra Low

T a R

Connector Housing

Black

Check the Matching color Between Harness wire and Tab Relay.(Black Housing – Black Tab Relay)

Check the Matching color Between Harness wire and Tab Relay.(White Housing – White Tab Relay)

White

Color

< Table1 > : Connection of the Tab Relay with Heater (Elec)

< Table 2 > : Connection of the Tab Relay with Burner (Gas)

< Table1 > : Connection of Tab Relay with the Tab Relay of the PCB ASSEMBLY (Elec)

Harness

ConnectionRemark

PCB

1

2

Yellow Wire

Black Wire

Connector Housing Tap relay 1

Tap relay 2

1

2

Blue Wire

Black Wire

Connector Housing

21

3. Status Mode Of wrong Connection

1.Black and White Housing

2.Black Housing

3.White Housing



Off

Off

Normal

Heater2

Off

Off

Off

Normal

Heater1

Off

Power Off

Power Off

Power On

Power On

Power Off

Wire ①, ② CROSS

Wire ①, ② CROSS

Wire ①, ② CROSS

Housing CROSS

Housing and Wire ①, ②CROSS

Items CaseHeater1

Operation(black)Heater2

operation(White) PCB condition Of operation

1.Black and White Housing Off Off Power OffWire ①, ② CROSS

Items CaseHeater1

Operation(black)Heater2

operation(White) PCB condition Of operation

- In case of power failure(<Table1>-1,2,5,<Table2>-1), Please check the Connection of “2.Status Table of Connection”. In case of power failure(<Table1>-4), please check the Connection of “2. Status Table of Connection”. Because improper

Connection of the equipment-dryer can be damaged of changing heater.

! CAUTION

Connector Housing Black

Check the Matching color Between Harness wire and Tab Relay.(Black Housing – Black Tab Relay)

Color

< Table 2 > : Connection of Tab Relay with PCB ASSEMBLY (Gas)

< Table1 > : Wrong Connection of the Tab Relay and Connector Housing (Elec)

< Table2 > : Wrong Connection of the Tab Relay and Connector Housing (Gas)

Harness RemarkPCB

Tap relay 1

1

2

Blue Wire

Black Wire

Connector Housing

22

Disconnect the thermistorfrom the harness connectorand measure the resistanceof the thermistor. Does theresistance measured matchthe temperature of thethermistor in the chart? (Useroom temperature unless thethermistor is warm fromrunning the dryer.)

•Measure resistance of all wires. Resistance should be < 0 Ω. •Check all thermistor harness connectors for corrosion, loose/bent pins,broken wires, etc.

•Check all harness wires for cuts, or broken wires.

Measure the resistance betweenthe NA6-1 (RD) and NA6-4 (BL).Does the resistance measuredmatch the temperature of thethermistor in the chart? (Useroom temperature unless thethermistor is warm from runningthe dryer.)

Disconnect the NA6connector from the mainPCB.

Measure the resistancebetween the NA6-6 (GN) pinand a chassis ground screw.Is the resistance <1 Ω ?

•Replace themain PCB

•Check allwiring harnessconnections,wires andgroundscrews.

•Replace thethermistor

Test 2 Thermistor Test---Measure with Power Off

YES

NO

YES

NO

NO

YES

23

• Replace the outletthermal fuse.

• Check the thermistor(test # 3).

• Check exhaustsystem for restrictions.

With the connectors disconnected,check the resistance between theterminals of the thermal fuse on theblower housing. Is the resistance 0Ω ?

YES

NO

Is the arm of the idler pulleycontacting the belt switch lever?(Normal operating position is NOCONTACT.)

With the connectors disconnected, checkthe resistance between terminals 1 and 2(N.O.) of the belt switch on the motormount. Is the resistance <1 Ω with noswitch contact?

•Check idler pulleyand arm.

•Check drum beltcondition(stretched/broken)

•Check drum beltrouting

•Replace the beltswitch.

• Check Motor. (Refer to MOTOR DIAGRAM AND SCHEMATIC.)• Check if control connector is plugged in.

YES

YES

NO

•Recheck voltage atmain PCB andreplace if novoltage.

With the connectors disconnected,check the resistance between BL2-1(BN) and BL3-3 (YL). Is theresistance 2-4 Ω ?

Measure with the door closed.

YES

NO

With the connectors disconnected,check the resistance between WH1-1 (WH) and BL3-2 (BN). Is theresistance 2-4 Ω ?


In diagnostic test mode, press theSTART / PAUSE button. Is thevoltage 120 VAC between WH1-1(WH) and BL3-1 (BN)?

•Recheck voltage atmain PCB andreplace if novoltage.

•Replace mainPCB

YES

YES

NO

NO

YES

•Check door switchactivation.

•Check wiringharness andconnections.

•See DOORSWITCH TEST #5.

With the connectors disconnected,check the resistance between WH1-1 (WH) and BL3-3 (YL). Is theresistance 0 Ω ?


NO

Test 3 Motor test

24

Disconnect the NA6 connectorfrom the main PCB. Measurethe resistance between theNA6-6 (GN) pin and a chassisground screw. Is the resistance<1 Ω ?

Put a jumper between NA6-2(OR) and NA6-4 (BL) to createa circuit connection for thecontinuity test in the next step.

Measure the resistancebetween the two moisturesensor bars on the in the lintfilter housing inside the drum.Is the resistance <1 Ω?

Check all connections andwires between the NA6terminal at the main PCB andthe sensor bars. Check theresistance is 0Ω.

•Measure the resistance of all wires.Resistance should be < 1 Ω.

•Check all sensor harness connectors forcorrosion, loose/bent pins, broken wires,etc.

•Check all harness wires between the mainPCB and the sensor for cuts, or brokenwires.

•Check allwiringharnessconnections,wires andgroundscrews.

•Replace themain PCB.

Test 4 Moisture sensor

YES

YES

YES

YES

NO

NO

25

Disconnect the WH1 and BL3connector from the main PCB.Measure the resistance betweenthe NA6-6 (GN) pin and a chassisground screw. Is the resistance <1Ω ?

Disconnect the WH1 and BL3connector from the main PCB.Measure the resistance betweenWH1-1 (WH) and BL3-3 (YL). Is theresistance < 1 Ω with the doorclosed and Ω with the dooropen?

*Skip this step if the dryer does nothave a drum light.Disconnect the BL3 and the blacktab relay connectors from the mainPCB. Measure the resistancebetween BL3-3 (YL) and the BK wireon the black tab relay connector. Isthe resistance <1 Ω with the dooropened and Ω with the doorclosed?

Refer to the individual door switch and lightbulb/socket component tests.

•Replace themain PCB.

•Replace thelight bulb.

•Replace thelight socket.

3

BL3

Test 5 Door switch test

YES

YES

NO

NO

NO

26

Test 6 Heater switch test - Electric Type

Disconnect the YL3, black tabrelay and white tab relayconnectors at the main PCB.Measure the resistance betweenYL3-1 (WH) and the YL wire onthe black tab relay connector. Isthe resistance 18-22 Ω ?

Measure the resistance betweenYL3-1 (WH) and the BL wire onthe white tab relay connector. Isthe resistance 18-22 Ω ?

•Check wiring andconnectors to theelement.

•See elementcomponent test.





•Check powersupply.

•Replace theelement.

Measure the resistance betweenthe YL wire on the black tab relayand the BL wire on the white tabrelay connectors. Is theresistance 36-44 Ω ?

Measure the resistance betweenterminals 1 (RD) and the heaterhousing. Is the resistance Ω ?

Refer to the hi-limit thermostat and thermal cutoff component tests.

Enter diagnostic mode and pressthe START/PAUSE button twice.Measure the voltage betweenYL3-1(WH) and the YL wire onthe black tab relay. Is thevoltage 240 VAC?

YL3

YES

YES

YES

YES

YES

NO

NO

NO

NO

NO

27

• Check wiring and connectorsto gas valve.

• See gas valve componenttest.

• Check wiring and connectorsto gas valve.

• See gas valve componenttest.

• Check wiring and connectorsto flame sensor.

• See flame sensor componenttest.

• Check wiring and connectorsto the ignitor

• See ignitor component test

Disconnect the BL3 Connectorfrom the main PCB and measurethe resistance between BL3-1(RD) and BL3-2 (PK). Is theresistance 1.5k-2.5k Ω ?

Measure the resistance betweenBL3-1 (RD) and BL3-3 (WH). Isthe resistance 1.5k-2.5k Ω ?

Disconnect the YL3 connectorfrom the main PCB. Measurethe resistance between YL3-1(GY) and YL3-3 (BL). Is theresistance <1 Ω ?

The flame sensor is closed and the ignitor is OK. • Perform the functional test above.• Check all wiring and connectors to gas valve components.• Check gas supply.

BL3

YL2

Measure the resistance betweenYL3-3 (BL) and the blue wire onthe black tab relay. Is theresistance 100-800 Ω ?

Test 7 GAS Valve test - Gas Type

YES

YES

YES

YES

NO

NO

NO

NO

28

After Natural Gas Setting, applying Propane Gas Orifice or wrong use of Natural GasOrifice will result in fire. Conversion must be made by a qualified technician.

Initially, Natural Gas mode is set. Propane Gas Orifice is on sale as a Service

Part to authorized servicers only.

CHANGE GAS SETTING (NATURAL GAS, PROPANE GAS)11

! Warning

STEP 1 : VALVE SETTING

Full open“Change screw”

STEP 2 : ORIFICE CHANGE

Orifice

Gas type

Natural Gas

Propane Gas

Marking

NCU

PCU

ShapeOrifice P/No

4948EL4001B

4948EL4002B

Close“Change screw”

① Remove 2 screws.② Disassemble the pipe assembly.③ Replace Natural Gas orifice with Propane Gas orifice.

※ Kit contents : Orifice (Dia. = 1.613mm, for Propane Gas): Replace Label: Instruction sheet

29

GAS VALVE FLOW

GAS IGNITION GAS VALVE STRUCTURE

START KEY PUSH

VALVE 1 ON (VALVE 2 OFF)

IGNITER ON

IGNITERTEMPERATURE ABOUT

2499°F(1343°C)

FLAME DETECT OPENIGNITER OFF 374°C(190°C)

VALVE 2 ON

GAS IGNITION

DRYING VALVE 2 OFF

FLAME DETECT CLOSE

NO

NO

YES

YES

START

ON

ON

ON

GAS IGNITION

CLOSE OPEN

OFF

OFF

VALVE 1

IGNITER

VALVE 2

FLAMEDETECT

30

Disassemble and repair the unit only after pulling out power plug from the outlet.

1. Remove 1 screw on the safety guard.

2. Remove 3 screws on the upper plate.

TOP PLATE

3. Push the top plate backward.

4. Lift the top plate

When you disassemble the top plate,be sure to take gloves and carefulplates edge. Failure to do so cancause serious injury.

WARNING !

12 DISASSEMBLY INSTRUCTION

31

1. Pull out the drawer

2. Lift out the water tank.

3. Remove 2 screws on the control panel.

32

1. Remove 1 screw on the control panel frame.

2. Disconnect the connectors.

3. Pull the control panel assembly upward andthen forward.

4. Remove 8 screws on the PWB(PCB)assembly, display.

5. Disassemble the control panel assembly.

When you disassemble the control panel, besure to take gloves and careful panel framesedge. Failure to do so can cause serious injury.

! WARNING !

33

COVER CABINET

1. Disassemble the top plate.

2. Disassemble the control panel assembly.

3. Disassemble the door assembly.

4. Remove 2 screws.

5. Remove 4 screws from the top of cabinet cover.

6. Disconnect the harness of door switch.

34

1. Remove 2 screws on the frame body.

2. Push the Guide ASM to the back sideand then lift it.

3. Separate hoses from the pump andgenerator.

4. Lift a pump and a generator up.

35

1. Remove 4 screws on the frame bodyand then disassemble the frame body.

2. Remove 4 screws on the panel frameand then disassemble the panel frame.

36

1. Open the top plate.

2. Remove Cover Cabinet.

3. Disconnect the door lamp and electro sensor connector.

4. Remove 4 screws.

5. Disassemble the Tub Drum [Front].

TUB DRUM [FRONT]


2. Remove the Cover Cabinet and Tub drum [front].

3. Disengage belt from motor and idler pulleys.

4. Carefully remove Drum out through front of dryer.

DRUM ASSEMBLY

-1

-2

-1

1. Open the door.

2. Remove the screw holding the drum lamp shieldin place.

3. Slide the shield up and remove.

4. Remove the bulb and replace with a 15 watt, 120 volt candelabra-base bulb.

5. Replace the lamp shield and screw.

CHANGING THE DRUM LAMP

When you disassemble the lamp connector, besure to take gloves and careful cabinet edge.Failure to do so can cause serious injury.

! WARNING !

37

1. Remove screw & exhaust duct.

DRYER EXHAUST CHANGE

PORTION “A”

DUCTTAPE

DUCTTAPE

DUCTTAPE

3. Reconnect the new duct[11 in(28cm)] to theblower housing, and attach the duct to the base.

2. Detach and remove the bottom, left or right sideknockout as desired.

4. Pre-assemble 4" elbow with 4" duct. Wrap duct tape around joint.

5. Insert duct assembly, elbow first, through the sideopening and connect the elbow to the dryerinternal duct.

When you disassemble and install ventilation, besure to take gloves and careful exhaust edge.Failure to do so can cause serious injury.

! WARNING !

38

1. Remove the filter.

2. Remove 3 screws.

3. Pull the grill.

4. Disconnect electro sensor.

FILTER ASSEMBLY


2. Remove the Cover Cabinet and Tub Drum [Front].

3. Remove the Drum assembly.

4. Remove 2 screws and cover(Air guide).

5. Remove the bolt and washer.

6. Pull the fan.

7. Disconnect the motor clamp and motor.

BLOWER HOUSING



3. Remove the Drum assembly.

4. Remove 7 screws.

5. Pull the Tub Drum [Rear] towards the front.

BACK COVER

39


2. Remove the Cover Cabinet.

3. Remove filter and 2 screws.

4. Pull the air duct towards the front.

AIR DUCT



3. Remove the Drum assembly and Tub Drum [Rear].

4. Disconnect Air duct from the Tub Drum [Front].

5. Remove the roller from the Tub Drum [Front] and Tub Drum [Rear].

ROLLERS

40

13-1. Control Panel & Plate Assembly

A210

A211

A130

A110

A120

A140

13 EXPLODED VIEW

41

13-2. Panel Drawer Assembly & Guide Assembly

K505

K507

A360

A172

A171

A350

K501

K502K508

K506

A090

A160

A170

A161

A162

K503

K504

42

13-3. Cabinet & Door Assembly

A600

A305

A320

A300

A310

A700

A390 A800

A590

A570

A330

A500

A510

A460A410A450

A430

A420

A400

A530

A560

A525

A540

A520

A550

43

13-4-1. Drum & Motor Assembly: Electric Type

K640

K120

K140

K400 K420 K410 F200

K310

K610

K330 K340

K130

K100

K221

K222

K210

K350

K240

F120

F130

F110

F140K510K540

K650

K651

K600

K520

K550 K560

K620

K530

K320

K251

K360

K251

K230

K250

K250

44

13-4-2. Drum & Motor Assembly: Gas type

M210

M180

M160

M170

M171

M140

M240M150 022M141M

M230M110

M181 M250

M190

K640

K120

K140

K310

K610

K330 K340

K130

K100

K221

K222

K210

K350

K240

K510K540

K650

K651

K600

K520

K550 K560

K620

K530

K320

K251

K360

K251

K230

K400 K420 K410 F200

K250

K250

M171: Propane Gas orificeM170: Natural Gas orifice

ELECTRIC & GAS DRYER SERVICE MANUAL - Appliance ...

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