Kenmore 796.9031*.900, 796.9027*.900, 796.9002*.900, 796.8031*.900, 796.8027*.900 Service Manual

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ELECTRIC & GAS DRYER

SERVICE MANUAL

CAUTION

READ THIS MANUAL CAREFULLY TO DIAGNOSE

TROUBLES CORRECTLY BEFORE OFFERING SERVICE.

MODEL : 796.8002*.900 / 796.8027*.900 / 796.8031*.900 / 796.9002*.900 / 796.9027*.900 / 796.9031*.900

AUG. 2009 PRINTED IN KOREA	P/No.:MFL62119905

IMPORTANT SAFETY NOTICE

The 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 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.

! WARNING !

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

RECONNECT ALL GROUNDING DEVICES

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.

WHAT TO DO IF YOU SMELL GAS:

■Do not try to light a match, or cigarette, or turn on any gas or electrical appliance.

■Do not touch any electrical switches. Do not use any phone in your building.

■Clear the room, building or area of all occupants.

■Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions carefully.

■If you cannot reach your gas supplier, call the fire department.

IMPORTANT

Electrostatic Discharge (ESD)

Sensitive Electronics

ESD problems are present everywhere. ESD may damage or weaken the electronic control assembly. The new control assembly may appear to work well after repair is finished, 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.

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CONTENTS

1. SPECIFICATIONS .................................................................................................................	4
2. FEATURES AND BENEFITS ...................................................................................................	5
3. INSTALLATION INSTRUCTIONS ...........................................................................................	6
4. COLUMBUS DRYER CYCLE PROCESS ...................................................................................	9
5. COMPONENT TESTING INFORMATION ..............................................................................	10
6. MOTOR DIAGRAM AND SCHEMATIC..................................................................................	13
7. CONTROL LAY - OUT .........................................................................................................	14
8. WIRING DIAGRAM ............................................................................................................	15
9. DIAGNOSTIC TEST .............................................................................................................	16
9-1. TEST 1 120VAC ELECTRICAL SUPPLY..........................................................................	17
9-2. TEST 2 THERMISTOR TEST --- MEASURE WITH POWER OFF .......................................	20
9-3. TEST 3 MOTOR TEST ................................................................................................	21
9-4. TEST 4 MOISTURE SENSOR .....................................................................................	22
9-5. TEST 5 DOOR SWITCH TEST ....................................................................................	23
9-6. TEST 6 HEATER SWITCH TEST - ELECTRIC TYPE...........................................................	24
9-7. TEST 7 GAS VALVE TEST - GAS TYPE.........................................................................	25
10. CHANGE GAS SETTING (NATURAL GAS, PROPANE GAS) ...............................................	26
11. DISASSEMBLY INSTRUCTIONS ..........................................................................................	28
12. EXPLODED VIEW ..............................................................................................................	35
12-1. CONTROL PANEL & PLATE ASSEMBLY.......................................................................	35
12-2. CABINET & DOOR ASSEMBLY...................................................................................	36
12-3-1. DRUM & MOTOR ASSEMBLY : ELECTRIC TYPE ........................................................	37
12-3-2. DRUM & MOTOR ASSEMBLY : GAS TYPE ...............................................................	38

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1SPECIFICATIONS

	ITEM					796.8002*.900 / 796.8027*.900 / 796.8031*.900 /	REMARK
						796.9002*.900 / 796.9027*.900 / 796.9031*.900
	Material &				Color	White / Patina Beige
				Top Plate		Spray
	Finish
				Door Trim		Light Gray
	POWER SUPPLY					120V / 240V 60Hz (26A)
					MOTOR	250W (4.5A)	AC 120V
	ELECTRICITY				HEATER	5400W (22.5A)	AC 240V ( ELECTRIC TYPE)
	CONSUMPTION				LAMP	15W (125mA)	AC 120V
					GAS VALVE	13W (110mA) X 2	AC 120V ( GAS TYPE)
	CONTROL TYPE					Electronic
	DRUM CAPACITY					7.1 cu.ft.
	Weight (lbs): Net/Gross					126 / 144
	No. of Programs					9
	No. of Dry Option					5
	No. of Temperature Controls					5
	No. of Dry Levels					5
	Audible End of Cycle Beeper					High / Low / Off
	Sensor			Moisture		Equipped	Electro sensor
			Temperature			Equipped	Thermistor
	Reversible Door					Adopted
	Drum					Double Coated Steel
	Dryer Rack					Equipped
	Child lock					Equipped
	Interior Light					Equipped
	Product (WXHXD)					27" x 38" x 28 1/3"
	Packing (WXHXD)					29 1/2" x 44 3/4" x 30 3/4"

4

2FEATURES AND BENEFITS

Apply Model : 796.8002*.900 / 796.8027*.900 / 796.8031*.900

Apply Model : 796.9002*.900 / 796.9027*.900 / 796.9031*.900

5

3	INSTALLATION INSTRUCTIONS

3-1. POWER CORD

1) 4-wire connection

IMPORTANT: A 4-wire connection is required for mobile homes and where local codes do not permit the use of 3 wire connections.

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

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

1

2

6

3

4

5

7

1.4-wire receptacle (NEMA type 14-30R)

2.4-prong plug

3.Ground prong

4.Neutral prong

5.Spade terminals with upturned ends

6.3/4 in. (1.9 cm) UL approved strain relief

7.Ring terminals

1.Remove center terminal block screw.

2.Remove appliance ground wire (green) from external ground connector screw. Fasten it under center, silver colored terminal block screw.

	1	2
		3

	1	4
		5
	2
		6
	3

1.External ground connector

2.Green or bare copper wire of power supply cord

3.3/4 in. (1.9 cm) UL-listed strain relief

4.Center silver-colored terminal block screw

5.Neutral grounding wire (green)

6.Neutral wire (white)

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

6.Tighten strain relief screws.

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

1.External ground connector - Dotted line shows position of NEUTRAL ground wire before being moved to center terminal block screw

2.Center silver-colored terminal block screw

3.Green wire of harness

6

2) 3-wire connection

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

1	2	4	5
3			7	6

1.3-wire receptacle (NEMA type 10-30R)

2.3-wire plug

3.Neutral prong

4.Spade terminals with up turned ends

5.3/4 in. (1.9 cm) UL approved strain relief

6.Ring terminals

7.Neutral (white or center wire)

1.Loosen or remove center terminal block screw.

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

1	3
2	4
5

1.External ground connector

2.Neutral grounding wire (green)

3.Center silver-colored terminal block screw

4.Neutral wire (white or center wire)

5.3/4 in. (1.9 cm) UL-listed strain relief

3.Connect the other wires to outer terminal block screws. Tighten screws.

4.Tighten strain relief screws.

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

3) Optional 3-wire connection

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

1.Remove center terminal block screw.

2.Remove appliance ground wire (green) from external ground connector screw. Connect appliance ground wire and the neutral wire (white or center wire) of power supply cord/cable under center, silver colored terminal block screw. Tighten screw.

3.Connect the other wires to outer terminal block screws. Tighten screws.

4.Tighten strain relief screws.

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

6.Connect a separate copper ground wire from the external ground connector screw to an adequate ground.

1	2
	3

4

1.External ground connector

2.Neutral grounding wire (green)

3.Neutral wire (white or center wire)

4.Grounding path determined by a qualified electrician

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

For further assistance, refer to section on Gas Requirements.

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

2.Remove the shipping cap from the gas connection at the rear of the dryer. Make sure you do not damage the pipe thread when removing the cap.

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

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

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

1

2

5 3

4

1	New Stainless Steel Flexible Connector - Use	4	Black Iron Pipe
	only if allowed by local codes (Use Design		Shorter than 20’ (6.1 m) - Use 3/8” pipe
	A.G.A. Certified Connector)		Longer than 20’ (6.1 m) - Use 1/2” pipe
2	1/8” N.P.T. Pipe Plug	5	3/8” N.P.T. Gas Connection
	(for checking inlet gas pressure)

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

8

4DRYER CYCLE PROCESS

Apply Model : 796.8002*.900 / 796.8027*.900 / 796.8031*.900

796.9002*.900 / 796.9027*.900 / 796.9031*.900

*Sensor dry : “Dry Level” is set by users.

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

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5 COMPONENT TESTING INFORMATION

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

Component	Test Procedure	Check result	Remark
1. Thermal cut off	Measure resistance of terminal	If thermal fuse is open must	• Heater case-
	to terminal	be replaced	Safety
	Open at 284 ± 12°F	Resistance value ∞	• Electric type
	(140 ± 7°C)
• Check Top Marking :	Auto reset -31°F (-35°C)	Continuity (250°F ↓) < 1Ω
	Same shape as Outlet Thermostat.
N130
2. Hi limit Thermostat	Measure resistance of terminal		• Heater case -
(Auto reset)	to terminal		Hi limit
	Open at 257 ± 9°F	Resistance value ∞	• Electric type
	(125 ± 5°C)
	Close at 221 ± 9°F	Resistance value < 5Ω
	(105 ± 5°C)
3. Outlet Thermostat	Measure resistance of terminal		• Blow housing -
( Auto reset)	to terminal		Safety
	Open at 185 ± 9°F	Resistance value ∞	• Electric type
	(85 ± 5°C)
	Close at 149 ± 9°F	Resistance value < 5Ω
• Check Top Marking :	(65 ± 5°C)
N85	Same shape as Thermal cut off.
4. Lamp holder	Measure resistance of terminal	Resistance value :
	to terminal	80Ω ~ 100Ω

5. Door switch	Measure resistance of the		The state that
	following terminal		Knob is
	1) Door switch knob : open		pressed is
	Terminal : “COM” - “NC” (1-3)	Resistance value < 1Ω	opposite to
			Open
	Terminal : “COM” - “NO” (1-2)	Resistance value ∞
			condition.
	2) Door switch push : push
	Terminal : “COM” - “NC” (1-3)	Resistance value ∞
	Terminal : “COM” - “NO” (1-2)	Resistance value < 1Ω
6. Idler switch	Measure resistance of the	1. lever open
	following terminal :	Resistance value < 1Ω
	“COM - NC”	2. Lever push (close)
		Resistance value ∞

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Component	Test Procedure	Check result	Remark
7. Heater	Measure resistance of the		• Electric type
	following terminal
	Terminal : 1 (COM) - 2	Resistance value : 10Ω
	Terminal : 1 (COM) - 3	Resistance value : 10Ω
	Terminal : 2 - 3	Resistance value : 20Ω
8. Thermistor	Measure resistance of terminal	Resistance value : 10Ω	• Heater case -
	to terminal		Hi limit
	Temperature condition :		• Electric type
	58°F ~ (10~40°C)
	58°F ~ 104F (10~40°C)

9. Motor			• See Page 13
10. Gas valve	valve 1	Measure resistance of the	• Gas type
		following terminal
		Valve 1 terminal	Resistance value : > 1.5kg ~
		Valve 2 terminal	Resistance value :
			> 1.5~2.5kg
	valve 2

11. Igniter	Measure resistance of terminal Resistance value : 100~800Ω • Gas type
	to terminal

12. Frame Detect	Measure resistance of terminal	• Gas type
	to terminal
	Open at 370°F ((Maximum)	Resistance value ∞
	Close at 320°F	Resistance value < 1Ω

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