LG EM430S User manual

BUILT-IN OVEN
SERVICE MANUAL
MODEL: EM430S
CAUTION
BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
Website: http://biz.lgservice.com
P/NO : MFL30426714
July, 2009
Printed in Korea
삼흥
정판
Internal Use Only

1-1
SAFETY PRECAUTIONS
• This oven must only be installed by a licensed electrician.
• The installer is responsible for the correct electrical connection of the appliances and the
observance of the relative safety recommendations.
• This oven should always be earthed.
Electrical Safety
If the oven has been damaged in transport, do not connect it.
• This appliance must be connected to the mains power supply by a specially licensed
electrician only.
• In the event of a fault or damage to the appliance, and do not attempt to operate it.
• Repairs of the appliance should be carried out by a licensed technician only. Wrong
repairs may result in considerable danger. If you need repairs, contact an LG Service
Center or your dealer.
• If the supply cord is damaged, it must be replaced by the manufacturer, its service agent
or similarly qualified persons in order to avoid a hazard.
• Electrical leads and cables should not be allowed to touch the oven.
• The oven should be connected to the electricity supply by means of an approved circuit
breaker or fuse.
Never use multiple plug adapters or extension leads.
• Rating plate is located on the left side of door and the back cover.
• The power supply of the appliance should be turned off when it is being repaired or
cleaned.
• Be careful in connecting electrical appliances to sockets near to this appliance.
WARNING: The appliance should be isolated at the mains before replacing the lamp to
avoid the possibility of electric shock.
WARNING: When the oven operates, the interior parts will be very hot.
WARNING: Accessible parts may become hot during use. Young children should be
kept away.
WARNING: Accessible parts may become hot when the grill is in use. children should
be kept away.
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Only for training and service purposes

1-2
SAFETY PRECAUTIONS
Safety during Operation
• This oven has been designed only for the cooking of household foods.
• When in use, the oven interior surfaces become very hot!
Care should be taken to avoid touching heating elements inside the oven.
• Never store flammable or easily deformable materials in the oven.
• The oven surfaces will become hot when the appliance is operated at a high temperature
for a long period of time.
• Excess spillage should be removed before self cleaning and all shelving should not be left
in the oven during pyrolytic self-cleaning.
• During self cleaning the surfaces get hotter than usual and children should be kept a safe
distance.
• When cooking, take care when opening the oven door as hot air and steam will escape
rapidly.
• When cooking dishes that contain alcohol, the alcohol can evaporate due to the high
temperatures. The vapour can catch fire if it comes into contact with a hot oven part.
• Do not use high-pressure water cleaners or steam jet cleaners for safety reasons.
• Children should be kept at a safe distance when the oven operates.
• Frozen foods such as pizzas should be cooked on the wire grill.
If the Baking tray is used, it may become deformed due to the great difference in
temperature.
• Don’t pour water into the oven bottom when it is hot.
This could cause damage to the enamel surfaces.
• The oven door must be closed when cooking.
• Don’t spread aluminium foil on the bottom of the oven and do not place any baking trays or
tins on it.
The aluminium foil blocks the heat, which may result in damage to the enamel surfaces and
cause poor cooking results.
• Dripping fruit juices from the baking tray will leave stains, which become indelible. When
cooking very moist cakes, use the deep pan.
• Do not use the oven door as a rest table for hot or cold cookwares.
• This appliance is not intended for use by young children or infirm persons unless they have
been adequately supervised by a responsible person to ensure that they can use the
appliance safety.
• Young children should be supervised to ensure that they do not play with the appliance.
LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes

1-3
SAFETY PRECAUTIONS
Disposing of packaging material
• The appliance’s packaging is recyclable.
• Dispose of the packaging materials in the appropriate container at your local waste disposal
facilities.
Disposal of old appliances
WARNING: Before disposing of old appliances please make them inoperable so that
they cannot be the source of danger.
To do this, disconnect the appliance from the main supply and remove the main lead.
To protect the environment, it is important that worn-out appliances are disposed of in the
correct manner.
• The appliance must not be disposed of with household rubbish.
• You can obtain information about collection dates or public refuse disposal sites from your
local refuse department or council.
LGE Internal Use OnlyCopyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes

2-1
CONTENTS
SAFETY PRECAUTIONS ----------------------------------------------------------------------------------------------------------- 1-1
CONTENTS
----------------------------------------------------------------------------------------------------------------------------- 2-1
SPECIFICATIONS
-------------------------------------------------------------------------------------------------------------------- 3-1
DESCRIPTION OF THE FEATURE
--------------------------------------------------------------------------------------------- 4-1
STRUCTURES
----------------------------------------------------------------------------------------------------------------------- 4-1
CONTROL PANEL
------------------------------------------------------------------------------------------------------------------ 4-2
ACCESSORIES
--------------------------------------------------------------------------------------------------------------------- 4-3
SIDE RUNNERS
------------------------------------------------------------------------------------------------------------------- 4-4
PRINCIPLE OF MAIN SYSTEM
---------------------------------------------------------------------------------------------------- 5-1
COOLING FAN SYSTEM
-------------------------------------------------------------------------------------------------------- 5-1
OVEN LAMP SYSTEM
------------------------------------------------------------------------------------------------------------ 5-3
FUNCTION SWITCH
--------------------------------------------------------------------------------------------------------------- 5-4
POWER TRANSFORMER
------------------------------------------------------------------------------------------------------- 5-5
ELECTRICAL CONNECTIONS
------------------------------------------------------------------------------------------------ 5-6
CONVECTION SYSTEM
---------------------------------------------------------------------------------------------------------
5-7
DOOR SYSTEM
-------------------------------------------------------------------------------------------------------------------- 5-8
CONTROL SYSTEM
------------------------------------------------------------------------------------------------------------ 5-13
GENERAL TROUBLE SHOOTING
----------------------------------------------------------------------------------------------- 6-1
ELECTRIC CIRCUIT DRAWING
-------------------------------------------------------------------------------------------------- 7-1
EXPLODED VIEW
--------------------------------------------------------------------------------------------------------------------- 8-1
INSTRUCTION PARTS
----------------------------------------------------------------------------------------------------------- 8-1
DOOR PARTS
----------------------------------------------------------------------------------------------------------------------- 8-2
CONTROLLER PARTS
----------------------------------------------------------------------------------------------------------- 8-3
CAVITY PARTS
--------------------------------------------------------------------------------------------------------------------- 8-4
INTERIOR PARTS
----------------------------------------------------------------------------------------------------------------- 8-5
INSULATOR PARTS -------------------------------------------------------------------------------------------------------------- 8-6
REPLACEMENT PARTS LIST
------------------------------------------------------------------------------------------------------ 9-1
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Only for training and service purposes

3-1
SPECIFICATIONS
ITEM DESCRIPTION
MODEL
Power Requirement
Max power
Heater Specifications
Oven lamp
Cooling Fan motor
Convection motor
Oven thermostat
Timer
Outside dimensions
Cavity full dimensions
Cavity usable space
Net weight
Shipping weight
EM430S
220-240 V~ 50 Hz
Grill inner + Grill outer + Convection fan : 3,000 W 13A (±5%)
Grill inner (Tubular) : 1,600 W / 7.0 A (±5 %), 32.2 Ω
Grill outer (Tubular) : 1,300 W / 5.7 A (±5 %), 39.4 Ω
Bottom heater (Tubular) : 1,500 W / 6.5 A (±5 %), 33.6 Ω
Convection heater (Tubular) : 2,100 W / 9.1 A (±5 %), 24.8 Ω
230-240 V, 25W, 1 Conventional lamp
* ECN Code may be issued for another specification oven lamp.
230~240 V AC, 50 Hz, Class E, 446 Ω
230 V AC, 50 Hz, 28 W, 240 mA, Class-H, 83.6 Ω
250 V / 16 A / T150
Open: 120 °±5 °C Close: Manual reset
Button pressure: Max. 10N (On the air duct upper)
1 min ~ 12 hours
593 (W) x 595 (H) x 573 (D) (Except handle height 50mm)
478 (W) x 348 (H) x 415 (D) (69L)
454 (W) x 330 (H) x 415 (D) (65L)
34 Kg (Exception : accessory : 5 Kg)
44 Kg (Included packing weight : 5 Kg)
* ECN (Engineering Change Number) code: ECN code may be issued in order to change parts or specification,
if necessary.
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Only for training and service purposes

3-2
SPECIFICATIONS
ITEM DESCRIPTION
MODEL
Main cooking mode
EM430S
Convection heat : Convection heater + Convection fan
Fan Grill : Grill inner + Grill outer + Convection fan
Conventional heat : Grill outer + Bottom heater
Defrost : Convection fan
Bottom heat : Bottom heater
Large grill : Grill inner + Grill outer
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4-1
DESCRIPTION OF THE FEATURE
Structures
Oven levels are numbered from the bottom up.
The 5 and 6 levels are mainly used for grill functions.
The cooking tables throughout this operating instructions give you suggested oven level, however you can change
these to suit yourself.
Note : Rating plate can be located at left-hand inner edge of the door or front-side of the oven.
LGE Internal Use OnlyCopyright © 2007 LG Electronics. Inc. All right reserved.
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Control panel
Top-heating
and grill heating
element Oven light
Air outlet
Door seal
Rear wall heating
element
Oven cavity
Full glass door
Side runners
Rating plate
Doorhandle
Level 6
Level 5
Level 4
Level 3
Level 2
Level 1

4-2
Control Panel
1. Timer button
2. Clock button
3. Operating mode knob
4. Time display
5. Less button
6. More button
7. Temperature knob
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4-3
Accessories
Wire grill
For dishes, baking tins, grilling and roasting tins.
Deep pan
For moist cakes, for roasting and for catching roasting juices or fat.
Tip :
When using the tray and wire grill with groove type oven for the first time, smear
the groove with cooking oil, using a cloth. Then wipe the groove with a dry cloth.
Now you can use them more smoothly.
Grill tray
For grilling meat, to be placed on top of the deep pan. Dripping fat is caught in
the deep pan.
Tips on using the trays and wire grills
Ensure that the trays and wire grills are properly fitted onto the
two side oven levels. Take particular care when removing
finished dishes and meals from the oven!
Use a suitable cloth pot holder or oven gloves.
If you are using the wire grill in combination with the deep pan
or some other tray to catch dripping liquids or fat, then do not
put the trays down on the bottom of the oven, slide them into
the lower levels.
If you place trays on the oven floor, the resulting build-up of
heat can damage the surface of the oven. For this reason,
there must always be a minimum gap of 2 cm between the accessories
and the oven floor.
Fitting the wire grill and deep pan
Slide the pan or wire grill in at the desired level.
The oven levels are numbered from the bottom up to the top.
LGE Internal Use OnlyCopyright © 2007 LG Electronics. Inc. All right reserved.
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Wire grill
Deep pan
gap 2cm

4-4
Side runners
Attaching the side runners
When using the oven for the first time, attach the side runners as following procedures.
You can find the side runners in the accessory box.
1. Put the inserting bar of the side runner into the hole
2. Align the front recess with the front screw hole. Insert and fasten a
screw ockwise.
3. Attach the other in the same way.
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Only for training and service purposes

5-1
PRINCIPLE OF MAIN SYSTEM
ITEM Checking
Cooling fan system When the oven is switched on, the fan is automatically activated to cool the oven
surfaces. When the oven is switched off, the fan is also switched off.
Switching the oven off
Set the Operating mode knob to "O" to switch the
oven off.
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5-2
PRINCIPLE OF MAIN SYSTEM
ITEM Trouble shooting (Questions & Answers)
Cooling fan system
Q: When the cooking is completed, the cooling fan runs for an excessively
long period.
A:
1. Cooking function still has been set.
The cooling fan is operating while a oven function is set.
Switch the oven off by setting the operating mode knob to “O” to stop cooling.
Q: Although the oven is switched on, the cooling fan is not operating.
A:
1. The connection has failed. Check the connections to the motor.
2. The fan may be obstructed. Remove the obstruction.
Q: The fan makes a noise during cooling the oven.
A: Remove the obstruction from the circumference of the fan for proper rotation.
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Only for training and service purposes

5-3
PRINCIPLE OF MAIN SYSTEM
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Only for training and service purposes
This oven lamp comes on when the door is opened.
If necessary, the oven lamp can be turned on for about 20 seconds by touching the
oven lamp button.
Input power supply (220V-240V) is connected directly to the oven lamp without
transformer.
Risk of electric shock!
The oven lamps sockets are live:
• Switch the oven off before replacing lamps.
To protect the lamps and glass covers, a soft cloth should be placed on the oven
floor.
Replacing the oven light / cleaning the
glass cover
1. Unscrew the lam cover by turning anti-
clockwise.
2. Replace the oven lamp.
(Type E14, 230V, 25W, heatproof
300°C)
Note : Always use a cloth to take hold of
a lamp to avoid it burning on fatty
deposits.
3. Refit the glass cover.
Note : Make sure that all parts are correctly in place.
ITEM
Oven lamp system
Lamp spec Type Heat resistant
230V / 25W E14 300°C

5-4
PRINCIPLE OF MAIN SYSTEM
Function Switch
This oven uses the function switch for cooking functions.
All electrical contacts of the switch should be equal to the contacts of the below
schematic diagram.
If there are some problems of oven operating, check the wiring of the function
switch.
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5-5
PRINCIPLE OF MAIN SYSTEM
ITEM Specifications & Checking
Power transformer
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This oven uses the variable thermostat for temperature sensing.
(Type 55.170, EGO)
Cut out temperature
Test condition
1. Put the capillary tube only into the liquid test bath.
(adjustable temperature equipment)
2. Ambient temperature around other parts should maintain 23°C.
temperature probe
capillary tube
Angle
40°C
180°C
270°C
cut out temperature
57°C ± 11K
210°C ± 8 K
310°C ± 11K

5-6
PRINCIPLE OF MAIN SYSTEM
ITEM Structures
Electrical
connections
1N~ L N E
1
220~240V
23
There are two type of earth in this oven connections.
Earth connections are consist of earth terminal tap and earth terminal ring.
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L1 L2 L3 N E
12345
2N~
220~240V
220~240V
3N~ L1 L2 L3 N E
12345
220~240V
220~240V
220~240V

5-7
PRINCIPLE OF MAIN SYSTEM
ITEM Structures
Convection system CONVECTION
The fixing nut is locked
counterclockwise.
The fat filter is applied only to non
pyrolytic model basically.
The rotation direction of convection
fan is clockwise.
Anti-C-fan Chamber
Convection heater
Chamber fixing screw
1780rpm at 230V, built
Convection fan
Fixing nut
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5-8
PRINCIPLE OF MAIN SYSTEM
ITEM Disassembling procedures
Door system
Removing the oven door
Step. 1
To remove the oven door for
easier cleaning, open the door
fully.
Step. 2
To release the locking clamps
on the hinges turn inner area of
clamps upwards and outer area
of them downwards as
illustrated.
Step. 3
Then lift the door upwards as
far as it will go.
Note : Do not attempt to take the
door off the hinge guides
when it is in a horizontal
position. The guides will
close, and damage the
appliance.
Step. 4
Hold the door securely at both
sides and lift upwards off the
hinge guides.
Locking clamp
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5-9
PRINCIPLE OF MAIN SYSTEM
ITEM Disassembling procedures
Door system
Rehanging the oven door
Step. 1
Hold the door securely at both
sides and carefully fit it back
onto the hinge guides.
Note : Make sure that th
door goes back on
straight.
Step. 2
Turn inner area of clamps
downwards and outer area of
them upwards as far as they
will go into a horizontal
position. Make sure that the
notches on the locking clamps
hook into the slots on the door
as illustrated.
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Only for training and service purposes