standard free-standing 30” electric range · standard free-standing 30” electric range 2005. g...

g GE Consumer & Industrial Technical Training

Standard Free-standing 30” Electric Range

2005

g Electric Range

(GE Confidential & Proprietary Information - Not for Public Disclosure)

g Installation Issues

• Anti-Tip Device IMPORTANT – has to be installed with any new range – make sure if any floor work done that Anti-Tip Device is reinstalled

• Upper cabinets need to be at a minimum 30”above cooktop

• Separate 40 Amp circuit required (electric), separate 20 Amp circuit required (gas)


g Major Component Locations

Plug-in Surface Element(1 of 4)

Surface Element Receptacle

Thermo-Bulb

Infinite Switch (Element Control - 1 of 4)

Oven SelectorOven ThermostatOven Heating Indicator

Surface Heating Indicator

Broil Element

Electrical Terminal Block(Back of Range)

Bake Element


g Oven Door

• Stain around door - check gasket for torn areas• Check for correct door tension• Broil position different in electric oven than gas


g Baking Problems• Pre-heating is normally 15 minutes to reach 350o

• Only need to pre-heat for short baking times (cookies, rolls, biscuits, etc.)


g Bake Operation

L1

OVEN INDICATOR

OVEN SET SWITCH OFF

L1

BK

PL

BR

N

BAKE ELEMENT

BROIL ELEMENT

N

L2OVEN

THERMOSTATOFF

1

23

When the range is plugged in, line voltage from the L1side of the line is available to the Oven Set Switch, which creates a potential circuit for the Oven “On” indicator. The oven thermostat also closes a contact to provide a completed circuit to the L2 side of the line.


g Bake Operation

L1

OVEN INDICATOR

OVEN SET SWITCH BAKE

L1

BK

PL

BR

N

BAKE ELEMENT

BROIL ELEMENT

N

L2OVEN

THERMOSTATON

1

23

When the Oven Set Switch is set to BAKE & the Oven Thermostat is turned to a selected temperature, current flows from L1, through Oven Set Switch contact PL to the Oven Indicator, then through Oven Thermostat contacts 2 to 1 to the L2 side of the line.


L1

OVEN INDICATORL1

BK

PL

BR

N

BAKE ELEMENT

BROIL ELEMENT

N

L2

1

23

g Bake Operation


OVEN THERMOSTAT

ON

At the same time current flows from the L1 side of the line through Oven Set Switch contacts L1 to BK, through the Bake Element, to the Oven Thermostat contacts 2 to 1 to the L2 side of the line.


g Bake Operation

L1

OVEN INDICATORL1

BK

PL

BR

N

BAKE ELEMENT

BROIL ELEMENT

N

L2

1

23


OVEN THERMOSTAT

ON

During the BAKE function, the Broil Element is also activated. Current flows through Oven Thermostat contacts 1 to 3, through the Broil Element to Oven Set Switch contact BR to N to the neutral side of the line. The Broil Element operates at half power (120VAC) during this time.


g Testing Bake Element• Set the ohmmeter to the Rx1 scale


• Remove the oven racks & the bake element

• Touch the meter leads to the terminal connectors of the bake element

• The meter should indicate 24Ω

g Removing Bake Element

• Unplug the range• Remove the lower oven

racks• Remove the Phillips screws

from the bake element bracket, pull the element forward, & disconnect the wire connectors from the terminals

BAKE ELEMENT

WIRECONNECTORS

PHILLIPS SCREW (2)MOUNTINGBRACKET


• Remove the rear panel from the range by removing the mounting screws.

g Removing Rear PanelREAR PANEL

IMPORTANT NOTE: When moving the range backinto place, make sure that the rear foot engages in theanti-tip bracket. Check to make sure that it is engagedproperly by pulling forward on the top of the range.The anti-tip bracket must be installed.


Check wire connections to Bake Element (use high temp connectors to repair) – use Ohmmeter to check resistance value of element – Use

Voltmeter to check for 240VAC


g Broil Operation

L1

OVEN INDICATORL1

BK

PL

BR

N

BAKE ELEMENT

BROIL ELEMENT

N

L2OVEN

THERMOSTATON

1

23

OVEN SET SWITCH BROIL

When the Oven Set Switch & the Oven Thermostat are set to BROIL, current flows from L1, through Oven Set Switch contact PL to the Oven Indicator, & finally through Oven Thermostat contacts 2 & 1 & the L2 side of the line. The Bake Element does not operate during this time.


g Broil Operation

L1

OVEN INDICATORL1

BK

PL

BR

N

BAKE ELEMENT

BROIL ELEMENT

N

L2OVEN

THERMOSTATON

1

2

3

OVEN SET SWITCH BROIL

Current also flows from the L1 side of the line through Oven Set Switch contact BR, through the Broil Element, & finally through Oven Thermostat contacts 3 & 1 & the L2 side of the line. The Broil Element operates at full power during this time.


g Testing Broil Element• Set the ohmmeter to the Rx1 scale


• Remove the oven racks & the broil element• Touch the meter leads to the terminal connectors of the broil element• The meter should indicate 17Ω

g Removing Broil Element

• Unplug the range• Remove the oven racks• Remove the rear panel from the range• From behind the range, disconnect the

wire connectors from the broil element terminals

• From inside the oven, remove the Phillips screws from the brackets at the top of the broil element & from the mounting brackets, then pull the element forward so that the flag terminals clear the holes, & remove it

BROIL ELEMENT TERMINAL

BACK OF RANGE

WIRECONNECTOR

BRACKETBROIL

ELEMENT

TOP BRACKET

PHILLIPSSCREW

TOP BRACKET

PHILLIPSMACHINE

SCREW (2)


g Cooking Problems• Check sensor (1100Ω at room temp) & sensor connections – use

Ohmmeter across sensor connections – also check sensor connector plug for discoloration due to high heat – replace if necessary

• Dark baking pans retain more heat than shiny ones - reduce temp 25o

• Incorrect rack positions - see Use & Care Manual• Opening oven door many times – temperature lowered by 30o each time

door is opened• Covering oven vent (under right rear element) will effect bake – do not

leave tea pot or any pan on right rear element when oven is on, also no burner covers – oven will short cycle & effect length of bake cycle


Pilot Light for Surface UnitsOven Cycle Light

Oven Thermostat


g Testing Oven Thermostat• Set the ohmmeter to the Rx1K scale• Turn the oven thermostat to OFF• Touch the meter leads to the following terminals. The meter

should indicate as follows:

Switch Position Terminals ResistanceOff 1 - 2 Infinite (open)Off 1 - 3 Infinite (open)Off 2 - 3 Infinite (open)

3 2

4 1

Oven ThermostatTerminals

Oven Thermostat Off

14

2 3


• Turn the oven thermostat to 375o

• Remove the jumper wire from thermostat terminal 1

• Touch the meter leads to the following terminals. The meter should indicate as follows:

g Testing Oven Thermostat

1Jumper wire

3 2

4 11

4

32

Oven Thermostat On

Switch Position Terminals ResistanceOn 1 - 2 0Ω (closed)On 3 - 4 0Ω (closed)



Switch Position Terminals ResistanceOn 1 - 2 0Ω (closed)On 3 - 4 0Ω (closed)

g Testing Oven Thermostat

3 2

4 1

Oven ThermostatTerminals

1

4

32

Oven Thermostat On


g Calibration Procedures• Tools needed

– Digital Temperature tester-GE Part # WX5X603• Empty all items from oven except racks

– Have one rack at mid height inside oven• Place thermocouple on center oven rack in middle &

close oven door• Heat oven to 375o & allow to cycle at least 3 times• Allow oven to cycle

– Record temperature when oven cycles on– Record highest temperature after heat cycles off -

add the temperatures & divide by 3– Mean temperature should be within 5o of oven set

point– Make adjustments from back of bake knob or ERC


g Test Equipment WX5X603Volts-Ohms-Temp-Hz

• AC/DC Voltage• Resistance• Diodes• Capacitance• Temperature• Hi Temp Lead• Frequency in Hertz• Amps-Bypass Circuits• Auto Ranging• Auto Shut Off•Data Hold Feature• 90o Leads with sharp tips


• Unplug the range

g Removing Oven Thermostat

RED

BLACKBLUE

RED

3 2

4 1

Oven Thermostat& Wire Colors

• Remove the rear panel from the range

• Remove all of the wires from the oven thermostat terminals


• Unplug the range• Remove the rear panel from the range• Remove all of the wires from the oven

thermostat terminals


RED

BLACKBLUE

RED

3 2

4 1


OVENTHERMOSTAT

CONTROLPANEL

PHILLIPS SCREW (2)

CONTROLKNOB

• Remove the control knob & the two Phillips screws from the thermostat


• Unplug the range• Remove the rear panel from the range• Remove all of the wires from the oven

thermostat terminals• Remove the control knob & the two

Phillips screws from the thermostat


RED

BLACKBLUE

RED

3 2

4 1


OVENTHERMOSTAT

CONTROLPANEL

PHILLIPS SCREW (2)

CONTROLKNOBCAPILLARY TUBE

CLIPHOLEIN LINER

THERMO-BULB

• Unclip the thermo-bulb from oven liner• From rear of unit, pull the thermo-bulb & capillary tube through oven liner, & unclip it from rear panel



Terminals ResistanceL1 - PL Infinite (open)L1 - BK Infinite (open)L1 - BR Infinite (open)

g Testing Oven Set Switch

PL BK

L1BR

Oven Set SwitchTerminals

L1 N

Off PositionPL BK BR

N


• Turn the oven set switch to the following positions & touch the meter leads to the terminal connectors as shown below. The meter should indicate as follows:

Switch Position Terminals ResistanceBake L1 - PL 0Ω (closed)Bake L1 - BK 0Ω (closed)Bake N - BR 0Ω (closed)Broil L1 - PL 0Ω (closed)Broil L1 - PL 0Ω (closed)

g Testing Oven Set Switch

PL BK

L1BR

N

Oven Set Switch Terminals

L1 N

L1 N

PL BK BR

Bake Position

Broil Position

PL BK BR


• Unplug the range & remove the rear panel• Remove all of the wires from the oven selector terminals• Remove the control knob & the two Phillips screws from

the oven set switch

g Removing Oven Set Switch

OVEN SET SWITCH

CONTROL PANEL

PHILLIPS SCREW (2)

CONTROL KNOB

BLACK (INDICATOR)REDWHITE

BLACKBLUE

PN BK

L1BR

L


g Electric Surface Unit Problems

• Plug-in CalrodTM elements must be fully seated in receptacle

• If elements are not responding correctly to switch setting, check to see if seated properly – if damaged replace element & receptacle together

• Replace surface unit switches like for like -current sensitive & voltage sensitive – test by putting Voltmeter (AC scale) into receptacle & read voltage – on HIGH should read 240VAC 100% of time, on MED or “5” should read 240VAC 50% of time (switch cycles on & off)


• Set the ohmmeter to the Rx1 scale• With the element removed, touch the meter leads of

the ohmmeter to the ends of the prongs• The meter should indicate the following resistance

for the indicated element:8” element = 27Ω6” element = 45Ω

g Testing Plug-In Element

INFINITE SWITCH

ELEMENT


g Testing Plug-In Receptacle

• Visually inspect the receptacle for the following defects:– Cracked block– Melted block– Internal arcing (carbon buildup around

terminals)– Burnt or charred wires– Loose connectors


g Removing Plug-In Receptacle• Unplug the range• Remove the surface element from the receptacle• Remove the screw from the receptacle you wish to

service, unhook it from the cooktop, & remove it• Cut the two wires approximately 2”-3” from the edge of

the receptacle• Use the Receptacle Kit (WB17X5091) & follow the

instructions contained in the kitCOOKTOP

RECEPTACLESCREW

RECEPTACLE

CUT WIRES HERE

2” - 3”


g Surface Unit Replacements

WB17X5091WB30M2

Both parts MUST be replaced if receptacle or burner connections are damaged


Set switch on HIGH - Check for 240VAC output

Check for 240VAC input


g Electric Range Switches


The difference betweenPKTMP003.exe these 2 switches is the position of the small heater in the circuit

The heater is in parallel with the element The heater is in series with the element

Range Surface Unit Schematic


To check switch: set voltmeter on VAC, place meter leads inside receptacle, turn switch to HIGH –should read constant 240VAC. Turn switch to “5” – should read 240VAC for half the time.

Make sure that you have 240VAC at L1 & L2

• Set the ohmmeter to the Rx1 scale• With no power applied, disconnect the wires from the

infinite switch terminals. Turn the infinite switch to the “HI” setting, & you should obtain continuity readings between the following terminals:

L1 & PL1 & H1L2 & H2

g Testing Infinite Switch

H1

P

L1H2

L2

H1

P

L1

H2

L2


H2 L2 L1

H1

P

INFINITE SWITCH

CONTROL PANEL

PHILLIPS SCREW (2)

CONTROL KNOB

• Unplug the range & remove the rear panel• Remove all of the wires from the infinite switch terminals• Remove the control knob & the two Phillips screws from

the switch

g Removing Infinite Switch


standard free-standing 30” electric range · standard free-standing 30” electric range 2005. g...

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