GE JP989 Series Technical Service Manual

C

GE Consumer Service Training

TECHNICAL SERVICE GUIDE

Radiant Downdraft Cooktop

MODEL SERIES:
JP989

PUB # 31-9055 06/00

!

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

T o a void personal injury , disconnect power bef ore 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 positions and properly fastened.

GE Consumer Service Training

Technical Service Guide

Copyright © 2000

All rights reserved. This service guide may not be reproduced in whole or in par t
in any form without written permission from the General Electric Company.

Table of Contents

Cooktop Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Cooktop Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Care and Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Installation Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Unpacking Cooktop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Cabinet Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Ductwork Calculations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Ductwork Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Cooktop Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Electrical Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Removal and Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Control Assembly Servicing . . . . . . . . . . . . . . . . . . . . . . . . . 20

Blower Assembly Replacement. . . . . . . . . . . . . . . . . . . . . . . 20

Capacitor Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

HOT Light Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Glass Cooktop Removal from Countertop . . . . . . . . . . . . . . . . . 22

Heater Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Broken Glass Replacement. . . . . . . . . . . . . . . . . . . . . . . . . 25

Reinstalling Glass Cooktop . . . . . . . . . . . . . . . . . . . . . . . . . 27

Rocking or Uneven Glass in Countertop .. . . . . . . . . . . . . . . . . 28

Illustrated Parts Breakdown . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Troubleshooting Information . . . . . . . . . . . . . . . . . . . . . . . . . 32

Schematics and Strip Circuits . . . . . . . . . . . . . . . . . . . . . . . . . 34

Warranty Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

– 1 –

Cooktop Features

Throughout this manual, features and appearance may vary from the customer’s model.

OFF

HI

O

L

1

9

2

8

3

7

4

6

5

ON

OFF

HI

O

L

1

9

2

8

3

7

4

6

5

HOT HOT

OFF

B

E

R

G

I

D

Feature Index (Features and appearance may vary)

1 Left Rear Surface Unit
2 Bridge Surface Unit
3 Left Front Surf ace Unit
4 V ent Grille
5 V ent Filter
6 Right Rear Surface Unit
7 Dual Surface Unit
8 Model and Serial Number Label

on the right side of the vent chamber)

9 Left Rear Surface Unit Control
10 Left Front/Bridge Surface Unit Control
11 Left Side HOT Surface Indicator Lights

surface unit)

12 Bridge Select
13 V ent F an Speed Control
14 Coil Size Select
15 Right Side HOT Surface Indicator Lights

surface unit)

16 Dual Surface Unit Control
17 Right Rear Surface Unit Control
18 Surface Unit ON Indicator Light

(below the vent grille)

(under the cooktop,

(one for each

(one for each

OFF

HI

O

L

1

9

2

8

3

7

4

6

5

OFF

HI

O

L

1

9

2

8

3

7

4

6

5

HI

M
E

D

C

E

O

Z

I

I

L

S

LO

GEA00181

OFF

HI

LO

1

2

3

4

LO

1

2

3

4

HOT HOT

B

R

G

I

D

OFF

E

9

8

7

6

5

ON

HI

9

8

7

6

5

OFF

OFF

HI

LO

1

2

3

4

LO

1

2

3

4

5

OFF

9

8

7

6

HI

9

8

7

6

5

HI

M
ED

C

E

O

Z

I

I

L

LO

S

GEA00182

– 2 –

Cooktop Controls

OFF

HI

9

8

7

6

5

ON

HOT

LO

1

2

3

4

Be sure you turn the control knob to
OFF when you finish cooking.

GEA00183

OFF

HI

9

8

7

6

5

Large 9"

LO

1

2

3

4

surface unit
setting

Small 6"
surface unit
setting

C

E

O

Z

I

I

L

S

Radiant Surface Units

The control for the radiant surface unit can be set any­where between LO and HI for an unlimited number of
heat settings. With the infinite switch, the coil cycles on
and off to maintain the selected control setting.

The surface unit’s ON indicator light will glow when any
surface unit is on.

Note: The surface unit’s ON indicator light ma y glow
between the surface control settings of LO and OFF, but
there is no power to the surface units.

The HOT surface indicator lights will glow when any
radiant element is turned on, and will remain on until the
surface is cooled to approximately 150°F.

Dual Surface Unit

To use the large (9-in.) surface unit, turn the COIL SIZE
knob clockwise to the 12 o’clock position. Push the
control knob in and turn it to the desired setting. The unit
will heat the entire area inside the larger circle.

To use the small (6-in.) surface unit, turn the COIL SIZE
knob counterclockwise to the 10 o’clock position. Push
the control knob in and turn it to the desired setting. The
unit will only heat the area inside the smaller circle.

GEA00184

OFF

LO

1

2

3

B

R

I

HI

9

8

4

E

G

D

7

6

5

Front Burner
only

Front
Burner and
Bridge

GEA00185

Bridge Surface Unit

Make sure the pan rests flat on the glass cooktop.
When the burner select knob points to the 12 o’clock

position, the control knob controls the left front surface
unit only.

When the burner select knob points to the 1 o’clock
position, the control knob controls both the left front
surface unit and the bridge area. Choose pans that
match the circle/bridge area as closely as possible.

The customer can create an oblong heated area by
using the left rear unit in addition to the front unit bridge
combination.

– 3 –

Temperature Limiter

Every radiant surface unit has a temperature limiter. The
temperature limiter protects the glass cooktop from
getting too hot.

The temperature limiter may cycle the units off for a time
if:

• The cooktop is on while cooking.

• The pan boils dry.

• The pan bottom is not flat.

• The pan is off center.

• There is no pan on the unit.

OFF

HI

MED

LO

GEA00186

How to Operate the Vent System

To operate the downdraft vent system, turn the vent fan
speed control knob to HI, MED, or LO, as needed.

– 4 –

Care and Cleaning

SURFACE
COOKING

Never cook directly on the glass.
Always use cookware.

OFF CENTER

Always place the pan in the center of
the surface unit you are cooking on.

DRAGGING

Do not slide cookware across the
cooktop because it can scratch the
glass. The glass is scratch resistant,
not scratch proof.

GEA00227

Radiant Surface Units

The radiant cooktop features heating units beneath a
smooth glass surface.

Do not store heavy items above the cooktop. If they drop
onto the cooktop, they can cause damage.

Do not use the surface as a cutting board.
A slight odor is normal when a new cooktop is used for

the first time. The odor is caused by the heating of new
parts and insulating materials, and will disappear in a
short time.

On models with a white glass cooktop, it is normal for
the surface to appear discolored when it is hot. This is
temporary and will disappear as the glass cools.

The surface unit will cycle on and off to maintain the
selected control setting.

It is safe to place hot cookware from the oven or surface
on the glass surface when the surface is cool.

Water stains (mineral deposits) are removable using the
cleaning cream or full-strength white vinegar.

Window cleaner may leave an iridescent film on the
cooktop. The cleaning cream will remove this discolora­tion.

Daily Cleaning

WARNING: Be sure electrical power is off and all sur-

faces are cool before cleaning any part of the cooktop.
Use only a recommended cleaning cream, such as the

Cerama Brite brand or the Cooktop Cleaning Cream
brand, on the glass cooktop.

To maintain and protect the surface of the glass cooktop,
follow these steps:

• Before using the cooktop for the first time, clean it
with cleaning cream. This helps protect the top and
makes cleanup easier.

• Clean the surface with cleaning cream after each
use.

• Rub a few drops (less is better) of the cleaning
cream onto soiled areas using a damp paper towel.
Buff with a dry paper towel until all soil and cream
are removed.

– 5 –

Using a razor scraper will not
damage the surface if the 45 angle
is maintained.

GEA00192

Note: On models with a white glass cooktop, any g rease
spatter or greasy residue from a dish towel will burn on
the cooktop when the surface units are heated, leaving a
brown stain. This can be removed with the cooktop
cleaning cream and the razor scraper. To avoid this
brown discoloration, remove any spatter with paper
towels and cooktop cleaning cream before heating any
surface unit.

Heavy, Burned-On Soil

1. Allow the cooktop to cool.

2. Apply a few drops (less is better) of cleaning cream
to the cool, soiled area. Spread the cream across the
entire soiled area.

3. Hold scraper at a 45° angle against the glass ce­ramic surface. This 45° angle makes the scraping
easier.

Caution: Be sure to use a new sharp razor scraper. Do
not use a dull or nicked blade.

4. Scrape soil with the enclosed razor scraper. Keep a
small amount of cream on the soil as you scrape.
Heavily soiled areas may require repeated applica­tions of cream. It will be necessary to press down on
the razor scraper while scraping the soiled area with
cooktop cream.

5. If any soil remains, repeat the steps listed above.

To order more cream and/or scrapers for cleaning the
glass cooktop, please call our toll-free number:

National Parts Center.............................. 800-626-2002

Cleaner ....................................................... #WX10X300

Scraper.......................................................#WX5X1614

Cream Scraper Kit................................... #WB64X5027

Special Care for Sugary Spills

Caution: Be sure to use a new sharp razor scraper. Do

not use a dull or nicked blade.
Sugary spills (such as jellies, fudge, candy syrups) or

melted plastics can cause pitting of the surface of your
cooktop unless the spill is removed while still hot. This
pitting damage is not covered by the warranty. Special
care should be taken when removing these hot sub­stances.

1. Turn off all surface units affected by the spill. Re­move hot pans.

2. Wearing an oven mitt, hold the razor scraper at a 45°
angle to the cooktop. Scrape the hot spill to a cool
area outside the surface unit.

3. With the spill in a cool area, use a dry paper towel to
remove any excess. Any remaining spillage should

– 6 –

be left until the surface of the cooktop has cooled.
Do not continue to use the soiled surface unit until all
of the spillage has been removed. Follow the steps
under Heavy, Burned-On Soil to continue the
cleaning process.

Caution: If pots with a thin overlay of aluminum, copper,
or enamel are allowed to boil dry, the overlay may bond
with the glass cooktop and leave a b lac k discolor ation.
This should be removed immediately before heating
again or the discoloration may be permanent.

Vent Filter

Vent

Chamber

GEA00190

Remove and replace the filter diagonally through the
vent opening.

When replacing the filter, make
sure it rests, at an angle, on the
supports in the vent opening.
Latch it in place.

Vent System

WARNING: Before cleaning the vent grille, be sure the

exhaust blower is turned off.

To clean the vent grille,

remove it from the cooktop by
lifting it up and off. Wipe the vent grill with a damp cloth.
If necessary , the vent grille can be washed in the sink.
Use dishwashing liquid for cleaning. Do not use abrasive
cleaners, they will damage the vent grille’s finish.

Do not clean the vent grille in the dishwasher.

To clean the vent chamber,

use hot, soapy water. Do
not use abrasive cleaners, they will damage the vent
chamber’s finish.

Vent Filter

Caution: Do not operate the vent without the filter in

place.
The filter is held in place with a metal latch. Move the

latch up in either direction and lift the filter diagonally up
and out of the vent opening.

GEA00189

Molded flat area

Flat

GEA00191

Clean the filter by swishing it in hot, soapy water. Rinse
well and dry thoroughly.

To order filters, please call our toll-free number :

National Parts Center..............................800-626-2002

Filter ...................................................... # WB02X10651

Control Knobs

The control knobs may be removed for easier cleaning.
Before removing the knobs for cleaning, be sure they are

in the OFF position. When replacing the knobs, check
the OFF position to insure proper placement.

Wash knobs in soap and water, but do not soak them.
Avoid getting water into the knob stem holes.

The knob stem is flat on one side (see illustration).
Check the inside of the knob and find the molded flat
area.

Replace the knob by fitting the molded flat area inside
the knob onto the flat area of the stem.

– 7 –

Installation Requirements

Before you begin, read these instructions
completely and carefully.

Note: Save these instructions for local inspector’s

use.

• Observe all governing codes and ordinances.

• Installation of this unit requires 2 people. Do not
attempt to install without assistance.

• This appliance must be properly grounded.

Tools and Materials You Will Need:

•Saw

• Flat blade screwdriver

• Electrician’s pliers

• Duct tape

• Measuring tape or scale

• Carpenter’s square

• Wrench or socket set

• Drill and drill bit

• Sheet metal screws

• Junction box*

• 1/2 in. flexible conduit*

• Electrical cable per local code*

• Wire nuts*

• Duct work

*Note: Electrical installation kit JXCK89 may be
ordered separately and includes all the parts
necessary to connect the cooktop to typical rough­in wiring.

Electrical Requirements

WARNING: F or personal saf ety, remove house fuse

or circuit breaker before beginning installation.
This appliance must be supplied with the proper

voltage and frequency, as listed in these Installa­tion Requirements, and connected to an indi­vidual, properly grounded branch circuit, protected
by a 40-amp circuit breaker or time-dela y fuse.

All wire connections must be made in accordance
with local codes and properly insulated. Check
with your local utility for governing electrical codes
and ordinances. In the absence of local electrical
codes, the National Electrical Code, ANSI/NFPA
No. 70–Latest Edition, governing electric range
installations, must be follo wed.

A copy of the National Electrical Code can be
obtained by writing to:

National Fire Protection Association
Batterymarch Park
Quincy, MA 02260

Effective January 1, 1996, the National Electrical
Code requires that new, but not existing, construc­tion utilizes a four-conductor connection to an
electric range. When installing an electric range in
new construction, follow the instructions in New

Construction and Four-Conductor Branch
Circuit Connection.

You must use a three-wire, single-phase AC
208Y/120-Volt or 240/120-Volt, 60-Hertz electrical
system with separate ground. If you connect to
aluminum wiring, properly installed connectors
approved for use with aluminum wiring must be
used.

30" Cooktop (Dimensions for reference only)

Nomenclature
(on other side)

Mini-manual
located behind
cover

– 8 –

7

21 "

1

20 "

Unit must be vented to the outside!

8

19"

6"

Dia.

2

29 "

28 "

7

8

6"

7

8

GEA00193

Sufficient air is needed for proper combustion and exhausting of gases through the flue (chimney)
of fuel-burning equipment to prevent back drafting. Follow the heating equipment manufacturer’s
guidelines and safety standards such as those published by the National Fire Protection Associa­tion (NFPA), the American Society for Heating, Refrigeration and Air Conditioning Engineers
(ASHRAE), and the local code authorities.

Note: The exhaust blower output is approximately 400 CFM (cubic feet per minute) without ductwork.
Each installation is different and ductwork affects blower output accordingly. Actual blower exhaust CFM
can be approximated using the graph below.

Step 1: Calculate the “equivalent duct length” using Table 1 on page 13 of these instructions for
your installation.

Step 2: Find the approximate intersection point of the blower exhaust perfor mance curve with the
equivalent duct length to estimate the actual maximum blower output for your installation.

Examples: 50 equivalent ft of ductwork have approximately 320 CFM. 100 equivalent ft of ductwork
have approximately 265 CFM.

450

400

350

300

250

200

Air Flow (CFM)

150

100

JP989 Downdraft Cooktop Exhaust Blower CFM

50

0

0 25 50 75 100 125 150

6-in. Diameter Equivalent Duct Length

6 in. Diameter Equivalent Duct Length

– 9 –

GEA00303

Unpacking Cooktop

Parts Included:

• (2) Hold-down retainers and screws

• Blower discharge duct transition to 6-in. round
pipe

• (3) Sheet metal screws

• Foam gasket tape (9-ft. roll)

• Vent grille

• Cleaning cream

• Cleaning Scraper

Sheet Metal
Screws

Cleaning Cream

Note: Leave the
cooktop resting
on the cardboard
sleeve until ready
to install in the
cabinet.

Hold-down Retainers
and Screws

Cleaning Scraper

Vent Grille

Foam Gasket Tape

CAUTION:

DO NOT LIFT FROM

VENT OPENING

CAUTION: GLASS IS FRAGILE

DO NOT BUMP EDGE OF GLASS

DURING INSTALLATION

– 10 –

Blower Discharge
Transition Duct

(Packed in Cardboard
Sleeve)

GEA00304