Thermador CEM456 Care and use User manual

Service Manual
for
CEM/CET/CEP COOKTOPS
®
19
8
7
6
5
4
3
2
KEEP
WARM
PAN
SIZE
ZONE
SMART™
PANEL
LOCK
POWER
19
8
7
6
5
4
3
2
KEEP
WARM
PAN
SIZE
ZONE
SMART™
PANEL
LOCK
POWER
LO
MED MED
HI
LO
OFF
HI
OFF
HI
HI
LO
LO
OFF
HI
HI
LO
LO
OFF
HI
HI
LO
LO
OFF
HOT SURFACE
ON
HI
LO
MED
OFF
HI
OFF
HI
HI
LO
LO
OFF
LO
LO MED
HI
LO OFF
HI
HI
LO
LO
OFF HI
HI
LO
LO
OFF
HI
HOT SURFACE
ON
CEM456
CEM365 CEP365 • CET365
CEP456
PAN
SIZE
ZONE
SMART™
PANEL
LOCK
POWER
19
8
7
6
5
4
3
2
KEEP
WARM
MED MED
HI
HI
LO
LO
OFF
HI
LO OFF
HI
LO OFF
HI
HI
LO
LO
OFF
HOT SURFACE
ON
CEM304 CEP304 • CET304
© 2002 BSH Home Appliances Corp.

Table of Contents
Cooktop Models.............................................. 1 - 2
CEM Cooktops .......................................................3
CET Cooktops:.......................................................4
CEP Cooktops: .......................................................5
Ceramic CooktopTechnical Overview .............6
Technical Overview................................................6
Component Description.......................................7
Radiant Elements ....................................................7
Component Description.......................................7
Radiant Elements ....................................................8
Component Description.......................................8
Infinite Switches ......................................................9
Component Description.......................................9
Relay board ........................................................... 10
Component Description.................................... 10
Temperature limiters .......................................... 11
Component Description.................................... 11
Indicator lights...................................................... 12
Indicator LIGHTS ................................................ 12
Component Description.................................... 12
Sensors:.................................................................. 13
Component Description.................................... 13
Pot Sensing Circuit Board.................................. 14
Component Description.................................... 14
ElectronicTouch Control Board ...................... 15
Component Description.................................... 15
Relay board ........................................................... 16
Component Description.................................... 16
Input board............................................................ 17
Component Description.................................... 17
Installation ............................................................. 18
CEM Cooktops Installation.......................18 - 21
CET/CEP Cooktops Installation...............22 - 25
Cooktop Disassembly ................................26 - 32
Cooktop Reassembly..................................33 - 34
Technical Data -Table of Errors ....................... 34
CET/CEP Residual Heat onTime..................... 35
Pot Sensing Calibration ..............................36 - 39
Wiring andVisuals .......................................40 - 69
Electrical Schematic Drawings..................70 - 74
CET/CEP 365........................................................ 70
CET/CEP 304........................................................ 71
CEM 456................................................................ 72
CEM 304................................................................ 73
CEM 365................................................................ 74

CEM/CET/CEP Service Manual
PAGE 1
Cooktop Models
NO.TYPE SIZE WATTAGE
1 Single 6" (140 mm) 1200W
2. Double 5"/8" (120/210 mm) 750 / 2200W
3 Double 7"/8"(140/230 mm) 1100 / 2500W
4 Single 7" (180 mm) 1800W
5 Bridge 7"x16" (180 x 415 mm) 4000W
6 Double 5"/8" (120/195 mm) 800 / 1900W
MED MED
HI
HI
LO
LO
OFF
HI
LO OFF
HI
LO OFF
HI
HI
LO
LO
OFF
HOT SURFACE
ON
LO
MED MED
HI
LO
OFF
HI
OFF
HI
HI
LO
LO
OFF
HI
HI
LO
LO
OFF
HI
HI
LO
LO
OFF
HOT SURFACE
ON
HI
LO
MED
OFF
HI
OFF
HI
HI
LO
LO
OFF
LO
LO MED
HI
LO OFF
HI
HI
LO
LO
OFF HI
HI
LO
LO
OFF
HI
HOT SURFACE
ON
CEM456
CEM304 CEM365
2
1
2
11
235
4
4
1
6
35
4
4
3
Cooktop Models

CEM/CET/CEP Service Manual
PAGE 2
Cooktop Models
PAN
SIZE
ZONE
SMART™
PANEL
LOCK
POWER
19
8
7
6
5
4
3
2
KEEP
WARM
19
8
7
6
5
4
3
2
KEEP
WARM
PAN
SIZE
ZONE
SMART™
PANEL
LOCK
POWER
19
8
7
6
5
4
3
2
KEEP
WARM
PAN
SIZE
ZONE
SMART™
PANEL
LOCK
POWER
CEP456
CET304
CEP304 CET365
CEP365
2
1
3
11
245
5
6
1
7
45
5
6
8
NO.TYPE SIZE WATTAGE
1 Single 6" (140 mm) 1200W
2. Double 5"/8" (120/210 mm) 750 / 2200W
3 Triple 5"/7"/8"(120/175/210 mm) 800 / 1600 / 2300W
4 Triple 5"/7"/9" (120/180/230 mm) 800 / 1600 / 2500W
5 Single 7" (180 mm) 1800W
6 Bridge 7"x16" (180 x 415 mm) 4000W
7 Double 5"/8" (120/195 mm) 800 / 1900W
8 Double 6"/9" (140/230 mm) 1100 / 2500W
Models CET 304 and CET365 do not have the ZONE SMART™‘ Pad.
Cooktop Models

CEM/CET/CEP Service Manual
PAGE 3
MED MED
HI
HI
LO
LO
OFF
HI
LO OFF
HI
LO OFF
HI
HI
LO
LO
OFF
HOT SURFACE
ON
LO
MED MED
HI
LO
OFF
HI
OFF
HI
HI
LO
LO
OFF
HI
HI
LO
LO
OFF
HI
HI
LO
LO
OFF
HOT SURFACE
ON
HI
LO
MED
OFF
HI
OFF
HI
HI
LO
LO
OFF
LO
LO MED
HI
LO OFF
HI
HI
LO
LO
OFF HI
HI
LO
LO
OFF
HI
HOT SURFACE
ON
CEM456
CEM304 CEM365
2
1
2
11
235
4
4
1
6
35
4
4
3
CEM Cooktops
The CEM cooktops are mechanical models with a ceramic top and control knobs.The single radiant elements
arecontrolledby the1-cycle infiniteswitches.The dualelementsarecontrolledby the2-cycle infinite switches.
Thebridgeelement is controlledbya 2-cycleinfiniteswitch anda relay (togetherthey serveasa gang switch).
The ceramic is protected ftom overheating by limiters in the element.The ON indicator light serves as a pilot
light,and the hot surface light tells you when the surface is hot to touch.The cooktop is connected to 240
volts.All components are activated by 240 volts.There is no neutral line,only l1,l2,and ground.
Cooktop Models

CEM/CET/CEP Service Manual
PAGE 4
CET Cooktops:
The CET cooktop has a touch sensitive mono-control system.By touching the pads on the ceramic top,you
select the mode of operation and the desired power level.The electronic touch control board interprets the
selectionand activatesthe single,dual,tripleandbridgeelements.The ceramictop isprotectedfromoverheating
by limiters in the element.The on indicator light serves as a pilot light,and the hot surface light tells you when
the cooktop is hot to touch.The cooktop is connected to 240 volts.The components are both 120 and 240
volts.Installation requires l1,l2,neutral and ground.
PAN
SIZE
ZONE
SMART™
PANEL
LOCK
POWER
19
8
7
6
5
4
3
2
KEEP
WARM
19
8
7
6
5
4
3
2
KEEP
WARM
PAN
SIZE
ZONE
SMART™
PANEL
LOCK
POWER
CET304 CET365
2
1
3
11
245
5
6
Cooktop Models

CEM/CET/CEP Service Manual
PAGE 5
CEP Cooktops:
The CEP cooktop incorporates all the features of the cet cooktop plus zone smart.Zone smart senses the
presence of cookware and selects the most appropriate sized element.Additionally,it turns the element off
when the pan is removed.Zone smart can be turned on or off.
PAN
SIZE
ZONE
SMART™
PANEL
LOCK
POWER
19
8
7
6
5
4
3
2
KEEP
WARM
19
8
7
6
5
4
3
2
KEEP
WARM
PAN
SIZE
ZONE
SMART™
PANEL
LOCK
POWER
19
8
7
6
5
4
3
2
KEEP
WARM
PAN
SIZE
ZONE
SMART™
PANEL
LOCK
POWER
CEP456
CEP304 CEP365
2
1
3
11
245
5
6
1
7
45
5
6
8
Cooktop Models

CEM/CET/CEP Service Manual
PAGE 6
Ceramic CooktopTechnical Overview
The CEM/CET/CEP cooktops are comprised of the
following components:
Radiant Elements
Single Elements
Dual Elements
Triple Elements
Radiant Bridge Elements
Infinite Switches
1-Cycle
2-Cycle
Control Knobs
Relay Board
ElectronicTouch Control Relay Board
Pot Sensing Circuit Board
Heat Limiters
Sensors
Indicator lights
ON Indicator Light
Hot Surface Indicator Lights
Panel Lock Light
Power Light
Technical Overview

CEM/CET/CEP Service Manual
PAGE 7
Component Description
Radiant Elements
A single element, illustration above, uses a wire ribbon that is located under the glass ceramic surface to
provide the heat for cooking.The single element uses 1 wire ribbon. Radiant elements are designed to cycle
on and off.
The dual element, illustration above, uses 2 wire ribbons to provide heat for cooking.There are 2 ribbons
within the same heating area. Either the small inner element or both the inner and outer elements may be
selected for use.
Component Description

CEM/CET/CEP Service Manual
PAGE 8
The triple element,illustration above, uses 3 wire ribbons to provide heat for cooking.There are 3 ribbons
within the same heating area.You can select the inner,the inner and middle,or the inner, middle and outer
elements.
Thebridgeelement,illustration above,consists of3separate wireribbon elements .Whenthe bridgeelement
(all 3 elements) is used,it creates an oblong heating area.that can be operated in 2 different ways.First,use
one or both of the circular elements independently using a 2 cycle switch. Second, use both the circular
elements and the small bridge element using a 2 cycle switch and a relay.
Radiant Elements
Component Description