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General ........................................................................................ 3

1.1

Models................................................................................... 3

1.2

Features and Options............................................................ 3

1.3

Data Plate.............................................................................. 4

1.4

Warranty................................................................................ 4

Operation..................................................................................... 4

2.1

Element Duty Cycles ............................................................. 4

2.1.1

Using Table 3 (Element Duty Cycles During Preheat) ... 5

2.2

Sequence of Events .............................................................. 5

2.3

Cooling Fans ......................................................................... 7

Component Accessibility........................................................... 8

3.1

Serviceable from Front .......................................................... 8

3.2

Serviceable from Top ............................................................ 8

3.3

Serviceable from Rear........................................................... 8

Service and Repair ..................................................................... 8

4.1

Doors..................................................................................... 8

4.1.1

Removing and Replacing the Door(s) ............................ 8

4.2

Door Latch/Motor Assembly .................................................. 9

4.3

Lamps.................................................................................. 10

4.3.1

Replacing Lamps ......................................................... 10

4.4

High Temperature Cutout (HTC) ......................................... 11

4.5

Convection Fan and Ring Element...................................... 11

4.6

Temperature Sensor ........................................................... 12

4.6.1

Setting Temperature Offsets ........................................ 12

4.7

Broil Element ....................................................................... 13

4.8

User Interface...................................................................... 13

4.8.1

Removing the User Interface ....................................... 14

4.9

PC Control Module (Relay Board)....................................... 15

4.10

Power Supply Module...................................................... 18

4.11

Halogen Light Transformer(s).......................................... 18

4.12

Convection Fan Motor ..................................................... 18

4.13

Bake Element (Upper Oven)............................................ 18

4.13.1

Removing the Bake Element........................................ 18

4.13.2

Reinstalling the Bake Element ..................................... 19

4.14

Cooling Fan Motor (Upper Oven) .................................... 19

Error Codes .............................................................................. 19

5.1

Error Code Table ................................................................ 19

5.2

Service Mode / Setting Option Code .................................. 20

5.2.1

HBL3/HBN3 ................................................................. 20

5.2.2

HBL5/HBN5 ................................................................. 21

5.2.3

HBL8............................................................................ 21

5.3

Option Codes ...................................................................... 22

Demo Mode............................................................................... 22

Troubleshooting....................................................................... 22

7.1

Fault Tree Diagram ............................................................. 23

7.2

Fault Tree ........................................................................... 25

7.3

Testing ................................................................................ 33

Wiring Diagrams and Schematics .......................................... 33

8.1

Wire Color Key.................................................................... 33

8.2

Strip Diagrams .................................................................... 34

Additional References ............................................................. 34

9.1

QuickFinder ........................................................................ 34

9.2

Technical Support............................................................... 34

Service Manual for Bosch Built-in Wall Ovens

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