HOUNÖ

SERVICE MANUAL - US
CPE & KPE Visual Cooking Models (Gas & Electric)

Software Version 1_3_4 07/2016

CAUTION: Read these instructions before servicing the oven

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 TABLE
 OF CONTENTS

INTRODUCTION 5

LOCATING THE SERIAL NUMBER OF

THE OVEN 6

USING THE SMARTTOUCH DISPLAY 7

Basic Operations   7

SETTINGS MENU 8

CHANGING SETTINGS ON THE USER

MENU 9
Setting the Oven Light   9
Setting the Screen Saver   9
Setting the Language   9
Setting the Setup Clock   10
Viewing the Software Version   10

CHANGING SETTINGS ON THE

SUPERUSER DISPLAY 11
Setting Alarm Sounds    11
Changing Settings   13
Adjustments   15
Calibrating ClimaOptima Auto Humidity   17
Calibrating the Oven Door Sensor   18
Logs and Statistics   19

SETTINGS ON THE TECHNICIAN

MENU 21
Using the Test Functions   21
Changing the Oven Set-up   26
Gas Settings   27
Making Temperature Adjustments   29
Changing Oven Settings   30
Deliming Settings   31
Making Corrections to Bake Time   32
Specifying Middle East Specific Settings   33
Enabling Demo mode   33

TROUBLESHOOTING

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 TABLE OF CONTENTS

34
General Error Codes   34
Gas Error Codes   49

APPENDIX A:
BURNER ELECTRODE ADJUSTMENTS 53

APPENDIX B:
MEASURING GAS PRESSURE 55

APPENDIX C:
GAS BURNER SETTINGS 56

APPENDIX D:
TOUCH CONTROLLER “XPE” – SET-
UP AND ADJUSTMENT 59
Converting A Gas Oven to Another Gas Type   59

APPENDIX E:
GAS PRESSURE-SWITCH
ADJUSTMENT 60

APPENDIX F:
GAS SEQUENCE DIAGRAM 62

APPENDIX G:
GAS COMPONENTS POSITION 63

APPENDIX H:
GAS COMPONENTS 65

APPENDIX I:
IDENTIFYING GAS-AIR UNITS AND
COIL 66

APPENDIX J:
ERROR CODES ON DUNGS’ CONTROL
BOX 67

SAFETY 71

SERVICE MANUAL 3
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4 SERVICE MANUAL
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 Introduction

INTRODUCTION
Dear customer,

Thank you for choosing a Visual Cooking oven from HOUNÖ.

This manual contains the information you need to service and maintain your oven. We
recommend that you read the manual and familiarize yourself with the service settings and
functions of the oven. This will ensure optimal cooking results and safety.
lease make the manual available to all who service and maintain the oven and retain it
for future reference.
The latest version of the manual can be downloaded from www.houno.us.

Note that this document is subject to change without notice.

SERVICE MANUAL 5
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 Utility Connections

UTILITY CONNECTIONS
IMPORTANT
WARNING: Improper
installation, adjustment,
alternation, service or
maintenance can cause THE SERVICE INSTRUCTIONS CONTAINED HEREIN ARE FOR THE USE OF QUALIFIED
property damage, injury INSTALLATION AND SERVICE PERSONNEL ONLY. INSTALLATION OR SERVICE BY OTHER
or death. Read the instlla- THAN QUALIFIED PERSONNEL MAY RESULT IN DAMAGE TO THE OVEN AND/OR INJURY TO
tion, operation and main- THE OPERATOR.
tenance instructions
thoroughly before in- Qualified service/installation personnel are individuals, a firm, a corporation, or a company
stalling or servicing this which either in person or through a representative are engaged in, and responsible for:
equipment.
INSTRUCTIONS TO BE
FOLLOWEDIN THE EVENT • the service/installation or replacement of gas piping and the connection, installation,
THE USER SMELLS GAS repair or servicing of equipment.
MUST BE POSTED IN A • the installation, repair or service of electrical wiring from the electric meter, main
PROMINENT LOCATION. control box or service outlet to the electric appliance.
This information may be • Qualified installation/service personnel must be experienced in such work, familiar
obtained by contacting with all precautions required, and have complied with all requirements of state or local
your local gas supplier. authorities having jurisdiction.
FOR YOUR SAFETY
Do not store or use
gasoline or other flam-
mable vapors or liquids in
the vicinity of this or any
other appliance.
The information con-
tained in this manual is
important for the proper
installation, use, and
maintenance of this oven.
Adherence to these pro-
cedures and instructions
will result in satisfactory
baking results and long,
trouble free service.
Please read this manual
carefully and retain it for
future reference.
ERRORS: Descriptive,
typographic or pictorial
errors are subject to cor-
rection. Specifications are
subject to change without
notice.

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 Standards and Codes

STANDARDS AND CODES

U.S. and Canadian installations

The installation must conform with local codes, or in the absence of local codes,
with the National Fuel Gas Code, ANSI Z223.1/NFPA 54, or the Natural Gas and
Propane Installation/service Code, CSA B149.1, as applicable.
Installation/service must conform with local codes, or in the absence of local
codes, with the National Electrical Code, ANSI/NFPA 70-Latest Edition and/or
Canadian National Electric Code C22.1 as applicable.
Appliance is to be installed with backflow prevention in accordance with applicable
federal, province and local codes.

Australia and general export installations

Installation must conform with Local and National installation standards. Local
installation codes and/or requirements may vary. If you have any questions
regarding the proper installation, service, repair and/or operation of your HOUNÖ
oven, please contact your local distributor. If you do not have a local distributor,
please call the HOUNÖ Oven Company at +45 87 11 47 11.

SERVICE MANUAL 7
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 Locating the Serial Number of the Oven

LOCATING THE SERIAL

NUMBER OF THE OVEN
When you order parts or request service for your Visual Cooking oven, you need the oven’s
Serial Number,

You can find the Serial Number and Type information on the right-hand corner post of the
oven as shown in the illustration.

The serial number plate contains vital information about the oven.

• Produktion year and months.

• Model type and size.

• Voltage, power, phaces and frequence.

• Power consumtion.

• Wiring diagram number.

• Gas inlet pressure.

• Water inlet max/min pressure.

• Ipx grating.

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 Using the SmartTouch® Display

USING THE
SMARTTOUCH®
DISPLAY
The SmartTouch display provides a friendly and easy way for you to operate and interact
with the Visual Cooking oven. You simply use the pads of your fingertips to perform the
operations.

Basic Operations
•• To select an item, touch the button.
•• To scroll through a list, drag your finger up or down.
•• To return to the previous display push the arrow button in the upper left corner.
•• To change cooking function while the oven is operating, push the down arrow
button in the upper right corner.
•• To save current settings and move on to the next step, push the right arrow button
in the upper right corner.

SERVICE MANUAL 9
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 Settings Menu

SETTINGS MENU
Before you can start the maintenance process or change settings, you have to open the
Settings Menu.

•• On the Main Menu, touch the gear wheel icon to enter the Settings Menu.

Role Access rights

User Access to the User menu

SuperUser Access to the User and SuperUser menus

Technician Access to User, SuperUser, and

Technician menus

The settings you have access to depend on the role you have been assigned.

SuperUser Code

If start-up permission is set to User, you have to enter the SuperUser code to gain access
to the SuperUser menu.

1. On the Main Menu, touch the key icon .

2. On the Choose menu, touch the key icon , and then enter the code. The code is
876412.

Technician Code

If start-up permission is set to User or SuperUser, you have to enter the Technician code to
gain access to the Technician menu.

1. On the Main Menu, touch the key icon .

2. On the Choose menu, touch the key icon , and then enter the code. The code is
576021.

Note The computer has been thoroughly tested by the manufacturer prior to delivery,
and the settings have been carefully reviewed. You should therefore only allow qualified
personnel to make changes to the settings. Contact your supplier for more information.

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 Settings Menu

Menu tree
• Main menu

• User menu

• SuperUser menu

• Technician menu

Main menu
Recipes

Favourites

Manual

Advanced

USER MENU SUB LEVEL PARAMETER

MENU

Oven light continuous - 5min

Screen saver 1min - 1hour

Language 25 different languages

Setup clock Set min - hour - date

Software version x_x_xx (info only)

Oven serial number XX XX XXXXX (info only)

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 Settings Menu

SUPER SUP LEVEL SUB LEVEL PARAMETER

USER MENU MENU MENU SETINGS

Sounds Finished Sound file 138 sound files

Recipe notification
Racktimer finish Pepeat 1-100 repetistions
Door open
Probe missing volume 0-100%
Insert produckt
epeat delay 0,5sec - 60,0 sec
Error
Timer start Playback rate 0,5-2,0
Preheat done
Set defaults Test sound Test

Settings HACCP login Yes - No

Menu star Yes - No

Start Picture Yes - No

Core probe warning Yes - No

Temp unit Celsius - Fahrenheit

Volume syetem Metric - US

Hardness unit German degress - PPM

Cook to perfection Yes - No

CTP tolerance 5 - 25

CTP threshold 40 - 90%

Start up permission User - Super user

Core temp Yes - No

Time format 12- 24 houer

Date format DD-MM-YYYY

Restart key Non - Display - Both

Restat time 1 - 9min

Restart after power failure No restat

10-20-30 min

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 Settings Menu

SUPER SUP LEVEL PARAMETER

USER MENU MENU SETINGS

Adjustments Cook and hold offset 3 - 10 degres

Delta T offset 10 - 70 Degres

Cook and Regain pulse interval 3 - 24 sec

Proving pulse interval 12 - 44 sec

Proving pulse legth

Calibrate Calibrate front door Follow instruction

Calibrate back door Follow instruction

Calibrate auto humid Follow instruction

Logs and statistiks Fault Log All triggered alarms

Fault statistics Error list and counts

Service counter Compoment on time

Energy meters KW used

Water meters Total liter counter

Trip counter

Hardness

Filter

Filter alerts

Filter changed

Chemicals Level Warning

Container

Replaced

Level warning

Container

Replaced

SERVICE MANUAL 13
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 Settings Menu

SUPER USER SUP LEVEL PARAMETER

MENU MENU SETINGS

Sub system report Generats system report

Install new software Application update

Restart oven Restart oven YES - NO

License manager Purchace the license codes Keypad

from HOUNÖ to unlock/activate
special features. Advanced racktimer

QSR

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 Settings Menu

TECNICIAN SUP LEVEL PARAMETER

MENU MENU SETINGS

Test function Oven test Main Exhaust

contactor

Heat Drain

Cooling fan Jet

Oven light Fan

Door 1 (open - closed)

Door 2 (open - closed)

Oven temperature (C/F°)

Drain temperature (C/F°)

Exhaust (open - closed

Fan test High left High right

Low Left Low right

Stop Main contactor

RPM 1 (1 - 1400)

ACC 1 (sec)

RPM 2 (1-1400)

ACC 2 (sec)

Press sense (0-5V)

Output for frequency inverter

(1-10V)

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 Settings Menu

TECNICIAN SUP LEVEL PARAMETER

MENU MENU SETINGS

Test function Steam test Heat Fill

Main contactore Empty

Delime pump

Generator temp (C/F°)

Level (low - high)

Level sensor input (xx)

Set level (50 - 80)

Wash Detergent Rinse aid

Water Main contactor

Fan Heat

Water pressure (yes - no)

Oven temperature (C/F°)

Rinse aid (xx%)

Detergent (xx%)

Miscellaneous test External vent Restart lamp

Core temp C/F°

C/F°

C/F°

Restart button (on - off)

Press.sens (V)

I/O temp (C/F°)

CPU temp (C/F°)

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 Settings Menu

TECNICIAN SUP LEVEL PARAMETER

MENU MENU SETINGS

Test function Alarm test Main contactor

24V (on - off)

Fan (on - off)

Oven (on - off)

Generator (on - off)

S S Relay (on - off)

Oven setup Oven number input Enter serial number

Heating Electric

Gas LPG, 3P

Gas G20

Gas G25

Oem HO - BL - LE - LA - DI - KB

Oven type BPE - CPE - KPE

Oven size 1,06 - S1,10

Wash system None - CombiWash

Drain cooling Off

On - when using water

On - All functions

Auto Humidity Yes - No

Pass - Through Yes - No

Show display Yes - No

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 Settings Menu

TECNICIAN SUP LEVEL PARAMETER

MENU MENU SETINGS

Oven setup Delime Deliming Start delime

Delime Flush

Auto delime Yes - No

Delime interval Off-30-60-90H

Forced wash Off - 2min - 30 Houers - 40 Houers

Gas settings Off delay door open Off-10-20-30sec

Min speed gas 1 1000 - 8000

Start speed gas 1 1000 - 8000

Max speed gas 1 1000 - 8000

Min speed gas 2 1000 - 8000

Start speed gas 2 1000 - 8000

Max speed gas 2 1000 - 8000

Adjustments Oven temp offset -10 +10

Core temp offset -10 +10

Core temp sous vide -10 +10

Detergent conversion 10 - 30 ML/S

Rinse Aid conversion 10 - 30 ML/S

Settings Fan Speed alarm Yes - No

Need rinse Yes - No

Need steam Yes - No

generator rinse

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 Settings Menu

TECNICIAN SUP LEVEL PARAMETER

MENU MENU SETINGS

Middle east Yes - No

Update platform

Demo mode Yes - No

Demo mode acc. 1 -5

Load help from USB Yes - No

Touch sensitivity 1-8

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 Changing Settings on the User Menu

CHANGING SETTINGS
ON THE USER MENU
You change the basic settings from the User Menu.

•• On the Settings Menu, touch the User button.

Setting the Oven Light

1. To set oven light, touch Oven light.

2. Drag your finger up or down to select Continuous or 5 min., and then touch OK.

Setting the Screen Saver

1. To set the screen saver, touch Screen saver.

2. Drag your finger up or down to select the desired setting. Select how much time
elapses before the screen saver becomes active. Select Off if you do not want the
screen saver on.

3. Touch OK.

Setting the Language

1. To set the language, touch Language.

2. Drag your finger up or down to select the desired language, and then touch OK.

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 Settings Menu

Setting the Setup Clock

1. To set the clock, touch Setup clock.

2. In the hour and min. lists drag your finger up or down to select the desired time.

3. In the day, month and year lists drag your finger up or down to select the desired
date.

4. Touch OK.

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 Changing Settings on the SuperUser MENU

CHANGING SETTINGS
ON THE SUPERUSER
MENU
You can access the following areas on the super user display.

•• Sounds (See Setting Alarm Sounds on page 22)

•• Settings (See Changing Settings on page 24)
•• Adjustments (See Adjustments on page 26)
•• Calibrate auto humidity
(See Calibrating ClimaOptima Auto Humidity on page 28)
•• Calibrate (See Calibrating the Oven Door Sensor on page 29)
•• Logs and statistics (See Logs and Statistics on page 30)
•• USB system report
•• Install new software
•• Restart oven

Setting Alarm Sounds

You can have the Visual Cooking oven play a sound (alarm) when certain events occur.
You have a number of options when you assign a sound to an event. It is possible to adjust,
among other things, the volume and the time elapsed between each reminder.

1. On the SuperUser display, touch Sounds.

2. To change a sound, touch the event that you want to assign a sound for. The
following events are available:

•• Finished
•• Recipe notification
•• Racktimer finish
•• Door open
•• Probe missing
•• Insert product
•• Error
•• Timer start

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 Changing Settings on the SuperUser MENU

3. Set the desired sound properties. For each event, you can specify the following
properties.

Property What it does

Sound Set Used to select the desired sound set for the alarm. The default
sound set is Android.

Sound File Used to select the specific sound from the set. You can then
test the sound by touching the Test Sound button.

Repeat Used to specify for how many times the alarm should be
repeated.

Start repeat delay Used to specify the interval between the first and the second
sounding of the alarm.

End repeat delay Used to specify the interval between the second to last and the
final sounding of the alarm.

End repeat delay Used to specify the interval between the sounding of the alarm
after after the first sounding of the alarm.

Start volume Used to specify the volume at the first sounding of the alarm.

End volume Used to specify the volume after the final sounding of the
alarm.

End volume after Used to specify how many times the sound should be repeated
until it reaches the volume specified in End volume.

Start playback rate Used to specify the playback frequency of the first sounding of
the alarm. The interval ranges from 0.5 to 2.0 with intervals of
0.1.

End playback rate Used to specify the playback frequency at the final sounding of
the alarm.

End playback rate Used to specify the playback frequency of the alarm while it is
after being repeated.

Test sound Used to test the sound specified in Sound File.

4. Follow the steps above for all events to which you want to assign a sound.

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 Changing Settings on the SuperUser MENU

Changing Settings
The following describes the settings you can change via the SuperUser Menu.

HACCP Logging

You can specify whether you want the oven to automatically store and save HACCP (Hazard
Analysis and Critical Control Points) data about the preparation process. If you enable
this option, you can access information about production time and duration as well as
production temperature and core temperature. The default setting is No.

1. On the SuperUser display, touch Settings, and then touch HACCP logging.

2. Drag your finger up or down to select Yes or No, and then touch OK.

Menu Start

You use Menu Start to specify which display is the first display the user sees. The default
setting is No, which means that the first display is the Menu display. If the setting is Yes, the
first display is Recipes.

However, some users only have access to a limited number of functions and it can therefore
be useful to specify that a different display is shown.

1. On the SuperUser display, touch Settings, and then touch Menu Start.

2. Select No for Menu as the first display, and Yes for Recipes as the first display.

Start Up Permission

You use Start up permission to specify whether the oven starts up in User or SuperUser
mode. The default setting is SuperUser.

1. On the SuperUser display, touch Settings, and then touch Start up permission.

2. Drag your finger up or down to select User or SuperUser, and then touch OK.

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 Changing Settings on the SuperUser MENU

Core Temperature

You use the Core temp. setting to specify whether the oven comes with a core temperature
probe. The default setting is Yes.

1. On the SuperUser display, touch Settings, and then touch Core temp.

2. Drag your finger up or down to select Yes or No, and then touch OK.

Core Temperature Sous Vide

You use the Core temp sous vide setting to specify whether the oven comes with a thin
probe that is used specifically for sous vide products. The default setting is No.

1. On the SuperUser display, touch Settings, and then touch Core temp sous vide.

2. Drag your finger up or down to select Yes or No, and then touch OK.

Time Format

You use the Time format setting to specify whether you want the oven to use a 24-hour
time format or a 12-hour time format. The default setting is 24.

1. On the SuperUser display, touch Settings, and then touch Time format.

2. Drag your finger up or down to select 24 or 12, and then touch OK.

Date Format

You use the Date format setting to specify how you want the date displayed. The default
setting is DD-MM-YYYY.

1. On the SuperUser display, touch Settings, and then touch Date format.

2. Drag your finger up or down to select DD-MM-YYYY or MM-DD-YYYY, and then

touch OK.

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 Changing Settings on the SuperUser MENU

Temperature Unit

You use the Temp. unit setting to specify which temperature unit you want to use. The
default setting is Celsius.

1. On the SuperUser display, touch Settings, and then touch Temp. unit.

2. Drag your finger up or down to select Celsius or Fahrenheit, and then touch OK.

Adjustments
Cook and Hold Offset

You use the Cook and hold offset setting to specify the difference between the core
temperature and the oven chamber temperature when Cook & Hold cooking mode is used.
The default setting is 5.

1. On the SuperUser display, touch Adjustments, and then touch Cook and hold
offset.

2. Drag your finger up or down to select 3, 5 or 10 and then touch OK.

DeltaT Offset

You use the DeltaT offset setting to specify the difference between the core temperature
and the oven chamber temperature when DeltaT cooking mode is used. The default setting
is 20.

1. On the SuperUser display, touch Adjustments, and then touch DeltaT offset.

2. Drag your finger up or down to select a setting between 10 and 70 and then touch
OK.

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 Changing Settings on the SuperUser MENU

Reheat Pulse Interval

You use the Reheat pulse interval setting to specify the interval in seconds between injec-
tions of water during the regeneration process. The injection itself lasts 1/10 of a second.
The default setting is 8 seconds.

1. On the SuperUser display, touch Adjustments, and then touch Reheat pulse
interval.

2. Drag your finger up or down to select from 4s to 24s in intervals of 2 and then
touch OK.

Proving Pulse Interval

You use the Proving pulse interval setting to specify the interval in seconds between injec-
tions of water during the proving process. The injection itself lasts 1/10 of a second. The
default setting is 20 seconds.

1. On the SuperUser display, touch Adjustments, and then touch Proving pulse
interval.

2. Drag your finger up or down to select from 12s to 44s in intervals of 4, and then
touch OK.

Proving Pulse Length

You use the Proving pulse interval setting to specify for how long each injection of water
lasts during the proving process. The default setting is 1 second.

1. On the SuperUser display, touch Adjustments, and then touch Proving pulse
length.

2. Drag your finger up or down to select the preferred length: 0.6, 1.0 or 2.0
seconds, and then touch OK.

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 Changing Settings on the SuperUser MENU

Calibrating ClimaOptima Auto Humidity

You use the Calibrate auto humidity setting to calibrate the ClimaOptima humidity sensor.
The oven has been calibrated prior to delivery, but we recommend that you calibrate the
oven after the oven has been installed in its proper location.

Calibration is Required After the Following Events:

•• The CPU board has been replaced.

•• The differential sensor has been replaced.
•• The fan wheel has been removed and mounted.
•• The fan wheel has men replaced.
•• The filter housing has been replaced.

Warning. Before you begin the calibration process, take the following precautions:

•• The oven must be dry

•• The oven temperature must not exceed 40°C/104°F.
Do not interrupt the calibration process, and do not open the oven door. If the calibration
process is started by mistake, turn off the oven.

Starting the ClimaOptima Calibration Process

1. On the SuperUser display, touch Calibrate auto humid. Calibrate ClimaOptima is

displayed.

2. Touch Start to begin the calibration process.

The following table lists the steps involved in the calibration process.

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 Changing Settings on the SuperUser MENU

Step Time Temp. (Celsius) Oven Exhaust

1 Cal. Approx. 15 min. 70 Dry Open

2 Cal. Approx. 2 min. 70 Dry Open

3 Cal. Approx. 2 min. 70 Dry Closed

4 Cal. Approx. 8 min. 250 Dry Open

5 Cal. Approx. 3 min. 250 Dry Closed

6 Cal. Approx. 5 min. 190 Wet Closed

7 Cooling Approx. 30 sec. 105 Open

8 Cal. Approx. 5 min. 130 Wet Closed

9 Cooling Approx. 8 min. 45 Open

10 Cal. Approx. 4 min. 70 Wet Closed

Calibrating the Oven Door Sensor

You use the Calibrate setting to calibrate the oven door sensor. The oven door sensor has
been calibrated prior to delivery, but we recommend that you calibrate the oven after the
oven has been installed in its proper location and when the CPU has been replaced.

If you have a Pass-Through oven with both a front and a back door, you have to calibrate
both sensors.

The measurement is an internal value that expresses the distance between the magnet and
the sensor.

Starting the Oven Door Calibration Process

1. On the SuperUser display, touch Calibrate front door.

2. On the Calibrate front door display, you can see the status of the door.

3. Close the door so that the door status is Closed, and then touch Press when door
closed.

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 Changing Settings on the SuperUser MENU

4. Open the door so that the door is in the first step open position and then touch
Press when door open.

5. Look at the Threshold and Actual values.

•• The Threshold value displays the value that marks the shift between status door
open and the status door closed.
•• The Actual value displays the actual input from the sensor. The actual value
must be greater than 10 when the door is closed.

6. Verify that a green checkmark is displayed next to Press when door closed and
Press when door open. If the values are not acceptable, the display shows Door
sensor error. See Troubleshooting on page 22 for more information.

7. Touch Done to end the calibration process.

If the door has not been calibrated, a warning is displayed asking if you want to exit
anyway.

Note If the oven has both a front and a back door, you calibrate the sensor of the back
door by touching Calibrate back door. You then go through the same steps as described
above.

Logs and Statistics

You can use the logs and statistics to see which processes failed and when they failed.

Fault Log

The Fault log displays the latest thirty errors in a list with the most recent error on top.

1. On the SuperUser display, touch Logs and statistics, and then touch Fault log.
The fault log is displayed.

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 Changing Settings on the SuperUser MENU

Fault Statistics

The Fault statistics list displays a list of all error codes, the number of times each error code
has been displayed, and the date the error code was last displayed.

1. On the SuperUser display, touch Logs and statistics, and then touch Fault
statistics. The fault statistics list is displayed.

2. To clear the fault statistics list and the fault log list, touch Reset, and then touch
Yes.

Service Counters

The Service Counters list displays how often a component has been activated and for how
long.

1. On the SuperUser display, touch Logs and statistics, and then touch Service
counters. The service counter list is displayed.

2. To clear the service counter list, touch Reset, and then touch Yes.

Install new software

You use the Install new software to upload the latest software version.

1. On the SuperUser display, touch Install new software, and then touch OK.
The OvenApp is displayed.

2. Touch Install to install the latest software.

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 Settings on the Technician Menu

SETTINGS ON THE
TECHNICIAN MENU
You can access the following areas on the Technician Menu.

•• Test Functions (See Using the Test Functions on page 32)

•• Oven setup (See Changing the Oven Set-up on page 37)
•• Gas settings (See Gas Settings on page 38)
•• Adjustments (See Making Temperature Adjustments on page 40)
•• Settings (See Changing Oven Settings on page 41)
•• Delime (See Deliming Settings on page 42)
•• Bake time correction (See Making Corrections to Bake Time on page 43)
•• Middle East (See Specifying Middle East Specific Settings on page 44)
•• Demo mode (See Enabling Demo mode on page 44)

Using the Test Functions

The test functions are useful for fault finding. You can test the following functions.

•• Oven
•• Fan
•• Steam
•• Wash
•• Miscellaneous
•• Main alarm
•• Gas

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 Settings on the Technician Menu

Testing the Oven

1. On the Technician display, touch Test functions, and then touch Oven.

2. Touch each button in turn to test the functions. The button turns green if the
component is active.

3. At the bottom of the display the status of a number of input functions is

displayed.

Value Description

Door 1 Displays whether the door is open or closed. Door 2 is only

displayed if the oven is a pass-through oven.

Oven temperature Displays the current temperature in the oven chamber.

Drain temperature Displays the current temperature in the drain.

Exhaust Displays whether the exhaust is open or closed.

Testing the Fan

1. On the Technician display, touch Test functions, and then touch Fan.

2. Touch each button in turn to test the fan. The status of each function is shown at
the bottom of the display. The button turns green if the component is active.

Value Description

RPM Displays fan revolutions per minute.

ACC. Displays the acceleration time.

Press sens. Displays the voltage of the ClimaOptima sensor

Output for frequency Controls fan speed.

inverter 0-10V

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 Settings on the Technician Menu

Testing the Steamer

1. On the Technician display, touch Test functions, and then touch Steam.

2. Touch Empty to empty the steam generator, and then ensure that the
displayed Level value is Low.

3. Touch Fill to fill the steam generator, and then ensure that the displayed Level
is High.

4. Slide the water level bar to the left or right to set the level, which should be
between the Low and High level values. The default value is 75.

Value Description

Generator temperature Displays the current temperature of the steam

generator.

Level Displays the water level as High or Low.

Sensor input Reads the value from the sensor. The value changes
depending on whether the level has been set to high or
low.

Set level (50-80) Sets the water level. The default value is 75. A low value
is normally around 80. The value depends on the quality
of the water.

Testing the CombiWash Function

1. On the Technician display, touch Test functions, and then touch Wash.

2. Touch each button in turn, to determine whether the detergent and rinse aid pumps
are working properly. The Water button tests whether the solenoid valve is working
properly.
The water pressure must be at least 2.5 bars when using CombiWash.

Value Description

Water pressure Displays Yes when the water pressure is ok and No when
the water pressure is low.

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 Settings on the Technician Menu

Testing the External Ventilator and the Restart Lamp

1. On the Technician display, touch Test functions, and then touch Miscellaneous.

2. Touch External vent, to test if the external ventilation is working. The outlet
is named terminal no.2. When external ventilation is activated, the outlet is
active during program performance and until 10 minutes after the program has
completed.

3. Touch Restart lamp, to test that the restart lamp is active.

4. To test the probes, you can, for example, place each probe in hot water or ice water.

Value Description

Core 1 temperatures Displays the temperature of each of the 3 sensors on

the probe.

Core 2 temperatures Displays the temperature of each of the 3 sensors on

the probe.

Restart button Displays the status of the restart button. Should

switch from Off to On when you touch the Restart
button. The button is located on the backside on the
oven. The button is only available on pass-through
ovens.

Press. Sens. Displays the voltage of the pressure sensor. The value
is between 0 -5 volts.

IO temp. Displays the temperature of the IO board. The

temperature increases if the cooling fan is broken.

CPU temp. Displays the temperature of the CPU board. The

temperature increases if the cooling fan is broken.

Important note: External ventilation 1 and 2 only control the voltage and therefore they
must be connected through an external relay with a maximum voltage of 24V.

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 Settings on the Technician Menu

Testing the Alarm

This function tests the thermo-switch circuit.

5. On the Technician display, touch Test functions, and then touch Main alarm.

6. Touch Main contactor. If all status values are displayed in green and the status is
On, it indicates that the alarm is working properly. If a value is displayed in red and
the status is Off, a fault has occurred.

Value Description

24V Displays whether the alarm is on or off.

Fan Displays whether the alarm is on or off.

Oven Displays whether the alarm is on or off.

Generator Displays whether the alarm is on or off.

S S Relay Displays whether the alarm is on or off.

Testing the Gas Functions

1. On the Technician display, touch Test functions, and then touch Gas.

2. Touch each button in turn to test the gas functions. Note that oven types 1.20 and
2.20 have both a Heater 1 and a Heater 2 button.

Value Description

Oven temperature Displays the current oven temperature.

Gas valve Displays whether the gas valve is Off or On.

Pressure switch Displays whether the pressure switch is Off or On.

Fan set point Displays the specified rpm value

Fan speed Displays the fan revolutions per minute.

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 Settings on the Technician Menu

Changing the Oven Set-up

Specifying the Heating System

1. On the Technician display, touch Oven setup, and then touch Heating.

2. Slide your finger up or down to select Electric or Gas LPG, GAS LPGB, GAS G20
Pr, GAS G25, and then touch OK. You can see whether the oven is a gas or an
electric oven on the serial plate located on the oven exterior on the bottom right
side.

Specifying the Oven Type

1. On the Technician display, touch Oven setup, and then touch Oven type.

2. Slide your finger up or down to select the correct oven type: BPE, CPE, or KPE, and
then touch OK. You can see the oven type on the serial plate located on the oven
exterior on the bottom right side.

Specifying the Oven Size

1. On the Technician display, touch Oven setup, and then touch Oven size.

2. Slide your finger up or down to select the correct oven size, and then touch OK.
You can see the oven size on the serial plate located on the oven exterior on the
bottom right side.

Setting the Wash System

1. On the Technician display, touch Oven setup, and then touch Wash system.

2. Slide your finger up or down to select the correct wash system, None, BlueCycle or
CombiWash, and then touch OK. BlueCycle is only available on OEM ovens.

Wash system Description

CombiWash Automatic cleaning cycle

BlueCycle Automatic cleaning cycle used for OEM ovens.

None Used when the oven is cleaned manually

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 Settings on the Technician Menu

Setting the ClimaOptima function

1. On the Technician display, touch Oven setup, and then touch Auto humidity.

2. Slide your finger up or down to select Yes or No. Select Yes to enable ClimaOptima
and No to disable ClimaOptima.

Setting Up a Pass-through Oven

Use this function to specify whether the oven is a pass-through oven that can be loaded
and unloaded both from the front and the rear side.

1. On the Technician display, touch Oven setup, and then touch Pass-through.

2. Slide your finger up or down to select Yes or No. Select Yes if the oven is a pass-
through oven and select No if the oven only has 1 door.

Setting the CombiNet Function

Use this function to specify whether the oven can be connected to a network.

1. On the Technician display, touch Oven setup, and then touch Net.

2. Slide your finger up or down to select Yes or No. Select Yes if the oven is a
CombiNet oven and select No if the oven cannot be connected to a network.

Gas Settings
1. On the Technician display, touch Gas settings. You can now change the speed of
the gas air control according to the gas type that is being used. For more infor-
mation, See Appendix C: Gas Burner Settings on p. 34.

2. Gas 1: smaller ovens with one gas fan: 1.06, 1.10, 2.06, 2.10 and larger ovens with
two gas fans: 1.20, 2.20

3. Gas 2: larger ovens with two gas fans 1.20, 2.20

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 Settings on the Technician Menu

Setting Description

Min speed gas 1 Touch Min speed gas 1, and the slide your finger up or down
to select the preferred value, and then touch OK.

Start speed gas 1 Touch Start speed gas 1, and the slide your finger up or
down to select the preferred value, and then touch OK.

Max speed gas 1 Touch Max speed gas 1, and the slide your finger up or down
to select the preferred value, and then touch OK.

Min speed gas 2 Touch Min speed gas 2, and the slide your finger up or down
to select the preferred value, and then touch OK.

Start speed gas 2 Touch Start speed gas 2, and the slide your finger up or
down to select the preferred value, and then press OK.

Max speed gas 2 Touch Max speed gas 2, and the slide your finger up or
down to select the preferred value, and then touch OK.

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 Settings on the Technician Menu

Making Temperature Adjustments

Use this function to adjust the oven or the core temperature offsets. This is useful when
the temperature should correspond with the temperature of a 3rd party probe. The default
setting is 0.

Adjust the Oven Temperature

1. On the Technician display, touch Adjustments.

2. Touch Oven temp offset.

3. Slide your finger up or down to select the preferred offset. You can adjust the
temperature offset up or down by 10°C (50°F) in 1°C increments.

Adjust the Core Temperature

1. On the Technician display, touch Adjustments.

2. Touch Core temp offset.

3. Slide your finger up or down to select the preferred offset. You can adjust the
temperature by 1-degree increments

Adjust the sous vide temperature

1. On the Technician display, touch Adjustments.

2. Touch Core temp sous vide offset.

3. Slide your finger up or down to select the preferred offset. You can adjust the
temperature by 1-degree increments

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 Settings on the Technician Menu

Changing Oven Settings

1. On the Technician display, touch Settings. You can now change the following
settings.

Setting Description

Custom mode Settings only applicable to a specific customer.

Soap level monitoring Yes/No setting.

Select Yes to display a message when the rinse or soap

containers must be changed. Can only be used with
standard 5 liter containers.

Drain cooling Yes/No setting.

Select Yes to automatically cool down the drain when

the temperature exceeds 75°C/167°F. Cooling stops at
70°C/158°F. Note that local rules and regulations may vary.

Fan speed alarm Yes/No setting.

Select Yes if you want the oven to sound an alarm when the
fan speed is too slow.

Restart key Display/Both/None setting. This setting only applies to

pass-through ovens.

Select Display if you only want to enable the restart button

on the front display.

Select Both if you want to enable the restart button on the

front display as well as the physical restart button on the
rear side of the oven.

Select None, if both buttons should be disabled.

Restart time Specifies the restart time.

Restart after power Yes/No restart setting.

failure
Select Yes if you want the oven to restart after power
failure. The oven restarts at the function it was in at the time
of the power failure.

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 Settings on the Technician Menu

Deliming Settings
The Delime program is used to descale the steam generator. This function is not used if the
oven is connected to a water treatment filter.

Starting the Deliming Program

1. On the Technician display, touch Delime.

2. To start the delime program, touch Delime Program.

3. Touch Delime to start the program.

4. A message is displayed asking if the oven is empty. Verify that the oven is empty,
and then select Yes and touch OK.

5. The deliming program starts. The display shows the current step of the process.

6. When the deliming process has finished, the display shows a message saying
“Descale is done”, and an alarm sounds for 5 seconds. Touch OK.

Enabling or Disabling Automatic Deliming

This function is only available for OEM ovens.

1. On the Technician display, touch Delime.

2. Touch Auto delime.

3. Select Yes or No and then touch OK.

Specifying the Deliming Interval

Use this function to specify how often you want the oven to display a message saying that
the oven needs to be delimed.

1. On the Technician display, touch Delime.

2. Touch Delime interval.

3. Slide your finger up or down to select the preferred interval: 30, 60, or 90 hours,
and then touch OK.

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 Settings on the Technician Menu

Flushing the descaler

1. On the Technician display, touch Delime.

2. Touch Delime Program.

3. Touch Delime.

4. Touch Delime Flush.

The flushing program starts, and the displays shows the current step of the process.

Making Corrections to Bake Time

Use this function to enable or disable automatic recalculation of the bake time in case of
mistakes such during the baking process.

Enabling or Disabling Automatic Bake Time Corrections

1. On the Technician display, touch Bake time correction.

2. Touch BTC enabled, drag your finger up or down to enable or disable bake time
corrections, and then touch OK.

Specifying Bake Time Correction Tolerance

1. On the Technician display, touch Bake time correction.

2. Touch BTC tolerance, drag your finger up or down to select the preferred value and
then touch OK.

Specifying Bake Time Correction Threshold

1. On the Technician display, touch Bake time correction.

2. Touch BTC threshold, drag your finger up or down to select the preferred value and
then touch OK.

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 Settings on the Technician Menu

Specifying Middle East Specific Settings

Enabling this setting disables all recipes containing pork.

1. On the Technician display, touch Middle East.

2. Touch Yes, and then touch OK.

Enabling Demo mode

When you want to use the oven for demonstration purposes, you should enable demo
mode. When demo mode is enabled, the heating elements and the steam generator will not
be switched on when the oven is running.

1. On the Technician display, touch Demo Mode.

2. Touch Yes, and then touch OK.

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 Settings on the Technician Menu

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 Cleaning

CLEANING
Daily cleaning of the oven is recommended for hygienic reasons and to avoid interruptions
of operation.

The design of the HOUNÖ ovens allows quick and easy cleaning. The oven chamber is made
of all-welded stainless steel, which makes it splash proof. You will therefore find the easy-
to-use handshower (optional extra), which is located under the front panel, very suitable for
interior cleaning.

The door sealing is easy to remove, which ensures quick and efficient cleaning under and
around it.

Furthermore, the flat front panel makes exterior cleaning simple and efficient.

To give the oven an extra shine, we recommend HOUNÖ steel oil which is available from
your oven supplier (0.5 litre: part No. 045650 – 5 litres: part No. 045654).

Cleaning the oven chamber

Use CombiWash, level 1-4 (note that CombiWash should be ordered as optional extra
together with the oven as it cannot be retrofitted) or the semi-automatic cleaning program
(See Description of Functions on page 13), or do as follows:

•• Always clean in a cold oven or cool the oven chamber down to below 80°C.
•• Let the oven run in CombiSmart at 80°C for 15 minutes.
•• Apply HOUNÖ oven detergent to the sides of the oven chamber, racks, etc.
(according to requirement) using a soft brush or a spray pistol. Protect your face
and hands as the detergent may cause irritation should it come into contact with
your skin.
•• Let the detergent work for 10 minutes.
•• Let the oven run in CombiSmart at 80°C for 15 minutes.
•• Rinse the oven chamber with water (using a soft brush or the handshower (optional
extra)).
•• If the oven is not connected to a soft-water plant, we recommend that you use
HOUNÖ rinse aid and wipe the oven chamber with a dry cloth.

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 Cleaning

Cleaning the Oven Exterior

1. Use a soft, damp cloth and a liquid detergent to clean the oven cabinet on the
outside,

2. Remove the door sealing to clean under and around the door,

3. Treat the surface with HOUNÖ STEEL OIL to protect it. The steal oil is available from
your supplier.(0.5 litre: part No. 045650 and 5 litres: part No. 045654)

Note: do not use a water hose or high-pressure cleaner to clean the oven exterior since it
may damage parts of the oven including electronic components.

Cleaning Behind the Filter Housing

You have to remove the filter housing to be able to clean around the fan and the heating
elements.

1. Loosen screws (A) and (B).

2. Turn the filter housing and clean behind it. You dismount the filter housing by lifting
it upwards until it is clear of the pin at the bottom and then tipping it.

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 Cleaning

Cleaning the Jet Heads

You have to clean the jet heads regularly, when you have used CombiSmart and
ClimaOptima. This must also be cleaned regularly. The Visual Cooking oven comes with two
sets of jet heads. While you clean one set, you can replace them with the other.

1. Unlock the screws to dismount the jet heads.

2. Soak the jet heads in descaling solution overnight.

•• The jet head for steam (ClimaOptima and CombiSmart) has the notch facing
downwards (long tube).
•• The jet head for CombiWash is located to the right or above the other jet head.
It has the notch facing upwards (short tube).

Jet head
for steam

Jet head for

CombiWash

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 Cleaning

Cleaning the Filter

The filter is located below the control compartment in front of the spray hose.

You have to unscrew and clean the filter under the front panel on a weekly basis. You can
clean the filter manually or in a dishwasher.

Important: If the filter is not cleaned, the computer may overheat and the oven will fail. You
must remount the filter after it has been cleaned.

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 ERROR CODES

ERROR CODES
ERROR CODE DESCRIPTION

3 Generator too hot.

4 Oven too hot.
5 Fan too hot.
6 Drain too hot.
7 Oven sensor defective.
8 Core probe not connected.
9 Generator Sensor defect.
10 Drain sensor defective.
11 Water shortage.
12 SSR to hot.
13 Generator too hot.
14a Fan to slow.
14b Fan to slow.
16 I/O board to hot.
19 Internal error.
20 No communication.
21 Invalid recipe.
22 Program terminated.
23 Oven too hot.
24 Empty error.
25 ClimaOptima not calibrated.
26 ClimaOptima sensor.
27 ClimaOptima Calibration error.
28 Error in alarm.
29 Door sensor error.
34 Water pressure too low.
36 No detergent.
37 Cooldown error.
38 Detergent in oven.
39 Insufficient memory.
40 I/O board too hot.

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 ERROR CODES

ERROR CODES
ERROR CODE DESCRIPTION

41 Main Alarm.
44 Exhaust error.
45 Error with 24V.
46 Clima optima.
50 Press switch active.
51 Press switch off.
52 Gas valve failure.
53 Gas fan no rpm.
54 Gas fan speed error.
55 Ignition error.
56 Gas error.
57 Gas stop.
60 Press switch activ 2.
61 Press switch activ 2.
62 gas valve failure 2.
63 Gas fan no rpm 2.
64 Gas fan speed error 2.
65 Ignition error.
66 Gas error 2.
67 Gas stop 2.
68 Deliming needed.
69 Deliming soon needed.
70 Delime flush needed.
71 Core probe warning.
80 Forced wash soon needed .
81 Forced wash needed.
82 Filter change soon needed.
83 Filter change needed.
84 User ignored filter change.
85 User ignored filter change.

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 Troubleshooting ERROR CODES

TROUBLESHOOTING
ERROR CODES
Troubleshooting procedure step by step on error codes.

If the oven displays an error code, try the solutions below before contacting HOUNÖ
technical service.

After each step is carried out, be sure to test if the oven is working again.

Error Code 3

The generator thermo switch has tripped because the temperature has risen above
135°C/275°F. Press the Q2 button under the oven to reconnect.

Steps Check list Solution

1 Go to the test menu (main alarm) to see if

the thermo switch has tripped. Reset the
switch.

2 Test if the solenoid valve, level sensor, If no, ensure that there is no
empty pump, and the solid stat relay are dirt in the solenoid valve.
working properly.

3 Check the cable and the cable plugs

4 - Change the overheating

sensor.

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 Troubleshooting ERROR CODES

Error Code 4

The overheating switch of the oven chamber is off because the oven chamber temper-
ature has risen above 350°C/662°F. Press the Q1 button at the bottom of the oven to
reset the switch. If the oven comes with to fan motors, there are 2 overheating switches.

Steps Check list Solution

1 Go to the test menu (main alarm) to see

if the overheating thermo switch has
tripped. Reset the switch.

2 Test whether the fan is running and

whether the solid state relay is working
properly.

3 Check the cable and the cable plugs.

4 - Change the overheating

sensor.

Error Code 5

The fan motor is too hot (above 120°C/248°F). Let the motor cool off for about 20-30
minutes and then try turning it on again.

Steps Check list Solution

1 Go to the test menu (main alarm) to see

which information is displayed.

2 Check the cable and the cable plugs.

3 Check the door sensor since 5VDC may

affect the overheating circuit.

4 Check the fan motor windings. Change the fan motor.

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 ERROR CODES

Error Code 6

The drain temperature has been above 75°C/167°F for more than 5 minutes. It is
normally kept below 60°C/140°F.

Steps Check list Solution

1 Check that the water is turned on.

2 Check that the water supply connected to

the oven is cold and not hot.

3 Check whether the temperature sensor If broken, change the sensor.

is broken. (Measure the real temperature
and compare it to the temperature
measured by the test function.)

4 Clean the jet and the solenoid valve at the Change the computer.
drain, and then check the temperature
again.

Error Code 7

The temperature sensor in the oven chamber is broken. The oven cannot be used until
the error has been corrected.

Steps Check list Solution

1 Go to the test menu (oven) to see which

temperature is displayed.

2 Check the cable and the cable plugs and

change the plug if necessary.

3 Test the sensor using an ohmmeter, If no, change the sensor.

and check whether the value matches
the value in the table and the current
temperature.

4 - Change the computer.

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 ERROR CODES

Error Code 8

The probe is broken or is not connected properly. The program cannot be used until the
error has been corrected.

Steps Check list Solution

1 Go to the test menu (miscellaneous) to

see which information is displayed.

2 Check the cable and the cable plugs and

change the plug if necessary.

3 Test the sensor using an ohmmeter, If no, change the sensor.

and check whether the value matches
the value in the table and the current
temperature.

4 - Change the computer.

Error Code 9

The temperature sensor in the boiler/steam generator is not working properly.

Programs using the steam cannot be used until the error has been corrected.

Steps Check list Solution

1 Go to the test menu (steam generator) to

see which information is displayed.

2 Check the cable and the cable plugs and

change the plug if necessary.

3 Test the sensor using an ohmmeter, If no, change the sensor.

and check whether the value matches
the value in the table and the current
temperature.

4 - Change the computer.

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 ERROR CODES

Error Code 10

The temperature sensor in the drain is broken. The oven can still be used, but the error
has to be corrected as soon as possible.

Steps Check list Solution

1 Go to the test menu (oven) to see which

temperature is displayed.

2 Check the cable and the cable plugs and

change the plug if necessary.

3 Test the sensor using an ohmmeter, If no, change the sensor.

and check whether the value matches
the value in the table and the current
temperature.

4 - Change the computer.

Error Code 11

There’s not enough water. The steam generator was not filled to high level water within 2
minutes.

Steps Check list Solution

1 Go to the test menu (steam generator) to

see if the water level is correct. Adjust the
water level if necessary. Check that water is
turned on. The water pressure should be at
least 2 bars.

2 Test whether the solenoid valve and Clean the solenoid valve.
the level sensor are working (is 24VAC
measured at the coil when the fill valve is
activated?)

3 - Change the computer.

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 ERROR CODES

Error Code 12

The heat sink for the solid state relay is too hot because the temperature has risen
above 120°C/248°F. Let it cool off for 20-30 minutes and then retry.

Steps Check list Solution

1 Go to the test menu (Main Alarm) to see

which information is displayed.

2 Check the cable and the cable plugs, and

then tighten the solid state relay.

3 - Clean the intake filter.

4 - Change the overheating

sensor.

5 - Change the computer.

Error Code 13

The temperature of the top heating element of the steam generator has risen above
130°C/266°F.

Steps Check list Solution

1 Go to the test menu (steam generator) The steam generator may

to see which information the computer have to be descaled.
displays.

2 Check the cable and the cable plugs. Change the plug if necessary.

3 Test the sensor using an ohmmeter, and If no, change the sensor.
check whether the value matches the
value in the table.

4 - Change the computer.

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 ERROR CODES

1)
Error Code 14a + 14B

The rotational speed of the fan is too slow. (a=lower fan B=upper fan)

Steps Check list Solution

1 Verify that the intake filter is not blocked. Clean if necessary.

2 Go to the test menu and test if the fan

motor is running.

3 Check that the fan wheel is not blocked.

4)
4 Check that the main contactor can be If 24VAC is measured, but
activated. the main contactor is not
(Activate the main contactor in the activated, change the main
fan test menu. Verify that there is contactor.
24VAC between A1 and A2 on the main
contactor.)
5)
5 Verify that the frequency inverter receives
230VAC on L/R and N/S.

6 Is the red LED in the frequency inverter Change the frequency

6) flashing? inverter.
Find out how often and check the meaning (Contact HOUNÖ service)
of the flashes.

7 Verify that the rotation sensor measures If you can measure 5VDC, but
5VDC. (Measure 5VDC between the black there is no signal from the
and the red cable on the rotation sensor.) sensor, change the sensor.

8 Verify that the 5VDC diode on the IO board

8)
lights up.

9 Disconnect the J1 plug. If the 5VDC diode

emits light, there is a short circuit in the
wiring.

10 Does the diode does not light up? Change the IO board.

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 ERROR CODES

Error Code 15

The CPU board temperature has risen above 60°C/140°F.

Steps Check list Solution

1 Go to the test menu to see which infor-

mation the computer displays.

2 Check whether the ambient temperature is Move the oven if necessary,

too high. and clean the intake filter.

3 Check whether the test function tempe- Move the oven or the heat
rature matches the current temperature. source.

5 - Change the computer.

Error Code 16

The IO board temperature has risen above 60°C/140°F.

Steps Check list Solution

1 Go to the test menu to see which infor-

mation the computer displays.

2 Check whether the ambient temperature is Move the oven if necessary,

too high. and clean the intake filter.

3 Check whether the test function tempe- Move the oven or the heat
rature matches the current temperature. source.

5 - Change the computer.

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 ERROR CODES

Error Code 19

An internal error occurred. The oven server process is not responding. Oven server
process failed.

Steps Check list Solution

1 - Restart the oven.

2 - Change the computer.

Error Code 20

An internal error occurred. A communication failure occurred between the computer

and the IO board. The IO board software is not responding. Wrong software version on
the IO board.

Steps Check list Solution

1 Check the wire connection between the IO Change the IO board or the
board and the CPU board. CPU board if necessary.

Error Code 21

Invalid program. The program you have chosen is not supported by the oven.

Steps Check list Solution

1 Go to the USB key function. Download the program

combination that matches
this oven type.

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 ERROR CODES

Error Code 22

Program interrupted. There was a power outage while the program was running. The
power outage lasted for so long that the program cannot be restarted.

Steps Check list Solution

1 - The oven can be set up to

restart after a power outage.
Contact service personnel.

Error Code 23

The oven is too hot for CombiWash to start.

Steps Check list Solution

1 Cool down the oven and restart

CombiWash

2 Go to the test menu to see which infor-

mation the computer displays.

3 Check that the temperature in the oven Cool down the oven and
chamber matches the temperature that is restart CombiWash.
displayed.

4 Test the temperature sensor using an Change the sensor.

ohmmeter, and check whether the value
matches the value in the table.

5 - Change the computer.

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 ERROR CODES

Error Code 24

Empty error. The steam generator could not be emptied during flushing. The level
sensor reports high water level when the generator is emptied. Drain maybe blocked.

Steps Check list Solution

1 Go to the test menu and activate the If pump is running find the
boiler empty pump. block in the drain tubes

2 If pump is not running, meassure that the

pump receives 230V.

3 Pump is receiving 230V and pump is trying Check that there is no scaile
to rotate but it is stuck or foreign objects blocking
the empty pump. Remove
scale or foreign ombject from
empty pump.

4 Use the test menu to check if the signal Clean and descale the level
from the water level sensor reads the sensor, and test it using the
empty and full signal. test menu, and then check
if the generator can be
emptied now.

5 - Change the computer.

Error Code 25

The ClimaOptima function has not been calibrated.

Steps Check list Solution

1 Go to the service menu to calibrate. Restart the calibration

process. The oven must be
cold.

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 ERROR CODES

Error Code 26

The ClimaOptima sensor signal out of range.

Steps Check list Solution

1 Go to the test menu (fan test) and check

that the signal from the pressure sensor
variates accordingly to the fan speed.

2 Check the cable and the cable plugs. change the plug if necessary,
and then test if the sensor is
working.

3 If voltage and wires are ok Replace the I/O board.

4 Change the computer.

Error Code 27

ClimaOptima calibration could not be completed. A step took too long.

Steps Check list Solution

2 Go to test menu and check that the steam Restart the calibration
injection nozzle and the solenoid valve process. The oven must be
for the injection steam function is working cold.
properly.

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 ERROR CODES

Error Code 28

An invalid combination of the mains alarm has been detected. The mains alarm is not
displayed correctly.

Steps Check list Solution

1 Go to the test menu (alarm test) to see

which one of the over heat safety switches
is not sending a feedbak signal to the I/O
board conector J14.

2 Check the switch and cable and the cable Change the plug and repair
plugs from that specific overheating the wire if necessary, and
sensor and the wire to J14. then test if the alarm have
disappeared.

3 If the error persist, and the feedback Replace the I/O board.
signal to the I/O board is ok.

Error Code 29

The door sensor is not working properly. Note the oven does not stop working when the
door is opened. The oven can be used.

Steps Check list Solution

1 Go to the test menu to see which infor-

mation the computer displays.

2 Check the cable and the cable plugs, and

the test if the sensor is working.

3 Check the magnet on the drip slide. Change the drip slide.

4 - If the magnet works, change

the door sensor, and
remember to calibrate the
door afterwards.

WARNING
The oven does not stop working when the door is opened.
The oven can still be used with caution

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 ERROR CODES

Error Code 34

The water pressure is too low. (les then 1,5 bar)

Steps Check list Solution

1 Pull a wire one of the water pressure switch If YES: replace the sensor.
to check if the signal changes to YES

1 Check that the water is turned on. Clean the solenoid valve filter.

2 Check that the water pressure is at least

2.5 bars.

Error Code 36

CombiWash was interrupted while there was still detergent in the oven chamber.

Steps Check list Solution

1 - Run CombiWash step 0

before using the oven.

Error Code 37

Cooldown error. oven is to hot to run a washing program.

Steps Check list Solution

1 Cool down the oven and restart the -

washing program

Error Code 38

CombiWash was interrupted while there was still detergent in the oven chamber.

Steps Check list Solution

1 - Run CombiWash step 0

before using the oven.

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 ERROR CODES

Error Code 39

There is insufficient memory to run the selected operation.

Steps Check list Solution

1 - If possible, delete some

HACCP files.

Error Code 40

The IO board temperature has been too high. Note that this is a warning. If the temper-
ature continues to rise, the oven will stop and display error code 16.

Steps Check list Solution

1 Clean the filter at the bottom of the panel Clean the filter at the bottom
and check that the cooling fan behind the of the panel.
front panel is running.

2 Check that the cooling fan behinde the Replace coolingfan if

front panel is running. neccessary.

Error Code 41

Main Alarm. Boiler overheating safety switch was tripped, in a function mode that does
not use the boiler

Steps Check list Solution

1 Check if the overheat safety switch have Reset the overheat safety
been tripped. switch.

2 Check the jumper on wires

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 ERROR CODES

Error Code 44

Exhaust error. At every start up the CPU makes the valve run a reference round.

Steps Check list Solution

1 Use the technicians test menu, oven test.

Test if the exhaust valve works and the
switch send a signal back to the CPU.

2 If the motor is rotating the valve but there If exhaust signal changes in
is no on/off signal from the switch. Bridge the test menu. replace the
the two wires on the exhaust motor switch. complete exhaust walve.

3 If the motor is not running, check that 24V is present, replace the
there is a 24V power supply for motor. motor.

4 If there is no 24V power supply for the Repair the damaged wire.
motor. Meassure the wires from the I/O
bord to the connector for the valve motor.

5 Measure the 24V pover supply directly on If the 24V is missing replace
the I/O. the I/O board.

Error Code 45

There is no 24VAC. Main contactor output is not working.

Steps Check list Solution

1 Check fuse F1. Replace fuse F1.

2 Measure the 24V on I/O board conector J1 if not repair the wires.
wire pin no 1-3-5)

2 Check the led F1 24V on the I/O board

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 ERROR CODES

Error Code 46

ClimaOptima sensor signal to high.

Steps Check list Solution

1 Replace climaotima
sensor, and recalibrate the
ClimaOptima function.

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 ERROR CODES

Gas Error Codes

Error codes from number 50 to 67 are gas oven specific.

Error 50/60

Pressure switch error. The pressure switch is active at start (timeout 20 sec.)

Steps Check list Solution

1 Go to the test menu, and adjust the Change the pressure switch.
pressure switch. (See Appendix D:
Touch controller “XPE” – Set-up and
Adjustment on page 82).
Verify that it the pressure switch is working
properly.

Error 51/61

Pressure switch error. The pressure switch is not active when the gas fan is running.

Steps Check list Solution

1 Go to test function.
Check that the relay K16 is working
properly.

2 Adjust the pressure switch. Change the pressure switch.

(See Appendix D:
Touch controller “XPE” – Set-up and
Adjustment on page 82).
Verify that it the pressure switch is working
properly.

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 ERROR CODES

Error 52/62

Gas valve failure. The gas valve does not open after 5 startup attempts
(timeout 20 sec.)

Steps Check list Solution

1 Go to the test menu. Perform the startup

sequence.

2 Check that the controller receives If there is no feedback,

feedback from the pressure switch and the perform the startup
gas valve. sequence again.

3 Check that the relays are working properly. Change the relays.

4 Check the Dungs control box.

(See Appendix I:
Identifying Gas-air Units and Coil on page
89)

Error 53/63

Fan RPM. The pressure switch is active at start (timeout 20 sec.)

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 ERROR CODES

Error 54/64

Fan error. The gas fan RPM before ignition is not correct.

Steps Check list Solution

1 Go to the test menu. Test the gas fan. If no, test the gas fan. Verify
Verify that the RPMs are registered. that there is power input.

2 Test the gas fan: Set the speed at 2000 Remove the low voltage plugs
RPM and verify that the actual RPM from the IO board J18, J19 and
reaches 2000 RPM. J20. The fan should run at full
speed. If no RPMs are regis-
tered, change the gas fan.

3 Verify that the main contactor is activated. Ensure that the main
contactor is activated, and
then go to the test menu and
test the fan again.

4 Check the fuses and the wires.

Error 55/65

Ignition failure. Warning only: did not ignite at first try.

Steps Check list Solution

1 Check, clean, or change the electrode or

burner.

2 Go to test menu.
Perform the start-up sequence.

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 ERROR CODES

Error 56/66

Gas failure. No flame has been detected after 5 attempts.

Steps Check list Solution

1 Check if gas supply is available.

2 Check, clean, or change the electrode or

burner.

3 Go to the test function.

Perform the startup sequence.

Error 57/67

STOP during operation. Warning only: gas stop during operation.

Steps Check list Solution

1 Check, clean, or change the electrode or

burner.

2 Go to the test function.

Perform the startup sequence.

Error 68

Deliming needed

Steps Check list Solution

1 The timer for the steam generator have Run the deliming program to
reached the preset limit 30/60/90 houers descal the steam generator

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 ERROR CODES

Error 69

Deliming needed soon

Steps Check list Solution

1 The timer for the steam generator is Prepar to run the deliming
aproching the preset limit 30/60/90 program to descal the steam
houers generator

Error 70

Deliming flush needed

Steps Check list Solution

1 There are chemicals/recidues left in the Run the flushing program for
steam generator. the steam generator

Error 71

Core probe warrning

Steps Check list Solution

1 Go to technician test menu and check if one is showing a different

the feedback values from the three pt100 value then the rest, replace
sensors in the core probe core probe.

2 Meassure the wires from I/O board J1 to Wire is disconnected, replace

the connectors for the core probe or repair disconnected wire.

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 ERROR CODES

Error 80

Force wash soon needed

Steps Check list Solution

1 Interval: 30 h : warning after 24 h Wash the oven. us one of the

Interval: 40 h: warning after 32 h washing programs soon.

Error 81

Force wash needed

Steps Check list Solution

1 Oven has reached the forced wash limit. Oven cannot be used again,
before the oven has run one
of the 1-4 washing programs.

Error 82

Filter change soon needed.

Steps Check list Solution

1 The filter capacity has soon reached its Replace filter soon. before
capacity limit. the capacity limit is reached.

Error 83

Filter change needed.

Steps Check list Solution

1 The filter capacity has reached its Replace filter.

capacity limit.

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 ERROR CODES

Error 84

User ignored filter change.

Steps Check list Solution

1 User has ignored to change the Hydro Change the Hydro Shield
Shield water filter. water filter.

Neglect to change the Hydro Shield water filter will jeopardize the warranty

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 Appendix A: Burner Electrode Adjustments

APPENDIX A:
BURNER ELECTRODE
ADJUSTMENTS
Oven size 1.06

13kW

8 mm

4 mm

73 mm

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 Appendix A: Burner Electrode Adjustments

Oven size 1.10, 1.20, 2.10, 2.20

21 kW, 42kW, 24kW, 48kW

8 mm

4 mm

78 mm

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 Appendix B: Measuring Gas Pressure

APPENDIX B:
MEASURING GAS
PRESSURE
1. Prepare gas-pressure meter.

2. Open the gas-test nipple using a flat-headed screwdriver.

3. Turn the screw counter-clockwise.

When the gas-test nipple is opened, gas will escape. Be prepared and
have the gas-pressure meter ready before opening the test nipple.

4. Measure static the gas pressure.

5. Switch on unit and measure the dynamic gas pressure. The dynamic gas pressure
must be between the following values

•• “1.8-2.5 kPa” - “18 - 25 mbar” for natural gas.

•• “3-5.7 kPa” – “30 - 57 mbar” for LPG.

6. Note: Local regulations might state otherwise. Please comply with local rules and
regulations.

7. Close the gas-test nipple using a flat-headed screwdriver.

8. Turn the screw clockwise.

Check all gas lines for gas leakages using an appropriate leakage tester.

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 Appendix C: Gas Burner Settings

APPENDIX C:
GAS BURNER SETTINGS
When you adjust the gas burner, the tolerances are as follows:
Max. rpm setting: ±0.2%
Min. rpm setting: +/-0.2%

Adjustment “CE” gas ovens (burner 1)

Houno Gas Oven Adjustment Settings Convection Burner 1 “Bottom”

O2%, CO2% O2%, CO2% RPM Adjustement Air Proving

“MAX” RPM “MIN”, RPM normal operation Switch - ON
Heat
Ovn Gas inlet “u16” “u16” “u16”
Type of Gas Power Types Pressure O2% CO2% RPM kW O2% CO2% RPM Min Start Max OFF -> ON
kW

13 kW 1.06/5 18-25 mbar 4,1% 9,4% 6700 13 kW 4,6% 9,1% 4800 4800 4800 6700 3100 ±100
21 kW 1.10/8 18-25 mbar 4,3% 9,3% 6300 21 kW 4,1% 9,4% 2700 2700 3900 6300 2300 ±100
Nature Gas 42 kW 1.20/15 18-25 mbar 4,3% 9,3% 6300 21 kW 4,1% 9,4% 2700 2700 3900 6300 2300 ±100
(G20) 21 kW 2.06 18-25 mbar 4,1% 9,4% 6200 21 kW 4,1% 9,4% 3800 3800 3900 6200 2800 ±100
24 kW 2.10 18-25 mbar 4,1% 9,4% 6600 24 kW 4,5% 9,2% 2800 2800 3600 6600 2300 ±100
48 kW 2.20 18-25 mbar 4,1% 9,4% 6600 24 kW 4,5% 9,2% 2800 2800 3600 6600 2300 ±100

13 kW 1.06/5 18-25 mbar 4,0% 9,3% 6800 13 kW 4,3% 9,1% 4800 4800 4800 6800 3100 ±100
21 kW 1.10/8 18-25 mbar 4,0% 9,3% 6400 21 kW 4,0% 9,3% 2800 2800 3900 6400 2300 ±100
Nature Gas 42 kW 1.20/15 18-25 mbar 4,0% 9,3% 6400 21 kW 4,0% 9,3% 2800 2800 3900 6400 2300 ±100
(G25) 21 kW 2.06 18-25 mbar 3,8% 9,4% 6200 21 kW 3,8% 9,4% 3800 3800 3900 6200 2800 ±100
24 kW 2.10 18-25 mbar 3,8% 9,4% 6600 24 kW 4,1% 9,2% 2800 2800 3600 6600 2300 ±100
48 kW 2.20 18-25 mbar 3,8% 9,4% 6600 24 kW 4,1% 9,2% 2800 2800 3600 6600 2300 ±100

13 kW 1.06/5 28-57 mbar 4,5% 11,0% 6500 13 kW 5,1% 10,6% 4800 4800 4800 6500 3100 ±100
21 kW 1.10/8 28-57 mbar 4,5% 11,0% 6000 21 kW 4,5% 11,0% 2600 2600 4300 6000 2300 ±100
LPG 3BP 42 kW 1.20/15 28-57 mbar 4,5% 11,0% 6000 21 kW 4,5% 11,0% 2600 2600 4300 6000 2300 ±100
(G30/G31) 21 kW 2.06 28-57 mbar 4,5% 11,0% 6200 21 kW 4,5% 11,0% 3800 3800 3900 6200 2800 ±100
24 kW 2.10 28-57 mbar 4,0% 11,4% 6200 24 kW 4,7% 10,9% 2800 2800 3600 6200 2300 ±100
48 kW 2.20 28-57 mbar 4,0% 11,4% 6200 24 kW 4,7% 10,9% 2800 2800 3600 6200 2300 ±100

13 kW 1.06/5 30-50 mbar 5,2% 10,3% 6800 13 kW 5,2% 10,3% 4800 4800 4800 6800 3100 ±100
21 kW 1.10/8 30-50 mbar 5,4% 10,2% 6300 21 kW 5,4% 10,2% 3900 3000 3900 6300 2300 ±100
LPG 3P 42 kW 1.20/15 30-50 mbar 5,4% 10,2% 6300 21 kW 5,4% 10,2% 3900 3000 3900 6300 2300 ±100
(G31) 21 kW 2.06 30-50 mbar 5,4% 10,2% 6400 21 kW 5,4% 10,2% 3800 3800 3900 6400 2800 ±100
24 kW 2.10 30-50 mbar 5,1% 10,4% 6600 24 kW 5,8% 9,9% 2900 2900 3600 6600 2300 ±100
48 kW 2.20 30-50 mbar 5,1% 10,4% 6600 24 kW 5,8% 9,9% 2900 2900 3600 6600 2300 ±100

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 Appendix C: Gas Burner Settings

Adjustment “ETL” gas ovens (burner 1)

Houno Gas Oven Adjustment Settings Convection Burner 1 “Bottom”
O2%, CO2% O2%, CO2% RPM Adjustement Air Proving
“MAX” RPM “MIN”, RPM normal operation Switch - ON
Heat
Ovn Gas inlet “u16” “u16” “u16”
Type of Gas Power O2% CO2% RPM BTU/hr O2% CO2% RPM OFF -> ON
Types Pressure Min Start Max
BTU/hr

58000 1.06/5 3,2-8,0 inH2O 4,1% 9,4% 6700 58000 4,6% 9,1% 4800 4800 4800 6700 3100 ±100
87000 1.10/8 3,2-8,0 inH2O 4,3% 9,3% 6300 87000 4,1% 9,4% 2700 2700 3900 6300 2300 ±100
NAT 174000 1.20/15 3,2-8,0 inH2O 4,3% 9,3% 6300 87000 4,1% 9,4% 2700 2700 3900 6300 2300 ±100
(G20) 81800 2.06 3,2-8,0 inH2O 4,1% 9,4% 6200 81800 4,1% 9,4% 3800 3800 3900 6200 2800 ±100
95500 2.10 3,2-8,0 inH2O 4,1% 9,4% 6600 95500 4,5% 9,2% 2800 2800 3600 6600 2300 ±100
190000 2.20 3,2-8,0 inH2O 4,1% 9,4% 6600 95500 4,5% 9,2% 2800 2800 3600 6600 2300 ±100

60000 1.06/5 5,2-14 inH2O 5,2% 10,3% 6800 60000 5,2% 10,3% 4800 4800 4800 6800 3100 ±100
87000 1.10/8 5,2-14 inH2O 5,4% 10,2% 6300 87000 5,4% 10,2% 3900 3000 3900 6300 2300 ±100
LP 174000 1.20/15 5,2-14 inH2O 5,4% 10,2% 6300 87000 5,4% 10,2% 3900 3000 3900 6300 2300 ±100
(G31) 81800 2.06 5,2-14 inH2O 5,4% 10,2% 6400 81800 5,4% 10,2% 3800 3800 3900 6400 2800 ±100
95500 2.10 5,2-14 inH2O 5,1% 10,4% 6600 95500 5,8% 9,9% 2900 2900 3600 6600 2300 ±100
190000 2.20 5,2-14 inH2O 5,1% 10,4% 6600 95500 5,8% 9,9% 2900 2900 3600 6600 2300 ±100

Adjustment “CE” gas ovens (burner 2)

Houno Gas Oven Adjustment Settings Convection Burner 2 “Top”
O2%, CO2% O2%, CO2% RPM Adjustement Air Proving
“MAX” RPM “MIN”, RPM normal operation Switch - ON
Heat
Type of Gas Power Ovn Gas inlet O2% CO2% RPM kW O2% CO2% RPM “u17” “u17” “u17” OFF -> ON
Types Pressure Min Start Max
kW

13 kW 1.06/5 18-25 mbar

21 kW 1.10/8 18-25 mbar
Nature Gas 42 kW 1.20/15 18-25 mbar 4,3% 9,3% 6300 21 kW 4,1% 9,4% 2700 2700 3900 6300 2300 ±100
(G20) 21 kW 2.06 18-25 mbar
24 kW 2.10 18-25 mbar
48 kW 2.20 18-25 mbar 4,1% 9,4% 6600 24 kW 4,5% 9,2% 2800 2800 3600 6600 2300 ±100

13 kW 1.06/5 18-25 mbar

21 kW 1.10/8 18-25 mbar
Nature Gas 42 kW 1.20/15 18-25 mbar 4,00% 9,3% 6400 21 kW 4,00% 9,3% 3900 2800 3900 6400 2300 ±100
(G25) 21 kW 2.06 18-25 mbar
24 kW 2.10 18-25 mbar
48 kW 2.20 18-25 mbar 3,80% 9,40% 6600 24 kW 4,10% 9,20% 2800 2800 3600 6600 2300 ±100

13 kW 1.06/5 28-57 mbar

21 kW 1.10/8 28-57 mbar
LPG 3BP 42 kW 1.20/15 28-57 mbar 4,5% 11,0% 6000 21 kW 4,5% 11,0% 2600 2600 4300 6000 2300 ±100
(G30/G31) 21 kW 2.06 28-57 mbar
24 kW 2.10 28-57 mbar
48 kW 2.20 28-57 mbar 4,0% 11,4% 6200 24 kW 4,7% 10,9% 2800 2800 3600 6200 2300 ±100

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 Appendix C: Gas Burner Settings

Adjustment “ETL” gas ovens (burner 2)

Houno Gas Oven Adjustment Settings Convection Burner 2 “Top”
O2%, CO2% O2%, CO2% RPM Adjustement Air Proving
“MAX” RPM “MIN”, RPM normal operation Switch - ON
Heat
Ovn Gas inlet “u17” “u17” “u17”
Type of Gas Power Types Pressure O2% CO2% RPM BTU/hr O2% CO2% RPM Min Start Max OFF -> ON
BTU/hr

58000 1.06/5 3,2-8,0 inH2O

87000 1.10/8 3,2-8,0 inH2O
NAT 174000 1.20/15 3,2-8,0 inH2O 4,3% 9,3% 6300 87000 4,1% 9,4% 2700 2700 3900 6300 2300 ±100
(G20) 81800 2.06 3,2-8,0 inH2O
95500 2.10 3,2-8,0 inH2O
190000 2.20 3,2-8,0 inH2O 4,1% 9,4% 6600 95500 4,5% 9,2% 2800 2800 3600 6600 2300 ±100

60000 1.06/5 5,2-14 inH2O

87000 1.10/8 5,2-14 inH2O
LP 174000 1.20/15 5,2-14 inH2O 5,4% 10,2% 6300 87000 5,4% 10,2% 3900 3000 3900 6300 2300 ±100
(G31) 81800 2.06 5,2-14 inH2O
95500 2.10 5,2-14 inH2O
190000 2.20 5,2-14 inH2O 5,1% 10,4% 6600 95500 5,8% 9,9% 2900 2900 3600 6600 2300 ±100

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 Appendix D: Touch controller “XPE” – Set-up and Adjustment

APPENDIX D:
TOUCH CONTROLLER
“XPE” – SET-UP AND
ADJUSTMENT

Converting A Gas Oven to Another Gas

Type
When you convert to another gas type, never adjust the offset governor “Minimum”.

1. Make the following adjustment on the “Max rpm” screw

•• From G20 --> G25, 1 turn counter-clockwise.

•• From G20 --> LGP, 2 turns clockwise
•• From G25 --> G20, 1 turn clockwise.
•• From G25 --> LGP, 3 turns clockwise.
•• From LPG --> G20, 2 turns counter-clockwise.
•• From LPG --> G25, 3 turns counter-clockwise.

2. Set up the controller for the new gas type.

3. Verify or change if necessary the preset rpm in the controller.

4. Perform flue gas analysis or adjustments. For more information, see the installation
manual.

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 Appendix E: Gas Pressure-switch Adjustment

APPENDIX E:
GAS PRESSURE-
SWITCH ADJUSTMENT
1. Turn off the gas inlet.

If the gas to the oven is not turned off before the pressure switch is
adjusted, the oven may ignite during the adjusting process creating high
CO values. This can cause fatal poisoning.

2. On the Technician menu, touch Test functions, and then touch Gas.

3. Touch Main contactor, and then touch the Fan button next to the Main contactor
button.

4. Touch RPM, and then select 1000 RPM.

5. Touch Gas Control, and then wait for 10 seconds.

6. Touch the Fan button next to Pres. Switch.

7. Touch the RPM button and slowly increase the RPM. Register at which Actual RPM
value, the pressure switch turns ON.

8. The Actual RPM value must match the values in the following table. If the value
does not match, you must adjust the pressure switch.

SERVICE MANUAL 83
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 Appendix
APPENDIX E: E:
GASGas Pressure-switch
PRESSURE-SWITCH Adjustment
ADJUSTMENT

Pressure-switch table OFF->ON

Oven types RPM Tolerance

1.06 3100 ±100

1.10 2300 ±100

1.20 2300 ±100

2.06 2800 ±100

2.10 2300 ±100

2.20 2300 ±100

9. If the registered value is lower than the value in the table, you have to adjust
thepressure switch clockwise. ½ turn adjusts approximately 150 RPM.

10. If the registered value is higher than the value in the table, you have to adjust
thepressure switch counter-clockwise. ½ turn adjusts approximately 150 RPM.

11. When you have completed the adjustment, turn the controller OFF and ON.

12. Turn on the gas inlet.

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 Appendix F: Gas Sequence Diagram

APPENDIX F:
GAS SEQUENCE
DIAGRAM

SERVICE MANUAL 85
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 Appendix G: Gas Components Position

APPENDIX G:
GAS COMPONENTS
POSITION
Gas components position 1.06, 1.10, 2.10, 2.14

Interface relay

Coil gas-air unit

Burner
electrode

Ignition trafo

Gas-air unit

Dungs
Pressure switch
control box

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 Appendix G: Gas Components Position

Gas component position 1.20, 2.20

Pressure switch

Interface relay

Coil gas-air unit

Burner
electrode

Ignition trafo

Gas-air unit
Dungs
control box
Interface relay

Coil gas-air unit

Burner
electrode

Ignition trafo

Gas-air unit

Pressure switch

SERVICE MANUAL 87
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 Appendix H: Gas Components

APPENDIX H:
GAS COMPONENTS
Gas-Air unit Coil gas-air unit Cable coil

kW Black 9kW White 18kW Red 27kW

Voltage 230VAC 120VAC 230VAC 120VAC 230VAC 120VAC 230VAC 120VAC 230VAC 120VAC

Part no. 32700180 32700177 32700181 32700178 32700182 32700179 32700170 32700173 32700169 32700174

1.06 x x x

1.10 x x x

1.20 x x x
120VAC

2.06

2.14/2.10 x x x

2.20 x x x

1.06 x x x

1.10 x x x

1.20 x x x
230VAC

2.06

2.14/2.10 x x x

2.20 x x x

Burner w. electrode Electrode Ignition trafo Cable ignition trafo Dungs control box

kW 9kW 18/27kW 9kW 18/27kW

Voltage 230VAC 120VAC 230VAC 120VAC 230VAC 120VAC

Part no. 32720022 32720021 32700126 32700055 32700166 32700172 32800073 32800073 32700165 32700171

1.06 x x x x x

1.10 x x x x x

1.20 x x x x x
120VAC

2.06

2.14/2.10 x x x x x

2.20 x x x x x

1.06 x x x x x

1.10 x x x x x

1.20 x x x x x
230VAC

2.06

2.14/2.10 x x x x x

2.20 x x x x x

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 Appendix I: Identifying Gas-air Units and Coil

APPENDIX I:
IDENTIFYING GAS-AIR
UNITS AND COIL

13 kW - Black

21-24 kW – Red

Yellow: 120VAC - Coil

Red: 230VAC – Coil

SERVICE MANUAL 89
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 Appendix J: Error codes on Dungs’ Control Box

APPENDIX J:
ERROR CODES ON
DUNGS’ CONTROL BOX

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 Appendix J: Error codes on Dungs’ Control Box

SERVICE MANUAL 91
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 Appendix J: Error codes on Dungs’ Control Box

92 SERVICE MANUAL
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 Appendix J: Error codes on Dungs’ Control Box

SERVICE MANUAL 93
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 SERVICE AND REPAIR

SERVICE AND REPAIR

• All maintenance and repair must be carried out by qualified installation
and service personnel only. Installation or service by other than qualified
personnel may result in damage to the oven and/or injury to the operator.

• When cleaning the oven, only use cleaning detergent that matches the
specifications from the factory. Do not use corrosive cleaners not inten-
ded for oven cleaning on your Visual Cooking oven.

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 Safety

SAFETY
Please read the safety instructions carefully.

•• Ensure that installation is carried out by qualified installation and service personnel
only.
•• Read, understand, and follow the instructions for use.
•• Place trays filled with hot liquid at the bottom runners of the oven chamber and
practice extreme caution when removing the tray from the oven chamber.
•• Do not store petrol or other flammable vapors or liquids in the vicinity of this
appliance.
•• Do not touch hot surfaces. The temperature of some surfaces may exceed
60°C/140°F or more.
•• Do not attempt to operate or open the oven during the automatic cleansing
process.
•• Use the parking brakes on the trolley wheels to prevent trolleys from rolling on
uneven floors.
•• Contact qualified service personnel before you make changes to the set-up of the
oven. Incorrect changes may have serious effects on its reliability in service.

SERVICE MANUAL 95
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 HOUNÖ A/S
ALSVEJ 1
DK-8940 RANDERS SV
DENMARK

T: +45 8711 4711

E: houno@houno.com

www.houno.us

PART OF

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