HOUNÖ
SERVICE MANUAL - English
CombiSlim C Models
Software Version 1_5_2 07/2017
CAUTION: Read these instructions before servicing the oven

TABLE
OF CONTENTS
5
INTRODUCTION
6
UTILITY CONNECTIONS
7
STANDARDS AND CODES
8
IMPORTANT SAFETY INFORMATION
9
SAFETY INSTRUCTIONS
Ready for use 9
LOCATING THE SERIAL NUMBER OF
10
THE OVEN
11
OPERATION PANEL
12
SETTINGS
Setting of temperature 12
Setting of time 12
Setting of core temperature (optional extra) 12
Programmes 13
Entering and changing text 14
Entering and changing data in steps 15
16
DESCRIPTION OF FUNCTIONS
Hot Air 16
Preheating 16
CombiSmart 17
Cook & Regen 17
Proving 17
Manual humidity pulsing 18
Steaming in a C model 18
General recommendations for steaming 18
Damper 18
2 SERVICE MANUAL
TABLE OF CONTENTS
Fan speed 19
Hours, date and setting of timer 19
Semi-automatic cleaning 20
21
MENU TABEL
22
USER MENU
25
SETUP MENU
26
TEST MENU
32
CLEANING OVEN EXTERIOR
Cleaning Behind the Filter Housing 32
33
CLEANING THE FILTER
34
WATER LAYOUT
36
I/O BOARD LED
37
FREQUENCY INVERTER
38
ERROR CODES
39
TROUBLESHOOTING ERROR CODES
47
SERVICE AND REPAIR
47
SAFETY
48
WARRANTY
SERVICE MANUAL 3

4 SERVICE MANUAL
Introduction
INTRODUCTION
Dear customer,
Thank you for choosing a CombiSlim 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.
Please 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.com.
Note that this document is subject to change without notice.
SERVICE MANUAL 5
Utility Connections
IMPORTANT
WARNING: Improper
installation, adjustment,
alternation, service or
maintenance can cause
property damage, injury
or death. Read the installation, operation and
maintenance instructions
thoroughly before
installing or servicing this
equipment.
The information
contained in this manual
is important for the
proper installation, use,
and maintenance of
this oven. Adherence to
these procedures and
instructions will result
in satisfactory cooking
and 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
correction. Specifications
are subject to change
without notice.
UTILITY CONNECTIONS
THE SERVICE INSTRUCTIONS CONTAINED HEREIN ARE FOR THE USE OF 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.
Qualified service/installation personnel are individuals, a firm, a corporation, or a company
which either in person or through a representative are engaged in, and responsible for:
•
•
•
the service/installation or replacement of gas piping and the connection, installation,
repair or servicing of equipment.
the installation, repair or service of electrical wiring from the electric meter, main
control box or service outlet to the electric appliance.
Qualified installation/service personnel must be experienced in such work, familiar
with all precautions required, and have complied with all requirements of state or local
authorities having jurisdiction.
6 SERVICE MANUAL
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
Important Safety Information
IMPORTANT SAFETY
INFORMATION
The following icons are used throughout this manual to draw special attention to safety
related information.
The service personnel should observe and/or act according to the information in order to obtain the best possible function of the oven.
The service personnel must observe and/or act according to the information in order to avoid any personal injury or damage to the oven.
The service personnel must observe and/or act according to the information in order to avoid any fatal injury. The symbol indicates a hazard
arising from dangerous voltage.
8 SERVICE MANUAL
Safety Instructions
SAFETY INSTRUCTIONS
Ready for use
When the oven is correctly installed, read this manual carefully before the oven comes into
service.
This manual should be kept handy to persons using the oven.
Always place trays filled with hot liquid in the bottom runners of the oven chamber to avoid
spilling the hot liquid on yourself when you take the tray out of the oven chamber.
Some areas on the outside of the oven may get as hot as 60°C or more, therefore, you
should only touch the front of the oven.
Do not open the oven during the automatic cleaning process.
Do not store flammable materials around or under the unit.
When using the roll-in or trolley system, be aware of hot racks sliding out of the oven. Use
the parking brakes on the wheels to prevent trolleys from rolling away on uneven floors.
Failure to comply with the above instructions may increase the risk of
fire!
SERVICE MANUAL 9
Locating the Serial Number of the Oven
LOCATING THE SERIAL
NUMBER OF THE OVEN
When you order parts or request service for your CombiSlim 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.
•
Production year and months.
•
Model type and size.
•
Voltage, power, phases and frequency.
•
Power consumption.
•
Wiring diagram number.
•
Water inlet max/min pressure.
•
Ipx grating.
10 SERVICE MANUAL
Operation panel
OPERATION PANEL
SETTING CORE TEMP. PROBE
(optional extra). Press once
and set with TURN SWITCH.
Deactivate by turning switch past
the permitted temp. range of
30-99°C.
TIME SETTING. Press once and
set time with TURN SWITCH. 4
hours is maximum. Confirm by
pressing TIME.
TEMPERATURE
SETTING. Press once
and set temperature
with TURN SWITCH.
Enter by pressing
symbol again.
HOT AIR 30-250°C. All
modes and all optional
extras are described
on following pages.
Preheating up to 300°C is a
standard feature on models
C and K.
REGENERATING / COMBI
STEAMING
Change between the modes
by pressing
PROVING
REGENERATING
COMBISMART
STEAMING 30-120°C (2).
Used for manual humidity
pulsing in HOT AIR during
preparation.
Main
switch
On/off
Switch
Turn
switch
PROGRAMMES.
Press once and
choose program
with TURN
SWITCH. Editing
and deleting are
described on
following pages.
STEP shows
current step when
PROGRAMME
mode is active.
Control lamp next
to ALARM lights
up when alarm
after a step has
been chosen
(when PRG is
active).
Setting of
FAN SPEED
When
control
lamp is on,
changes
have been
made.
(1) CombiSlim C models semi manually operated cleaning system can be activated by
pressing the programmes key
and turning the turn knob until CLEANING appears in
the display.
(2) The C model has no steam generator, but this mode makes it possible to steam in
the oven anyway. At temperatures between 65 and 100°C, you can steam all kinds of
vegetables, rice, pasta, meat and fish.
SERVICE MANUAL 11
DAMPER is open when
control lamp is on.
Setting of humidity level in
CombiSmart
When control lamp is on,
changes have been made.
Settings
SETTINGS
Setting of temperature
1.
Press TEMPERATURE key once and set temperature with turn knob.
2. Confirm by pressing TEMPERATURE key again.
Setting of time
1.
Press TIME key. Time flashes.
2. Choose desired time (hours and minutes) with turn knob.
3. If the knob is turned all the way down to 0,”-:--” (continuous operation) appears in
the display.
4. Max. time setting is 4 hours.
5. Confirm by pressing TIME key again.
Setting of core temperature (optional
extra)
1.
Press CORE TEMPERATURE key.
2. If the display is off, the core temperature appears as 75°C.
3. Set core temperature between 30 and 99°C with turn knob.
4. Core temperature is deactivated by turning knob past 30.
5. When core temperature is chosen, time changes to ”-:--” .
6. Confirm by pressing CORE TEMPERATURE key again.
12 SERVICE MANUAL
Settings
The core temperature probe has 3 measuring points on its tip.
The computer calculates an average temperature thus ensuring that the core temperature
is 100% correct.
If the probe is inserted incorrectly, the advanced technology notifies you at once.
The probe is inserted vertically in the thickest part of the product.
When preparing products of very different sizes, you get a uniform quality by inserting
the sensor in the smallest product and then moving it to a larger product when the core
temperature alarm sounds.
Programmes
50 programmes holding 10 process steps each. It is possible to write 10 characters and
entering alarm after steps 1 and 2.
1.
Press the programmes key
and turn the knob.
2. Start the programme by pressing the ON/OFF key.
3. To leave PROGRAMME, turn the knob beyond ”P O”.
4. To delete an entire programme, press core temperature key and alarm key simultaneously for 2 seconds.
When the keys or the turn knob is idle for 20 seconds, the oven returns to manual
operation.
SERVICE MANUAL 13
Settings
Entering and changing text
1.
To enter or change text, press the programmes key
for 3 seconds.
2. The first digit or the relevant letter/”_” flashes alternately. Change the flashing
character with the turn knob. You can choose between all the letters of the
alphabet and the digits 0 – 9.
3. The space sign is next to the letter A.
4. Move on to the next digit by pressing
5. Store text by pressing
briefly.
until “SAVED” appears in the display.
6. To leave text editing without storing, press ALARM. The original text reappears.
7. To delete the entire text, press the programmes key
for 2 seconds.
and ALARM simultaneously
When a key or the turn knob is idle for 20 seconds, the oven returns to select
programme .
14 SERVICE MANUAL
Settings
Entering and changing data in steps
By pressing STEP when PROGRAMME is active, the step display is turned on and shows ”1”.
The data of the first step can now be entered.
To move on to the next step (1-10) and read and change settings, press STEP again.
Choose and change temperature, time, core temperature, damper and fan as in manual
operation.
Stop between steps: To turn the alarm between steps on and off, press ALARM. If the control
lamp is on, the programme ends with the current step and a beep is heard. The oven does
not proceed to the next step until the oven door is opened and closed or you press ALARM.
To store a change made in the step mode, press the programmes key
for 2 seconds.
Leave STEP by choosing another programme with the turn knob.
Be careful not to use the turn knob when a value flashes. If you turn
the knob while you are working in STEPS, the computer switches to
the next programme and all changes are lost.
Delete current step by pressing STEP and ALARM simultaneously for 2 seconds.
When the programme has started, you can still change time, temperature, core temperature and the settings of fan and damper. These changes will then only be active in the
current run. Note that the display shows the total time remaining after start and that it will
show the time remaining in the current step when you press TIME.
SERVICE MANUAL 15
Description of Functions
DESCRIPTION OF
FUNCTIONS
Hot Air
30-250°C
The hot air operating mode can be used for roasting, grilling, baking and gratinating. We
recommend that you keep the damper open when roasting products at very high temperatures. It is possible to roast breaded products such as breaded fish and breaded pork chops.
For maximum effect, use enamelled cast iron trays / silicone-coated baking sheets and one
of the special browning fats available in the shops.
If you wish to cook at temperatures below 80°C, the fan speed should be reduced to below
50%
Preheating
251-300°C
By setting the temperature higher than 250°C, you change to the preheating mode and
PREHEAT is shown instead of HOT AIR. With this function, you preheat the empty oven.
The time can be set to max. 15 minutes, and continuous operation (-:--) is not possible.
The preheating mode has been changed so that the countdown does not start until the
desired temperature has been reached. This is to ensure that the oven is always in the same
condition when the oven is loaded, no matter the starting temperature.
It is recommended to always preheat the oven before use.
16 SERVICE MANUAL
Description of Functions
CombiSmart
30-250°C
CombiSmart is a function for humidity control which allows you to adjust the humidity level
in 10 steps (10-100). Press the damper key and adjust the level by turning the turn knob.
Confirm the setting by pressing the damper key again. The control lamp next to the damper
key will be on. In this function, the damper is usually closed, however, at the setting 0 the
damper opens.
Settings 20-50 are recommended for the production of whole roasts. The humidity helps
to seal the surface and keep the juice in the meat, which reduces shrinkage. These settings
are also recommended for the preparation of root vegetables and the like.
Settings 60-90 are recommended for the production of braised roasts for which you want
to use the juice in the container for gravy. The amount of liquid in the tray increases during
production. These settings are often recommended for roasts that should be well-done, to
keep some of the juice in the meat.
Cook & Regen
30–180°C
COOK & REGEN is a very gentle process and therefore very suitable for reheating. Use
a core temperature probe to reach the perfect end temperature. For the reheating of
sous-vide products, etc., follow the recommendations of the producer as to reheating. The
products should not be covered up as this impedes optimum and quick reheating.
Proving
30-40°C
PROVING is a function for raising bread by adding humidity at temperatures between 30
and 40°C. These are optimum conditions for the yeast to expand.
Fan Speed max 50%.
SERVICE MANUAL 17
Description of Functions
Manual humidity pulsing
When you press the key for STEAMING in the HOT AIR mode, you add humidity to the oven
chamber. Humidity is added for as long as the key is held down.
Steaming in a C model
30-120°C
Can be used for steaming of all types of vegetables, pasta, rice, meat, eggs and the like. If
the oven chamber is 100% loaded with frozen products, hard root vegetables or meat, it will
take a little longer until the oven chamber is completely filled with humidity, and the preparation time will be longer than if the oven chamber is only half full.
General recommendations for steaming
STEAMING at 100°C is recommended for all kinds of hard vegetables, rice and pasta.
LOW-TEMPERATURE STEAMING at 70-80°C is recommended for the steaming of fish.
FORCED STEAMING at 120°C is an aggressive and very rapid process, which should be used
with care.
IT IS RECOMMENDED TO LET THE OVEN PRESTEAM FOR 8 MINUTES BEFORE LOADING IT.
Damper
The damper is usually closed in all operating modes. When the control lamp is on, the
damper is open.
NOTE! In CombiSmart, this key is used for adjusting the humidity level.
The damper is always closed in the steaming mode.
If you wish to reduce the amount of humidity in the oven chamber – when you brown, for
instance – the damper should be open.
18 SERVICE MANUAL
Description of Functions
Fan speed
Set the FAN speed by pressing the fan key and turn the knob.
A fan speed between 20 and 50% is recommended for the baking of puff pastry, Danish
pastry, cakes and small products as well as in the Delta-T and Cook-and-Hold modes. You
may add 1 – 2 minutes’ preparation time for each hour when low fan speed is used.
Fan speeds below 50% cannot be used at temperatures above 200°C.
A fan speed between 50 and 100% are recommended if you want a particularly juicy end
product and accept a longer cooking time.
Hours, date and setting of timer
Shows the exact time and date when the oven is off. For setting of clock and timer, see USER
MENU from page 25.
SERVICE MANUAL 19
Description of Functions
Semi-automatic cleaning
This cleaning function can also be used on ovens with CombiWash. Simply deactivate
CombiWash in the user menu.
1.
Cool down oven chamber to 60°C.
2. Press the programmes key
and cleaning appears in the display. Press ON.
3. Press ON
4. When the alarm sounds (after 10 minutes) and add soap appears in the display,
open oven door and spray detergent into oven chamber. Close oven door and the
programme continues.
5. When the programme is over, rinse oven appears in the display (after another 10
minutes). Rinse oven chamber.
If the oven is very soiled, activate combi steaming 2 at 80°C for 30 minutes before starting
cleaning programme.
NOTE: Oven damage due to absence of a necessary HOUNÖ
PROTECT HydroShield water filter may render the warranty void.
NOTE: Oven damage due to lack of regular cleaning with HOUNÖ
PROTECT Detergent Intense and Rinse Aid may render the warranty
void.
20 SERVICE MANUAL
Menu tabel
MENU TABEL
USER MENU: Entering the User menu hold the BELL button for 5 seconds and the core
probe line of the display will show B 1.
SET UP MENU: Entering the SET UP menu hold the HOT AIR and STEAM buttons for 5
seconds and the core probe line of the display will show U 1
TEST MENU: Entering the test menu hold the HOT AIR and COMBI STEAM buttons for 5
seconds and the core probe line of the display will show U 1
User menu
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
27
28
29
34
37
38
40
44
45
46
47
Save default
Timer start
Sound low
Sound high
Sound frequency
Light
Actual temperature
Extraction
Time/graf
Minut
Hour
Date/weekday
Month
Year
Injection interval (reheat)
Save all
Restore
Restart time
Screen saver
Language
Software update
Setup menu
Test menu
Main Contactor
Heating
Oven size
Combiwash
Temperatur 0=C 1=F
Fan right
Fan left
Injection steam function
Restart after power cut
Drain cooling
Timer start
Demo mode
Initialise
Drain Cooling
Damper motor
Extraction
Cooling fan
Test sound
Light
Oven temperature
Core temperature
Drain temperature
Door sensor
Detergent pump
Rinse pump
Combiwash valve
Water pressure
Error log
Error statistic
Temp CPU
Temp I/O
SERVICE MANUAL 21
User menu
USER MENU
To enter the user menu, press BELL for 5 seconds while you are in the manual mode.
The display briefly shows ”USER MENU”. The core temperature display shows ”b” and the
number of the value to be set (see below).
You leave the user menu by turning the turn knob beyond ”0”.
Value
Function
Description
B1
Save defaults
Time and temperature can be changed in HOT AIR,
COMBI STEAMING and STEAMING and saved by pressing
ALARM. The alarm control lamp flashes when data are
ready to be saved.
The desired changes should be made before entering
the USER MENU.
B2
Timer start
Press STEP to change the various settings of the timer.
1) DATE. The date flashes in the temperature display. To
set the date, turn knob. 0 means daily start.
2) HOUR. Set the hour.
3) MINUTE. Set the minute.
4) MODE. Choose a mode by pressing one of the four
mode keys.
5) TEMPERATURE. Set the oven temperature.
6) TIME (duration of program) 0:00 - 4:00.
Press ALARM to activate timer (ON appears in the
temperature display and control lamp is on). Deactivate
by pressing ALARM. The oven can now be turned off with
the main switch or it can be left on standby. The oven
starts automatically but only in the manual mode.
B3
Sound low
Press STEP and adjust the volume of the alarm during
operation from 0 to 9.
B4
Sound high
Press STEP and adjust the volume of the alarm at the
end of a program/mode from 1 to 9.
B5
Sound
frequency
Press STEP and adjust from 1 to 9.
22 SERVICE MANUAL
User menu
Value
Function
Description
B6
Interior light
Press STEP: 0 = continuously on / 5 = off after 5 min.
B7
Current
temperature
0 = desired temperature / 1 = current temperature.
Adjust by pressing STEP.
B8
Extraction
Applicable only if oven has condensing extraction hood.
0 = extraction hood running independently of oven /
1 = extraction hood stops 10 minutes after oven has
stopped.
B9
Time graphics
Shown in text display during operation. Change by
pressing STEP.
0 = Display shows mode chosen
1 = Display alternately shows mode chosen and time
remaining.
B10
Minutes
Minutes are shown in temperature display. Change by
pressing temperature key and turning knob. Store by
pressing temperature key again.
B11
Hour
Hour is shown in temperature display. See 10.
B12
Day
Day of the month, 1-31. Day of the week, 1 – 7, in time
display. See 10.
In Europe, you can choose to have the computer switch
to summer time automatically. 0 = No change, 1 =
Change from/to summer time.
B13
Month
Month. See 10.
B14
Year
The year 2007 is indicated by ”7”. See 10.
U18
Injection
interval reheat
Setting of humidity pulsing. Press temperature key and
turn knob to change setting. The value indicates the
number of seconds between each injection into the oven
chamber. If the value is increased, less humidity is added
to the oven chamber, if the value is reduced, more
humidity is added (factory setting is every 8 seconds).
U19
Save all
Save all parameter settings and programs from the CPU
in the memory of the I/O board.
SERVICE MANUAL 23
User menu
Value
Function
Description
U20
Restore
Retrieve all parameter settings and programs from the
memory of I/O board
U21
Restart time
Sets the amount of minutes the restart button will
continue the last step the finished program.
U22
Screen saver
Interval of seconds before screen saver becomes active.
0 = 0 sec. / 1 = 10 sec. / 2 = 30 sec. / 3 = 60 sec./ 4 =
180 sec. / 5 = 600 sec. Change by pressing STEP.
U23
Language
Change language by pressing STEP button (1 – 9)
A and B column is chosen when updating the software.
U24
SW update
24 SERVICE MANUAL
A
B
1
Danish
English
2
English
Croatian
3
Swedish
Slovene
4
Finnish
Estonian
5
German
Hungarian
6
Spanish
Russian
7
French
Czech
8
Italian
9
Dutch
Updating of software. Special memory key required.
Contact your local distributor.
In this function, you update the computer software by
means of a special memory key (not a USB key).
1.
Insert memory key.
2.
Press alarm key to view software version and
language variants.
3.
Press step key to select language variant.
4.
Press alarm key again to start updating process.
The software version of the oven in question is also
shown in the start-up sequence when the oven is
switched on.
Setup menu
SETUP MENU
To enter the user menu, press HOT AIR and STEAM for 5 seconds while you are in the
manual mode.
The display briefly shows ”SETUP MENU”. The core temperature display shows ”b” and the
number of the value to be set (see below).
You leave the user menu by turning the turn knob beyond ”0”.
Value
Function
Description
U2
Oven size
Setting up the CPU to the right size of oven.
U3
Combiwash
Is the oven fitted with or without combiwash.
0 = Without Combiwash.
1 = With Combiwash
U4
Temperature
C/F
0 = Celsius
1 = Fahrenheit
U9
Restart after
power cut
Setup the amount of time the oven can be without
power and continue when the power returns.
(always follow local recalculations)
U11
Coreprobe
0 = Coreprobe inactive
1 = Coreprobe active
U12
Drain Cooling
0 = Drain cooling deactivated
1 = Drain cooling on in all water using functions.
2 = Drain cooling activ at all time.
U13
Timer Start
Activate or deactivated timer start
U14
Demo Mode
Deactivates the I/O board.
Display will look like the oven is working.
.
U15
Initialise
Reset the setting to default setting.
(except B1 it will remain until changed and confirmed by
pressing the bell).
SERVICE MANUAL 25
TEST Menu
TEST MENU
To enter the Test Menu, press HOT AIR AND COMBI STEAM for 5 seconds while you are in
the manual mode.
The display briefly shows ”TEST MENU”. The core temperature display shows ”D” and the
number of the value to be set (see below).
You leave the user menu by turning the turn knob beyond ”0”.
SAFETY: never leave a test menu activated oven. safety functions are disabled, if the unit is
not monitored the oven will only stop when the over heating safety is triggered.
Value
Function
Description
D0
Main contactor
This function activates contactor K1.
You activate or deactivate the function by pressing the
step key. The function can, however, only be activated
when the fan is on.
To pulse, press the alarm key.
0= OFF, 1= ON.
Status for the main alarms appear in the display as
follows:
Digit 1 fan
Digit 2 oven
Digit 3 generator
Digit 4 Solid State Relay
If ER28 appears, the IO board or wiring harness is
defective.
D1
Heating
This function will star heating by activating the SSR.
This function can only be activated when D0 main
contactor and D3 main fan motor is active.
26 SERVICE MANUAL
TEST Menu
Value
Function
Description
D3
Fan Right
This function will start up the main fan motor/motors at
maximum speed 1400RPM in right rotation direction.
The main fan motor speed can be changed by pressing
the clock and turn the knop until the display shows the
desired RPM.
This function can only be activated when D0 main
contactor is active.
D4
Fan Left
This function will start up the main fan motor/motors
at maximum speed 1400RPM in Left rotation direction.
The main fan motor speed can be changed by pressing
the clock and turn the knop until the display shows the
desired RPM.
This function can only be activated when D6 steam
main contactor is active.
D6
Injection steam
This will power up the coil for the injection steam valve
D9
Drain cooling
This function activates solenoid valve MV3.
You activate or deactivate the function by pressing the
step key.
To pulse, press the alarm key. 0= OFF, 1= ON.
D10
Damper motor
This function activates motor M3.
In the display next to ”Time”, it is possible to read the
status of the damper motor switch.
OFF= damper open, ON= damper closed.
You activate or deactivate the function by pressing the
step key.
To pulse, press the alarm key. 0= OFF, 1= ON.
D11
Exhaust
This function activates the outlet for controlling the
external ventilation, terminals 4 and 5.
In the display next to ”Time”, it is possible to read which
outlet is active.
OFOF= both outlets are off, ONOF= outlet 4 is active and
outlet 5 is off.
OFON= outlet 4 is off and outlet 5 is active. ONON= both
outlets are active.
You activate or deactivate the function by pressing the
step key.
0= OFOF, 1= OFON, 2= ONOF, 3= ONON.
SERVICE MANUAL 27
TEST Menu
Value
Function
Description
D12
Cooling fan
This function activates motors M7.
You activate or deactivate the function by pressing the
step key.
D13
Test Sound
This function will activated the alarm sound.
D14
Interior light
This function activates H1.
You activate or deactivate the function by pressing the
step key.
To pulse, press the alarm key.
0= OFF, 1= ON.
D15
Oven temperature
Here it is possible to read the current oven temperature,
PT100 sensor P1.
In the field next to ”Temperature”, the current temperature is shown. If ERR appears, the
sensor circuit is defective.
In the field next to ”Time”, an adjustment value between
80 and 120 (default 100) is shown.
To adjust the temperature, press the time key until the
digit in the display flashes. Then adjust
upwards or downwards until the correct temperature is
shown. Finally, press the time key
again to save the setting.
The temperature can be adjusted by +- 10°C.
28 SERVICE MANUAL
TEST Menu
Value
Function
Description
D16
Core probe
temperature
CombiSlom C models can use only one core temperature probe, it is possible, however, to
test core temperature probes 1 and 2.
Here it is possible to read the current temperature of the
core temperature sensor, P2 + P2A.
In the field next to ”Temperature”, the current temperature is shown. If ERR appears, the
sensor circuit is defective.
In the field next to ”Time”, an adjustment value between
80 and 120 (default 100) is shown.
To adjust the temperature, press the time key until the
digit in the display flashes. Then adjust
upwards or downwards until the correct temperature is
shown. Finally, press the time key
again to save the setting.
The temperature can be adjusted by +- 10°C.
You change between the various measuring points of
the core temperature probe by pressing
the step key.
1= Core temp.probe 1, point 1, 2= Core temp.probe, point
2, 3= Core temp.probe 1, point 3.
4= Core temp.probe 2, point 1, 5= Core temp.probe,
point 2, 6= Core temp.probe 2, point 3.
D18
Drain temperature
Here it is possible to read the current steam generator
temperature, P4.
In the field next to ”Temperature”, the current temperature is shown. If ERR appears, the
sensor circuit is defective.
In the field next to ”Time”, an adjustment value between
80 and 120 (default 100) is shown.
To adjust the temperature, press the time key until the
digit in the display flashes. Then adjust
upwards or downwards until the correct temperature is
shown. Finally, press the time key
again to save the setting.
The temperature can be adjusted by +- 10°C (approx.
0.5°C per step).
SERVICE MANUAL 29
TEST Menu
Value
Function
Description
D20
Door sensor
Here it is possible to read the status of and calibrate
door sensor 1 = SE1 and 2 = SE1A.
You change between door sensor 1 and 2 by pressing the
step key.
After some time, the text “DOOR SENSOR” changes to
show the status of the sensor:
>CLOSED<, >OPEN<, >SENS ERROR<. You start the
calibration by pressing the exhaust key.
How to calibrate:
1. Press the damper key
2. >CLOSE< flashes
3. Close the door
4. Press the damper key
5. >OPEN< flashes
6. Open door in the first step
7. Press the damper key
8. >CALIB OK< or >CALIB ERR< appears
9. Press the damper key to confirm
In the display next to the temperature key, it is possible
to read the current value (0 – 120).
In the display next to the time key, it is possible to read
the set point.
30 SERVICE MANUAL
TEST Menu
Value
Function
Description
D44
Error Log.
Here it is possible to read which error codes have been
reported. After 2 seconds, the error log
will show you which error code was reported most
recently and when.
By turning the switch to the right, you will see older
errors. The oven can save 30 errors after
which it deletes the oldest one.
LEAVE FUNCTION BY TURNING SWITCH TO THE LEFT.
D45
Error statistics
Here it is possible to read how many times each error
code has occurred. After 2 seconds, the
oven will show you when the error statistic was last reset
and the total number of errors. By
turning the switch to the right, you can scroll through all
error codes and see how many times
they have occurred.
LEAVE FUNCTION BY TURNING SWITCH TO THE LEFT.
D46
Temperature on
CPU board
Here it is possible to read the temperature of the CPU
board.
In the display next to ”Temperature”, the temperature of
the CPU board is shown. Max 60°C.
D47
Temperature on
I/O board
Here it is possible to read the temperatures of the IO
board.
In the display next to ”Temperature”, the temperature of
the IO board is shown. Max 60°C.
SERVICE MANUAL 31
Cleaning OVEN EXTERIOr
CLEANING OVEN EXTERIOR
1. Use a soft, damp cloth and a liquid detergent to clean the oven cabinet on the
outside,
2. Treat the surface with HOUNÖ STEEL OIL to protect it. The steal oil is available from
Steel oil can be purchased at our online webshop,
3. Remove the door sealing to clean under and around the door.
Note: do not use stal oile inside the cavity
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. Remove the racks.
2. Remove the baffle plates and the filter housing to gain access for clean behind the
oven cavity behind the filter housing.
32 SERVICE MANUAL
Cleaning the filter
CLEANING THE FILTER
The filter is located in the filter housing at the back of the top panel, it is removed by lifting
out of the the slot where it sits
You have to clean the filter 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.
SERVICE MANUAL 33
Water layout
WATER LAYOUT
34 SERVICE MANUAL
Water layout
WATER LAYOUT
Item
2
3
4
5
6
7
8
9
10
Description
Solenoid valve
Drip tray
Drain cooling nozzle
Seal between the oven cavity and the drain box
Drain box
Steam tube 50 mm
Over flow
Rubber hose connecting drain box
and steam tube
Drain temperature sensor
SERVICE MANUAL 35
I/O board led
I/O BOARD LED
Description, connection of the different led on the I/O to help under stand the different
functions of the I/O board
No
7
8
9
10
11
Colour
Green
Green
Green
Green
Green
Volt
Main
ER5
ER4
ER3
Er12
12
13
14
Yellow 24V F2 J10
Fuse F2 Power supply to I/O board
Yellow 24V F1 J2 Pin 1,3,5 Fuse F1 is ok
Yellow 24V F3 J8 Pin 3,6 Fuse F3 is ok
15
16
17
18
19
20
21
Red
Green
Green
Green
Green
Green
Green
22
23
24
Green Com
Green Com RX
Green Com TX
Slow flashing when I/O communicates with the CPU
Fast flashing when data received from CPU
Fast flashing when data is send to the CPU
25
26
Red
Red
Lights when communication is not working
Lights shortly under start
Reset
12V
5V
3,3V
5V out
12V
24V
Plug. Pin
J14 Pin 5
J14 Pin 4
J14 Pin 3
J14 Pin 2
J1 Pin 13
J1 Pin 15
J18 pin 1
J19 Pin 1
J20 Pin 1
Test 1
Test 2
36 SERVICE MANUAL
DESCRIPTION
Voltage to main contator ok.
Voltage fan alarm switch ok
Voltage oven overheating switch ok.
Voltage from steam generator switch ok.
.Voltage from SSR overheating switch
The I/O board is in a reset mode (flash only at start)
The internal 12V is present
The internal 5V is present
The internal 3,3V is present
External 5volt for door sensor and RPM sensor.
External 12V for the Clima optima sensor
External 24V voltage for the gas fan interface.
This option is only present on I/O board
P/N 30900015
Frequency inverter
FREQUENCY INVERTER
When replacing the frequency inverter.: Always check that the frequency inverter potentiometers and dip switches are set up correct.
To gain access to the potentiometer for adjustment the small transparent
hatch with a small screwdriver. as shown in the drawing.
ADJUSTMENT OF THE 3 POTENTIOMETERS OF THE FREQUENCY INVERTER
Motor i nom
This potentiometer controls the current output of the frequency
inverter.
This potentiometer must be set to 100%
ACC/DEC
HI FREQ
This potentiometer controls is the acceleration and deceleration of the
main fan motor in seconds.
The potentiometer must be set a few degrees past 5.
It is very important that the acceleration of the fan is 10 sec. +/-1 sec.
USE TEST MENU FAN
If the acceleration is to fast the inverter might be switching off to
overload. To slow will result in error 14.
This potentiometer controls the HZ output of teh frequency inverter.
This potentiometer must be set to NOM
SETTINGS OF THE DIP SWITCHES ON THE FREQUENCY INVERTER
HZ
Set to 50HZ
SILENT
Set to ON
LOAD
Set to P&F
JOG Hz
Set to 5
RELAY
Set to FLT
Al offset
Set to Off
Autoreset
Set to Off
Hi freq
Set to Off
SERVICE MANUAL 37
ERROR CODES
ERROR CODES
The list contains the error codes that can appear on a Combislim C version.
If Visual Cooking specific error code appear, the settings of CPU might be wrong for a
Combislim. And the CPU need to be setup correct.
ERROR CODE
DESCRIPTION
4
Oven too hot.
5
Fan too hot.
6
Drain too hot.
7
Oven sensor defective.
8
Core probe not connected.
10
Drain sensor defective.
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.
28
Error in alarm.
29
Door sensor error.
37
Cooldown error.
39
Insufficient memory.
40
I/O board too hot.
41
Main Alarm.
44
Exhaust error.
45
Error with 24V.
71
Core probe warning.
38 SERVICE MANUAL
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 4
The overheating switch of the oven chamber is off because the oven chamber temperature 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
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
-
Solution
Change the overheating
sensor.
SERVICE MANUAL 39
Troubleshooting ERROR CODES
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.
5
-
Change the I/O board.
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
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
is broken. (Measure the real temperature
and compare it to the temperature
measured by the test function.)
If broken, change the sensor.
4
Clean the jet and the solenoid valve at the
drain, and then check the temperature
again.
Change the I/O board
40 SERVICE MANUAL
Solution
Troubleshooting ERROR CODES
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,
and check whether the value matches
the value in the table and the current
temperature.
If no, change the sensor.
4
-
Change the I/O board
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,
and check whether the value matches
the value in the table and the current
temperature.
If no, change the sensor.
4
-
Change the I/O board.
SERVICE MANUAL 41
Troubleshooting 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,
and check whether the value matches
the value in the table and the current
temperature.
If no, change the sensor.
4
-
Change the I/O board.
Error Code 15
The CPU board temperature has risen above 60°C/140°F.
Steps
Check list
1
Go to the test menu to see which information the computer displays.
2
Check whether the ambient temperature is
too high.
Move the oven if necessary,
and clean the intake filter.
3
Check whether the test function temperature matches the current temperature.
Move the oven or the heat
source.
5
Check the cooling fan
Change the computer.
42 SERVICE MANUAL
Solution
Troubleshooting ERROR CODES
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 information the computer displays.
2
Check whether the ambient temperature is
too high.
Move the oven if necessary,
and clean the intake filter.
3
Check whether the test function temperature matches the current temperature.
Move the oven or the heat
source.
5
Check the cooling fan
Change the I/O board.
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 I/O board.
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
board and the CPU board.
Change the IO board or the
CPU board if necessary.
SERVICE MANUAL 43
Troubleshooting ERROR CODES
Error Code 21
Invalid program. The program you have chosen is not supported by the oven.
Steps
Check list
Solution
1
-
Download the program
combination that matches
this oven type.
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 28
An invalid combination of the mains alarm has been detected. The mains alarm is not
displayed correctly.
Steps
Check list
1
Go to the test menu (alarm test) to see
which one of the over heat safety switches
is not sending a feedback signal to the I/O
board connector J14.
2
Check the switch and cable and the cable
plugs from that specific overheating
sensor and the wire to J14.
Change the plug and repair
the wire if necessary, and
then test if the alarm have
disappeared.
3
If the error persist, and the feedback
signal to the I/O board is ok.
Replace the I/O board.
44 SERVICE MANUAL
Solution
Troubleshooting ERROR CODES
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 information 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
Error Code 40
The IO board temperature has been too high. Note that this is a warning. If the temperature 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
and check that the cooling fan behind the
front panel is running.
Clean the filter at the bottom
of the panel.
2
Check that the cooling fan behind the
front panel is running.
Replace cooling fan if
necessary.
SERVICE MANUAL 45
Troubleshooting 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 is
no on/off signal from the switch. Bridge the
two wires on the exhaust motor switch.
If exhaust signal changes in
the test menu, replace the
complete exhaust valve.
3
If the motor is not running, check that there
is a 24V power supply for motor.
24V is present, replace the
motor.
4
If there is no 24V power supply for the motor.
Measure the wires from the I/O board to the
connector for the valve motor.
Repair the damaged wire.
5
Measure the 24V power supply directly on
the I/O.
If the 24V is missing replace
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 connector J1
wire pin no 1-3-5)
If not, repair the wires.
2
Check the led F1 24V on the I/O board
Error 71
Coreprobe warning
Steps
Check list
Solution
1
Go to technician test menu and check
the feedback values from the three pt100
sensors in the core probe
If one is showing a different
value then the rest, replace
core probe.
2
Measure the wires from I/O board J1 to the
connector for the core probe
Wire is disconnected, replace
or repair disconnected wire.
46 SERVICE MANUAL
Service and Repair
SERVICE AND REPAIR
••
All maintenance and repair should be carried out by authorized installation and
service personnel only. Installation or service by other than authorized 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 intended for oven
cleaning on you CombiSlim oven.
SAFETY
Please read the safety instructions carefully.
••
Ensure that installation is carried out by authorized 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 vapours or liquids in the vicinity of this
appliance.
••
Do not touch hot surfaces. The temperature of some surfaces may exceed 60°C or
more.
••
Do not attempt to operate or open the oven during the automatic cleaning
process.
••
Use the parking brakes on the trolley wheels when the oven has been loaded to
prevent trolleys from rolling on uneven floors.
••
Contact authorized 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 47
Service and Repair
WARRANTY
If you have registered your CombiSlim oven on our website, it is covered by a 48-month
factory warranty. The warranty covers the oven cabinet and spare parts. There is a special
10-year warranty on the exterior door glass. The warranty takes effect from the date of
production.
To view the full terms of the warranty and to register, go to
http://www.houno.com/warranty/.
HOUNÖ’s general terms and conditions for
4-year warranty
The following parts warranty applies to HOUNÖ CombiSlim and Visual Cooking II SE ovens.
Here in after referred to as the Unit. The warranty is subject to the conditions set forth
below. The warranty covers any defect, which can be attributed to material or manufacturing defects during normal use of the Unit.
1. The warranty period runs for 48 months from the factory invoice date of the Unit.
The first 12 months is the general factory warranty.
The following 36 months covers all parts needed for covered repairs.
2. The warranty period can be postponed up to 6 months to start at the installation date.
Register the oven at HOUNÖ’s website www.houno.com to validate the extended parts
warranty. The unit must be registered within 8 weeks from the date of installation.
3. During the warranty term, the customer shall contact his supplier of the Unit and claim
warranty.
4. During the warranty term, HOUNÖ has the right to either repair or replace the defective
parts or to replace the Unit.
5. The warranty period will not be extended following the performance of warranty service
nor does it trigger a new warranty period.
6. HOUNÖ does not cover transport costs or risks when shipping warranty parts.
48 SERVICE MANUAL
Service and Repair
7. The warranty does not cover incorrect installation1. This applies to defects and damage
in connection with the use of soiled, aggressive water, sub-standard gas, or electricity with
unsuitable voltage or current.
a. Water quality must be verified during installation and if required, appropriate filter must
be applied and cartridge replaced as specified.
b. The installation checklist must be completed by an authorized service company and is
mandatory to the extended warranty.
8. Furthermore, the warranty shall not apply to damage and malfunctions caused by the
build-up of lime scale or calcium deposits in the Unit.
a. ‘Combiwash’ must be conducted regularly2. Oven Cleaner and Oven Rinse must be recognized products.
9. Warranty shall be excluded by incorrect use of the Unit3.
10. The warranty does not cover normal wear and tear of the Unit.
11. The warranty shall not apply if spare parts other than original HOUNÖ spare parts are
used during the warranty period.
12. The warranty shall not apply if the Unit is installed or serviced by a person who is not
authorized by HOUNÖ A/S, during the warranty period.
13. Lamps, seals and interior glass are not covered by the warranty.
In so far as the relations between the parties are not governed by the general terms and
conditions for warranty above, the general rules of Danish law shall apply. Any disputes
arising between the parties as to this warranty shall be settled by the court in Randers,
Denmark or by the Western Division of the Danish High Court (Vestre Landsret), dependent
on the value of the subject matter.
See the HOUNÖ Installation Manual for correct installation.
See the HOUNÖ Installation and Service Manual for correct operation.
3.
See the HOUNÖ User Manual for correct use.
1.
2.
SERVICE MANUAL 49
HOUNÖ A/S
ALSVEJ 1
DK-8940 RANDERS SV
DENMARK
T: +45 8711 4711
E: houno@houno.com
www.houno.com
www.hounoshop.com
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