Service instructions. Combi Steamer ASDE-B. energy. FlexiCombi MagicPilot

Service instructions Combi Steamer Unit Type of energy Unit type Model Translation from the original document 1/4/2017 FlexiCombi MagicPilot Electric Gas Tabletop unit Pedestal unit Tabletop unit Pedestal unit FKECOD61 5 FKECOD62 1 FKECOD11 5 FKECOD12 1 FKECOD21 5 FKECOD22 1 FKGCOD6 15 FKGCOD6 21 FKGCOD1 15 FKGCOD1 21 FKECOD21 5 FKECOD22 1 en-us R E G I S T E R WA R R A N T Y O N L I N E AT W W W. H E N N Y P E N N Y. C O M

Copyright All rights to text, graphics and pictures in this documentation are held by MKN Maschinenfabrik Kurt Neubauer GmbH & Co. KG. Distribution or duplication is exclusively permissible subject to a written consent of MKN. Copyright by MKN Maschinenfabrik Kurt Neubauer GmbH & Co. KG Manufacturer Copyright by MKN Maschinenfabrik Kurt Neubauer GmbH & Co. KG Halberstaedter Strasse 2a D-38300 Wolfenbuettel Telephone 0 53 31 / 89-0 Telefax 0 53 31 / 89-280 2 Service instructions

Directory of contents 1 Password overview... 7 2 Introduction... 8 2.1 About this manual... 8 2.2 Warranty... 8 3 Safety instructions... 9 4 Functional descriptions... 10 4.1 DynaSteam... 10 4.2 WaveClean... 11 5 Opening the appliance... 13 5.1 Control panel... 13 6 Service menu - appliance test... 14 6.1 Service menu... 14 6.1.1 Calling up the service level... 14 6.1.2 Service menu overview... 14 6.2 Appliance information... 15 6.3 Status information... 16 6.4 CombiDoctor... 19 6.5 Relay test... 20 6.6 WaveClean Test... 22 6.7 100 C + core temperature calibration... 23 6.7.1 Checking the calibration - single-chamber appliance 6.x / 10.x... 24 6.7.2 Checking the calibration - two-chamber appliance 20.x... 25 6.7.3 Calibrating the cooking chamber sensor - single-chamber appliance 6.x / 10.x... 26 6.7.4 Calibrating the cooking chamber sensor - two-chamber appliance 20.x. 27 6.8 DynaSteam test... 28 6.9 Emptying the water... 29 6.10 Data and time... 29 6.11 Installation height... 30 6.12 Audio settings... 30 6.13 Select signal tones... 31 6.14 LOA activation (only for energy type electric)... 31 6.15 Exporting log data... 31 6.16 Software update... 33 6.17 Importing additional content... 33 6.18 Restoring data... 34 6.19 Backing up data... 34 6.20 Water filter maintenance... 35 6.21 Importing contact data... 35 Service instructions 3

Directory of contents 6.22 Setting units... 36 6.23 Backup relay... 36 6.24 Settings parameters... 38 6.25 Status overview direct access... 40 7 Software... 41 7.1 Software update... 41 7.2 Importing additional content... 43 7.3 Importing the manufacturer's cookbook... 45 8 Trade show mode... 47 9 Electronics... 48 9.1 Overview of the controller... 48 9.2 Layout of the control board... 49 9.3 Configuration of the control board... 50 9.4 Safety overview... 53 10 Gas technology... 54 10.1 Basic principles... 54 11 Error messages... 55 11.1 Emergency operation... 55 11.2 Cooking chamber sensor defective (694, 695)... 56 11.3 Top cooking chamber sensor defective (696, 728)... 57 11.4 Bottom cooking chamber sensor defective (697, 729)... 58 11.5 Core temperature sensor defective (699, 700)... 59 11.6 Internal core temperature sensor defective (714, 716)... 60 11.7 External core temperature sensor defective (715, 717)... 60 11.8 Water vapor sensor defective (710)... 61 11.9 Excess temperature in the cooking chamber (ID73)... 62 11.10 Overtemperature control (TMP_ID2)... 63 11.11 Critical temperature in the electronics (MMI_ID50)... 63 11.12 Siphon temperature very high (SOF_ID20)... 63 11.13 Risk of frost (TMP_ID72, MMI_ID51)... 63 11.14 Fan defective or temperature limiter triggered (702)... 64 11.15 Fan defective. Cooking program was cancelled (701)... 66 11.16 Top fan defective. Automatic switching to emergency operation (703, 705)... 66 11.17 Bottom fan defective. Automatic switching to emergency operation (704, 706)... 67 11.18 Water pressure too low (709)... 68 11.19 Faulty CAN connection... 70 11.20 Failure to access external EEPROM (SOF_ID)12... 70 11.21 Door is open - cooking program was stopped... 70 4 Service instructions

Directory of contents 12 Gas faults and error messages... 71 12.1 No gas (OTH_ID1)... 71 12.2 No gas (top)(oth_id2)... 72 12.3 No gas (bottom)(oth_id3)... 72 12.4 No flame (OTH_ID4)... 72 12.5 No flame (top)(oth_id5)... 72 12.6 No flame (bottom)(oth_id6)... 72 12.7 Communication fault between I/O and ignition electronics (OTH_ID25)... 73 12.8 Communication fault between I/O and ignition electronics (top) (OTH_ID26)... 73 12.9 Communication fault between I/O and ignition electronics (bottom) (OTH_ID27)... 73 12.10 Checking the connection pressure... 74 12.11 Checking the gas magnetic valve and gas heat exchanger... 75 12.12 Checking the electrodes... 76 12.12.1 Glow electrode... 76 12.12.2 Ionization electrode... 77 Service instructions 5

Directory of contents 6 Service instructions

Password overview 1 Password overview Range Installation / commissioning CO 2 gas calibration Passw ord 2100 Setting all basic parameters (for example time / date). 999 Verification and calibration of exhaust emissions. Only for energy type - gas. Network settings 2000 Input network addressing. Only for units with touchscreen control. Basic settings / user 111 Setting of basic values for the user, functions, software update. Lockscreen 369 Deactivating the lockscreen in cooking mode. Only for units with touchscreen control. Trade show mode 888 Activation / deactivation for exhibition mode. Service menu 1967 Service range for authorized service technicians. Described in Installation instructions Installation instructions Installation instructions Operating instructions Operating instructions Service instructions Service instructions Service instructions 7

Introduction 2 Introduction 2.1 About this manual Target group Figures Spare parts This service manual contains information needed by the service technician for professional and correct fault isolation, repair and maintenance of the unit. The service technician must also observe the contents of the installation instructions and the user manual. Target group for this service manual is qualified personnel who are familiar with the technical functioning and operation of the unit. All figures in this service manual are intended as examples. Discrepancies can arise between this and the actual unit. To ensure the reliability of the unit and the individual components, it is essential that only genuine OEM parts be used. Spare parts can be identified exactly with the aid of the online database. 2.2 Warranty The warranty is void and safety is no longer assured in the event of: Modifications or technical changes to the unit, Improper use, Incorrect startup, operation or maintenance of the unit, Problems resulting from failure to observe these instructions. 8 Service instructions

Safety instructions 3 Safety instructions For servicing tasks, the service technician must be familiar with and observe regional regulations. In addition, the notes in the service manual must be observed. DANGER Danger to life due to electric current ü Disconnect power prior to performing gas and electrical work. Disconnect unit from the mains supply and secure it against restart. Check to ensure absence of voltage. DANGER Risk of fatal injury from gas ü Disconnect the unit from gas supply prior to performing gas installation tasks. Lock site gas supply and secure it against restart. Service instructions 9

Functional descriptions 4 Functional descriptions 4.1 DynaSteam Overview d e c b a a Steaming appliance with pressure switch d Reduction b Magnetic valve water vapor elimination e Water supply pipe c Heat exchanger (up to approx. 50 degrees) The electronics control the DynaSteam steaming appliance. They regulate the water quantity for generating steam. DynaSteam guarantees, regardless of the water pressure, the precise supply of the required quantity of water. The prerequisite for this is a customer-supplied water flow pressure between 2 and 6 bar. The water pressure is monitored using a pressure switch. The DynaSteam steaming appliance cannot be calibrated and is completely electronically controlled. The heat exchange heats the water in advance up to 50 C. The heat from the exhaust pipe is used for this. The water comes through the water supply pipe to the fan impeller in the cooking chamber. The fan impeller creates small water drops, which evaporate in the hot oven atmosphere. The water evaporates in the cooking chamber and on the fan impeller. The tapering of the hose stabilizes the water flow of the pulsing steaming unit. 10 Service instructions

Functional descriptions 4.2 WaveClean Functional overview a b c a Magnetic valve K12 c Pump G24 b Pump G16 The following purification stages are available on the fully automatic cleaning WaveClean: Short: duration of about one hour Normal: duration about two hours Extra: duration approximately three hours 1. Testing the cooking chamber temperature. Automatic cooling of the cooking chamber, if > 55 C. 2. Inserting the WaveClean cartridge. 3. Water exchange of siphon content by the siphon pump G24 and solenoid valve K12. 4. Circulation of water by means of pump G16. Thus pre-cleaning of the cooking chamber. Then anew siphon water exchange. The heater heats the oven to 55 C. 5. Start cleaning. Fan motor and WaveClean pump G16 active. Heating active. Heating the cooking chamber to about 70 C. The first layer of wax melts in the WaveClean cartridge. The cleaner falls into the cooking chamber and mixes with water. The fan motor operates in both directions of rotation and at different speeds. The cleaning phase duration depends on the selected program. Service instructions 11

Functional descriptions 6. A new water exchange of siphon content by means of the siphon pump G24 and solenoid valve K12. 7. Start of rinsing. Identical to step 5 (cleaning). Differences: Heating of the cooking chamber to 92 C. The second layer of wax melts in the WaveClean cartridge. The rinse agent drops into the cooking chamber and mixes with water. Final rinse to bring the ph value to the normal level. 8. In the programs "normal" and "extra" additional drying of the interior occurs by means of hot air. 9. Finally, an indicator for withdrawing the WaveClean cartridge appears, and has to be confirmed. INFORMATION Despite different cleaning durations, all cleaning steps require the same amount of water. During the cleaning process about 3 liters of water are provided by the steaming unit into the oven. WaveClean termination INFORMATION WaveClean forced rinsing The WaveClean forced rinse is automatically started by the operator in case of failure or premature termination. The duration is 12 minutes. An entry is made into the HACCP and in the diagnostic memory. 12 Service instructions

Opening the appliance 5 Opening the appliance 5.1 Control panel Opening the control panel Unlock the control panel with an Allen wrench, size 5. The control panel pops up automatically. Closing the control panel Close the control panel by repeatedly pressing the left side (particularly in the upper left). The control panel locks noticeably at multiple points. NOTICE Damage due to vapor / moisture There should be no gap between the control panel and housing. Service instructions 13

Service menu - appliance test 6 Service menu - appliance test 6.1 Service menu Functional testing of individual components 6.1.1 Calling up the service level Error analysis Maintenance Change basic settings Software update The graphics shown may deviate due to changes and different software versions. Calling up the Service menu Switch the appliance on. Touch the "Appliance functions" field. Display of Appliance functions menu. Touch "Settings" field. Display of PIN window. Enter password and touch Confirmation field. Display of menu Appliance test (Service menu). INFORMATION The password for the service menu is 1967 6.1.2 Service menu overview Selecting a menu element Display of the menu elements in the left area. Page change by swiping upward/downward. Select menu element by touching. 14 Service instructions

Service menu - appliance test 6.2 Appliance information Display of the appliance-specific information Installed software Appliance configuration Cookbook version Serial number Contact data Overview Exiting the appliance information Touch the Back field. Service instructions 15

Service menu - appliance test 6.3 Status information Status 1 Heating circuit PWM Heat requirement in %. POS Performance optimization system (option). B3 Lower chamber sensor. Only present in 20.x floor-mounted appliances. Status 2 Climate control, fan B14 Pressure switch on the DynaSteam unit PWM Heat requirement in %. M20 Bottom fan motor. Only present in 20.x floor-mounted appliances. B3 Bottom cooking chamber sensor. Only present in 20.x floor-mounted appliances. 16 Service instructions

Service menu - appliance test Status 3 WaveClean K04 B15 B14 B3 Magnetic valve for water vapor elimination & siphon filling Reed contact switch Pressure switch on the DynaSteam unit Bottom cooking chamber sensor. Only present in 20.x pedestal unit Status 4 Miscellaneous K10 Activation for optional condensation hood B15 Reed contact switch K03, K07 Not in use K13, K14 Not in use B3 Bottom cooking chamber sensor. Only present in 20.x pedestal unit Service instructions 17

Service menu - appliance test Status 5 Gas system B15 Chamber 1 Chamber 2 Flame signal Error Reset Reed contact switch Top heating system Bottom heating system. Only present in 20.x pedestal unit Flame was detected by ionization electrode / ignition electronics. LED green if error was reported by the ignition electronics and error number in the last hour. LED green if reset signal is sent by the I/O board to the ignition electronics and error number in the last hour. 18 Service instructions

Service menu - appliance test 6.4 CombiDoctor The CombiDoctor offers an automatic check of the climate control and the WaveClean automatic cleaning. The tests are possible individually or as overall test. For instructions on performing, see the touchscreen. Overview Selecting a program Program description Select a program by adjusting the roller. 1 Climate Automatic checking of the following areas/components Heating circuit Heating body, failure of a phase (only for energy type electric) Semiconductor relay SSR (only for energy type electric) Gas system (only for energy type gas) Temperature control DynaSteam steaming unit Air inlet flap 2 WaveClean Automatic checking of the WaveClean cleaning WaveClean pump (circulation pump) Siphon pump (drainage pump) Magnetic valve for water vapor elimination & siphon filling Starting the program Evaluation Reed contact switch of the cooking chamber door Touch the "START" field. The test result appears on the touchscreen. Entry in HACCP memory. Service instructions 19

Service menu - appliance test 6.5 Relay test Separate control of the relay. Testing the relay. Testing the connected components. INFORMATION Relays K1 and K16 are switched on permanently. A plurality of relays are switched on simultaneously. Overview Image: Relay test page 1 Image: Relay test page 2 Activating relay test Deactivating relay Touch field of relay to be tested. The relay is active. Field of the active relay is highlighted in green. Touch field to be deactivated that is highlighted in green. The relay is inactive. Field is highlighted in gray. 20 Service instructions

Service menu - appliance test Relay overview Relay Connect or No. Informatio n K1 X10 2 Main contactor Q1 230V AC K1 X11 1 POS A 230V AC K2 X11 2 POS B 230V AC K3 Solenoid valve for manual rinse 230V AC K4 X12 3 Solenoid valve for vapor quenching K12 230V AC K5 X12 4 Siphon pump G24 230V AC K6 X12 5 Backup relay K6 230V AC K7 Not in use K8 X17 1 Lift magnet fresh air M8 230V AC K9 Junior fan left / right direction K10 X13 1/2 Control for condensation hood Potential free K10 Junior fan on/off K11 X14 2 Cooling fan G7 230V AC K13 K14 Not in use Not in use K15 X1 2 Cooking chamber light 230V AC K16 X9 1/2 Supply for control panel (MMI) 24V DC K17 X12 1 Circulating pump G16 230V AC K18 X31 1-4 Steaming unit (switched directly, not via relay) 24V DC Service instructions 21

Service menu - appliance test 6.6 WaveClean Test Overview WaveClean test program for function check. Circulation pump Siphon pump Magnetic valve for water filling Door seal / leak tightness in door area INFORMATION Follow the instructions on the touch screen. The test is used exclusively for functional testing and not to clean the cooking chamber. Starting the test Touch the "START" field. Checking of the cooking chamber temperature. Automatic cooling off of the cooking chamber if > 70 C. Rinse and fill up siphon. Draining by pump G24. Filling by magnetic valve K12. Circulation and heating. The circulation pump G16 is switched on. Heating of the cooking chamber to 55 C. Rinse DynaSteam and siphon DynaSteam steaming unit is switched on. Another water change from the siphon. After 30 minutes, the WaveCleanTest ends. Canceling the test An abortion is possible at any time. Touch the "STOPP" field. Automatic rinsing of the siphon and test cancellation. 22 Service instructions

Service menu - appliance test 6.7 100 C + core temperature calibration Calibration for cooking chamber sensor and core temperature sensor. Testing the calibration. Performing the calibration. The cooking chamber sensor and core temperature sensor calibration is performed in one step. INFORMATION The units are factory calibrated. Recalibration is required only in exceptional cases. Overview j i h a b c d e f g a Back to the appliance test f Core temperature measurement values b Switching cooking chamber 1 g Save changed offset (top) / 2 (bottom) Only for twochamber appliance 20.x c Cooking chamber temperature h Help function (not used) d Saved offset i Offset setting e Average heat requirement j "Start/Stop" button Color detection of the temperature values INFORMATION During calibration, the temperatures are displayed in color: Red = temperature in invalid calibration range Green = temperature in valid calibration range Service instructions 23

Service menu - appliance test 6.7.1 Checking the calibration - single-chamber appliance 6.x / 10.x Prerequisite Checking the calibration Calibrated digital temperature measurement device. The temperature in the cooking chamber is < 100 C. Fix internal core temperature sensor and temperature sensor of external measurement device in the cooking chamber. Use a grill rack for this. Point the sensor tips upward in order to prevent measurement errors. Touch the "START" field. The cooking chamber is heated up to 100 C. Display of the current temperature on the touch screen. Wait until the cooking chamber temperature on the touch screen indicates 100 C (± 1 C). Compare displayed cooking chamber temperature with temperature of external measurement device. The external measurement device must display a temperature between 99 C 99.5 C. If the value is within the range, end checking. Touch the "STOP" field. If the value is outside of the range, calibration must be done. Continue with calibration (see 6.7.3 Calibrating the cooking chamber sensor - single-chamber appliance 6.x / 10.x, Page 26). 24 Service instructions

Service menu - appliance test 6.7.2 Checking the calibration - two-chamber appliance 20.x INFORMATION Prerequisite Two-chamber appliances (20.x) are equipped with two cooking chamber sensors. Two calibrated digital measurement devices or two-channel measurement device. The temperature in the cooking chamber is < 100 C. Checking the calibration Fix the temperature sensor of the two external measurement devices in the middle of the top and bottom chambers in the cooking chamber respectively. Fix the core temperature sensor in the middle of the bottom chamber. Use a grill rack for this. Point the sensor tips upward in order to prevent measurement errors. Touch the "START" field. The cooking chamber is heated up to 100 C. Display of the current temperature on the touch screen. Wait until the cooking chamber temperature indicates 100 C (± 1 C). Compare displayed cooking chamber temperature with temperature of external measurement device. The external measurement device for the cooking chamber 1 top must display a temperature between 99 C 99.5 C. Touch the "Cooking chamber 1" field Switch to cooking chamber 2 bottom The field changes to "Cooking chamber 2" The external measurement device must display a temperature between 99 C 99.5 C. If the values are within the range, end checking. Touch the "STOP" field. If one of the values is outside of the range, calibration must be done. Continue with calibration (see 6.7.4 Calibrating the cooking chamber sensor - two-chamber appliance 20.x, Page 27). Service instructions 25

Service menu - appliance test 6.7.3 Calibrating the cooking chamber sensor - single-chamber appliance 6.x / 10.x Prerequisite Calibration Saving the calibration Canceling the calibration Exiting the calibration Storing the calibration on SD card Execute Check calibration and do not switch appliance off. (see 6.7.1 Checking the calibration - single-chamber appliance 6.x / 10.x, Page 24) Temperature display on the touch screen indicates 100 C. Adjust offset value by adjusting the roller. Let 10 minutes adjustment time elapse. The external measurement device must display a temperature between 99 C 99.5 C. If necessary, adjust offset value again. Let 10 minutes adjustment time elapse. If the value is within the range, save calibration. Touch "Save offset" field. Saving of set value. Automatic calibration of core temperature sensor. Touch the "STOP" field. The calibration ends. Touch the Back field. Also save data on internal SD card (see 6.19 Backing up data, Page 34). 26 Service instructions

Service menu - appliance test 6.7.4 Calibrating the cooking chamber sensor - two-chamber appliance 20.x INFORMATION Prerequisite Two-chamber appliances (20.x) are equipped with two cooking chamber sensors. The calibration is done separately. Execute Check calibration and do not switch appliance off. Calibration Saving the calibration Canceling the calibration Exiting the calibration Storing the calibration on SD card (see 6.7.2 Checking the calibration - two-chamber appliance 20.x, Page 25) Cooking chamber 1 and cooking chamber 2 indicate 100 C. Adjust offset value by adjusting the roller. Change between the values of the top and bottom chamber with the field "Cooking chamber 1" / "Cooking chamber 2" Let 10 minutes adjustment time elapse. The external measurement devices must display a temperature between 99 C 99.5 C. If necessary, adjust offset again. Let 10 minutes adjustment time elapse. If the value is within the range, save calibration. Touch "Save offset" field. Saving of set value. Automatic calibration of core temperature sensor. Touch the "STOP" field. The calibration ends. Touch the Back field. Also save data on internal SD card (see 6.19 Backing up data, Page 34). Service instructions 27

Service menu - appliance test 6.8 DynaSteam test Requirement The DynaSteam test allows the function test of the DynaSteam steaming unit. Calibration of the steaming unit is not possible / necessary. Access to the water supply pipe in the cooking chamber. Left hooking-in point or tray trolley removed. Air baffle in the cooking chamber unlocked and unfolded. Overview Starting the test Check the water quantity Touch "Initialization" field. Automatic pre-rinse. Field changes to "START". Set water quantity using the rollers. Touch the "START" field. Activation of the DynaSteam steaming unit. The water comes runs from the water supply pipe into the cooking chamber. Collect the water from the supply pipe with a measuring container. Starting water test. After the predetermined amount of water has gone through, the steaming unit stops automatically. Compare amount of water with the set value. A deviation of +- 10% is within tolerance. INFORMATION Dual-chamber units (20.x) have two DynaSteam steaming units with parallel control. The specified quantity of water refers to one chamber. Perform DynaSteam test for each chamber separately. 28 Service instructions

Service menu - appliance test 6.9 Emptying the water Requirement Water drainage removes water residue from the unit to prevent frost damage during transport and idle period. Both water connections are connected to compressed air. The pressure may not exceed 6 bar. The cooking chamber temperature is < 130 C. Overview Starting to drain the water Canceling the water drainage Touch the "START" field. Start of the automatic water drainage. Display of the cooking chamber temperature and remaining time. Touch the "STOP" field. 6.10 Data and time Overview Setting the date and time Canceling the selection Tap the value to be changed. Use the number block to set the desired values by tapping. Touch the "OK" field. Changes saved. Touch the "Back" field. Service instructions 29

Service menu - appliance test 6.11 Installation height Overview Setting the set-up height Canceling the selection Set the set-up height by adjusting the rollers. Touch the "OK" field. Changes saved. Touch the "Back" field. 6.12 Audio settings Overview Setting the volume Canceling the selection Set the desired volume using the sliders. Touch the "OK" field. Changes saved. Touch the "Back" field. 30 Service instructions

Service menu - appliance test 6.13 Select signal tones Overview Set signal tones Canceling the selection Set the signal tone by adjusting the rollers. Touch the "OK" field. Changes saved. Touch the "Back" field. 6.14 LOA activation (only for energy type electric) Software activation for the optional connection to a customer-supplied performance optimization system. INFORMATION An additional modification of the appliance is required. With activation without retrofitting, the heating circuit will not be activated. Overview Changing the setting Canceling the selection Touch the "OK" field. Change saved. Automatic restart of the software. Touch the "Back" field. 6.15 Exporting log data Exporting log data Log data export to an external USB flash drive. The function is only required after consultation. Perform according to instructions on the touchscreen. Service instructions 31

Service menu - appliance test Touch the Confirmation field. Log data export begins. 32 Service instructions

Service menu - appliance test 6.16 Software update Performing the update Update of the software via the USB interface. Additional content (help texts, cookbooks, videos) will not be updated. Perform according to instructions on the touchscreen and description (see 7.1 Software update, Page 41). Tap the "OK" field. Update begins. Then a confirmation appears on the touchscreen. 6.17 Importing additional content Importing content Import of additional content (videos, graphics, help texts). Import is absolutely essential after the operating panel has been replaced. Perform according to instructions on the touchscreen. Touch the Confirmation field. Import the content. Then a confirmation appears on the touchscreen. Tap the "OK" field. Service instructions 33

Service menu - appliance test 6.18 Restoring data Restoring data Import function of parameters stored on the SD card. Import is absolutely essential after the operating panel has been replaced. Perform according to instructions on the touchscreen. Touch the Confirmation field. Restoring of the data from the SD card. Tap the "OK" field. Automatic restart of the software. 6.19 Backing up data Backing up data Export function of the parameters (for example, calibration values). Storage of the data on the internal SD card or USB stick (if present). Perform according to instructions on the touchscreen. Touch the Confirmation field. Back-up of the data. Then a confirmation appears on the touchscreen. Tap the "OK" field. 34 Service instructions

Service menu - appliance test 6.20 Water filter maintenance With use of a water filter on the soft water connection of the unit, a maintenance note may appear after the stored flow quantity has been reached. For this, the appropriate filter capacity must be determined and entered. Prerequisite The water filter supplies only one combi steamer. Only the soft water connection is connected to the filter. Overview Setting the capacity Canceling the selection Use the number block to set the desired values by tapping. Tap the "OK" field. Changes saved. Tap the "Back" field. 6.21 Importing contact data Preparing the data Importing data Import of service contact data. This data can be accessed by the operator under "Equipment information". Perform according to instructions on the touchscreen. Create the file "ContactData.txt" with favorite text editor on the computer. Open the file on the computer. Enter contact data distributed over 6 text lines. Save file on a USB flash drive. The file must be stored in the folder "FCImport". Perform according to instructions on the touchscreen. Touch the Confirmation field. Import the created contact data. Then a confirmation appears on the touchscreen. Service instructions 35

Service menu - appliance test 6.22 Setting units Overview To convert the units 1. Select the desired temperature and volume. 2. Touch the "OK" field. 6.23 Backup relay Locate defective relay Occupying the spare relay The control board has a spare relay, which allows alternative use in case of a relay failure. This is only possible with the listed relays. Call relay test in the service menu. Perform relay test. Locate defective relay by examining the output voltage at the corresponding outputs on the control circuit board. Do rewiring according to the table. Example: When using it for K8 (solenoid M8), rewire line from connector X17.1 to X12.5. INFORMATION In case of changes to the wiring, label or deposit note in the unit. Overview Assigning the backup relay Canceling the selection Relay overview Select the defective relay by means of the roller. Touch the "OK" field. Changes saved. Touch the "Back" field. 36 Service instructions

Service menu - appliance test Relay Connect or No. Instruction K1 X10 2 Main contactor Q1 Re-connect the line from X10. 2 to X12. 5 and to assign a reserve relay to it. K1 X11 1 POS A Re-connect the line from X11.1 to X12.5 and to assign a reserve relay to it. K2 X11 2 POS B Re-connect the line from X11. 2 to X12. 5 and to assign a reserve relay to it. K4 X12 3 Solenoid valve for vapor quenching K12 Re-connect the line from X12.3 to X12.5 and to assign a reserve relay to it. K5 X12 4 Siphon pump G24 Re-connect the line from X12.4 to X12.5 and to assign a reserve relay to it. K6 X12 5 Backup relay K6 Re-connect the line from X12.5 to X12.5 and to assign a reserve relay to it. K8 X17 1 Lift magnet fresh air M8 Re-connect the line from X17.1 to X12.5 and to assign a reserve relay to it. K17 X12 1 Circulating pump G16 Re-connect the line from X12.1 to X12.5 and to assign a reserve relay to it. Dismantling and reprogramming After changing the control board the original state is restored. Thus, the backup relay is not used unnecessarily. Establish the original condition of the wiring (from X12. 5 to Xx). Calling up the "Backup relay" in the Service menu. Select "OFF" using the roller. The backup relay is deactivated. Touch the "OK" field. Changes saved. Service instructions 37

Service menu - appliance test 6.24 Settings parameters Querying and setting additional parameters. Overview Selecting parameters Changing parameters Parameter overview Selecting parameters by adjusting the roller. Tap the "Read" field. Display of set parameters. Use the number block to set the desired values by tapping. Tap the "Write" field. Changes saved. No. Basic setting Standar d value Range of adjustment Explanation 7 User menu password 111 0-300 Password for the user menu (basic settings) 16 Cooking chamber 1 temperature offset (upper sensor on 20.x pedestal units) 17 Cooking chamber 2 temperature offset (lower sensor on 20.x pedestal units) 18 Sous vide temperature offset -9.9 - +9.9 K 21 Internal core temperature offset, sensor 1 22 Internal core temperature offset, sensor 2 23 Internal core temperature offset, sensor 3 24 Internal core temperature offset, sensor 4 25 External core temperature offset, sensor 1 26 External core temperature offset, sensor 2 27 External core temperature offset, sensor 3 28 External core temperature offset, sensor 4-9.9 - +9.9 K Ability to retrieve the saved temperature offset values. The can also be changed and saved. The calibration function in the Service menu is used for calibration! -9.9 - +9.9 K -9.9 - +9.9 K -9.9 - +9.9 K -9.9 - +9.9 K -9.9 - +9.9 K -9.9 - +9.9 K Ability to retrieve the saved temperature offset values. The can also be changed and saved. The calibration function in the Service menu is used -9.9 - +9.9 K for calibration! -9.9 - +9.9 K -9.9 - +9.9 K 38 Service instructions

Service menu - appliance test No. Basic setting Standar d value Range of adjustment 45 Generator operation 0 0 = Off 1 = On 48 Steam elimination mode 1 0 = Low 1 = Normal 2 = High 49 Controls the cooking chamber lamp when opening the cooking chamber door 50 Controls the cooking chamber lamp when closing the cooking chamber door 602 Maximum power outage duration for a warm start 0 0-60 seconds 1 0-60 seconds 100 s 90 600 seconds 607 Ready to Cook active 1 0 = Off 1 = On 609 Interval for saving the temperatures in the HACCP log 618 Ready to Cook Finished message interval 120 s 1 180 seconds 60 s 0 300 seconds 624 SES status 1 0 = Off 625 Minimum duration of cooking program for SES 1 = On 662 Lock screen active 0 0 = Off 1 = On 674 Auto-start 0 0 = No autostart 1= Direct favorites 2=Always 678 Scanner button available 1 0 = Hidden Explanation Only when using generators on ships. "Low" setting: Minimum water consumption, but higher condensate temperature and greater steam volume. "High" setting: Maximum water consumption, but lower condensate temperature and smaller steam volume. Time within which the cooking program will continue after interruption of the power supply. When the value is "0", Ready2Cook is permanently deactivated. Reminder interval after the Ready2Cook temperature is reached When the value is "0", the SES function is permanently deactivated. 6 min. 4-6 minutes If the overall duration of a cooking program is less than this value, the SES does not run. 1= Visible 695 PIN for operation lock 369 0 99999 Display of Lock Screen menu item Automatic start of a cooking program after selection from AutoChef / Favorite Display of scanner function in the title bar. Service instructions 39

Service menu - appliance test 6.25 Status overview direct access Overview Direct access in the status overview. Display of all processes and temperature in ongoing operation. a Calling up status overview Exiting the status overview Touch the invisible field three times quickly. Change of the display to the multi-page status overview (see 6.3 Status information, Page 16). Touch the Back field. Change to the display of the cooking process. INFORMATION The status overview is intended only for the service technician. 40 Service instructions

Software 7 Software 7.1 Software update Prerequisite Preparing the USB stick USB stick. Maximum size 32 GB. Formatting FAT32 (standard) or FAT. The disk should be empty if possible. Current software update. The update is provided as packed ZIP file. Open and download.zip file and unzip. In general, the unzipped folder is in the same directory as the previously compressed one. Copy unzipped folder "MMIUpdate" to the USB stick. The update file is in the folder. The file has the extension ".ugl". For example, "012200.ugl" (software update V1.22). Inserting the USB stick The USB interface is behind the cover on the bottom left of the housing. Service instructions 41

Software Performing the update Switch the unit on. Tap the "Unit functions" field. Display of Unit functions menu. Tap "Settings" field. Display of window "PIN". Enter password and tap Confirm field. The password for the Settings menu is 111. Select the "Software update" field on the left area of the menu by swiping. Tap the "Software update" field. Tap the "OK" field. The update begins. INFORMATION The update can take up to 20 minutes. The software is restarted several times. Do not switch unit off. Then a confirmation appears on the touchscreen. Tap the "OK" field. The software restarts automatically. 42 Service instructions

Software 7.2 Importing additional content Import function for manufacturer contents: Cookbook graphics Help information Prerequisite Preparing the USB stick Sound files USB stick. Maximum size 32 GB. Formatting FAT32 (standard) or FAT. The disk should be empty if possible. Current additional content. Additional contents are provided as packed.zip file. Open and download.zip file and unzip. In general, the unzipped folder is in the same directory as the previously compressed one. Copy the unzipped folder "MMIContent" to the USB stick. In the folder there are other subfolders. This may not be changed. Inserting the USB stick The USB interface is behind the cover on the bottom left of the housing. Service instructions 43

Software Importing additional content Switch the unit on. Tap the "Unit functions" field. Display of Unit functions menu. Tap "Settings" field. Display of window "PIN". Enter password and tap Confirm field. The password for the Settings menu is 111. Select the field "Import additional contents" on the left area of the menu by swiping. Tap the "Import additional contents" field. Tap the "OK" field. The data is imported. Then a confirmation appears on the touchscreen. Tap the "OK" field. 44 Service instructions

Software 7.3 Importing the manufacturer's cookbook Prerequisite USB stick. On the unit, the software version 1.29 (from 04/2014) or higher is installed. Checking the software version in the unit's information (see 6.2 Appliance information, Page 15). If necessary, perform software update (see 7.1 Software update, Page 41). Preparing the USB stick a TouchClassicDB.sdf b FCImport a Update file b FCImport folder Create "FCImport" folder on the USB stick. Copy update file to the "FCImport" folder. The update consists of one file. The file has the wording "TouchClassicDB.sdf". Inserting the USB stick Import MKN cookbook The USB interface is behind the cover on the bottom left of the housing. Switch unit on "I". Touch the "Appliance functions" field. Display of Appliance functions menu. Touch "Settings" field. Display of PIN window. With the keyboard, enter password "111". Display of menu "Settings". Select the field "Import MKN cookbook" on the left area of the menu by swiping. Service instructions 45

Software Exit selection Tap "Import MKN cookbook". Touch the Confirmation field. Import begins. Then a confirmation appears on the touchscreen. Touch the Back field. 46 Service instructions

Trade show mode 8 Trade show mode Prerequisite Trade show mode allows appliance operation for demonstration purposes. A single-phase power supply is required for operation. Appliance is connected on L1 and N. See also installation instructions. Calling up the selection Switch appliance on "I" Touch the "Appliance functions" field. Display of Appliance functions menu. Touch "Settings" field. Display of PIN window. Enter password 888 and touch Confirmation field. Display of Trade show menu. Switching trade show mode on Touch the "Trade show mode is off" field. Automatic restart of the software. Appliance is in trade show mode The active trade show mode is indicated on the screen. Switching off trade show mode Call up the Trade show mode menu. Touch the "Trade show mode is on" field. Automatic restart of the software. Appliance is normal operation. Service instructions 47

Electronics 9 Electronics 9.1 Overview of the controller Block diagram 230V AC T1 18V AC X1 X4 230V AC A10 A2 24V DC X7 X9 A1 X8 X3 230V AC A20 CAN X5 CAN X6 230V AC T10 M10 230V AC T20 M20 Legend A1 Control board M20 Lower fan motor (only 20.x) A2 Control panel T1 Transformer A10 A20 (Upper) electronic ignition (only for gas version) Lower electronic ignition (only 20.x gas) T10 T20 M10 (Upper) fan motor X8 Digital key (Upper) electronic ignition Lower electronic ignition (only 20.x) 48 Service instructions

Electronics 9.2 Layout of the control board Service instructions 49

Electronics 9.3 Configuration of the control board Connector X1 No. Conductor number 1 Input 10.7 V AC for lighting 2 3/4 Power supply I/O board 18V AC Connector X2 Connector X3 Connector X4 Connector X5 Connector X6 Connector X7 Connector X8 Not in use Digital ignition control for lower chamber (only for 20.x gas appliances) Digital ignition control (only for gas appliances), for 20.x upper chamber CAN bus line to the motor M1 (for 20.x upper chamber) CAN bus line to the motor M2 (only for 20.x, lower chamber) MMI communication Digital key. Contains device-specific information. Connector X9 (24V DC) No. Conductor number 1/2 Supply for control panel (MMI) Connector X10 (230V AC) No. Conductor number 1 Supply voltage for relay 2 Output K1, main contactor Q1 3-4/5 N Connector X11 (230V AC) optional No. Conductor number 1 Output K1, LOA A 2 Output K2, LOA B 3 Input 230V, LOA C 4-5 N Connector X12 (230V AC) No. Conductor number 1 Output K17, WaveClean pump G16 2-3 Output K4, solenoid valve K12 4 Output K5, siphon pump G24 5 Output K6, backup relay 50 Service instructions

Electronics No. Conductor number 6-7 N Connector X13 (potentialfree) optional Connector X14 (potentialfree) Connector X15 / X16 Control for condensation hood via K10 No. Conductor number 1 Input K11, cooling fan G7 (230V AC) 2 Output K11, cooling fan G7 (230V AC) Not in use Connector X17 (230V AC) No. Conductor number Connector X19 / X20 Connector X21 Connector X22 / X23 1 Output K8, solenoid M8 2 N for solenoid M8 Not in use Reed contact switch for cooking chamber door B15 Not in use Connector X24 B1 core temperature sensor 1 Connector X25 Connector X26 Connector X27 Connector X28 B2 cooking chamber sensor 1 (for 20.x upper chamber) B3 cooking chamber sensor 2 (for 20.x lower chamber) B4 Vapor sensor B5 moisture sensor Connector X29 (optional) B6 Sous Vide sensor, B7 core temperature sensor 2 Connector X31 (24V DC) No. Conductor number 1 Output +, steaming unit valve 1 2 Output -, steaming unit valve 1 3 Output +, steaming unit valve 2 4 Output -, steaming unit valve 2 5 Output +, pressure switch B14 6 Input +, from pressure switch B14 7 0 V Connector X32 (24V DC) No. Conductor number Connector X35 1/2 Output SSR 1 3/4 Output SSR 2 Not in use Service instructions 51

Electronics Button The buttons have no function and are intended for internal use. 52 Service instructions

Electronics 9.4 Safety overview Layout F4 6,3A 230V AC T1-F2 3,15A T1-F1 3,15A T1 10,7V AC 18V AC E A1 A1-F3 3,15A 230V AC B11/B12 Q1 K12 A1 G16 G24 A1-F5 3,15A A1-F2 3,15A 230V AC 24V DC K6 M8 A2 B13 G7 F1 6,3A F2 6,3A G10 A10 T10 G20 A20 T20 M10 M20 Legend A1 Control board G16 WaveClean pump A2 Control panel G24 Siphon pump A10 Upper electronic ignition K6 Backup relay A20 B11 B12 Lower electronic ignition (only 20.x)* (Upper) cooking chamber STB 1 Lower cooking chamber STB 2 (only 20.x) K12 M8 M10 Quenching solenoid valve Solenoid (Upper) fan motor B13 Thermal switch M20 Lower fan motor (only 20.x) E Cooking chamber light Q1 Main contactor F Fuse T1 Transformer G7 Cooling fan T10 (Upper) electronic ignition G10 (Upper) gas fan* T20 Lower electronic ignition (only 20.x) G20 Lower gas fan* *= Only for gas version Service instructions 53

Gas technology 10 Gas technology 10.1 Basic principles Functional diagram Ionization (Flame detection) Glow electrode Gas heat exchanger Air Gas - solenoid valve Fan Gas fan speed PWM signal Transformer Control board A1 Digital electronic ignition BUS communication Functional description 1. The control board issues a request to the electronic ignition unit. 2. The electronic ignition starts the gas fan. A feedback of the speed is issued. 3. The glow electrode is turned on. 4. After a preheating time of 2 seconds the gas solenoid valve is additionally actuated. 5. The combustion process begins. 6. The flame is detected by the control unit via the ionization electrode. 7. The heating capacity is regulated over gas fan speed. INFORMATION There is permanent communication between the control board and ignition electronics. All information is visible in the status overview or in the CO 2 calibration. Faults are indicated by corresponding error messages. 54 Service instructions

Error messages 11 Error messages 11.1 Emergency operation In order to allows limited use in case of error, the appliance has various emergency programs. Emergency operation is activated automatically and displayed. After elimination of the error indicated, the controller switches back into regular operation automatically. A reset is not necessary. INFORMATION Emergency programs handle the limited further operation of the appliance until servicing. Deviating cooking results and temperature deviations are possible. Overview 6.x, 10.x tabletop units Chamber sensor faulty. Water vapor sensor defective Fault message displayed Internal core temperature sensor faulty. Cooking program will be abandoned. Cooking program can be restarted after changing to external core temperature sensor. External core temperature sensor faulty. Cooking program will be abandoned. Cooking program can be restarted after changing to internal core temperature sensor. The core temperature sensor takes over the function of the cooking chamber sensor. The software controls the water vapor elimination. This results in higher water consumption. The core temperature sensor is deactivated. 20.x pedestal units Upper chamber sensor faulty. Lower chamber sensor faulty. Water vapor sensor defective Fault message displayed Internal core temperature sensor faulty. Cooking program will be abandoned. Cooking program can be restarted after changing to external core temperature sensor. External core temperature sensor faulty. Cooking program will be abandoned. Cooking program can be restarted after changing to internal core temperature sensor. Top fan defective. Only up to version 1.55. Bottom fan defective. Only up to version 1.55. Service instructions Measurement of the cooking chamber temperature is done exclusively by the bottom cooking chamber sensor. Measurement of the cooking chamber temperature is done exclusively by the top cooking chamber sensor. The software controls the water vapor elimination. This results in higher water consumption. The core temperature sensor is deactivated. Deactivation of the top heating circuit. Deactivation of the bottom heating circuit. 55

Error messages 11.2 Cooking chamber sensor defective (694, 695) Location Naming on the circuit diagram Troubleshooting Emergency operation is activated automatically and displayed. The core temperature sensor takes over the function of the cooking chamber sensor. Cooking program with core temperature sensor is no longer available. The cooking chamber sensor is in the top right of the cooking chamber. B2 Unlock and open control panel. Check contacting on control board A1, X25. Remove existing cooking chamber sensor from the control board A1, X25 and plug in new cooking chamber sensor. The fault message disappears. Replace cooking chamber sensor. The fault message is still displayed. Replace control board. Function check The measurement values can be called up in the status overview. 56 Service instructions

Error messages 11.3 Top cooking chamber sensor defective (696, 728) Location Naming on the circuit diagram Troubleshooting Emergency operation is activated automatically and displayed. Measurement of the cooking chamber temperature is done exclusively by the bottom cooking chamber sensor. The cooking chamber sensor is in the top right of the cooking chamber. B2 Unlock and open control panel. Check contacting on control board A1, X25. Remove existing cooking chamber sensor from the control board A1, X25 and plug in new cooking chamber sensor. The fault message disappears. Replace cooking chamber sensor. The fault message is still displayed. Replace control board. Function check The measurement values can be called up in the status overview. Service instructions 57

Error messages 11.4 Bottom cooking chamber sensor defective (697, 729) Location Naming on the circuit diagram Troubleshooting Emergency operation is activated automatically and displayed. Measurement of the cooking chamber temperature is done exclusively by the top cooking chamber sensor. The cooking chamber sensor is in the middle right of the cooking chamber. B3 Unlock and open control panel. Check contacting on control board A1, X26. Remove existing cooking chamber sensor from the control board A1, X26 and plug in new cooking chamber sensor. The fault message disappears. Replace cooking chamber sensor. The fault message is still displayed. Replace control board. Function check The measurement values can be called up in the status overview. 58 Service instructions

Error messages 11.5 Core temperature sensor defective (699, 700) Location Naming on the circuit diagram Troubleshooting The core temperature sensor in the cooking chamber is deactivated. The core temperature sensor is in the front area of the cooking chamber. B1 Unlock and open control panel. Check contacting on control board A1, X24. Remove existing core temperature sensor from the control board A1 X24 and plug in new core temperature sensor. The fault message disappears. Replace core temperature sensor. The fault message is still displayed. Replace control board. Function check The measurement values can be called up in the status overview. Service instructions 59

Error messages 11.6 Internal core temperature sensor defective (714, 716) Location Naming on the circuit diagram Troubleshooting The internal core temperature sensor in the cooking chamber is deactivated. The core temperature sensor is in the front area of the cooking chamber. B1 Identical to "Core temperature sensor defective" (see 11.5 Core temperature sensor defective (699, 700), Page 59). 11.7 External core temperature sensor defective (715, 717) Location Naming on the circuit diagram Troubleshooting The external core temperature sensor is deactivated. The core temperature sensor is plugged into socket X29 on the control panel. B7 Make sure that the external core temperature sensor was connected properly. Replace external core temperature sensor. Check connection socket X23 for corrosion. Replace if necessary. Check contacting on control board A1, X29. Replace the control board. Function check The measurement values can be called up in the status overview. 60 Service instructions

Error messages 11.8 Water vapor sensor defective (710) Location Naming on the circuit diagram Troubleshooting Emergency operation is activated automatically and displayed. The software controls the water vapor elimination. The water vapor sensor is on the left side of the siphon. B4 Unlock and open control panel. Check contacting on control board A1, X27. Remove existing water vapor sensor from the control board A1 X27 and plug in new cooking chamber sensor. The fault message disappears. Replace water vapor sensor. To do this, remove the left side wall. The fault message is still displayed. Replace control board. Function check The measurement values can be called up in the status overview. Service instructions 61

Error messages 11.9 Excess temperature in the cooking chamber (ID73) The measured temperature in the cooking chamber is outside the allowable range (electric power supply > 310 C; energy type gas > 290 C). The unit is no longer operational until the cooking chamber cools down. The measurement is taken by the cooking chamber sensor, core temperature sensor and the moisture sensor. Prerequisite No display of fault messages from the temperature sensor. Troubleshooting Type of energy - electric Remove the left side wall. Switch unit to "I" Troubleshooting Type of energy - Gas Measure the voltage / current consumption on the load side of the semi-conductor relay. Voltage / current is present and the LED on at least one of the semi-conductor relays if off. Semiconductor relay is defective. Replace component and check that fan impeller is balanced. Measure the control voltage on the input side of the semiconductor relay. Voltage is present and the LED on at least one of the semiconductor relays if on. Control board A1 defective. Replace component. CO 2 perform calibration. 62 Service instructions

Error messages 11.10 Overtemperature control (TMP_ID2) Troubleshooting The temperature sensor on the control board is measuring a temperature of >70 C. The unit is no longer operational until it cools down. Check air intake area of fan. Clean dirty air intake area. Check that cooling fan is functioning properly. To do so, use the relay test in the Service menu to switch on the cooling fan. The cooling fan does not start. Measure the voltage at the fan. Voltage present = Cooling fan defective. Voltage not present = Relay on the control board defective. Replace control board. The cooling fan starts. Check surroundings and ambient temperature. See also installation instructions. 11.11 Critical temperature in the electronics (MMI_ID50) Troubleshooting The temperature sensor on the control board is measuring a temperature of >70 C. The unit is no longer operational until it cools down. Check air intake area of fan. Clean dirty air intake area. Check that cooling fan is functioning properly. To do so, use the relay test in the Service menu to switch on the cooling fan. The cooling fan does not start. Measure the voltage at the fan. Voltage present = Cooling fan defective. Voltage not present = Relay on the control board defective. Replace control board. The cooling fan starts. Check surroundings and ambient temperature. See also installation instructions. 11.12 Siphon temperature very high (SOF_ID20) Prerequisite Troubleshooting The temperature in the siphon is >100 C. The water vapor sensor B4 is used for the measurement. Water supply available on-site at both water connections. Fill the siphon with 2 liters of water from inside the cooking chamber. Check the solenoid valve for steam removal K12 by means of the relay test. Perform the WaveClean test. 11.13 Risk of frost (TMP_ID72, MMI_ID51) Troubleshooting The unit is not ready for use. The temperature sensor on the control board is measuring a temperature of <0 C. Increase the room temperature and switch on unit again. Change location of the unit. Service instructions 63

Error messages 11.14 Fan defective or temperature limiter triggered (702) The control board A1 does not receive any response via the CAN bus cable from fan motor M10. There is an error in the safety circuit or fan area. Overview a 5 d 1 b 1 3 c a Fan motor M10 c Power supply X1 b Power board T10 for fan motor d Connection for fan motor X2 Plug assignment power board Connector X1 (c) Connector X2 (d) 1 L1 230V 1 320V DC+ 2 N 2 Ground 3 PE 3 15V DC+ 4-5 PFC DANGER Warning: electric shock! Danger of death! When working on the power board, make sure that energized parts are exposed. Work on these components during operation and up to 3 minutes after enabling is not allows. Even if the motor is stopped and the appliance is de-energized, the connection terminals and components can conducted dangerous voltage! Locating errors Location of whether there is an error in the STL circuit (STL = safety temperature limiter) or in the fan area. 64 Service instructions

Error messages Troubleshooting the safety circuit Troubleshooting the fan motor Switch unit on and measure voltage at main contactor Q1, terminals A1 and A2. The main contactor must be energized. No voltage present. There is an error in the STL circuit. Troubleshooting according to "Troubleshooting safety circuit". Voltage present. There is an fault in the fan area. Troubleshoot according to "Troubleshooting the fan". The safety temperature limiter has tripped. Reset the safety temperature limiter. Check semiconductor relay and replace if necessary. The safety temperature limiter has not tripped. Check fuse F3 on control board A1. Replace if necessary. Check main contactor Q1 and control board A1. Check relay K1 on the control board. If necessary, use backup relay or replace control board. Replace communication cable between motor control and motor for test purposes and perform test run. Switch unit on "I." Check voltage supply at connector X1. No voltage present. Fuse F1 blown. Replace power board for motor. No voltage present. Fuse F1 is not blown. Check main contactor Q1 and control board A1. Check output voltage at connector X2. No voltage present. Replace power board for motor. Voltage present. Replace fan motor. Function check The measurement values can be called up in the status overview. Service instructions 65

Error messages 11.15 Fan defective. Cooking program was cancelled (701) The control board A1 does not receive any response via the CAN bus cable from fan motor M10. Troubleshooting (see 11.14 Fan defective or temperature limiter triggered (702), Page 64) 11.16 Top fan defective. Automatic switching to emergency operation (703, 705) The control board A1 does not receive any response via the CAN bus cable from the top fan motor M10. Troubleshooting (see 11.14 Fan defective or temperature limiter triggered (702), Page 64) 66 Service instructions

Error messages 11.17 Bottom fan defective. Automatic switching to emergency operation (704, 706) The control board A1 does not receive any response via the CAN bus cable from the lower fan motor M20. Overview a 5 d 1 b 1 3 c a Fan motor M20 c Power supply X1 b Power board T20 for fan motor d Connection for fan motor X2 Connector X1 (c) Connector X2 (d) 1 L1 230V 1 320V DC+ 2 N 2 Ground 3 PE 3 15V DC + 4-5 PFC DANGER Warning: electric shock! Danger of death! When working on the power board, make sure that energized parts are exposed. Work on these components during operation and up to 3 minutes after enabling is not allows. Even if the motor is stopped and the appliance is de-energized, the connection terminals and components can conducted dangerous voltage! Service instructions 67

Error messages Troubleshooting the safety circuit Troubleshooting the fan motor 1. At least one of the safety temperature limiters has tripped. Reset the safety temperature limiter. Check semiconductor relay for bottom heating circuit and replace if necessary. 2. The safety temperature limiter has not tripped. Check fuse F3 on control board A1. Replace if necessary. Check main contactor Q1 and control board A1. Check relay K1 on the control board. If necessary, use backup relay or replace control board. Replace communication cable between motor control and motor for test purposes and perform test run. Switch unit on "I." 3. Check voltage supply at connector X1. No voltage present. Fuse F1 blown. Replace power board for motor. No voltage present. Fuse F1 is not blown. Check main contactor Q1 and control board A1. 4. Check output voltage at connector X2. No voltage present. Replace power board for motor. Voltage present. Replace fan motor. Function check The measurement values can be called up in the status overview. 11.18 Water pressure too low (709) Location This fault message is displayed if the pressure switch registered a water pressure that is too low. The pressure switch is on the DynaSteam steaming unit. a c b a Pressure switch c Water supply pipe in the cooking chamber b Sieve INFORMATION 20.x pedestal units have two steaming units. 68 Service instructions

Error messages Naming on the circuit diagram Troubleshooting B14 Ensure on-site water supply to soft water connection of unit. The flow pressure at the water connection must be at least 2 bar. Check sieve on the water connection for soiling. To do this, remove the on-site water connection to the unit. For additional troubleshooting, swing out the air diverter in the cooking chamber. Perform the DynaSteam test in the Service menu. Water runs through the water supply pipe into the cooking chamber. Perform DynaSteam test again and check water quantity with measurement container. The water quantity corresponds to the set quantity (±10%). Replace pressure switch. The water quantity does not correspond to the set quantity (±10%). Ensure that the supply pipe is not clogged. Replace steaming unit. Perform the DynaSteam test in the Service menu. No water runs through the water supply pipe into the cooking chamber. Check water supply pipe for calcification. Ensure that the hose between the steaming unit and supply pipe is not clogged. Replace steaming unit. Service instructions 69

Error messages 11.19 Faulty CAN connection Troubleshooting There is a communication fault between the operating panel and control panel. In addition, temperature sensor and fan fault messages appear on the touchscreen. Replace communication cable between operating panel and control panel circuit board. Replace control board. Replace operating panel. 11.20 Failure to access external EEPROM (SOF_ID)12 Troubleshooting It is not possible to access the digital key (EEPROM). Make sure that the digital key is oriented correctly and inserted fully. The side with the hole must point to the sensor connections. Digital key defective. Control board defective. 11.21 Door is open - cooking program was stopped In fault-free operation, this message appears if the cooking chamber door is opened during an active cooking program. If the message is displayed with a closed cooking compartment door, there is an error on the reed contact switch or door magnet. Location a b Naming on the circuit diagram Troubleshooting a Reed contact switch b Door magnet Reed contact switch B15 Operation of the reed contact switch is displayed in the status overview. 1. Open cooking chamber door. Check reed contact switch operation with external magnet. The magnet is not detected. Check reed contact switch and replace if necessary. The magnet is detected. Check magnet in cooking chamber door for correct position and replace if necessary. 70 Service instructions

Gas faults and error messages 12 Gas faults and error messages 12.1 No gas (OTH_ID1) This error message only appears if on the first gas request on program start there is no response. Prerequisite Ensure customer-supplied gas supply according to installation instructions. Troubleshooting The connection pressure and the flow pressure are always within the specifications. For this, the gas pressure must be measured on the gas magnetic valve. Here the maximum gas requirement of all appliances connected to the gas supply must be considered. Also make pressure measurements with maximum loading of the gas supply. The installed gas plate is correct. Remove the left side wall. 1. Start cooking program. Ignition is occurring. The ionization electrode or the ignition electronics does not detect the flame. 2. Start cooking program. Ignition is not occurring. The glow electrode does not light up (visual inspection). Check the voltage and fuses on the transformer, ignition electrode, and glow electrode. 3. Start cooking program. Ignition is not occurring. The glow electrode is functioning properly. Check gas fan for proper operation. Check the gas solenoid valve. Visually inspect and check the gas heat exchanger in the cooking chamber for leaks. 4. Start cooking program. Ignition is not occurring. The glow electrode is functioning properly. The ignition electronics are defective and do not activate the gas magnetic valve. INFORMATION Perform troubleshooting using the Service menu, CO 2 calibration area or the status overview. This is where all requirements and responses are displayed. Service instructions 71

Gas faults and error messages 12.2 No gas (top)(oth_id2) Troubleshooting This error message only appears if on the first gas request on program start there is no response. The fault message refers to the upper burner on 20.x pedestal units. Further fault message as for error message No gas (see 12.1 No gas (OTH_ID1), Page 71). 12.3 No gas (bottom)(oth_id3) Troubleshooting This error message only appears if on the first gas request on program start there is no response. The error message refers to the lower burner on 20.x pedestal units. Further fault message as for error message No gas (see 12.1 No gas (OTH_ID1), Page 71). 12.4 No flame (OTH_ID4) Troubleshooting This error message only appears if on the first gas request on program start the flame was detected (response from ionization electrode present) and then was lost (no response from the ionization electrode). Prerequisite and troubleshooting as for error message No gas (see 12.1 No gas (OTH_ID1), Page 71). 12.5 No flame (top)(oth_id5) Troubleshooting This error message only appears if on the first gas request on program start the flame was detected (response from ionization electrode present) and then was lost (no response from the ionization electrode). The fault message refers to the upper burner on 20.x pedestal units. Prerequisite and troubleshooting as for error message No gas (see 12.1 No gas (OTH_ID1), Page 71). 12.6 No flame (bottom)(oth_id6) Troubleshooting This error message only appears if on the first gas request on program start the flame was detected (response from ionization electrode present) and then was lost (no response from the ionization electrode). The error message refers to the lower burner on 20.x pedestal units. Prerequisite and troubleshooting as for error message No gas (see 12.1 No gas (OTH_ID1), Page 71). 72 Service instructions

Gas faults and error messages 12.7 Communication fault between I/O and ignition electronics (OTH_ID25) Troubleshooting There is a communication fault between the control board and ignition electronics. Remove the left side wall. Unlatch and open the operating panel. Look for the following causes. CAN bus cable between control board, connector X4 and ignition electronics defective. Ignition electronics defective. Control board defective. Troubleshoot in the indicated order. 12.8 Communication fault between I/O and ignition electronics (top) (OTH_ID26) Troubleshooting There is a communication fault between the control board and ignition electronics for the upper burner. Remove the left side wall. Unlatch and open the operating panel. Look for the following causes. CAN bus cable between control board, connector X4 and ignition electronics defective. Ignition electronics defective. Control board defective. Troubleshoot in the indicated order. 12.9 Communication fault between I/O and ignition electronics (bottom) (OTH_ID27) Troubleshooting There is a communication fault between the control board and ignition electronics for the lower burner. Remove the left side wall. Unlatch and open the operating panel. Look for the following causes. CAN bus cable between control board, connector X3 and ignition electronics defective. Ignition electronics defective. Control board defective. Troubleshoot in the indicated order. Service instructions 73

Gas faults and error messages 12.10 Checking the connection pressure a Preparations De-energize appliance. Block customer-supplied gas supply. Remove the left side wall. Unscrew the sealing screw (a) of the pressure measurement nozzle on the gas magnetic valve. Connect the gas pressure measurement device. Switch on digital measurement device before connecting! Measuring gas pressure Switch on customer-supplied gas supply again. Overview of connection pressure Switch on appliance and operate under full load. Measure connection pressure. Gas type Connection pressure Range of connection pressure Natural gas E,LL 20 mbar 15.0 25 mbar Liquid gas B, P 50 mbar 15.0 57.5 mbar 74 Service instructions

Gas faults and error messages 12.11 Checking the gas magnetic valve and gas heat exchanger a Preparations De-energize appliance. Block customer-supplied gas supply. Remove the left side wall. Unscrew the sealing screw (a) of the pressure measurement nozzle (OUT) on the gas magnetic valve. Connect the gas pressure measurement device. Switch on digital measurement device before connecting! The precision of the magnetic valve should be at least 0.1 mbar. Checking the magnetic valve Leak tightness check gas heat exchanger Switch on customer-supplied gas supply again. Switch on appliance and operate under full load. Measure gas pressure. When the gas blower start up and the gas magnetic valve is not yet activated, an underpressure of approx. 3 mbar must be set. After opening of the gas magnetic valve by the ignition electronics, the underpressure is reduced to < 0.5 mbar. If the underpressure should remain unchanged at approx. 3 mbar, the gas magnetic valve or the ignition electronics are defective. When the gas blower start up and the gas magnetic valve is not yet activated, an underpressure of approx. 3 mbar must be set. If no underpressure should be generated, there is a leak in the gas heat exchanger or in the connection length. Service instructions 75

Gas faults and error messages 12.12 Checking the electrodes Preparations Remove the left side wall. Overview a b c d 3 µa 10 5 X1 6 1 N 24-28V, ~1,4A 230V 230V F1 3,15A a Ignition electronics A10 / A20 c Ionization electrode (flame monitoring) B100 / B200 b Transformer T10 / T20 d Glow electrode F10 / F20 12.12.1 Glow electrode Preparations On the Service menu, select the Gas CO 2 calibration and start. Only begin troubleshooting when Gas request lights up green. INFORMATION The transformer (b) is only supplied with voltage with active gas request. The glow electrode can be checked visually through the sight glass on the gas burner. Troubleshooting Check output voltage on the transformer. The voltage is 24 V. Check the current consumption of the glow electrode. This must be at least 1.4 A. Check fuse F1 on the transformer. The fuse has blown. Replace fuse. Repeat test and replace glow electrode if necessary. Check supply voltage at the transformer. No voltage present = Check neutral conductor. Replace transformer. Voltage present = Replace ignition electronics. 76 Service instructions