„Gas Touch“ Built-in Gas Hobs with Electronic Control and Touch User Interface ESSE-N / A.S.
General Features built-in „gas-on-glass“ hob, 73 x 51 cm tempered glass surface (8 mm thickness) standard Electrolux components: 4 gas burners: 1 rapid / 2 semirapid / 1 auxiliary ignition unit (spark generator) spark plugs flame detector thermocouples 2
General Features Electronic control system (supplier: SIT) Power board Touch-control user interface L.H. user interface controlling 2 L.H. burners R.H. user interface consisting of: user interface controlling 2 R.H.
Safety Features Child lock Automatic shut-off : time-controlled temperature-controlled 4
Battery Kit A kit with a rechargeable battery will be available as a service part, to be fitted in areas with power supply problems The battery offers a backup power supply to bridge a short mains power failure 5
Brands / Models / Countries EHS 740 K pnc 949 750 638 ES cat. II2H3+ EHS 742 K pnc 949 750 637 GB, IE cat. II2H3+ EHS 746 K pnc 949 750 639 HU cat. II2HS3B/P EHS 746 K pnc 949 750 640 CZ, HR, cat. II2H3+ SI, SK EHS 74 K pnc 949 750 641 SE, TR cat.
Brands / Models / Countries 79900 G-m pnc 949 750 626 IT, PT cat. II2H3+ 79901 G-m pnc 949 750 628 FR cat. II2E+3+ 79902 G-m pnc 949 750 629 BE cat. II2E+3+ 79903 G-m pnc 949 750 627 GB, IE cat. II2H3+ 79904 G-m pnc 949 750 631 NL cat. II2L3B/P 79905 G-m pnc 949 750 630 DK, NO cat.
Brands / Models / Countries ZGG 742 EX pnc 949 750 636 GB, IE cat. II2H3+ ZGG 743 EX pnc 949 750 647 BE cat.
Brands / Models / Countries TGE 7096 N pnc 949 750 634 FR cat.
Brands / Models / Countries PVN 74 XE pnc 949 750 632 IT cat.
Aesthetics AEG-Electrolux 11
Aesthetics : Electrolux, Zanussi, Rex-Electrolux 12
Aesthetics : Arthur Martin Electrolux 13
Countries / Gas Categories II2H3+ Countries: CZ, ES, GB, HR, IE, IT, PT, SI, SK 2H Æ G20 at 20 mbar 3+ Æ G30 at 28-30 mbar or G31 at 37 mbar 14
Countries / Gas Categories II2E+3+ Countries: BE, FR 2E+ Æ G20 at 20 mbar or G25 at 25 mbar 3+ Æ G30 at 28-30 mbar or G31 at 37 mbar 15
Countries / Gas Categories II2H3B/P Countries: SE, NO, DK, TR 2H Æ G20 at 20 mbar 3B/P Æ G30 or G31 at 30 mbar 16
Countries / Gas Categories II2L3B/P Countries: NL 2L Æ G25 at 25 mbar 3B/P Æ G30 or G31 at 30 mbar 17
Countries / Gas Categories II2HS3B/P Countries: HU 2HS Æ G20 at 25 mbar or G25.
Test Gasses for Normal Operation Gasses indicated on rating labels and in specifications are test gasses for normal operation in accordance with EN 437 2nd Family : natural gas Group H: G20 = CH4 100% Group L: G25 = CH4 86% + N2 14% Group S: G25.
Gasses CH4 methane n-C4H10 butane i-C4H10 isobutane C3H8 propane CO2 carbon dioxide N2 nitrogen 20
Hob Top 21
Component Layout Main Shutoff Valve Mains Terminal Box Ignition Unit Spark Plugs Main Control & Power Board Modulation Valves L.H. User Interface R.H. User Interface: ON / OFF + Timer Main Earth Thermocouples R.H.
Schematic Layout 23
Gas Touch Wiring 1 With EMC Filter 24
Gas Touch Wiring 2 Without EMC Filter 25
Gas Touch Wiring Initial production wiring will have an EMC filter between terminal box and main board Main board will be modified by mid-2005 for RoHS compliance; this modified board will also comply with EMC regulations without the need of a filter (to be confirmed) The allowed leak current will not be exceeded if this board is used as service replacement on an older hob having the filter 26
Gas Control Schematic 27
Power Board to igniter to main shut-off valve 2x white to modulation valves 2x white: shut-off valve 5x grey: linear step motor to thermocouples from mains power supply to user interface serial PC interface (not used in service) 28
User Interface L.H.
User Interface R.H.
Main Shut-off Valve SOLENOID VALVE TERMINALS GAS OUTLET SOLENOID 12 Vdc 60 ohms (at 20°C) GAS INLET 31
Modulation Valve MODULATOR CONNECTOR SOLENOID VALVE TERMINALS SOLENOID 12 Vdc / 87 ohms LINEAR STEP ACTUATOR 12 Vdc 158 ohms per phase GAS OUTLET GAS INLET 32
Modulation Valve SHUT-OFF VALVE LINEAR STEP ACTUATOR 33
Step Motor 34
Characteristic of Step Actuator Natural Gas 20 mbar 35
Characteristic of Step Actuator LPG 37 mbar 36
Flame Modulation The flame can be set in 6 levels At maximum level, the valve is always fully open The other 5 flame levels are defined for each type of gas by a so-called map stored in the EEPROM This map is a set of 5 step values for the step motor 37
Electrolux Burners Burner Body Ignition Main nozzle in primary air chamber Safety thermocouple 38
Electrolux Burners Burner Crown Burner Body Burner Lid Safety thermocouple 39
Electrolux Burners Primary air from above, not adjustable 40
Burners Variants 41
Burners Variants 42
Electrolux Burners Burner type natural gas (H/L) 20 mbar LPG 30 mbar LPG 50 mbar Wok rapid semirapid auxiliary main nozzle H [x 0.01 mm] 146 119 96 70 DKK: main nozzle L [x 0.01 mm] 150 133 106 74 ZO: main nozzle LL [x 0.01 mm] 153 133 106 74 DKK: by-pass nozzle [x 0.01 mm] 44 39 30 25 ZO: by-pass nozzle [x 0.01 mm] 56 40 32 28 ON APPLIANCES ADJUSTABLE TO LPG 30m b ZO: by-pass nozzle [x 0.01 mm] 45 35 28 23 ON APPLIANCES ADJUSTABLE TO LPG 50m b DKK: max.
Installation : Dimensions 44
Installation : Dimensions 45
Installation : Ventilation or 46
Installation : Electrical Connection Cable fitted to appliance : H05 V2V2-F (T90) 3x0.
Installation : Connect to Power Supply An initialization procedure is started after connecting the appliance to the power supply (or after a power reset) All LEDs will illuminate for some seconds, then extinguish again The hob can be switched on now 48
Operation : Switch On Hob Touch the main ON/OFF control for about 3 seconds The power control LED will illuminate, a long beep will sound The hob is ready for use now If no other control is activated within 30 seconds, the hob will be switched off automatically 49
Operation : Switch On Burner Touch the Ignition control of the required burner The 2 outer LEDs of the flame level indicator, and the residual heat LED, will illuminate Within 3 seconds, touch either the Flame Increase or the Flame Decrease Control of that burner 50
Operation : Ignite Burner - High Flame Level If the Flame Increase control is used, the burner will ignite at maximum flame level All 6 flame level LEDs illuminate The power board controls the respective modulation valve, fully opening the gas supply to the burner The ignition device is activated for about 6 seconds 51
Operation : Ignite Burner - Low Flame Level If the Flame Decrease control is used, the burner will ignite at medium flame level 3 flame level LEDs illuminate The power board controls the respective modulation valve, opening the gas supply to the burner The ignition device is activated for about 6 seconds 52
Operation : Select Flame Level By further touching either the Flame Increase or the Flame Decrease control, the flame level can be adjusted as required The flame level LEDs will show the setting 53
Operation : Select Flame Level N.
Operation : Ignition of Several Burners If ignition is selected for more than 1 burner, these will be ignited sequentially, i.e.
Operation : Switch Off Burner To switch of one burner, touch the repective Ignition Control 56
Operation : Residual Heat Indicator After switching off the burner, the respective residual heat indicator LED will stay on for about 40 minutes (only timecontrolled) The LED will not light up again after a power reset, even if the burner is still hot 57
Operation : Switch Off Hob To switch off the hob, i.e.
Operation : Lock (Child Lock) Hob is switched OFF Touch Lock control for about 3 seconds, until the associated LED illuminates, and a long beep is heard To switch on the hob, the child lock must be de-activated first, by touching the Lock control again, until LED extinguishes, and long a long beep is heard 59
Operation : Lock (Function Lock) Hob is switched ON, at least one burner functioning Touch Lock control for about 3 seconds, until the associated LED illuminates, and a long beep is heard Flame setting can‘t be changed, only the OFF control is active To de-activate the lock, touch the Lock control again until LED extinguishes and a long beep is heard, or switch off the hob 60
Ignition Failure Spark generator will attempt ignition for about 6 seconds If ignition is not successful, the gas supply to this burner is interrupted for 3 seconds, after which sparks are again generated for 6 seconds If ignition fails after 3 attempts, the burner will go into safety mode The selected segments of the flame level indicator will flash Fault “01” is shown flashing in timer display for the respective burner (if timer is switched on) 61
Automatic Reignition If the flame is accidentally extinguished, this is detected by the thermocouple, and the main board will close the respective shut-off valve to interrupt the gas flow After 20 seconds, the gas flow is opened again, and the ignition procedure is restarted After 3 unsuccessful attempts, the burner will go into safety mode The selected segments of the flame level indicator and the residual heat indicator will flash Fault “01” is shown flashing in timer display for the re
Overheating If the NTC sensor on the main board detects a temperature of 95°C, all functioning burners are switched to minimum flame level If temperature continues to increase, reaching 105°C, the hob is switched off completely, and goes into safety mode Fault “09” is shown flashing in the timer display for all burners (if timer is switched on) 63
Burner Safety Switch Off Any burner will be automatically switched off after 4 hours from the last user intervention (e.g.
Operation : Safety Mode Reset When a safety mode is set on one or more burners, the respective controls cannot be operated for about 60 seconds After this, the burner (or the hob), can be reactivated by simultaneously touching the Flame Increase and the Flame Decrease controls 65
Operation : Switch-off Timer Ignite the required burners If more burners are operating, the switch-off timer can be set for one of them only Repeatedly touch the Timer control, until the LED corresponding to the desired burners illuminates 66
Operation : Switch-off Timer Set the time (up to 99 minutes) by using the Time Increase or Time Decrease controls Countdown will start immediately Countdown of the last minute is in seconds, last 10 secs accompanied by beeps Repeated beeps after switch off - touch Timer control to cancel 67
Operation : Minute Minder If the timer is set when none of the burners are operating, it will act as a minute minder 68
Conversion to Another Gas Change the main nozzle using a 7 mm socket spanner 69
Single Nozzles Marking / Spare Part Numbers auxiliary burner semirapid burner rapid burner natural gas H 20 mbar 70 354 400 413 / 2 96 354 400 412 / 4 119 354 400 404 / 1 natural gas L 25 mbar (NL) 71 354 400 436 / 3 100 354 400 435 / 5 124 354 400 434 / 8 LPG 28-30/37 mbar 50 354 400 071 / 8 71 354 400 036 / 1 86 354 400 432 / 2 70
Kits The following kits can be used for conversion or retrofit: for natural gas H, 20 mbar: 5026 73 42-00 / 9: 1 x 0.70; 2 x 0.96; 2 x 1.19 5027 36 08-00 / 5: 1 x 0.70; 3 x 0.96; 1 x 1.19; 1 x 1.46*; 1 x 1.13** for natural gas L, 25 mbar (NL): 5026 45 43-00 / 5: 1 x 0.71; 3 x 1.00; 1 x 1.24; 1 x 1.33* for LPG, 28-30 / 37 mbar: 5027 36 09-00 / 3: 1 x 0.50; 3 x 0.71; 1 x 0.86; 1 x 0.98* 5026 94 49-00 / 0: 1 x 0.50; 2 x 0.71; 1 x 0.86; 1 x 0.
Setting the Gas Type After changing the nozzles, the gas type must be set in the main board To do this, switch on the hob Switch on the timer and set it to the auxiliary burner (front left) 72
Setting the Gas Type Using the Time Increase control, set timer to 99 73
Setting the Gas Type Using the Time Decrease control, set timer to 80 (or below) 74
Setting the Gas Type Using the Time Increase control, set timer to 83 75
Setting the Gas Type The timer display will now show the current setting, usually „n0“ (factory setting) If required, change the setting in accordance with instructions If „n2“ is not defined for the respective model, the hob will not work with this setting (eventually showing fault „01“) 76
Minimum Flame Adjustment If the flame aspect and the flame stability are not satisfactory, carry out the procedure of „Setting the Gas Type“, until the setting is shown Ignite the burner to be adjusted - an automatic adjustment will be carried out, in the course of which the burner may repeatedly extinguish an re-ignite During this sequence, a manual adjustment can be done by using the Flame Increase or Flame Decrease controls 77
Flame Adjustment If the minimum flame level (step 1) is manually adjusted, this means that the step value for level 1 is changed The step values for levels 2 to 5 will be shifted accordingly Level 6 remains unchanged (fully open), the flame level being determined only by the inlet pressure and by the size of the nozzle 78
Fault Codes If a fault condition occurs on one burner, this will be shown by flashing flame level LEDs and residual heat LED (N.B.
Fault Codes Faults are marked B or S on the following slides B faults affect only individual burners: the affected burner goes into safety mode the fault code is shown in the timer display only when the timer is set to the respective burner the system, and the other burners, remain operative S faults affect the whole system the system, and all burners, are locked the fault code is shown in the timer display for all burners 80
Fault Codes Possible Causes 00 - 0I B No flame after retry No error Absence of spark Absence of gas supply Incorrect spark Wrong position of burner cap Wrong position of thermocouple Wrong connection of thermocouple Main shut-off valve faulty Burner shut-off valve faulty Wrong gas setting Main board faulty 81
Fault Codes Possible Causes 02 B Solenoid valve feedback fault Wiring to burner shut-off valve faulty Burner shut-off valve faulty Main board faulty 82
Fault Codes Possible Causes 03 04 05 06 07 B Step motor phase 1 fault B Step motor phase 2 fault B Step motor phase 3 fault B Step motor phase 4 fault B Step motor enable fault For all above: Wiring to step motor faulty Step motor faulty Main board faulty 83
Fault Codes Possible Causes 08 B Generic fault 09 Main board faulty S Temperature out of range NTC on main board detects temperature > 105°C Overheating - wait for cool down (if frequent, check for causes, e.g.
Fault Codes Possible Causes I0 B Continuous run timeout Timeout exceeded (burner on for more than 4 hours without any user intervention) No fault (normal safety function) II S Power supply Vpp fault Fault in 12.8 V supply on main board I2 S Power supply Vdd fault Fault in 3.
Fault Codes Possible Causes I3 - Power supply battery Battery discharged or missing (Only when battery backup kit is installed !) I4 B Abnormal thermocouple condition Parasite flame detected by thermocouple Thermocouple faulty Thermocouple wiring faulty Main board faulty 86
Fault Codes Possible Causes I5 S System locked, fatal fault I6 S NTC sensor fault NTC value out of working range (broken / short circuit) I7 S Time base ratio fault (time slot monitoring) I8 S AD converter fault I9 S Data memory fault 20 S Program memory fault / configuration bit fault 87
Fault Codes Possible Causes 2I S EEPROM memory fault 22 S EEPROM data out of range 23 S Software watchdog fault (time slot monitoring) 24 S Logical monitoring tracing fault all above (15 to 24): Main board faulty 30 S Uninstalled burner 88
Faulty PCB In case a fault of the electronic control is suspected, knowledge of the signal flow between the boards will be helpful to detect the faulty board Communication between the main board and each of the two user interface board is detailed on next slide 89
Communication PB - UI R.H. User Interface Main On/Off Timer Lock L.H.
Service Manual Soon in TDS: Service Manual Publ. No.
