OVC OVC2000. New Family of Electronic Oven Controls

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Hugh Nelson
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1 OVC OVC2000 New Family of Electronic Oven Controls

2 OVC OVC2000 OVC = new family of power boards for electronic OVen Controls, developed in Rothenburg 2 levels of complexity (denomination aligned with other product areas) : OVC1000 for mid-range ovens OVC2000 for multi-function high-range ovens 2

3 OVC OVC2000 OVC1000 and OVC2000 meet the provisions of the RoHS Directive will replace older generation power boards from the different platforms/factories in the course of the first half of the year 2005 will further serve as basis for new applications Prisma High in the Century 2 Platform will be modified to meet the provisions of the RoHS Directive, and can be used beyond 2005 in DGT (brands Electrolux, Husqvarna, Juno, Küpperbusch) and FFS (AME = Arthur Martin Electrolux) 3

4 RoHS Directive Directive 2002/95/EC of the European Parliament and Council on the Restriction of the Use of Certain Hazardous Substances (RoHS), bans lead (Pb), mercury (Hg), cadmium (Cd), hexavalent chromium (Cr 6+ ), as well as flame retardants containing polybrominated biphenyls (PBBs) or polybrominated diphenyl ethers (PBDEs) The Directive will be effective 1 st July 2006 Electrolux commited itself to meet the provisions of this Directive by mid-2005 to cater for logistic lead times 4

5 OVC OVC2000 as Replacement OVC1000 will replace: DGT: SOEC in AEG Electrolux with Rhea UI Prisma Basic in Century 2 FFS: Prisma Basic in Century 2 AME ZO: SOEC in Access ovens with Kronos 2 / 3 UI OVC2000 will replace: DGT: Prisma High in AEG Electrolux Perfect 2 Prisma High in Frontline ovens (DKK DGT) SC: Prisma High in steam ovens GBJ: Prisma High in double-cavity ovens 5

6 OVC OVC2000 New Applications OVC1000 DGT / FFS: OVC2000 DGT: DGT / FFS: combination with new variants of Rhea UI for pyrolytic ovens AEG Electrolux Avantgarde combination with new variants of Rhea UI, supporting meat probe GBJ / DKK / MO: new range of single & double cavity FS cookers for UK & Scandinavia Other applications to follow 6

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8 OVC OVC2000 System Definition OVC1000 & OVC2000 will be pre-programmed by the supplier with the basic software In principle, a single variant of each power board could cover all applications In practice this will apply to OVC1000; for OVC2000, not all applications need the fullyequipped PB; 2 hardware versions will be used by the factories (handling of spares to be defined) Variant definition software will be located on the respective user interfaces, and will programmed in the factories (procedure for spares programming to be defined) 8

9 OVC1000 Inputs User interface (oven function, temperature, timer signals) PT500 cavity temperature sensor Door switch (controls cavity light and cooking fan) Telescopic runner switch Door lock signal No meat probe for safety reasons, because small loads are controlled by triacs 9

10 OVC1000 Load Control 5 relays (2 x 6 A, 3 x 16 A), of which: 4 control the individual heating elements (top & bottom 6 A each, grill & rear/ring 16 A each) 1 is the APD (all-pole disconnect) relay, 16 A 5 triacs control small loads: cavity light cooking fan cooling fan low speed cooling fan high speed door lock Contact a7-2, mechanically linked to function selector, can be used to control a turn spit (French market) 10

11 OVC1000: Circuit 11

12 Cooling Fan Speed Control 12

13 Cooling Fan Speed Control Variants m2 R20 cooling fan series resistor by-passed during pyrolysis for higher fan speed 13

14 Cooling Fan Speed Control Variants 105 Ohm 20 Ohm Phase Neutral Neutral Pyrolyse Nomalbetrieb 3 Pyrolyse-Betrieb 2 Normalbetrieb 1 OR: higher fan speed obtained by field tapping!! Wrong connection possible!! 20 Ω winding can be destroyed if 1 and 2 inverted low speed during pyro cycle if 2 and 3 inverted overheating 14

15 Cavity Temperature Sensor Pt500 Resistance (Ω) Temperature ( C) 15

16 Overheat Protection on Ventilation Channel Thermal protector (130 C on pyrolytic models, 90 C on others) disconnects the heating elements in case of overheating 16

17 Door Lock Door microswitch controls cavity light and fan (some models without pyrolysis have only this switch fitted on an empty door lock housing) 17

18 Door Lock Function Door lock at 312 C Unlock voltage signal from power board generated when sensor temperature is below 204 C For safety reasons, fixed thermostat (110 C) on rear component plate must be closed too for unlock 18

19 Door Lock 2 - Unlock input 3 - Phase 230 V 4 - Lock input 33/34 - Sensing contact 5 V, 100 ma 19

20 OVC1000: Layout 20

OVC1000 Doorlook system (rast 2,5 pro): - control - feedback door closed Small loads (rast 2,5 pro): - oven light - cooking fan - cooling fan 1. speed - cooling fan 2.

21 OVC1000 Doorlook system (rast 2,5 pro): - control - feedback door closed Small loads (rast 2,5 pro): - oven light - cooking fan - cooling fan 1. speed - cooling fan 2. Speed heaters (Rast 5): - Grill element - Top element - Bottom element - Ring element Power supply (Rast 5): - L/N/PE 230V/50Hz All pole disconnetion (Rast 5): factory programming: User interface (Rast 2,5): - Rhea - Kronos 2 - Kronos 3 analog input (Rast 2,5): for future applications digital input (Rast 2,5): - door switch for light - telescopic runners detection PT500 (Rast 2,5): 21

22 OVC Rhea UI Brands & Variants Functions temperature proposal heating indication pyrolytic cleaning control full timer functions push button for additional function (e.g. FHU or actual temperature) 22

OVC1000 + Kronos 2 Variants Functions temperature proposal heating indication heating mode indication steam

23 OVC Kronos 2 Variants Functions temperature proposal heating indication heating mode indication steam control microwave control pyrolytic cleaning control full timer functions FHU (fast heat-up) programs / memory 23

OVC1000 + Kronos 3 Brands & Variants Functions 2 displays (2-colour & red) text display (selectable language) temperature proposal heating indication

24 OVC Kronos 3 Brands & Variants Functions 2 displays (2-colour & red) text display (selectable language) temperature proposal heating indication heating mode indication steam control microwave control pyrolytic cleaning control full timer functions FHU, actual temperature indication programs / memory 24

25 OVC2000 Inputs User interface via MACS (oven function, temperature, timer signals, cooking programme, meat probe temperature) PT500 cavity temperature sensor(s*) Meat probe(s*) Door switch(es*) Telescopic runner switch(es*) Door lock signal(s*) *N.B. OVC2000 supports double-cavity ovens On built-under ovens also MACS communication hob control power board (HOC2000) 25

26 OVC2000 Load Control Heating Elements All loads controlled by relays (meat probe safety) Fully-equipped configuration with 17 relays 5 relays for main cavity: 2 x 6 A for top & bottom heating elements 2 x 16 A for grill & rear heating elements 1 x 16 A APD relay 4 relays for second cavity: 2 x 6 A for top & bottom heating elements (alternatively for steam drawer elements) 1 x 16 A for grill heating element 1 x 16 A APD relay 26

27 OVC2000 Load Control A maximum of 8 x 6 A relays control small loads: 2 relays for door locks 6 relays for different combinations of loads (see diagram): cavity light(s) cooking fan(s) cooling fan low speed cooling fan high speed turn spit 27

28 Circuit OVC

29 Circuit OVC2000 Small Load Configuration Variants 29

30 Cooling Fan Speed Control with Single Relay m2 R20 cooling fan series resistor by-passed during pyrolysis by fixed NO thermostat (90 C) 30

31 Layout OVC

32 OVC2000 Fully-equipped Version 32

OVC2000 + Rhea UI Brands & Variants Functions temperature proposal heating indication pyrolitic cleaning

33 OVC Rhea UI Brands & Variants Functions temperature proposal heating indication pyrolitic cleaning control full timer functions push button for additional function (e.g. FHU or actual temperature) meat probe 33

34 OVC OVC2000 Alarm Management Alarms are shown directly on the user interface (no alarm memory) There are minor differences between alarm management on OVC1000 vs. OVC2000 But it will be the same on all user interfaces (Kronos, Rhea, Perfect 2, or Avantgarde), therefore the alarms are shown here, and not in the individual product platforms No protection or alarm against wrong connection to 400 V 34

35 OVC1000 Alarms F1 F2 F3 F4 F5 fault in door-lock sensing circuit door can t be locked or unlocked (first check if door closed, then reset mains supply) software error on UI EEPROM cavity temperature sensor outside of working range (alarm will be shown after a 5 sec delay) cavity temperature too high for more than 12.5 sec (400 C normal heating mode, 530 C pyrolysis) F8 F9 F10 communication error between PB and UI incompatibility between PB and UI faulty triac on OVC

36 OVC2000 Alarms F1 F2 F3 F4 F5 F6 F8 F9 fault in door-lock sensing circuit door can t be locked or unlocked (first check if door closed, then reset mains supply) software error on UI EEPROM cavity temperature sensor outside of working range (cooling fan runs for 20 min before alarm is shown) cavity temperature too high for more than 12.5 sec (400 C normal heating mode, 530 C pyrolysis) NTC sensor on PB outside of working range (cooling fan runs for 20 min before alarm is shown) communication error between PB and UI incompatibility between PB and UI F11 meat probe short circuit (or not correctly plugged) 36

Compact Range ESSE-N / A.S. April 2005

Compact Range ESSE-N / A.S. April 2005 Compact Range General Features Compact range newly developed in Schwanden factory Built-in appliances for niche of 380 mm height Several drawers will be available