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Revision 4/F3544

Convection Oven

© Moffat Ltd, April 2005

8.2 COOK TOP (HOB)

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Summary of Contents for E9311

Page 1: ... 1 Revision 4 F3544 Convection Oven Moffat Ltd April 2005 E9311 CONVECTION OVEN RANGE SERVICE MANUAL ...

Page 2: ... 2 Revision 4 F3544 Convection Oven Moffat Ltd April 2005 WARNING ALL INSTALLATION AND SERVICE REPAIR WORK MUST BE CARRIED OUT BY QUALIFIED PERSONS ONLY ...

Page 3: ...ill result SECTION PAGE NO 1 SPECIFICATIONS 5 2 INSTALLATION 7 3 OPERATION 9 3 1 Oven 3 2 Hob 3 3 Explanation of Control System 4 MAINTENANCE 13 4 1 Cleaning 4 2 Routine Procedures 5 TROUBLE SHOOTING GUIDE 15 5 1 Oven 5 2 Hob 6 SERVICE PROCEDURES 19 6 1 Fault Diagnosis 6 2 Access 6 3 Replacement 6 4 Adjustment Calibration 7 ELECTRICAL SCHEMATICS 36 8 ELECTRICAL WIRING DIAGRAMS 38 8 1 Oven 8 2 Hob ...

Page 4: ... 4 Revision 4 F3544 Convection Oven Moffat Ltd April 2005 ...

Page 5: ...1 SPECIFICATIONS MODEL E9311 LEGEND Electrical connection entry point Dimensions shown in millimetres Dimensions in inches shown in brackets FRONT PLAN SIDE E 1 1 E 796 5 ELECTRICAL ENTRY 90 ELECTRICAL ENTRY E 1 120 1 E 600 190 890 960 45 56 5 210 765 E 1 1 E ...

Page 6: ... 3 5 ft OVEN RACK SIZE Width 536 mm 21 Depth 370 mm 14 5 ELECTRICAL SUPPLY SPECIFICATION Oven 230 240 V AC 50 Hz 13 0 A 3 1kW 240 V Hob 230 240 V AC 50 Hz 27 0 A 6 5kW 240 V ELECTRICAL PLUG SPECIFICATION REQUIREMENTS OVEN Australia 3 pin 250V 15A AS NZ 3112 Canada 3 pin 250V 15A NEMA 6 15 New Zealand 3 pin 250V 15A AS NZ 3112 United Kingdom 3 pin 250V 13A fused BS 1363A United States 3 pin 250V 15...

Page 7: ...or handle to oven door Check that the available power supply is correct to that shown on the rating plate located on the right hand side panel figure 2 3 Oven 230 240 V AC 50 Hz 13 0 A 3 1kW 240 V Hob 230 240 V AC 50 Hz 13 0 A 6 5kW 240 V 2 INSTALLATION IMPORTANT THE OVEN VENT LOCATED ON THE CABINET TOP MUST NEVER BE OBSTRUCTED WARNING THIS APPLIANCE MUST BE GROUNDED LOCATION To ensure correct ven...

Page 8: ...cket through the slot on the door side 5 Screw in the two screws item 2 fully then fully screw in the previous two screws item 3 Ensure that they are tight Figure 2 2 Oven Rating Plate Figure 2 3 RATING PLATE LOCATION The rating plate for the oven is located at the bottom left corner of the RH side panel The rating plate for the hob is located on the left side of the hob back panel Hob Rating Plat...

Page 9: ...lluminate whenever the elements are on 3 BAKE TIMER 1 Hour bake timer Indicator illuminates when time up 0 reached and buzzer sounds 4 ROAST N HOLD Depress switch to activate ROAST N HOLD function Switch illuminates when ON 5 ROAST TIMER 3 Hour roast timer Indicator illuminates when time up 0 reached and product held at 75 C 167 F 6 LIGHT SWITCH Push switch to activate oven light Light illuminates...

Page 10: ...OOKING VESSELS ON CONTROL AREA 1 2 Convex base heat loss Concave base heat loss Wet base corrosion Too small corrosion heat loss Flat heavy duty base DISC ELEMENTS Before using for the first time heat the ele ment on HI for three minutes This will pro duce some smoke which will soon disappear With continued use the red spot and stainless steel trim ring may discolour This is a natural result of he...

Page 11: ...l block at the rear of the unit Although the power relay has two poles with changeover contacts only the normally closed contact on one pole is used the other is redundant When the power switch on the control panel is switched on the power relay is energised and the normally open contact is closed providing power to the temperature control circuit The temperature control of this oven is with a cap...

Page 12: ...en the 3 hour timer has run down and reached the Hold position the two switch contacts change over to their normally closed position which isolates power from the timer motor and the oven thermostat It also switches power back to the oven hold thermostat At this point the temperature control is now maintained by the hold thermostat as previously described To cancel the hold circuit the Roast and H...

Page 13: ...t terminal plate and secure in place with the oven lamp glass 4 MAINTENANCE OVEN SEALS To remove hold at their centre point and pull forward until they unclip Remove side seals first then top and bottom The seals may be washed in the sink but take care not to cut or damage them To replace ensure that the lip is facing the oven opening Fit the top and bottom seals first then the side seals OVEN DOO...

Page 14: ...PROCEDURE INTERVAL DOOR SEALS Check for deterioration 12 months DOOR PIVOT BUSHES Check for wear 12 months DOOR CATCH Ensure that catch is adjusted such that the door closes properly 12 months ELEMENTS Check that element resistances are correct to their rating refer 6 3 11 12 months ...

Page 15: ...diagnosis 6 1 2 Fan motor faulty Refer fault diagnosis 6 1 2 Wiring Close door Adjust Refer service section 6 4 2 Replace Refer service section 6 3 2 Replace Refer service section 6 3 15 Check for any loose wiring OVEN LIGHT NOT ILLUMINATING DOOR OPEN OVEN LIGHT NOT ILLUMINATING DOOR CLOSED Blown bulb No power to light Refer fault diagnosis 6 1 3 Blown bulb Light switch faulty Refer fault diagnosi...

Page 16: ...8 Replace Refer service section 6 3 9 SLOW RECOVERY Oven in Roast n Hold mode Overloading of oven Electrical supply incorrect Fan not working Thermostat calibration Refer fault diagnosis 6 1 9 Element s not working Switch off Roast n Hold Reduce oven loading Check supply voltage is as per rating plate voltage Check fan operation Correct calibration Refer service section 6 4 1 Correct element fault...

Page 17: ...diagnosis 6 1 17 Replace Refer service section 6 3 3 Replace Refer service section 6 3 8 Adjust to correct temperature Refer service section 6 4 4 Replace Refer service section 6 3 10 DOOR DOES NOT CLOSE Tray in way of door Door seal obstruction Door handle installed incorrectly Door ball catch setting incorrect Door pivot bushes pins worn Correctly position tray in rack Correctly install door sea...

Page 18: ...ORK Energy regulator faulty Refer fault diagnosis 6 1 19 Element failed Refer fault diagnosis 6 1 18 Replace energy regulator Refer service section 6 3 23 Replace element Refer service section 6 3 22 NO INDICATOR LIGHT Faulty indicator Energy regulator faulty Refer fault diagnosis 6 1 19 Replace Refer service section 6 3 24 Replace Refer service section 6 3 23 NO HEAT CONTROL Energy regulator faul...

Page 19: ...Time Down 24 6 1 16 No Hold Indicator 24 6 1 17 Holding Temperature Incorrect 25 6 1 18 Hob Element Does Not Work 25 6 1 19 Hob Heat Not Controlled Correctly 25 6 2 ACCESS 26 6 2 1 Control Panel 26 6 2 2 Service Panel Rear Panel 26 6 2 3 Baffle 26 6 2 4 Control Panel Rear 26 6 2 5 Hob Cook Top 27 6 2 6 Hob Base Panel 27 6 3 REPLACEMENT 27 6 3 1 Light Bulb Glass 27 6 3 2 Door Microswitch 27 6 3 3 I...

Page 20: ...6 3 20 Door Pivot Bushes 32 6 3 21 Cook Top Fuses 32 6 3 22 Hob Elements 33 6 3 23 Hob Energy Regulators 33 6 3 24 Hob Indicator Light 33 6 3 25 Hob Centre Securing Stud 33 6 4 ADJUSTMENT CALIBRATION 34 6 4 1 Thermostat Calibration 34 6 4 2 Door Microswitch Adjustment 35 6 4 3 Door Alignment 35 6 4 4 Hold Temperature Adjustment 35 6 4 5 60 Minute Timer Zero Position Adjustment 35 ...

Page 21: ... microswitch is faulty replace Fan motor faulty Check the supply voltage across motor terminals If there is no voltage then check the electrical connections of supply wiring If voltage is correct then check the oven fan for free rotation Remove any obstruction If fan is free to spin and the voltage supply is correct then the motor is faulty replace 6 1 3 OVEN LIGHT NOT ILLUMINATING DOOR OPEN No po...

Page 22: ... at terminal 4 then the relay is faulty replace If there is voltage at terminal 4 then check the hold relay and the thermostat refer below 6 1 9 NO HEAT Power relay faulty From S N 232054 Check voltage to terminal 7 on power relay on rear panel of oven If there is no voltage then check wiring to the relay Hold mini contactor faulty to S N 232053 Check voltage to terminal 1 on oven thermostat If th...

Page 23: ...he element is faulty replace If there is no voltage check voltage is being supplied to the top element from terminal 2 on switch block mounted to front of thermostat If voltage is correct then check wiring NOTE Top outer element current draw 220 240V 3 5A 5 6 1 11 TOP ELEMENT NOT WORKING IN BAKE MODE NOT GRILL BROIL Indicator faulty Check the voltage across the indicator terminals If the voltage i...

Page 24: ...hould illuminate if operating correctly Timer faulty Check the voltage at terminal 3 of timer with timer in hold position If the voltage is correct then check wiring If there is no voltage then check voltage at terminal 1 of timer If there is voltage at 1 but no voltage at terminal 3 with timer in hold position then timer switch is faulty replace No power to timer Check the voltage at terminal 5 o...

Page 25: ...n terminal 3 power to element should be on continuously With control set to position 5 terminal 3 power to element should cycle on for approximately eight seconds and off for approximately 12 seconds Lower settings will give longer off times and shorter on times whilst higher settings will give shorter off times and longer on times 6 1 19 HOB HEAT NOT CONTROLLED CORRECTLY Element temperature limit...

Page 26: ...Panel is now free to hinge along right hand side When closing the panel ensure wires and capillary tube are clear of metal or other terminals Figure 6 2 1 Microswitch Button Two Screws 2 Remove panel Figure 6 2 2 Figure 6 2 3 3 Remove baffle Figure 6 2 4 6 2 4 CONTROL PANEL REAR Buzzer Power Switch Heating Indicator Grill Broil Indicator Thermostat Bake Time Up Indicator Roast n Hold Switch Hold R...

Page 27: ...l fitted Screw lamp cover into holder with baffle fitted do not over tighten Lamp Cover Figure 6 3 1 3 Transfer wires to new micro switch and re assemble 4 Adjust microswitch refer 6 4 2 Figure 6 3 2 1 Remove the nine screws securing the hob back panel to the unit 6 2 5 HOB COOK TOP 2 Remove both fuses 3 Remove the two screws securing the retaining clamp to the centre rear of the hob Hob Back Pane...

Page 28: ... new buzzer 5 Reassemble in reverse order Figure 6 3 6 Figure 6 3 7 2 From back push neon through front of panel rotating clockwise 3 Push new neon in from front of panel and reconnect wires 2 From back push switch through front of panel 3 Push new switch in from front of panel and reconnect wires Neon Wires Switch Wires Figure 6 3 3 Figure 6 3 4 3 Transfer wires to new timer 4 Withdraw old timer ...

Page 29: ...ce knob Two Screws Figure 6 3 9 7 Insert new thermostat 8 Re assemble in reverse order 3 Transfer wires to new thermostat 4 Remove service panel refer 6 2 2 and from inside of oven loosen two screws holding thermostat phial bracket Figure 6 3 10 Figure 6 3 11 Fibreglass Sleeve Thermostat Phial Figure 6 3 12 5 Withdraw old thermostat phial through rear of oven 6 Remove fibreglass sleeve from old th...

Page 30: ...and re assemble in reverse order 2 Replace and re assemble in reverse order Figure 6 3 18 Figure 6 3 17 Element Ratings 5 220 240V Top Inner Element 29 5 ohms Top Outer Element 66 5 ohms Bottom Element 27 3 ohms 6 3 12 MINI CONTACTOR TO S N 232053 1 Open control panel refer 6 2 1 and transfer wires from old mini contactor to new contactor 2 Remove two screws securing old mini contactor to control ...

Page 31: ...t and remove motor 4 Replace and re assemble in reverse order 5 Ensure wire connections are correct to the voltage supply 60 Hz 50 Hz fig 6 3 23 Figure 6 3 20 Three Screws Two Screws 4 Remove screws securing door handle Figure 6 3 22 Figure 6 3 21 LH Screw 5 Remove two screws in top trim and two screws in bottom trim of door and remove trim panels Screws Figure 6 3 23 6 Lift outer glass away from ...

Page 32: ...nd bottom seals first with open side of seal facing downwards Fit side seals with open side facing outwards Door Seals 6 3 20 DOOR PIVOT BUSHES 1 Remove door as per steps one to three of section 6 3 16 2 Door bushes can now be removed and replaced 3 Reinstall door by reversing steps one to three of section 6 3 16 Door Pivot Bush Figure 6 3 27 6 3 18 INNER GLASS SEAL 1 Remove the door inner glass r...

Page 33: ... Remove wires from element noting their positions refer electrical wiring diagram 8 2 3 Unscrew centre nut and remove element clamp 1 Remove hob refer 6 2 5 and hob base panel refer 6 2 6 2 Remove wires from back of indicator 3 From bottom push indicator through top of hob control panel rotating clockwise 4 Push new indicator in from top of panel and reconnect wires Element Clamp Figure 6 3 30 4 E...

Page 34: ...nel 9 Turn on power and recheck oven thermostat calibration 10 Repeat procedure if necessary Screws Grill Broil Switch Figure 6 4 4 Calibration Nut Figure 6 4 3 Thermostat Thermostat Shaft Grill Broil Switch IMPORTANT IF THE OVEN TEMPERATURE NEEDS TO BE INCREASED ENSURE THAT THE THERMOSTAT IS IN THE OFF POSITION BEFORE CARRYING OUT ADJUSTMENT IF OVEN TEMPERATURE NEEDS TO BE DECREASED ENSURE THERMO...

Page 35: ...ocknut and turn the slot using the tool supplied with the unit anticlockwise to increase roller height clockwise to decrease roller height Actuator Arm Figure 6 4 6 Locknut Figure 6 4 8 Two Hex Head Bolts Figure 6 4 7 6 4 4 HOLD TEMPERATURE ADJUSTMENT 1 The hold temperature of the oven can be adjusted by turning the hold thermostat dial to the desired hold temperature This dial is located inside t...

Page 36: ...RONT REAR LEFT 15A FUSE 15A FUSE RIGHT L 4 FAN OVEN MAX LOAD 3 1kW 1 LIGHT OVEN 13 Amps 240V A C 3 60Hz OUTER TOP INNER TOP 50Hz UP TIME B BUZZER TIMER 1Hr 1 2 3 5 4 6 SWITCH POWER N N E E L 3 1 4 2 TIMER 3Hr HEATING NC NO T STAT OVEN 2 1 LIGHT SWITCH DOOR SWITCH MICRO T STAT HOLD GRILL 5 6 P5 P6 HOLD 3 2 6 5 M 1 4 SWITCH HOLD 3 1 4 2 1 6 4 3 NO B POWER RELAY 9 7 A HOLD RELAY 3 NO 4 6 NC 1 B 9 7 A...

Page 37: ... 37 Revision 4 F3544 Convection Oven Moffat Ltd April 2005 To Serial Number 232053 ...

Page 38: ...ZZER 32 2 1 21 31 POWER 47 2 4 30 1 3 T STAT 19 9 10 24 5 P6 1 6 P5 2 23 28 27 26 13 44 45 UP TIME 22 1hr TIMER 3 2 20 1 4 22 3 2 21 2 4 ROAST 14 3 1 3 4 14 12 10 11 3 6 2 1 5 4 29 25 30 HEAT 28 18 GRILL 40 ELEMENT TOP 35 41 34 36 20 19 17 7 P E N MICROSWITCH COM NO NC 7 6 5 FAN MOTOR 3 6 0 H z 5 0 H z 8 4 E 37 43 37 1 43 T STAT HOLD 15 16 6 LIGHTS 5 2 1 4 39 42 33 41 ELEMENT BOTTOM 33 MAINS TERMI...

Page 39: ... 39 Revision 4 F3544 Convection Oven Moffat Ltd April 2005 To Serial Number 232053 ...

Page 40: ... 40 Revision 4 F3544 Convection Oven Moffat Ltd April 2005 8 2 COOK TOP HOB ...

Page 41: ...er Knob 021474 Switch Light 024562 Hold Relay From S N 232054 022281 Hold Mini Contactor To S N 232053 018223 Hold Thermostat 002990 Microswitch 003002 Oven Lamp Glass 003434 Silk Gasket 013521 Oven Lamp 40W Miniature Edison Screw MOTOR ELEMENTS 003113 Oven Top Element 208 Volts 003114 Oven Bottom Element 208 Volts 011604 Oven Top Element 240 Volts 003074 Oven Bottom Element 240 Volts 013431K Fan ...

Page 42: ... 42 Revision 4 F3544 Convection Oven Moffat Ltd April 2005 10 ACCESSORIES OVEN RACKS PART NO 23254 SCONE TRAYS PART NO 02083 ...

Page 43: ... 43 Revision 4 F3544 Convection Oven Moffat Ltd April 2005 11 PARTS DIAGRAMS 11 1 OVEN MAIN ASSEMBLY 58 ...

Page 44: ...ACKET 23 023241 BODY 24 017788 LEG 6 150 mm 25 004879 FOOT PLATE 26 017770 PHIAL GUARD 27 004870 OVEN INNER 28 011413 R H OVEN SUPPORT 29 011407 SIDE INSULATION PANEL 30 013520 OVEN LIGHT ASSEMBLY 003434 SILK GASKET 013521 LAMP 40W 003002 LIGHT GLASS 31 013432 FAN 32 004595 FAN BAFFLE 33 003123 BAFFLE BRACKET 34 003113 TOP ELEMENT 208 220V 011604 TOP ELEMENT 230 240V 35 003074 BOTTOM ELEMENT 230 2...

Page 45: ...D ON CONTROL PANEL PIVOT 53 023245 PIVOT SUPPORT BOTTOM ASSEMBLY 54 023263 DOOR INNER GLASS 090200 SILICON EXTRUSION 1 90M 55 004876 DOOR GLASS CLAMP ANGLE 56 023264 DOOR OUTER GLASS 090225 SILICON EXTRUSION 0 96M 57 024562 POWER RELAY FROM SERIAL NUMBER 232054 024563 POWER RELAY UPGRADE KIT TO SERIAL NUMBER 232053 58 004594 COUNTERWEIGHT UK ONLY ...

Page 46: ...0V 60 Hz 7 024562 HOLD RELAY FROM SERIAL NUMBER 232054 022281 HOLD MINI CONTACTOR TO SERIAL NUMBER 232053 8 021536 RELAY CONTACTOR BRACKET 9 018789 BALL CATCH PLATE 10 011005 BALL CATCH LOCKNUT 11 021442 TIMER MOUNTING PANEL 12 011794 BUZZER 13 021537 BUZZER MOUNTING BRACKET 14 004873 CONTROL PANEL BAKBAR C 004872 CONTROL PANEL BLUE SEAL C 004729 CONTROL PANEL MOFFAT F 15 013610 DOOR BUSH 17 02147...

Page 47: ...Y Suite 8 71 Fullarton Rd Tel 08 8431 0522 Kent Town SA 5067 Spare Parts Free Call 1800 337 963 WESTERN AUSTRALIA MOFFAT PTY PO Box 689 Tel 08 9305 8855 Joondalup Business Centre WA 6027 Spare Parts Free Call 1800 337 963 NATIONAL COVERAGE FOR 24 HOUR SERVICE OR MAINTENANCE DIAL FREE CALL 1800 622 216 AUSTRALIA ONLY CANADA Lessard Agencies Limited Tel 416 766 2764 PO Box 97 Fax 416 760 0394 Stn D ...

Page 48: ...nits 6 7 Mount St Tel 0121 327 5575 Business Park Fax 0121 327 9711 Birmingham B7 5QU England UNITED STATES OF AMERICA MOFFAT INC 3765 Champion Blvd Winston Salem Tel 1 800 551 8795 NC27115 Fax 336 661 9546 NATIONAL COVERAGE FOR SERVICE OR MAINTENANCE DIAL FREE CALL 1800 551 8795 USA ONLY ...

Page 49: ...o vacant phase L1 terminal on terminal block and to terminal 7 on relay 6 Connect long thick red wire 950mm to power relay terminal 4 and remaining long thin wire 1050mm to relay terminal A Feed these wires through the plastic bush in the rear of the oven and into the control cavity 7 Loosen screws and open the control panel 8 Remove and discard wire from terminal 2 on the power switch to terminal...

Page 50: ... 50 Revision 4 F3544 Convection Oven Circuit schematic new wires shown in bold Figure 3 Utensils Direct 0845 873 6600 www utensilsdirect co uk 01903 823888 ...

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