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Moffat turbofan E31 Service Manual

Other manuals for turbofan E31: Specifications, Catalog
Manual is about: Moffat E31 Convection Oven Service manual

Summary of turbofan E31

  • Page 1

    Service manual e31 convection oven revision 2f/3506 october, 2002 manual p/n mome 31 applies to units from s/n 40423.

  • Page 2

    -2- revision 2/f3506 warning: all installation and service repair work must be carried out by qualified persons only..

  • Page 3: Contents

    -3- revision 2/f3506 contents this manual is designed to take a more in depth look at the e31 convection oven for the purpose of making the unit more understandable to service people. There are settings explained in this manual that should never require to be adjusted, but for completeness and those...

  • Page 4

    -4- revision 2/f3506.

  • Page 5: 1.  Specifications

    -5- revision 2/f3506 1. Specifications model: e31 legend - electrical connection entry point - water entry - 9mm / 3 / 8 ” i.D male hose connection front plan side (28.35) (4.70) (1.55) (23. 10) (23.60) (6.30) (1.85) dimensions shown in millimetres. Dimensions in inches shown in brackets..

  • Page 6

    -6- revision 2/f3506 location to ensure correct ventilation for the motor and controls the following minimum installation clearances are to be adhered to: rear 25mm / 1” left-hand side 25mm / 1” right-hand side 25mm / 1” oven internal dimensions width 468 mm / 18.5” height 418 mm / 16.5” depth 432 m...

  • Page 7: 2.  Installation

    -7- revision 2/f3506 should changing of the cord be necessary, gain access to the electrical connection terminal block and strain relief by removing the back panel (four screws). Water connection a cold water supply should be fitted to the water inlet (9mm / 3 / 8 ” hose connection) which is located...

  • Page 8

    -8- revision 2/f3506 1 3 2 door handle installation 1. Open oven door. 2. Remove two screws (item 2). 3. Remove the two screws (item 3) from the handle (item 1). 4. Install the handle bracket through the slot on the door side. 5. Screw in the two screws (item 2) fully, then fully screw in the previo...

  • Page 9: 3.  Operation

    -9- revision 2/f3506 1 7 6 5 4 3 2 3.1 description of controls 1. Power depress to switch power on or off (switch illuminates when power is on). 2. Thermostat temperature range 50 - 280°c (120 - 550°f). Indicator illuminates when elements are cycling on to maintain set temperature. Grill position - ...

  • Page 10

    -10- revision 2/f3506 3.2 explanation of control system the e31 turbofan convection oven features multi-function operator controls for which a correct understanding of their operation is required before carrying out any service or fault repair work. The control device functions are explained as foll...

  • Page 11

    -11- revision 2/f3506 contactor is open and the normal power supply to the oven thermostat is isolated. A second normally open switch pole is closed and this provides power to the 3 hour roast timer. If the roast timer is in the hold (vertical) position the timer switch contacts will be in their nor...

  • Page 12: 4.  Maintenance

    -12- revision 2/f3506 important: this unit is not water proof. Do not use a water jet spray to clean interior or exterior of this unit. Warning: always turn the power supply off before cleaning. Exterior clean with a good quality stainless steel cleaning compound. Harsh abrasive cleaners may damage ...

  • Page 13

    -13- revision 2/f3506 4.2 routine procedures 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 thei...

  • Page 14: 5.  Trouble Shooting

    -14- revision 2/f3506 5. Trouble shooting fault possible cause remedy the oven does not operate / start the mains isolating switch on the wall, circuit breaker or fuses are “off” at the power board. The power switch on the oven is off. Incorrect electrical supply. (refer fault diagnosis 6.1.1) power...

  • Page 15

    -15- revision 2/f3506 fault possible cause remedy continuous water out of oven water nozzle with oven on only—electrical fault. (refer fault diagnosis 6.1.6) with oven on or off—fault with water valve. Correct electrical fault. Service or replace as required. (refer service section 6.3.11, 6.3.10) 6...

  • Page 16

    -16- revision 2/f3506 fault possible cause remedy no thermostat heating indicator indicator faulty. (refer fault diagnosis 6.1.14) replace. (refer service section 6.3.3) grill not working grill indicator light not working element faulty / blown. (refer fault diagnosis 6.1.15) indicator faulty. (refe...

  • Page 17: 6.  Service Procedures

    -17- revision 2/f3506 section page no. 6.1 fault diagnosis ............................................................................................................. 19 6.1.1 oven does not operate / start ........................................................................... 19 6.1.2 fan doe...

  • Page 18

    -18- revision 2/f3506 6.3.15 fan ...................................................................................................................... 27 6.3.16 motor ................................................................................................................... 28 6.3.17 outer ...

  • Page 19

    -19- revision 2/f3506 6.1 fault diagnosis incorrect electrical supply check that the voltage across phase and neutral (l1 and l2) terminals of terminal block is the voltage as stated on the unit’s electrical rating plate. If incorrect, check electrical connection of supply wiring and / or check elec...

  • Page 20

    -20- revision 2/f3506 check voltage to the bottom terminal of the switch. If there is no voltage, then check wiring. With switch depressed, check for voltage at top terminal. If there is no voltage then replace switch. If voltage correct, check wir- ing to solenoid coil. If the power supply to the c...

  • Page 21

    -21- revision 2/f3506 6.1.10 no temperature control thermostat faulty with thermostat in off (vertical) position, the heating indicator should be off. If not then the thermostat is faulty—replace. Check that the thermostat phial is in correct location and check for broken capillary tube— replace if ...

  • Page 22

    -22- revision 2/f3506 indicator faulty check the voltage across the indicator terminals. If the voltage is correct then indicator is faulty—replace. If there is no voltage then check wiring. 6.1.16 grill indicator not working no power to timer check the voltage at terminal 5 on underside of the 180 ...

  • Page 23

    -23- revision 2/f3506 element cover lamp cover side rack four screws 6.2 access 6.2.1 control panel 1) open the oven door. Remove microswitch button by pulling straight off. 2) undo the two screws now visible. 1) undo the four screws holding the panel. 6.2.2 service (rear) panel 1) remove trays, rac...

  • Page 24

    -24- revision 2/f3506 two screws 6.3 replacement 6.3.1 light bulb / glass 6.3.2 door microswitch 1) unscrew lamp cover. 1) remove service panel (refer 6.2.2). 2) remove two screws holding microswitch to bracket. 6.3.3 indicator neon light 1) with control panel open (refer 6.2.1) remove the wires fro...

  • Page 25

    -25- revision 2/f3506 two screws two screws two screws 6.3.6 bake timer 1) remove bake timer knob by pulling it firmly away from control panel. 2) open control panel (refer 6.2.1) and undo two screws securing timer. 3) withdraw and remove two screws holding buzzer to bracket. 4) transfer wires to ne...

  • Page 26

    -26- revision 2/f3506 two screws 6.3.11 water solenoid 6.3.9 hold thermostat 1) open control panel (refer 6.2.1) and undo two screws securing hold thermostat bracket. 2) transfer wires to new thermostat. 3) remove service panel (refer 6.2.2) and from inside of oven loosen the thermostat phial bracke...

  • Page 27

    -27- revision 2/f3506 bottom element two screws top element one screw centre nut 6.3.15 fan 6.3.14 elements 6.3.13 spray nozzle 1) inside the oven remove the lh side rack and baffle (refer 6.2.3), then unscrew the water injection nozzle. 1) with service panel and baffle removed (refer 6.2.2 and 6.2....

  • Page 28

    -28- revision 2/f3506 2 screws two screws two screws 6.3.17 outer glass 6.3.16 motor 1) remove fan (refer 6.3.14) and then remove the wires that go to the motor. 1) open door 2) undo two screws securing turbofan cover plate to oven, and remove cover plate. 2) undo the four screws holding the motor b...

  • Page 29

    -29- revision 2/f3506 6.3.18 inner glass 1) remove the outer glass as above. Uncrimp the retaining lugs of the window spacer and remove the spacer and glass. 2) to replace, ensure the silicone rubber seal has not been displaced. Clean the glass and refit it. Place the window spacer in position and c...

  • Page 30

    -30- revision 2/f3506 5) carefully remove two screws holding grill/ broil switch to thermostat. Hint: tape grill/broil switch assembly together before removal to prevent it from springing apart. 7) adjust the calibration nut located at the base of the thermostat shaft. To increase oven temperature, ...

  • Page 31

    -31- revision 2/f3506 6.4.3 door alignment 6.4.2 door microswitch adjustment 1) open oven door. 2) remove service panel (refer 6.2.2). 3) with fingers, bend actuator arm of microswitch so that switch operates when door is in closed position. 1) alignment of the door can be achieved by loosening the ...

  • Page 32

    -32- revision 2/f3506 7. Electrical circuit schematic.

  • Page 33

    -33- revision 2/f3506 8. Electrical wiring diagram.

  • Page 34: 9.  Spare Parts

    -34- revision 2/f3506 9. Spare parts part no description controls 021473 switch - power 017121 thermostat 020823 knob - thermostat / bake timer 020849 neon indicator 011760 bake timer 011794 buzzer 021476 switch - ‘roast n hold’ 011419 ‘roast n hold’ timer 021472 ‘roast n hold’ timer knob 021474 swi...

  • Page 35: 10.  Accessories

    -35- revision 2/f3506 10. Accessories oven racks (part no 12809) scone trays (part no 02083) 100 mm (four inch) foot option (part no 13048) a25 stainless steel stand 25 mm (one inch) foot option (part no 13908).

  • Page 36: 11.  Parts Diagrams

    -36- revision 2/f3506 11. Parts diagrams 11.1 main assembly.

  • Page 37

    -37- revision 2/f3506 pos part no. Description 1 021533 wrapper 2 090406 insulation 3 013011 cover panel 4 013012 cover panel plate 5 011412 microswitch bracket 6 011389 microswitch insulator 7 002990 microswitch 8 003012 actuator rod 9 011414 vent tube 10 003016 motor mounting plate 11 013431 motor...

  • Page 38

    -38- revision 2/f3506 48 021465 handle bracket (handle assembly 021469) 49 021468 handle (handle assembly 021469) 50 ---------- control assembly (see section 1.2.1) 51 021530 bottom trim 52 013610 door bush (also used on control panel pivot) 53 011424 pivot support - bottom assembly 54 002340 door i...

  • Page 39

    -39- revision 2/f3506 11.2 control panel assembly.

  • Page 40

    -40- revision 2/f3506 pos part no. Description 1 018224 hold thermostat knob 2 018223 hold thermostat 3 021538 hold thermostat bracket (affix 018209 label) 4 017121 thermostat 50-300 ºc 5 011760 timer - 1 hr 6 011419 timer - 3 hr (240v 50 hz) 011983 timer - 3 hr (240v 60 hz) 7 022281 contactor 02228...

  • Page 41: 11.  Service Contacts

    -41- revision 2/f3506 11. Service contacts australia victoria head office and main warehouse 740 springvale road tel (03) 9518 3888 mulgrave vic 3170 fax (03) 9518 3838 spare parts department free call 1800 337 963 fax (03) 9518 3895 new south wales unit 8/142 james ruse drive rosehill nsw 2142 spar...

  • Page 42

    -42- revision 2/f3506 united kingdom blueseal ltd units 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 maintena...

  • Page 43

    -43- revision 2/f3506 appendix a. Power relay upgrade kit power switch mini-contactor kit includes 1 x power relay 2 x screw - 8 x 3 / 8 truss 1 x 160mm black wire 1 x 180mm red wire 1 x 950mm red wire 1 x 1050 red wire assembly instructions: (the electrical supply must be disconnected) 1) remove th...

  • Page 44

    -44- revision 2/f3506 units fitted with mini-contactor: units fitted with ‘schrack’ relay: 3hr timer light hold buzzer 35 2 1 24 34 power 52 2 4 33 1 3 t/stat 22 11 12 27 5 p6 1 6 p5 2 26 31 30 29 15 49 up time 25 1hr timer 3 2 23 1 4 25 3 2 24 2 4 roast 17 3 1 3 4 17 14 12 13 3 6 2 1 5 4 32 28 33 h...