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Viking Professional VMOC205SS, Service Manual

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Viking Professional VMOC205SS Service Manual Download Page 39

39

Rev 1 (May 2011)

PACKING AND ACCESSORIES

6

4

5

1

2

3

6

4

5

1

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3

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C

D

E

F

G

H

A

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C

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F

G

H

4-3 TURNTABLE TRAY

6-9  VIKING CD      

 

4-2 TURNTABLE SUPPORT

TRAY PACKING FOAM
 

DOOR PROTECTION SHEET
 

MICROWAVE OVEN

TOP PAD ASSEMBLY
 

PLASTIC BAG
 

TRAY HOLDER

 

BOTTOM PAD ASSEMBLY
 

Not replaceable items.

PACKING CASE

Summary of Contents for Professional VMOC205SS

Page 1: ...Y 2 BEFORE SERVICING 2 WARNING TO SERVICE PERSONNEL 4 MICROWAVE MEASUREMENT PROCEDURE Canada 5 MICROWAVE MEASUREMENT PROCEDURE USA 6 FOREWORD AND WARNING 7 PRODUCT SPECIFICATIONS 8 GENERAL INFORMATION 8 OPERATION 10 TROUBLESHOOTING GUIDE 16 TEST PROCEDURE 18 COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE 26 PICTORIAL DIAGRAM 33 PARTS LIST 34 PACKING AND ACCESSORIES 39 S51M338VMO205 SERVICE MANUAL ...

Page 2: ... check as per the Microwave Measure ment Procedure outlined in this service manual If microwave emissions level is in excess of the specified limit contact Viking Service immediately 1 888 845 4641 If the unit operates with the door open service person should 1 tell the user not to operate the oven and 2 contact VIKING plus the Department Of Health Canada and or the Food and Drug Administration s ...

Page 3: ...3 Rev 1 May 2011 Notes ...

Page 4: ...age capacitor 4 Disconnect the leads to the primary of the power transformer 5 Ensure that the leads remain isolated from other components and oven chassis by using insulation tape 6 After that procedure reconnect the power supply cord When the testing is completed 1 Disconnect the power supply cord and then remove outer case 2 Open the door and block it open 3 Discharge high voltage capacitor 4 R...

Page 5: ...cooking control on Full Power Cooking Mode Close the door and select a cook cycle of several minutes If the water begins to boil before the survey is completed replace it with 275 ml of cool water C Leakage test with enclosure installed 1 Grasp the probe of the survey instrument and hold it perpendicular to the gap between the door and the body of the oven 2 Move the probe slowly not faster than 2...

Page 6: ...ven cavity The water container shall be a low form of 600 ml 20 oz beaker with an inside diameter of approx 8 5 cm 3 1 2 in and made of an electrically nonconductive material such as glass or plastic The placing of this standard load in the oven is important not only to protect the oven but also to insure that any leakage is measured accurately 4 Set the cooking control on Full Power Cooking Mode ...

Page 7: ...defective C The door packing is not damaged D The door is not deformed or warped E There is no other visible damage with the oven Servicing and repair work must be carried out only by trained service personnel DANGER Certain initial parts are intentionally not grounded and present a risk of electrical shock only during servicing Service person nel Do not contact the following parts while the appli...

Page 8: ... cooking time Convection Temperature for Variable Cooking CONVECTION 100 450ο F Temp control LOW MIX BAKE 350ο F with 10 microwave power HIGH MIX ROAST 300ο F with 30 microwave power SLOW COOK 300ο F for 4 hours no preheat BROIL 450ο F preheat Help pad Reheat pad Add A Minute pad Popcorn pad Defrost pad Sensor Cook pad Convec Broil pad Convec Roast pad Convec Bake pad Convec pad Broil pad Slow Coo...

Page 9: ... cord must be used it should be a 3 wire 15 amp or more cord Do not drape over a countertop or table where it can be pulled on by children or tripped over accidentally CAUTION DO NOT UNDER ANY CIRCUMSTANCES CUT OR REMOVE THE ROUND GROUNDING PRONG FROM THIS PLUG OVEN DIAGRAM 1 Ventilation openings Rear side 2 Oven door with see through window 3 Oven lamp 4 Turntable support 5 Removable turntable Th...

Page 10: ...of microwave energy is stopped The oven will revert to the OFF condition 6 When the door is opened during a cook cycle third door switch monitor switch door sensing switch the secondaryinterlockrelayandtheprimaryinterlockswitch are activated with the following results The circuits to the turntable motor the cooling fan motor and the high voltage components are de energized the oven lamp remains on...

Page 11: ...aintained by thethermistorcircuit tocontinueoperationofthecooling fan motor until the temperature drops below 245ο F at which time the relay will be de energized turning off the fan motor Relay RY5 will however open as soon as the convection cycle has ended turning off the convection fan motor 5 At the end of the convection cook cycle shut off relay RY4 is energized turning on the damper motor The...

Page 12: ... start counting down to zero The cooking time is adjusted automatically according to the weight of the food 3 The shut off relays RY1 RY5 and RY6 are energized turning on the oven lamp turntable motor cooling fan motor and convection motor The power supply voltage is applied to the heating element 4 Now the oven is in the convection cooking mode 5 Whentheoventemperaturehasreachedtheprogrammed conv...

Page 13: ...WITCH THER MISTOR DOOR SENSING SWITCH AH SENSOR DAMPER MOTOR CONVECTION MOTOR TURNTABLE MOTOR 0 0033µ AC125V 0 022µ AC250V 0 0033µ AC125V NOISE SUPPRESSION COIL HEATIMG ELEMENT MAGNETRON POWER TRANSFORMER H V RECTIFIER CAPACITOR 0 94µ RY4 RY5 RY6 RY1 THIRD DOOR SWITCH MAGNETRON THERMAL CUT OUT OVEN THERMAL CUT OUT 117V 60Hz FM COM RY1 E 5 E 4 E 3 E 2 E 1 F 3 F 2 F 1 RY3 SECONDARY INTERLOCK RERAY N...

Page 14: ...L HEATIMG ELEMENT MAGNETRON POWER TRANSFORMER H V RECTIFIER CAPACITOR 0 94µ RY4 RY5 RY6 RY1 THIRD DOOR SWITCH MAGNETRON THERMAL CUT OUT OVEN THERMAL CUT OUT 117V 60Hz FM COM RY1 E 5 E 4 E 3 E 2 E 1 F 3 F 2 F 1 RY3 SECONDARY INTERLOCK RERAY N O RY1 COM RY3 COM RY2 N O RY2 N O RY3 A 9 A 7 CM DM OL FUSE RY2 TTM 0 022µ AC250V CONV THERMAL CUT OUT NOISE FILTER MONITOR SWITCH PRIMARY INTERLOCK SWITCH OV...

Page 15: ... heating element is located at the left side of the oven cavity It is intended to heat air driven by the convection fan The heated air is kept in the oven and force circulated and reheated by the heating element DOOR SENSING AND PRIMARY INTERLOCK SWITCHES The door sensing switch in the secondary interlock system is mounted in the upper position on the latch hook the pri mary interlock switch is mo...

Page 16: ...vection time reaches 0 the heating element is de energized and the convection fan stops operating and the oven shuts off DAMPER OPEN CLOSE MECHANISM Usually the damper is in the open position except during convection cooking Damper position is set automatically by damper motor damper switch motor cam and damper shaft These components are operated by a signal that judges if microwave cooking or con...

Page 17: ...ld appear on the display with beep sound Oven lamp does not light with door opened Oven lamp does not light in cook cycle It light when door is opened Cooking cycle runs 1 minute then shuts down Oven lamp light but turntable motor does not operate Turntable motor operates normally but cooling fan motor does not operate Oven does not go into a cook cycle when START pad is touched Low or no power is...

Page 18: ... in temperature If the water temperatures are accurately measured and tested for the required time period the test results will indicate if the magnetron tube has low power output low rise in water temperature which would extend cooking time or high power output high rise in water temperature which would reduce cooking time Because cooking time can be adjusted to compensate for power output the ma...

Page 19: ...he wire lead from the monitor switch NC terminal Check the monitor switch operation by using the ohmmeter as follows When the door is open the meter should indicate a closed circuit When the monitor switch actuator is pushed by a screw driver through the lower latch hole on the front plate of the oven cavity with the door opened in this condition the plunger of the monitor switch is pushed in the ...

Page 20: ...ECTION MODE It is difficult to measure the exact temperature in the convection oven An accurate thermocouple type TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST CONVECTION CUT OUT on side of the heater duct A continuity check across the thermal cut out terminals should indicate a closed circuit unless the temperature of thermal cut out reaches 302ο F 150ο C The thermal cut out resets automaticall...

Page 21: ...ker 2 3 Other possible troubles caused by defective control unit a Buzzer does not sound or continues to sound b Clock does not operate properly c Cooking is not possible d Proper temperature measurement is not obtained Note When defective components the Control Unit or Key Unit are replaced the defective part or parts must be properly packed for return in the shipping carton with its cushion mate...

Page 22: ...19 0V D C Damper motor RY5 Approx 19 0V D C Convection motor RY6 Approx 19 0V D C Cooling fan motor TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST If the display fails to clear when the STOP CLEAR pad is depressed first verify the flat ribbon cable is making good contact verify that the door sensing switch stop switch operates properly that is the contacts are closed when the door is closed and o...

Page 23: ... Fill approximately 200 milliliters 7 2 oz of tap water in a 1000 milliliter measuring cup 2 Place the container on the center of tray in the oven cavity 3 Close the door 4 Touch SENSOR COOK pad and number pad 1 Now the oven is in the sensor cooking condition and BAKED POTATO will appear in the display 5 Touch Start pad The oven will operate for the first 16 seconds without generating microwave en...

Page 24: ...1000 milliliter measuring cup 6 2 Place the container on the center of tray in the oven cavity 6 3 Close the door 6 4 Touch SENSOR COOK pad and number 1 pad 6 5 Touch Start pad The control panel is in automatic Sensor operation 6 6 The display will start to count down the remaining cooking time and the oven will turn off au tomatically after the water is boiling bubbling If new sensor dose not ope...

Page 25: ... a way as to change the resistance values in parallel with R50 1 Changing the resistancevaluesresultsinthatthereisthesamepotential at both F 3 terminal of the absolute humidity sensor and AN7 terminal of the LSI The voltage of AN6 terminal will indicate about 2 5V This initial balancing is set up about 16 seconds after the unit is put in the Sensor Cookingmode Asthesensorcookingproceeds thefood is...

Page 26: ...ly before removing outer case 1 Disconnect oven from power supply and remove outer case 2 Discharge high voltage capacitor 3 Disconnect filament leads of transformer from the magnetron and capacitor 4 Disconnect high voltage lead of capacitor from the transformer 5 Disconnect wire leads from the transformer 6 Remove two 2 screws holding the transformer to the base cabinet Re install 1 Rest the tra...

Page 27: ... plate and take off the turntable motor cover 3 Disconnect wire lead from the turntable motor 4 Remove the two 2 screws holding the turntable motor TURNTABLE MOTOR REMOVAL and coupling mounting plate to the oven cavity bottom 5 Turntable motor Coupling mounting plate and Thermal protection plate bottom will be free DAMPER ASSEMBLY REMOVAL 1 Disconnect oven from power supply and remove outer case 2...

Page 28: ...he chassis support from the oven 7 Remove one 1 screw holding the magnetron air guide to the waveguide 8 Remove the magnetron air guide from the waveguide 9 Disconnect wire leads from the fan motor 10 Release the main harness from the hole of the fan duct 11 Release the thermistor harness from the hole of the fan duct 12 Release one 1 tab holding the fan duct to the rear cabinet 13 Release one 1 t...

Page 29: ... hit the fan blade strongly when installed because the bracket may be disfigured Make sure that the fan blade rotates smooth after installation Make sure that the axis of the shaft is not slanted 4 Reset the fan duct assembly to its place 5 Install the tabs of fan duct to the rear cabinet and air guide 6 Install the magnetron air guide with the one 1 screw 7 Reinstall the main harness and thermist...

Page 30: ...ch switch has not activated with the door closed loosen the screw and adjust it After adjustment check the following 1 In and out play of door remains less than 0 5mm at the latched position 2 The door sensing switch and primary interlock switch interrupt the circuit before the door can be opened 3 Monitor switch contacts close when door is opened 4 The third door switch contacts open when the doo...

Page 31: ...ure Note The door on a microwave oven is designed to act as an electronic seal preventing the leakage of microwave energy from oven cavity during cook cycle This function does not require that door be airtight moisture condensation tight or light tight Remove door assembly refer to Door Replacement Replacement of door components are as follows 1 Place door assembly on a soft cloth with latches fac...

Page 32: ...tended periods After adjustment of the door interlock and monitor switches are completed individual or collectively interlock switch test and microwave leakage test must be performed with survey instrument and test results must be confirmed to meet the requirement of the performance standard for microwave ovens as undermentioned Requirement Every microwave oven shall function in such a manner that...

Page 33: ...AND FUSE OVEN LAMP SOCKET N O PNK G R Y R E D THERMISTOR 1 2 RED RED RED RED BLK BLK WHT WHT GRN MAGNETRON RED HIGH VOLTAGE COMPONENTS HIGH VOLTAGE CAPACITOR POWER TRANSFORMER P P L BRN ORG RY6 RY4 RY5 CN G RY1 COM RY1 N O RY2 COM ORG RY2 N O RY3 COM RED PNK RY3 N O BRN BRN RED GRY PNK W H T BLK RED GRY G R Y G R Y O R G NOTE Hot ORG wire must be connected to the power transformer terminal nearest...

Page 34: ...CB559MRK0A Control panel frame with key unit VMOC205SG 1 3 2 FPNLCB560MRK0A Control panel frame with key unit VMOC205GG 1 3 2 FPNLCB561MRK0A Control panel frame with key unit VMOC205BU 1 3 2 FPNLCB562MRK0A Control panel frame with key unit VMOC205LE 1 3 2 FPNLCB563MRK0A Control panel frame with key unit VMOC205MJ 1 3 2 FPNLCB592MRK0 Control panel frame with key unit VMOC205MS 1 3 2 FPNLCB565MRK0A ...

Page 35: ...oor frame assembly VMOC205SS 1 BT 5 FCOV B428 KITL Door frame assembly VMOC205BT 1 BT 5 FCOV B429 KITL Door frame assembly VMOC205SG 1 BT 5 FCOV B430 KITL Door frame assembly VMOC205GG 1 BT 5 FCOV B431 KITL Door frame assembly VMOC205BU 1 BT 5 FCOV B432 KITL Door frame assembly VMOC205LE 1 BT 5 FCOV B433 KITL Door frame assembly VMOC205MJ 1 BT 5 FCOV B438 KITL Door frame assembly VMOC205MS 1 BT 5 ...

Page 36: ...m 14 AA 7 2 XOTS740P12000 Screw 4mm x 12mm 4 AA 7 3 XCTWW40P08000 Screw 4mm x 8mm 2 AA 7 4 XHTS740P08RV0 Screw 4mm x 8mm 4 AA 7 5 LX CZ0052WRE0 Special screw 2 AA 7 6 XWVS760 07000 Washer 6mm x 0 7 mm 1 AA 7 7 LX WZA004WRE0 Washer 1 AA 7 8 LX CZA074WRE0 Special screw 6 AA 7 9 XBPS730P14K00 Screw 3mm x 14mm 1 AA 7 10 XBPS740P25000 Screw 4mm x 25mm 2 AA 7 11 XBTWW40P06000 Screw 4mm x 6mm 3 AA 7 12 X...

Page 37: ...25 4 3 4 2 1 7 2 7 7 19 1 18 7 16 7 1 1 2 1 4 4 13 1 1 7 19 1 4 4 18 4 19 4 10 4 12 7 9 7 16 4 11 1 6 1 9 7 17 4 9 7 23 7 6 1 16 4 29 4 6 7 24 2 4 7 4 2 11 7 22 4 20 7 7 1 11 4 8 4 24 4 16 7 18 1 4 4 27 4 27 7 13 4 28 7 2 6 8 7 2 4 24 4 17 4 5 x3 7 22 6 6 6 4 6 6 7 16 4 26 x4 x4 1 17 7 22 4 32 7 16 1 1 A x3 7 1 2 2 7 24 7 5 x4 7 2 6 7 2 10 2 9 x2 2 8 7 8 x3 1 8 4 31 7 24 7 20 7 24 1 13 1 3 7 4 7 4...

Page 38: ... F G H CONTROL PANEL PARTS DOOR PARTS MISCELLANEOUS 5 2 5 9 5 1 5 5 8 5 4 5 8 5 8 5 8 5 5 5 3 5 7 5 6 5 10 5 11 7 24 7 24 3 5 3 4 3 7 3 3 3 2 3 2 1 3 6 3 1 3 2 3 3 7 3 2 2 3 9 3 8 Actual wire harness may be different than illustration 6 3 6 4 6 5 6 6 6 2 6 1 6 10 6 11 ...

Page 39: ... 3 6 4 5 1 2 3 A B C D E F G H A B C D E F G H 4 3 TURNTABLE TRAY 6 9 VIKING CD 4 2 TURNTABLE SUPPORT TRAY PACKING FOAM DOOR PROTECTION SHEET MICROWAVE OVEN TOP PAD ASSEMBLY PLASTIC BAG TRAY HOLDER BOTTOM PAD ASSEMBLY Not replaceable items PACKING CASE ...

Page 40: ...ieval system or transmitted in any form or by any means electronic mechanical photocopying recording or otherwise without prior written permission of the publisher COPYRIGHT 2011 BY VIKING ALL RIGHTS RESERVED VIKING RANGE CORPORATION 111 Front St Greenwood MS 38930 Tel 888 845 4641 ...

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