MD series 32Z3329 Issue 6
Contents
1. 5 Using a Megger test the insulation resistance between T CHASSIS Primary winding P and chassis Pass if over 10 MQ Filament winding F and chassis Pass if over 10 One end of the High Voltage winding is connected to the chassis so this is not tested MD Series Ovens 32 3329 Issue 6 Page 8 Procedure D High Voltage Capacitor Test You will need Digital Multi meter D M M A Megger or similar resistance meter using 500V d c WARNING High voltages and large currents are present at the High Voltage Capacitor It is very dangerous to work near this part when the oven is on NEVER make any voltage measurements at the High Voltage circuits including the magnetron filament WARNING Even when the oven is not cooking the High Voltage Capacitor has High Voltages present because of the Soft Start circuit Isolate the oven before testing 1 Isolate the oven from the mains supply 2 Ensure that the High Voltage Capacitor is discharged before commencing work 3 Remove all connections from the High Voltage Capacitor 4 Using a D M M check for continuity between the terminals amp compare results with table Between Terminals Pass if approximately 10 MQ Between Terminals and Case Pass if open circuit 5 Using a Megger test the insulation resistance between the terminals and the case Between Terminals and Case Pass if over 100 MQ Procedure E High Voltage Rectifier2. Merrychef 0 ocoooo MD SERIES SERVICE MANUAL Part No 3223329 Issue No 6 For all MD Series models manufactured from January 2001 CAUTION MICROWAVE EMISSIONS DO NOT BECOME EXPOSED TO EMISSIONS FROM THE MICROWAVE GENERATOR OR PARTS CONDUCTING MICROWAVE ENERGY Table of Contents Safety Gode alah whith ne ute 3 Product Specifications 4 Installation Instructions ssssssse 5 Error Codes and 6 Power Output Testing to BS EN 60335 2 90 7 Power Output Testing 8 Power Transformer Test 8 High Voltage Capacitor 9 High Voltage Rectifier 9 Magnetron Test s utm dtm AA e PR 9 Exploded View sss 10 Door Assembly 2t et rp ANA 11 Door Replacement and 12 Door 1 14 e EE 13 Door Interlock operation 14 Membrane Panel 15 Input Wiring Details m 16 Part Number Identification List 17 18 Witing Diagram NET 19 Appendix 1 Cleaning procedure ne 20 Appendix 2 Door interlock All Models before Jan 2007 21 Manu
3. on a soft cloth with the Choke Cover 16 facing up UPPER AND LOWER OVEN HINGE REMOVAL 1 Remove the Choke Cover referring to CHOKE COVER REMOVAL 2 Release the Door Hinges 14 from the door panel DOOR HANDLE REMOVAL 1 Remove the two screws holding the Door Handle 1 to door 2 Remove the Door Handle from the Door Body UPPER AND LOWER DOOR CATCH REMOVAL 1 Remove the Inner Handle 3 from the door assembly 2 Remove the three screws holding the Door Catch Bracket 8 to the Door Body 3 Release the Door Spring 11 from the tab of the Door Catch Link Rod 10 and Door Catch Bracket 4 Release the Catches 9 from Door Catch Link Rod and Door Catch Bracket DOOR OUTER SKIN REMOVAL 1 Set the four tabs of the Door Outer Skin 4 upright 2 Remove the Door Outer Skin from the Door Body 7 DOOR GLASS REMOVAL 1 Remove the four screws holding the two Glass Locators 5 to the Door Body 7 MD Series Ovens 32 3329 Issue 6 Page 13 Door interlock operation Door interlock operation The door on the oven is monitored by four microswitches Three of these are used in the conventional Primary Secondary and Monitor switch arrangement shown below while the fourth is a low voltage switch linked directly to the control circuitry Door interlock arrangement Power In 66b Power Out The switches operate as follows 1 Monitor Switch 66b Top As the door is
4. Mica Plate Stirrer Assembly 30M0027 30M0027 30M0027 30M0027 28 29 Decorative Trim LH 30M0029 30M0029 30M0029 30M0029 30 Decorative Trim Top 30M0030 30M0030 30M0030 30M0030 31 Air Inlet Filter 30M0031 30M0031 30M0031 30M0031 32 Chassis 30M0032 30M0032 30M0032 30M0032 HV Transformer J1342 30M0035 ES HV Transformer J1338 30M0033 30M0033 30M0033 34 Decorative Trim RH 30M0034 30M0034 30M0034 30M0034 35 Strain Relief Bush 3121036 3121036 3121036 3121036 37 Lamp Cover Film 30M0037 30M0037 30M0037 30M0037 38 Lamp 30M0038 30M0038 30M0038 30M0038 39 Lamp Holder 30M0039 30M0039 30M0039 30M0039 40 Lamp Bracket 30M0040 30M0040 30M0040 30M0040 41 Air Outlet Duct 30M0041 30M0041 30M0041 30M0041 42 Temp Sensor 30M0042 30M0042 30M0042 30M0042 43 Thermal Fuse 30M0043 30M0043 30M0043 30M0043 Note 1 Part 17 supplied as MD 1800 remove label for MD1000 amp MD1400 MD Series Ovens 3273329 Issue 6 Page 17 Part number identification chart No Description MD1000 MD1400 MD1800 MD1800 Pre Jan 2007 From Jan Part No Part No Part No Part No 44 Lamp Cover 30M0044 30M0044 30M0044 30M0044 45 Back Case 30M0045 30M0045 30M0045 30M0045 46 Rear Air Guide 30M0046 30M0046 30M0046 30M0046 47 Upper Air Duct 30M0047 30M0047 30M0047 30M0047 48 Cooling Fan Assembly 30M0048 30M0048 30M0048 30M0048 49 G
5. Test You will need A Megger or similar resistance meter using 500V d c WARNING High voltages and large currents are present at the High Voltage Rectifier It is very dangerous to work near this part when the oven is on NEVER make any voltage measurements at the High Voltage circuits including the magnetron filament WARNING Even when the oven is not cooking the High Voltage Rectifier has High Voltages present because of the Soft Start circuit Isolate the oven before testing 1 Isolate the oven from the mains supply Ensure that the High Voltage Capacitor is Open Circuit both ways FAIL discharged before commencing work Conducts one way only PASS 3 Remove all connections from the High Voltage Rectifier Short Circuit both ways FAIL 4 Using the Megger test for continuity in both Conducts one way leaks the other directions Compare results with the table Cohddcte ODE leaks henter EE Procedure F Magnetron Test You will need A Megger or similar resistance meter using 500V d c A Magnetron can be tested for an open filament or a short circuit by carrying out a continuity check 1 Isolate the oven from the mains supply 2 Ensure that the High Voltage Capacitor is discharged before commencing work 3 Remove all connections from the Magnetron 4 Acontinuity check across the Filament terminals should be 1ohm or less 5 Acontinuity check between each filament terminal and the metal outer should rea
6. not operating continuously whether the display indicates cooking or not Always discharge the HT capacitors before working on the oven using a suitably insulated 10 MQ Resistor Before removing the rear cover from the oven ensure you do the following e Switch off the mains supply and remove the plug from the wall socket or e lf the oven is hard wired ensure that the power is turned off at the isolator switch Note the oven does NOT have an On Off switch Upon completion of a service on an MD Series oven or before reconnecting the appliance to the mains supply for testing check all of the following points All internal electrical connections are correct All wiring insulation is correct and is not touching a sharp edge All Earth connections are electrically and mechanically secure All four door safety interlocks are secure and mechanically sound The door operation is smooth The door activates all four of the door interlock switches in the correct order e All fuse holder safety covers are correctly fitted Before finishing the service call recheck the following points All of the electronics are functioning correctly and all of the touch pads are working The power output of the oven is correct see pages 7 amp 8 Microwave emission is below permissible limit 5mW cm see BS EN 60335 2 90 Oven has correct 50mm air gap all round Air flow should not be restricted MD Series Ovens 32 3329 Issue 6 Page 3 Prod
7. 0334 11M0334 11M0334 11M4334 82 Oven Shelf 30M0082 30M0082 30M0082 30M0082 83 HT Lead 1 30M0083 30M0083 30M0083 30M0083 84 HT Lead 2 30M0084 30M0084 30M0084 91 Mains Filter Bracket 40M0961 40M0961 40M0961 40M0961 92 Filter Shell Clip 30M0092 30M0092 30M0092 30M0092 93 Filter OIN Clip 30M0093 30M0093 30M0093 30M0093 94 Microswitch 30M4073 95 Microswitch 30M4072 96 Spring 30M4066 97 Top lever 30M4071 Note Model 0750 Tesco uses HV Capacitor 0 74uF 30M0098 amp HV Capacitor 1 0uF 30M0059 MD Series Ovens 3223329 Issue 6 Page 18 ircuit diagram Q3SH3A3H SNISVHd HOSN3S ViHH3 0 IS HOSN3S iviHHSAD oOO0Tr2ONM NG LO GINNIT OZsIN HIWHDISNYEL 9 ozun OZ SALON Ee TRO o AHVWIHd egg 299 AuvaNooas NOILISOd Nido HOOQ NI NMOHS S3HOLIMS 87 T000 Ou BALITA SNIVW PAL AITAYO Page 19 MD Series Ovens 3273329 Issue 6 APPENDIX 1 Cleaning procedure For the oven to operate at peak efficiency the cavity door and the air filter must be kept clean A daily cleaning routine will ensure that you comply with the required hygiene standards and will help to maintain and prolong the efficiency of your oven Follow the SAFETY INSTRUCTIONS at the beginning of this manual e ALWAYS switch off at the electrical supply Faults arising from neglect e As required wipe out spillage s with disposabl
8. al Corrections and Modifications 22 From January 2007 only the MD1800 Microwave Oven model is being manufactured All the other MD Series ovens are discontinued Note that the MD 1800 currently in production has a different door interlock system to the earlier model and can be identified from the handle which is solid and does not have the door catch release mechanism on the inside face of the handle Merrychef Limited Station Road West Ash Vale Aldershot Hampshire GU12 5XA United Kingdom Tel 44 0 1252 371000 Fax 44 0 1252 371007 Internet address http www merrychef com E mail sales merrychef com or service merrychef com MD Series Ovens 32 3329 Issue 6 Page 2 SAFETY CODE This manual is designed to assist engineers who have been on a recognised product familiarisation and training course run by Merrychef Limited It has been prepared to offer technical guidance for the Merrychef MD Series Commercial Microwave Ovens Please remember that it is wiser not to attempt a service task if you are unsure of being able to complete it competently quickly and above all safely To avoid injury to yourself and to protect the appliance from possible damage please follow this Safety Code when servicing these ovens Before attempting to repair the oven check it for microwave leakage Check that the oven is not emitting microwaves even when supposedly not in operation Check that the oven is
9. closed the monitor switch is opened 2 Primary Interlock Switch 66a Lower Middle The Primary switch is then closed 3 Secondary Interlock Switch 66c Upper Middle The Secondary Switch then closes 4 Low voltage Switch 66d Bottom The Low voltage switch operates concurrently with the Primary and Secondary switches When the door is opened the switches operate in the reverse order MD Series Ovens 32 3329 Issue 6 Page 14 Membrane panel circuit You will need A Digital Multi meter D M M Procedure 1 2 Isolate the oven from the mains supply Remove the Logic Assembly from the Control Panel Housing Unplug the membrane tail from the Logic PCB Assembly Using a D M M check for continuity between the correct terminals when the pads are pressed When the panel has been tested re assemble and re test the control housing MD Series Ovens 3273329 Issue 6 Page 15 Input wiring details Green Yellow 26 Mains Cable Assy 3120220 35 Strain Relief Bush 3171036 60 30M0060 67 Fuse Cover 2021080 74 16A Mains Filter 3020997 75 Holder 3020231 76 Fuse 13A Anti surge 3020168 MD Series Ovens 3223329 Issue 6 Page 16 Part number identification chart 1 No De
10. d open MD Series Ovens 32 3329 Issue 6 Page 9 Exploded view Door interlock details for Models before January 2007 MD1000 MD1400 amp MD1800 See APPENDIX 2 d MD1800 January 2007 Note Models MD0750 amp MD1000 have one Magnetron Assembly only Parts 51 amp 61 HV Capacitor 0 74uF 30M0098 HV Capacitor 1 0uF 30M0059 gt O c 5 D D quee 9 o E 0 KA Do ka lo O o N O N S i DO gt gt N e ss 5 e set mp LO gt O o D L op a MD0750 Tesco Page 10 Door assembly MD Series Note that the MD1800 currently in production has a different door interlock system to earlier MD Series models and can be identified from the handle which is solid and does not have the door catch release mechanism on the inside face of the handle Door Handle Models before January 2007 MD1000 MD1400 amp MD1800 No Description MD1000 MD1800 MD1400 MD1800 From Jan 2007 80 Door Assembly 11M0334 11M4334 HIN w ry MD Series Ovens 3223329 Issue 6 Page 11 Door replacement and door adjustment After any service work to the door the oven should always be checked for microwave leakage with a suitable meter DOOR REPLACEMENT 1 Remove four screws holding the Upper and Lower Hinge Plate 14 to the oven cavity 2 Remove Door Assembly 80 by pulling it forward 3 Onre instal
11. e or misuse including use paper wipes without clean filters in place are not covered by the guarantee Service visits as a result of such faults will be chargeable e NEVER use steel wool knives or harsh abrasives on any part of the oven As with all electrical appliances it is wise to have the electrical connections inspected periodically Cleaning the Air Filter 1 Remove the air filter from along the lower edge of the oven 2 Washin clean warm soapy water rinse and pat dry Put the filter back into position DO NOT USE THE OVEN WITHOUT A CLEAN AIR 1 Wipe down the sides and floor of the cavity with a damp FILTER IN POSITION cloth 2 Gently wipe the ceiling Take care not to press upwards as this could damage the stirrer cover Cleaning the oven cavity and door Cleaning the control panel and exterior surfaces Wipe down regularly with a damp cloth Hints and Tips for stubborn stains in the oven cavity 1 Place a container of water 1 5 litres into the centre of the oven cavity 2 Settimer to 9 minutes 3 Set microwave power to 10096 4 Atend of steam cycle wipe out cavity with a clean cloth Replacing the Light Bulb WARNING Disconnect the oven from the electrical supply before removing the light bulb cover O R 1 Undo screw on panel on side of the oven and remove panel 2 Replace light bulb Part No 33M0038 and replace panel and tighten screw NOTE Light bulbs are not co
12. ling new door assembly secure the upper and lower oven hinges with the four mounting screws to the oven cavity 4 Make sure the door is parallel with the bottom line of the oven cavity face and the catches pass through the catch holes correctly See door adjustment DOOR ADJUSTMENT When removing and or loosening hinges during door adjustment or replacement the following adjustment criteria must be met The door is adjusted to meet the following three conditions by keeping the hinge screws slack 1 Adjust door interlock block to a position where it smoothly locates with the catches through the catch holes 2 Deviation of door alignment from horizontal line of cavity front is to be less than 1 0mm 3 The door is positioned so that it touches the cavity front Reinstall outer case and check for microwave leakage around the door with an approved microwave leakage meter do Upper Door Hinge Door Assembly Door Catches MD Series Ovens 3273329 Issue 6 Page 12 Door servicing CHOKE COVER REMOVAL Flat Bladed Screwdriver 1 Insert a flat type screw driver into the gap SS between the Choke Cover 16 and Door Body 7 as shown below to free the engaging clips A protective piece of tape should be used so as not to damage the door panel 2 Lift up the Choke Cover Protect With Tape P Centre Pan Choke Cover Upper Door Hinge DOOR COMPONENTS REMOVAL Place the Door Assembly 80
13. nts ALWAYS Place containers in the cavity carefully impact damage may chip the oven shelf NEVER Install an oven above fryers grills griddles or any other major heat source NEVER Stack machines on top of each other without using the stacking adapter provided stacking adapter maximum 3 ovens in a stack 1 MD Series Ovens 3223329 Issue 6 Page 5 Error codes and diagnostics The MD series oven will identify some of the most common problems by flashing an error message code in the time display window These are the error messages and suggestions for repairing them Door not fully shut Close door fully Possible electrical fault Check microswitch door circuit Check microswitch connection to PCB Check ribbon cable Check relay PCB amp logic PCB No time has been set Set a time Invalid time has been set Set a valid time Invalid program has been Use call back to check program set Memory failure running a Re Program Pad Program if fault repeats replace logic PCB MD Series Ovens 32 3329 Issue 6 Page 6 Procedure A Power Output Test in accordance with BS EN 60335 2 90 Annex AA This test is given in the BSI test standard for microwave ovens It is reproduced below not so that you can follow it but to show you why it is impractical in normal conditions A simplified procedure which gives a good approximation to the BSI power output is given in Procedure B which follows N
14. old Resistor 3020235 3020235 3020235 3020235 51 Magnetron Thermostat 30M0051 30M0051 30M0051 30M0051 52 10A Fuse In line Assembly 11M0330 11M0330 11M0330 11M0330 56 Fan Scroll 30M0056 30M0056 30M0056 30M0056 57 Main Capacitor Bracket 30M0057 30M0057 30M0057 30M0057 58 Capacitor Clamp 30M0058 30M0058 30M0058 30M0058 HV Capacitor 0 74uF 3071329 59 HV Capacitor 0 88uF 3041075 HV Capacitor 1 0uF 30M0059 30M0059 30M0059 HV Capacitor 1 1 3021242 3021242 60 Rear Panel 30M0060 30M0060 30M0060 30M0060 61 Magnetron 30M0061 30M0061 30M0061 30M0061 62 Magnetron Air Splitter 30M0062 30M0062 30M0062 30M0062 63 Magnetron Cooling Duct 30M0063 30M0063 30M0063 30M0063 64 Cooling Duct Cover 30M0064 30M0064 30M0064 30M0064 65 Interlock Holder switch holder 30M0065 30M0065 30M0065 30M4065 66a d Microswitch V5S010CB 4 3041176 3021176 3071176 67 Fuse Cover 2021080 2021080 2021080 2021080 68 Spring 1 30M0068 30M0068 30M0068 30M4066 69 Spring 2 30M0069 30M0069 30M0069 30M0069 70 Top Lever 30M0070 30M0070 30M0070 30M0070 71 Middle Lever Up lever 30M0071 30M0071 30M0071 30M4071 72 Bottom Lever Lower lever 30M0072 30M0072 30M0072 30M4072 73 Filter Bracket 40M0961 40M0961 40M0961 40M0961 74 16A Mains Filter 3020997 3020997 3020997 3020997 75 Fuse Holder 3020231 3020231 3020231 3020231 76 Fuse 13A Anti surge 3020168 3020168 3020168 3020168 78 HV Diode Assy 30M0078 30M0078 30M0078 30M0078 79 Self Adhesive Foot 30M0079 30M0079 30M0079 30M0079 80 Door Assembly 11M
15. ote This test can only be carried out on a COLD oven If the oven has been operating even for only a few seconds the power given will be lower than the oven rating This test must also be carried out at a stable voltage the voltage in most kitchens varies considerably even within the period of the test If the oven has been operating go to Procedure You will need A thermometer capable of reading to 0 1 C A cylindrical borosilicate glass container 190mm diameter with a wall thickness of 3mm or less A calculator A set of scales capable of reading 1kg to an accuracy of 1g A glass or plastic stirrer A jug capable of holding over 1 litre of water Drinkable water which is at a temperature of 10 C 1 C A Nariac or similar variable transformer capable of supplying the oven to ensure a stable voltage WARNING The Borosilicate Glass container has thin walls and is therefore fragile take care not to break it during use Method A cylindrical container of borosilicate glass is used for the test It has a maximum thickness of 3mm an external diameter of approximately 190mm and a height of approximately 90mm The mass of the container is determined At the start of the test the oven and the empty container are at ambient temperature Potable water having an initial temperature of 10 C 1 C is used for the test The temperature of the water is measured immediately before it is poured into the container A quanti
16. scription MD1000 MD1400 MD1800 MD1800 Pre Jan 2007 From Jan 2007 Part No Part No Part No Part No 1 Outer Handle 30M0001 30M0001 30M0001 30M4002 2 Handle Bearing 4 30M0002 30M0002 30M0002 30M0002 3 Inner Handle 30M0003 30M0003 30M0003 30M4003 4 Door Outer Skin 30M0004 30M0004 30M0004 30M0004 5 Glass Locator 30M0005 30M0005 30M0005 30M0005 6 Outer Door Glass 30M0006 30M0006 30M0006 30M0006 7 Door Body 30M0007 30M0007 30M0007 30M0007 8 Door Catch Bracket 30M0008 30M0008 30M0008 30M0008 9 Door Catch 2 Catch hook 30M0009 30M0009 30M0009 30M4009 10 Door Catch Link Rod 30M0010 30M0010 30M0010 30M0010 11 Door Spring 30M0011 30M0011 30M0011 30M4011 12 Oven Cavity 30M0012 30M0036 30M0036 30M0036 13 Door Catch Crank 30M0013 30M0013 30M0013 30M0013 14 Upper Lower Hinge Plate 30M0014 30M0014 30M0014 30M0014 15 Inner Door Film 30M0015 30M0015 30M0015 30M0015 16 Choke Cover 30M0016 30M0016 30M0016 30M0016 17 Control Panel Cover see note 1 30M0017 30M0017 30M0017 30M0017 18 Membrane Blue 11M0384 11M0384 11M0384 11M0384 19 Display Screen 30M0019 30M0019 30M0019 30M0019 20 Control Housing Moulding 30M0020 30M0020 30M0020 30M0020 21 Logic PCB Assy 11M0326 11M0326 11M0326 11M0326 22 Housing Support Bracket 30M0022 30M0022 30M0022 30M0022 23 Relay PCB Assy 11M0327 11M0327 11M0327 11M0327 24 10 Way Ribbon Cable Assy 11E0081 11E0081 11E0081 11E0081 25 Insulating Sheet 30M0025 30M0025 30M0025 30M0025 26 Mains Cable Assy 3120220 3120220 3120220 3120220 27
17. tages of up to 9 minutes 59 seconds each Programmed Control System Wipe clean touch pad operating microprocessor based control system Direct readout of time and power set 10 Pre programmed cooking sequences accessed by just two key presses Safety Features Four door interlock switches Cavity Overheat Sensor Magnetron Overheat Sensor Additional Features e Easy to use multistage programming e Manual and Pre programmed mode always available e Magnetron soft start circuit for increased life and faster activation e Multiple product facility MD Series Ovens 3213329 Issue 6 Page 4 Installation instructions Power Supply Requirements The oven should be connected to a suitable electricity supply which can cope with the switching on surge that occurs with certain types of catering equipment such as microwaves Because of this requirement we strongly recommend that a separate suitably rated supply is installed for the oven The supply for the oven should be fitted with a Type C circuit breaker rated at 16A Positioning the Oven NEAN SEHE Ji In order to maintain adequate ventilation for air intake and exhaust to allow access for cleaning filters you must allow a minimum of 50mm clearance all around the oven Air intake temperature should not exceed 35 C excessive temperature can lead to reduced operating duty cycle or premature ageing of internal compone
18. the oven and close the door 4 Turn the oven on 5 Setthe timer to 1 02 6 Press the 100 pad 7 When the oven bleeps open the door and remove the tray 8 Stir the water thoroughly and measure its temperature Record this as T e Calculation 1 T r T e T s 2 Power 78 5 x T r Power is in Watts The power given by the above test should be within 15 of the rated power Procedure C Power Transformer Test You will need A Digital Multi meter D M M A Megger or similar resistance meter using 500V d c 1 Isolate the oven from the mains supply WARNING High voltages and large currents are present at the secondary winding and filament winding of the Power Transformer It is very dangerous to work near this part when the oven is on NEVER make any voltage measurements at the High Voltage circuits including the magnetron filament WARNING Even when the oven is not cooking the Power Transformer has High Voltages present because of the Soft Start circuit Isolate the oven before testing 2 Ensure that the High Voltage Capacitor is discharged before commencing work 3 Remove all connections from the Power Transformer 4 Using a D M M check the continuity of the windings Results should be as follows Mains winding between tags P amp P Approx 1 3 Q High Voltage winding Approx 82 Q between tag S amp chassis Filament winding Less than 1 O between terminals F amp F
19. ty of 1000g 5g of water is added to the container and its actual mass obtained The container is then immediately placed in the middle of the oven shelf which is in its lowest normal position The appliance is supplied at rated voltage and operated at the maximum power setting The time for the water temperature to attain 20 C 2 C is measured The oven is then switched off and the final water temperature is measured within 60seconds NOTES 1 The water is stirred before its temperature is measured 2 Stirring and measuring devices are to have a low heat capacity The microwave power output is calculated from the formula p 4187 Mw T2 T1 0 55 Mc T2 To t P is the microwave power output in watts My is the mass of the water in grams Mc is the mass of the container in grams To is the ambient temperature in C Ti is the initial temperature of the water in C is the final temperature of the water in C t is the heating time in seconds excluding the magnetron filament heat up time MD Series Ovens 32 3329 Issue 6 Page 7 Procedure B Simplified Power Test You will need A thermometer capable of reading to 0 1 C A Polypropylene tray approximately 200mm x 200mm A measuring jug A calculator Water which is at a temperature of 10 C 2 C 1 Measure 1 litre of cold water into the tray using the measuring jug 2 Measure the water temperature and record it as T s 3 Place the tray in
20. uct specifications Model Number For example MD1800C25EX Model MD 1800 1000W 220 230V 50Hz Export model MD Power Voltage Frequency Country Only Model MD1800 is currently manufactured Model prefix Model Number Voltage Frequency Country MD 750 2 220 230V a c 5 50 Hz UK 1000 4 230 240V a c 6 60 Hz EX export 1400 1800 Power Requirements 075045CUK 230 240V ac 50 Hz 13 0A Single Phase 2 Wire Earth MD1000C45UK 230 240V ac 50 Hz 13 0A Single Phase 2 Wire Earth MD1000C25EX 220 230V ac 50 Hz 14 2A Single Phase 2 Wire Earth MD1400C45UK 230 240V ac 50 Hz 13 0A Single Phase 2 Wire Earth MD1400C25EX 220 230V ac 50 Hz 14 2A Single Phase 2 Wire Earth MD1800C45UK 230 240V ac 50 Hz 13 0A Single Phase 2 Wire Earth MD1800C25EX 220 230V ac 50 Hz 14 2A Single Phase 2 Wire Earth Power Output MD0750 750W IEC 705 o MD1000 1000W IEC 705 Microwave 100 MD1400 1400W IEC 705 MD1800 1800W IEC 705 External Dimensions Height 335mm Plus 50mm minimum clearance above Width 510mm Plus 50mm minimum clearance each side Depth 415mm Plus 50mm clearance behind Internal Dimensions Height 210mm Width 330mm Depth 330mm Capacity 23 litres 0 81 ft Weight Nett 30kg Gross packed 35kg Construction Cavity amp Casework 304 Stainless Steel Settings Microwave 100 75 50 progressive Defrost Timer Up to 9 minutes 59 seconds Up to 3 cooking s
21. vered by the warranty and can be purchased by contacting Merrychef Service Dept MD Series Ovens 3223329 Issue 6 Page 20 APPENDIX 2 Door interlock details Models before January 2007 MD1000 MD1400 amp MD1800 No Description 1 Outer Handle 3 Inner Handle 9 Door Catch 2 10 Door Catch Link Rod 11 Door Spring 13 Door Catch Crank Interlock Switch Holder 66 a d Microswitch V5S010CB 67 Fuse Cover 68 Spring 1 69 Spring 2 70 Top Lever 71 Middle Lever o 72 Bottom Lever Part No 30M0001 30M0003 30M0009 30M0010 30M0011 30M0013 30M0065 3021176 2021080 30M0068 30M0069 30M0070 30M0071 30M0072 MD Series Ovens 3273329 Issue 6 Page 21 Manual corrections and modifications Whilst every effort has been made to ensure that the information contained in this manual is accurate and complete if you believe that an error has been made or if you have any suggestions for how the manual could be improved please fill in and return this form A review of any forms returned will be made on a regular basis and the manual will be updated if required Page on which error occurs MD 1800 Description of error Suggestion for improvement to manual Please return this form to Service Department Merrychef Ltd Station Road West Ash Vale Aldershot Hampshire GU12 5XA Or Fax it on 44 0 1252 371007 E Mail quality merrychef com MD Series Ovens 32 3329 Issue 6 Page 22
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