Merrychef Mealstream Service Manual
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Merrychef Mealstream, Page 3 Mealstream Ovens 32Z3387 Issue 2 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 Mealstream range of Combination 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 l
Page 11 Mealstream Ovens 32Z3387 Issue 2 Procedure B - Simplified Power Test You will need: A thermometer capable of reading to ±0.1°C. A Polypropylene tray approximately 200 mm x 200 mm. 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 temper
Merrychef Mealstream, Page 2 Mealstream Ovens 32Z3387 Issue 2 Table of Contents Safety Code ........................................................................... 3 Product Specifications ........................................................... 4 Installation Instructions .......................................................... 5 Error Codes and Diagnostics ................................................ 6 Main F
Page 12 Mealstream Ovens 32Z3387 Issue 2 Procedure D - High Voltage Capacitor 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. 2 Ensure that the High Voltage Capacitor is discharged before commencing work. 3 Remove all connections from the High Voltage
Merrychef Mealstream, Page 18 Mealstream Ovens 32Z3387 Issue 2 INPUT WIRING DETAILS Blue Brown Green/Yellow 48 46 47 No Description SERIES 5 CD² 6 Mains Terminal Block 31Z0149 31Z0149 46 Cable Gland 31Z1070 31Z1070 47 Gland Nut 31Z1082 31Z1082 48 Mains Cable 3 Core 31Z0148 31Z0148 6
Merrychef Mealstream, Page 30 Mealstream Ovens 32Z3387 Issue 2 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. Name Address Page on which error occurs (if applicable) - Mealstream Description of error
Merrychef Mealstream, Page 15 Mealstream Ovens 32Z3387 Issue 2 No Description SERIES 5 CD² 23 Magnetron 30Z0264 30Z0264 24 Resistor 470 R 31Z0121 31Z0121 25 HT diode 30Z0246 31Z0246 26 Capacitor 1.1 µf 30Z0861 30Z0861 27 Transformer 30Z0992 30Z0992 28 Twin blower motor 310110 310110 60 25mm OD Flexible conduit 314402 314402 61 20mm OD Flexible conduit 314401 314401 62 Capacitor clip 31Z0175 31Z0175 23 23 24 25 28 27 24 25 27 26 26 Top view Principle components: 62 60 61
Merrychef Mealstream, Page 7 Mealstream Ovens 32Z3387 Issue 2 a On/Off SWITCH This is used to turn the oven On or Off. IT DOES NOT ISOLATE INTERNAL WIRING FROM THE MAINS SUPPLY . b STEAM OUTLET Allows steam and excess pressure to escape from the oven cavity. It must be kept clear. c OVEN CAVITY The oven cavity is mainly constructed from stainless steel panels. It must be kept clean. d BAFFLE PLATE Forms the inside rear of the oven and covers the hot air circulation fan. This must be cleaned on a regular basis, and kept free of debris. e RUNNERS These are mounted on each side of the oven cavity to support the rectangular racks or oven trays and a
Merrychef Mealstream, Page 8 Mealstream Ovens 32Z3387 Issue 2 a Stage LED's b Program & Time Display c Service Indicator d Air Filter Block Indicator e Convection Pad f Power Pads g Time / Precept Pads h Temperature Set Pads i Cancel / Callback Pad j Program Pad a b c f g i j Electronic controls: Mealstream Series 5 d h e
Merrychef Mealstream, Page 10 Mealstream Ovens 32Z3387 Issue 2 Procedure A - Power Output Test in accordance with BS EN 60335-2-25:1996 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. Note: 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
Merrychef Mealstream, Page 16 Mealstream Ovens 32Z3387 Issue 2 Door, roof & heater element Principle components: No Description 208 240 67 Stirrer glass 40C0954 40C0954 68 Heater element 40C0949 40C0948 69 Element cover plate 790047 790047 70 Baffle ( 2 No. ) 11C0311 11C0311 71 Door seal kit 11C0261 11C0261 72 Door choke 790007 790007
Merrychef Mealstream, Page 6 Mealstream Ovens 32Z3387 Issue 2 Error Codes and Diagnostics The Mealstream Series 5 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. 1 2 3 Door not fully shut. Possible electrical fault Magnetron overheating. Close door fully. Door switch inoperative. Check air filters. Check location, air inlet temperature and air filters. 1 2 3 No time has been set. Invalid time has bee
Merrychef Mealstream, Page 1 Mealstream Ovens 32Z3387 Issue 2 CAUTION MICROWAVE EMISSIONS DO NOT BECOME EXPOSED TO EMISSIONS FROM THE MICROWAVE GENERATOR OR PARTS CONDUCTING MICROWAVE ENERGY SERVICE MANUAL Mealstream SERVICE MANUAL For all Mealstream models manufactured from January 2001 Part No. 32Z3387e Issue No. 2
Merrychef Mealstream, Page 14 Mealstream Ovens 32Z3387 Issue 2 Right side 22 20 17 21 19 18 16 15 No Description SERIES 5 CD² 15 Door arm assembly 11C0300 11C0300 16 Door hinge assembly ( RH )* 11C0166 11C0166 17 Microswitch ( Secondary ) 30Z0240 30Z0240 18 Door arm stop assembly 11C0279 11C0279 19 Door spring 520000 520000 20 Steam pipe 790046 790046 21 Steam vent guard 790061 790061 22 Temperature sensor 50E123 50E123 *See page 16 for parts Principle components:
Page 24 Mealstream Ovens 32Z3387 Issue 2 Part Number Identification Chart: Mealstream series ovens No Description SERIES 5 CD² Part No Page No Part No Page No 29 On/Off Switch 30Z0503 19 30 Control Panel Assembly 11C0294 19 ——— ——— 31 Logic Board 11C0213 19 ——— ——— 32 Relay Board 11C0212 19 �
Merrychef Mealstream, Page 19 Mealstream Ovens 32Z3387 Issue 2 1. Primary Interlock [ 11 , Bottom left-hand ] The Primary switch will cut off the microwave emissions from the oven when the door is opened by breaking the mains supply circuit to the transformers. 2. Monitor [ 14 ,Top left-hand Side ] and Secondary Interlock [ 17 , Bottom right-hand ] Switches. Operate simultaneously. The Monitor switch will produce a short circuit across the mains supply if the Primary interlock switch is faulty, thus blowing the microwave fuse and rendering the oven inoperative. The Secondary interlock switch will cut
Page 22 Mealstream Ovens 32Z3387 Issue 2 Membrane Panel Circuit You will need: A Digital Multi-meter (D.M.M.) 1. Isolate the oven from the mains supply. 2. Remove the Logic Assembly from the Control Panel Housing. 3. Unplug the membrane “tail” from the Logic PCB Assy. 4. Using a D.M.M., check for continuity between the correct terminals when the pads ar
Merrychef Mealstream, Page 5 Mealstream Ovens 32Z3387 Issue 2 Installation Instructions for Mealstream Combination Ovens Power Supply Requirements The Mealstream Series 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, r
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