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Welbilt Merrychef microMD UK, Service Manual

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Service 

manual

Model:

 

microMD UK

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www.merrychef.com

Merrychef

This document is published to be used for 

after sales service only. 
The content is subject to change without prior 

notice.
In interest of user safety the appliance should 

be restored to its original condition and only 

parts identical to those should be applied.

Micro

Summary of Contents for Merrychef microMD UK

Page 1: ...m Merrychef This document is published to be used for after sales service only The content is subject to change without prior notice In interest of user safety the appliance should be restored to its...

Page 2: ...ge Capacitor And Diode Removal___________ 10 Magnetron Removal___________________________________ 10 Removing The Turn Motor_____________________________ 10 High Voltage Transformer Removal___________...

Page 3: ...he door seal and front plate of the oven cavity Never put iron tools on the magnetron Never put anything into the latch hole and the interlock switches area Microwave radiation Personnel should not be...

Page 4: ...n a sturdy and flat surface at least 10 cm 4 inches from the wall 7 Place the microwave oven as far away as possible from TV radio computer etc to prevent interference Important The wires in this main...

Page 5: ...pplied to the filament of the magnetron When the oven is set at any level except maximum The micom controller controls the ON OFF time of relay 2 by the applied signal to vary the average output power...

Page 6: ...ion levels at no cost to the owner and should ascertain the cause of the excessive leakage The service personnel should instruct the owner not to use the unit until the oven has been brought into comp...

Page 7: ...mW cm2 sq Notes when measuring Do not exceed meter full scale deflection The test probe must be removed no faster than 1 inch sec 2 5 cm sec along the shaded area otherwise a false reading may result...

Page 8: ...s the temperature rise The initial and final water temperatures are selected so that the maximum difference between the final water temperature and the ambient temperature is 5 K The microwave power o...

Page 9: ...After replacing the door be sure to check that the primary switch monitor switch and secondary switch operate normally 2 After replacing the door check for microwave energy leakage with a survey mete...

Page 10: ...turntable motor 1 Disconnect the wire and remove the turntable motor on the top of the cavity 2 Turn the whole unit over 90 degrees Loose screw and remove the bottom cover 3 Disconnect the wire and t...

Page 11: ...nect the leadwire from magnetron high voltage transformer and capacitor 3 Remove the screw holding the high voltage transformer to the baseplate 1 The inner cover needs to be removed to repair the bot...

Page 12: ...bly Mount the latch board to the oven assembly Adjust the latch board in the arrow direction so that oven door will not have any play in it when the door is closed Tighten the mounting screw Check for...

Page 13: ...nals of the switch The meter should indicate a open circuit in the door open condition When the door is closed meter should indicate a closed circuit When the secondary switch operation is abnormal ma...

Page 14: ...ter in container in the oven Components Test procedure Results High voltage transformer Wire leads removed 1 Measure the resistance Ohm meter scale Rx1 Primary winding Secondary Filament winding 2 Mea...

Page 15: ...scale Rx1000 Terminal to terminal Normal Momentarily indicates several ohms and then gradually returns to 10M ohms Measure the resistance Ohm meter scale Rx1000 Terminal to case Normal High voltage di...

Page 16: ...improper switch operation replace the defective switch and the fuse at the same time Replace just the fuse if the switches operate normally Thermal cut out Below specified temperature Above specified...

Page 17: ...or several Turntable motor Wire leads removed Measure the resistance Ohm meter scale Rx1000 Normal Approx 100 200K Abnormal or several Notes A microwave leakage test must always be performed when the...

Page 18: ...ing on this panel to discharge any static charge built up in your body Condition Cause Remedy Inserting many plugs into one plug outlet and using them at the same time causes overloading Using metalli...

Page 19: ...y Loose connection Replace PCB assembly Replace PCB assembly Connect them tightly 1 Incomplete segments Segment missing Partial segment missing Digit ickering NOTE Slight ickering is normal 2 Colon do...

Page 20: ...Shorted contact at the primary switch Defective high voltage capacitor Defective high voltage transformer Replace primary and monitor switches Replace high voltage capacitor Replace high voltage trans...

Page 21: ...e fan motor Replace oven lamp No continuity Continuity Abnormal Check oven lamp Normal No continuity Abnormal Check fan motor Check continuity of secondary switch with door closed Continuity Defective...

Page 22: ...gh voltage diode Defective magnetron Replace high voltage transformer Replace high voltage capacitor Replace high voltage diode Replace magnetron No continuity Abnormal Normal Normal Normal Abnormal A...

Page 23: ...rvice manual Model microMD UK Note The manual may update without prior notice Please download the latest version on website https tsp midea com Attached files list 1 Exploded view 2 Spare parts list 3...

Page 24: ...24 Microwave service manual Model microMD UK B01 Exploded view...

Page 25: ...25 Microwave service manual Model microMD UK...

Page 26: ...26 Microwave service manual Model microMD UK Exploded view...

Page 27: ...27 Microwave service manual Model microMD UK...

Page 28: ...ilt offers fully integrated kitchen systems and our products are backed by KitchenCare aftermarket parts and service Welbilt s portfolio of award winning brands includes Cleveland Convotherm Crem Delf...

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