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Midea Digital Grill, Service Manual

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Midea Digital Grill Service Manual Download Page 13

HEATER ELEMENT
(Wire leads removed.)

Measure the resistance.
(Multi-meter scale: Rx1)

Measure the resistance with 500V-100M ohm
insulation resistance meter.

NOTE: Make sure heater is fully cooled when tested.

Normal:
*Grill heater
Approx. 38 ohm
(at 20 ~ 30°C)

Normal: more than 0.5 Mohm

temperature

specified

temperature

Above 

COMPONENTS

TEST PROCEDURE

RESULTS

Below specified

THERMAL CUT-OUT

11

Summary of Contents for Digital Grill

Page 1: ...er sales service only The content are 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 MICROWAVE OVEN MODEL Digital Solo Inverter Digital Grill Inverter MARCH 2018 ...

Page 2: ...y Cord Removal 1 Outer Case Removal 2 3 Control Panel Assembly Removal 4 Door Assembly Removal Assembly Removal Air Guide Assembly Removal Turntable Motor Removal Assembly Removal 10 Interlock System 1 Primary Interlock Switch Test 2 Secondary Interlock Switch Test 3 Monitor Switch Test 5 Orifice 6 7 Magnetron Removal 8 9 PCB ATTACHED FILES LIST ERROR CODE 6 6 6 6 7 7 7 8 8 8 9 9 9 9 10 13 19 20 I ...

Page 3: ...icrowave generating device if it is improperly used or connection All input and output microwave connections waveguide flange and gasket must be secure never operate the device without a microwave energy absorbing load attached Never look into an open waveguide or antenna while the device is energized Proper operation of the microwave oven requires that the magnetron be assembled to the waveguide ...

Page 4: ...inches from the wall 7 Place the microwave oven as far away as possible from TV RADIO COMPUTER etc to prevent interference BEFORE YOU BEGIN READ THE FOLLOWING INSTRUCTIONS COMPLETELY EARTHING INSTRUCTIONS This microwave oven is designed to be used in a fully earthed condition It is imperative therefore to make sure it is properly earthed before servicing WARNING THIS APPLIANCE MUST BE EARTHED IMPO...

Page 5: ...s graduated to 600 cc and place the beaker on the center of the turntable Set the energy leakage monitor to 2450 MHz and use it following the manufacturer s recommended test procedure to assure correct result When measuring the leakage always use the 2 inch 5cm spacer supplied with the probe Operate the oven at its maximum output Measure the microwave radiation using and electromagnetic radiation ...

Page 6: ...le 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 The test probe must be held with the grip portion of the handle A false reading may result if the operator s hand is between the handle and the probe When testing near a corner of the door keep the probe perpendicular to the surface making sure the probe hori...

Page 7: ...al water temperature and the ambient temperature is 5 K 4187 x T 0 55 X T2 T0 X M T T2 Temperature after heating T0 Temperature of bowl M Weight of bowl is measured while the microwave generator is operating at full power Magnetron filament heat up time is not included about 3 sec The water is stirred to equalize temperature throughout the vessel prior to measuring the final water temperature Stirri...

Page 8: ...ve door Assembly 1 Open the door CAUTION Be careful not to damage Door C by screwdriver 3 Lift up and pull the door NOTE 1 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 meter Microwave energy must be below the limit of 5 mW cm2 with a 275 ml water loa...

Page 9: ...ide guide NOTE 1 When removing the magnetron make sure its dome does not hit any adjacent parts or it may be damaged magnetron 2 When replacing the magnetron be sure to install the magnetron gasket in the correct position and be sure that the gasket is in good condition 3 After replacing the magnetron check for microwave leakage with a survey meter around the magnetron Microwave energy must be bel...

Page 10: ...BL 1 INTERLOCK MECHANISM The door lock mechanism is a device which has been specially designed to eliminate completely microwave activity when the door is opened during cooking and thus to prevent the danger resulting from the microwave leakage 2 MOUNTING OF THE PRIMARY MONITOR SECONDARY SWITCHES TO THE LATCH BOARD 3 INSTALLATION AND ADJUSTMENT OF THE LATCH BOARD TO THE OVEN ASSEMBLY Mount the lat...

Page 11: ...r should indicate an closed circuit When the secondary switch operation is abnormal make the necessary adjustment or replace the switch only with the same type of switch MONITOR SWITCH TEST Disconnect the wire lead from the monitor switch Connect the ohmmeter leads to the common COM and normally closed NC terminals of the switch The meter should indicate closed circuit in the door open condition W...

Page 12: ...nt to chassis Normal Less than 1 ohm Normal Infinite COMPONENT TEST PROCEDURE 10 Antenna Gasket Chassis Filament NOTE When testing the magnetron be sure to install the magnetron gasket in the correct position and be sure that the gasket is in good condition FUSE Check for continuity of the fuse with an multi meter NOTE If the fuse is blown check the primary the secondary and the monitor switches be...

Page 13: ...he resistance with 500V 100M ohm insulation resistance meter NOTE Make sure heater is fully cooled when tested Normal Grill heater Approx 38 ohm at 20 30 C Normal more than 0 5 Mohm temperature specified temperature Above COMPONENTS TEST PROCEDURE RESULTS Below specified THERMAL CUT OUT 11 ...

Page 14: ...GRASP THE CONNECTOR NOT THE WIRES 1 3 5 Measure the resistance Ohm meter scale R x 1 Normal Abnormal or several Ω 00 500 1 RELAY 2 RELAY 3 OF P C B Wire leads removed Note Relay Relay 1 Fan motor Turntable motor Oven lamp Relay 2 Microwave Relay 3 Grill Relay 2 Relay 1 Relay 3 Cooking Start OFF Ω Normal Approx 100 200K Abnormal or several Ω Ω L V Transformer of P C B Refer to schemetic diagram Che...

Page 15: ...occurring Inconsistent intensity of microwave by their characteristics 1 Wrap the thinner part with aluminum foil 2 Use plastic wrap or lid 3 Stir once or twice while cooking soup cocoa or milk etc Uneven cooking Ceramic ware trimmed in gold or silver powder is used Avoid using other electrical appliances when you use the microwave oven Insert microwave oven plug securely Use the microwave oven at...

Page 16: ...it flickering NOTE Slight flickering is normal 2 Colon does not turn on or blink 3 A distinct change in the brightness of one or more numbers in display 4 One or more digits in the display are not lighting 5 Display indicates a number different from one touched for example key in 5 and 3 appears in the display 6 Specific numbers for example 7 or 9 will not display when key pad is touched 7 Display doe...

Page 17: ...window does not display any figures and no input is accepted NOTE All these switches must be replaced at the same time Refer to page CONDITION CHECK RESULT CAUSE REMEDY Replace primary and monitor switches Replace primary and monitor switches 8 9 15 2 Fuse does not blow No continuity Continuity Check continuity of power supply cord Defective power supply cord Replace power supply cord Defective gri...

Page 18: ...continuity of secondary switch with door closed Check fan motor Check oven lamp Abnormal Abnormal Normal Defective fan motor Defective oven lamp Replace fan motor Replace oven lamp Loose connection Connection then tightly CONDITION CHECK RESULT CAUSE REMEDY Output is low Lower than 90 of rating voltage Normal Normal Abnormal Abnormal Measure the output power Disconnect the wire leads from relay 2 ...

Page 19: ...n though oven lamp and fan motor run Display operates properly CONDITION CHECK RESULT CAUSE REMEDY 17 Normal Replace the inverter I nverter defective Continuity Output is full when you set lower power level Abnormal Defective P C B assembly Replace P C B assembly Disconnect the wire leads from relay 2 and check continuity relay 2 Operate the unit TROUBLE 6 Oven does not cook properly when programm...

Page 20: ...Abnormal Malfunction the thermostat Replace Thermostat and relay3 Grill No continuity Open or loosen Replace or connect tightly Wire connection NOTE Make sure the wore leads correct position When removing the wire leads from parts be sure to grasp the connector not the wires When removing the magnetron be sure to install the magnetron gasket in the correct position and in good condition TROUBLE 7 ...

Page 21: ...nd last for 8s then the error times add 1 When error times reach 4 the protection will occur E 06 Inverter over power protection The IB signal is 200 and last for 60ms after the initialization E 08 Inverter under power protection The IB signal is less than 50 of the normal output and the AD value is 15 and last for more than 12s Note IB communication line between the magnetron anode and the PCB bo...

Page 22: ...ATTACHED FILES LIST 1 Exploded View 2 Spare Parts List 3 Wiring Diagram Note The manual may update without prior notice Please download the latest version on website https tsp midea com 20 ...

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