Anvil MWA1400 Bedienungsanleitung

MWA1400

Service Manual

Commercial Microwave Oven

Caution:

Our ongoing committment to improving performance

and reliability means that parts listed in this manual

may be changed without prior notice.

For service and spare parts enquiries please contact

International Catering Equipment on (02) 8372 0800.

Anvil imported and distributed by

International Catering Equipment

Unit B2, 6-10 Durdans Avenue,

Rosebery NSW 2018 Australia

Ph: +61 2 8372 0800

www.internationalcatering.com.au

20%

POWER

70%

POWER

50%

POWER

TIME

DOUBLE

QUANTITY

STOP

CLEAR

STA RT

+10 SEC

PRECAUTIONS TO BE OBSERVED BEFORE AND

DURING SERVICING TO AVOID POSSIBLE

EXPOSURE TO EXCESSIVE MICROWAVE ENERGY

(a) Do not operate or allow the oven to be operated with the door open.

(b) Make the following safety checks on all ovens to be serviced before activating the magnetron or other micro-

wave source, and make repairs as necessary: (1) Interlock operation, (2) Proper door closing, (3) Seal and

sealing surfaces (arcing, wear, and other damage), (4) Damage to or loosening of hinges and latches, (5)

Evidence of dropping or abuse.

erating compartments, check the magnetron, wave guide or transmission line, and cavity for proper align-

ment, integrity, and connections.

(d) Any defective or misadjusted components in the interlock, monitor, door seal, and microwave generation

and transmission systems shall be repaired, replaced, or adjusted by procedures described in this manual

before the oven is released to the owner.

(e) A microwave leakage check to verify compliance with the federal performance standard should be per-

formed on each oven prior to release to the owner.

TABLE OF CONTENTS

PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOID POSSIBLE

EXPOSURE TO EXCESSIVE MICROWAVE ENERGY ......................................................................................................1

SAFETY AND PRECAUTIONS ...........................................................................................................................................2

1. FOR SAFE OPERATION ..................................................................................................................................2

2. FOR SAFE SERVICE PROCEDURES .............................................................................................................2

SPECIFICATIONS ...............................................................................................................................................................3

EXTERNAL VIEW................................................................................................................................................................4

1. OUTER DIMENSION.........................................................................................................................................4

2. FEATURES DIAGRAM......................................................................................................................................4

3. CONTROL PANEL ............................................................................................................................................5

INSTALLATION ...................................................................................................................................................................7

OPERATIONS AND FUNCTIONS.......................................................................................................................................8

DISASSEMBLY AND ASSEMBLY......................................................................................................................................9

INTERLOCK MECHANISM AND ADJUSTMENT.............................................................................................................16

TROUBLESHOOTING GUIDE ..........................................................................................................................................17

MEASUREMENT AND TEST ............................................................................................................................................21

1. MEASUREMENT OF THE MICROWAVE POWER OUTPUT ........................................................................21

2. MICROWAVE RADIATION TEST ...................................................................................................................22

TEST PROCEDURE ........................................................................................................................................23

WIRING DIAGRAM............................................................................................................................................................24

PRINTED CIRCUIT BOARD..............................................................................................................................................25

1. CIRCUIT CHECK PROCEDURE ....................................................................................................................25

2. PCB CIRCUIT DIAGRAM................................................................................................................................30

EXPLODED VIEW AND PARTS LIST...............................................................................................................................31

DOOR ASSEMBLY .........................................................................................................................................31

CONTROL PANEL ASSEMBLY......................................................................................................................31

GUIDE WIND ASSEMBLY ..............................................................................................................................31

TOTAL ASSEMBLY.........................................................................................................................................31

TABLE OF CONTENTS

CAUTIONS.....................................................................................................................................................................2

INSTALLATIONS ...........................................................................................................................................................3

SERVICE INFORMATION..............................................................................................................................................4

CIRCUIT DESCRIPTION.........................................................................................................................................4

PARTS LIST .........................................................................................................................................................5-6

PARTS DIAGRAM................................................................................................................................................7-8

TOOLS AND MEASURING INSTRUMENTS..........................................................................................................9

MICROWAVE LEAKAGE TEST..............................................................................................................................9

MEASUREMENT OF MICROWAVE POWER OUTPUT.......................................................................................10

DISASSEMBLY AND ADJUSTMENT ................................................................................................................... 11

1. Removing The Door..........................................................................................................................................12

2. Removing The Antenna Stirrer System ............................................................................................................12

3. Removing The Cooling Fan..............................................................................................................................13

4. High Voltage Transformer Removal..................................................................................................................13

5. High Voltage Capacitor And Diode Removal ....................................................................................................13

6. Magnetron Removal .........................................................................................................................................14

7. Removing The Turn Motor ................................................................................................................................14

8. Pcb Assembly Removal....................................................................................................................................14

9. Interlock System ...............................................................................................................................................14

INTERLOCK CONTINUITY TEST.........................................................................................................................15

1. Primary Interlock Switch Test............................................................................................................................15

2. Secondary Interlock Switch Test.......................................................................................................................15

3. Monitor Switch Test...........................................................................................................................................15

COMPONENT TEST PROCEDURE .....................................................................................................................16

TROUBLE SHOOTING .........................................................................................................................................20

• DO NOToperate on a 2-wire extension cord during

repair and use.

• NEVER TOUCHany oven components or wiring during

operation.

• BEFORE TOUCHING any parts of the oven, always

remove the power plug from the outlet.

• For about 30 seconds after the oven stops, an electric

charge remains in the high voltage capacitor. When

replacing or checking, you must discharge the high

voltage capacitor by shorting across the two terminals

with an insulated screwdriver.

•

Remove your watches whenever working close to or

replacing the Magnetron.

• NEVERoperate the oven with no load.

•NEVERinjure the door seal and front plate of the oven

cavity.

• NEVERput iron tools on the magnetron.

• NEVERput anything into the latch hole and the

interlock switches area.

• Proper operation of the microwave oven requires that

the magnetron be assembled to the waveguide and

cavity. Never operate the magnetron unless it is

properly installed.

• Be sure that the magnetron gasket is properly

installed around the dome of the tube whenever

installing the magnetron.

CAUTIONS

Unlike other appliances, the microwave oven is

high-voltage and high-current equipment.

Though it is free from danger in ordinary use,

extreme care should be taken during repair.

THE OVEN IS TO BE SERVICED ONLY

BY PROPERLY QUALIFIED SERVICE

PERSONNEL.

MICROWAVE RADIATION

Personnel should not be exposed to the

microwave energy which may radiate from the

magnetron or other microwave 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.

ANTENNA

COOLING FIN

MAGNETRON

CHASSIS GROUND

FILAMENT

TERMINALS

MAGNETRON

GASKET

CAUTIONS

INSTALLATIONS

INSTALLING

1. Empty the microwave oven and clean inside it with

a soft, damp cloth. Check for damage such as

misaligned door, damage around the door or dents

inside the cavity or on the exterior.

2. Put the oven on a counter, table, or shelf that is

strong enough to hold the oven and the food and

utensils you put in it. (The control panel side of the

oven is the heavy side. Use care when handling.)

3. Do not block the vent and the air intake openings.

Blocking vent or air intake openings can cause

damage to the oven and poor cooking results.

Make sure the microwave oven legs are in place to

ensure proper air ﬂow.

4. The oven should not be installed in any area where

heat and steam are generated, because they may

damage the electronic or mechanical parts of the

unit.

Do not install the oven next to a conventional

surface unit or above a conventional wall oven.

5. Use microwave oven in an ambient temperature

less than 104°F(40°C).

6. Place the microwave oven on 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.

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

IMPORTANT

As the colors of the wires in the mains lead of this

appliance may not correspond with the colored

markings identifying the terminals in your plug,

proceed as follows.

The wire which is colored green-and-yellow must be

connected to the terminal in the plug which is marked

with the letter E or by the earth symbol ( ) or

colored green or green-and-yellow .

The wire which is colored blue must be connected to

the terminal in the plug which is marked with the letter

N or colored black .

The wire which is colored brown must be connected

to the terminal in the plug which is marked with the

letter L or colored red.

BEFORE YOU BEGIN, READ THE FOLLOWING INSTRUCTIONS COMPLETELY AND CAREFULLY.

10cm

The wires in this mains lead are colored in

accordance with the following code:

Green-and-yellow: Earth

Blue: Neutral

Brown: Live

INSTALLATIONS

INSTALLING

1. Empty the microwave oven and clean inside it with

a soft, damp cloth. Check for damage such as

misaligned door, damage around the door or dents

inside the cavity or on the exterior.

2. Put the oven on a counter, table, or shelf that is

strong enough to hold the oven and the food and

utensils you put in it. (The control panel side of the

oven is the heavy side. Use care when handling.)

3. Do not block the vent and the air intake openings.

Blocking vent or air intake openings can cause

damage to the oven and poor cooking results.

Make sure the microwave oven legs are in place to

ensure proper air ﬂow.

4. The oven should not be installed in any area where

heat and steam are generated, because they may

damage the electronic or mechanical parts of the

unit.

Do not install the oven next to a conventional

surface unit or above a conventional wall oven.

5. Use microwave oven in an ambient temperature

less than 104°F(40°C).

6. Place the microwave oven on 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.

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

IMPORTANT

As the colors of the wires in the mains lead of this

appliance may not correspond with the colored

markings identifying the terminals in your plug,

proceed as follows.

The wire which is colored green-and-yellow must be

connected to the terminal in the plug which is marked

with the letter E or by the earth symbol ( ) or

colored green or green-and-yellow .

The wire which is colored blue must be connected to

the terminal in the plug which is marked with the letter

N or colored black .

The wire which is colored brown must be connected

to the terminal in the plug which is marked with the

letter L or colored red.

BEFORE YOU BEGIN, READ THE FOLLOWING INSTRUCTIONS COMPLETELY AND CAREFULLY.

10cm

The wires in this mains lead are colored in

accordance with the following code:

Green-and-yellow: Earth

Blue: Neutral

Brown: Live

INSTALLATIONS

1. OUTER DIMENSION

EXTERNAL VIEW

542 461

329

4 781

11SAFETY INTERLOCK SYSTEM.

22DOOR VIEWING SCREEN - Allows viewing of

food. The screen is designed so that light can

pass through, but not the microwave.

33DOOR HOOK - When door is closed, it will

automatically shut off. If the door is opened

while the oven is operating, magnetron will

immediately stop operating.

44OVEN CAVITY.

55DOOR SEAL - Door seal maintains the

microwave energy within the oven cavity and

prevents microwave leakage.

66PLATE TRAY - Made of special heat resistant

GLASS. Food in a proper receptacle is placed

on this plate for cooking.

77STIRRER COVER - This is located on the ceil-

ing with the stirrer fan.

88INLET COVER - Protect the air hole from

splashes of cooking foods.

2. FEATURES DIAGRAM

GENERAL DETAILS

• The low voltage transformer supplies the necessary

voltage to the micom controller when power cord is

plugged in.

• When the door is closed, the primary switch is ON, the

secondary switch is ON, and the monitor switch opens

(contact COM and NO).

WHEN SELECTING COOKING POWER

LEVEL AND TIME

• The micom controller memorizes the function you set.

• The time you set appears in the display window.

• Each indicator light turns on to indicate that the stage

has been set.

WHEN TOUCHING THE START PAD

• The coil of the relay is energized by the micom

controller.

• Power input is supplied to the high voltage transformer

through the fuse to the primary switch and relay 2.

• Turntable rotates.

• The fan motor rotates and cools the magnetron by

blowing the air (coming from the intake on the

baseplate)

• The air is also directed into the oven to exhaust the

vapor in the oven through the upper plate.

• Cooking time starts counting down.

• 3.2 volts AC is generated from the ﬁlament winding of

the high voltage transformer. This 3.2 volts is applied

to the magnetron to heat the magnetron ﬁlament

through two noise preventing choke coils.

• A high voltage of approximately 2100 volts AC is

generated in the secondary of the high voltage

transformer which is increased by the action of the high

voltage diode and charging of the high voltage

capacitor.

• The negative 4,000 Volts DC is applied 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 of microwave oven as POWER LEVEL.

(refer to page 1-1)

WHEN THE DOOR IS OPENED DURING

COOKING

• Both the primary switch and relay 2 are cut o ﬀprimary

winding voltage of the high voltage transformer.

• ON-OFF of relay 2 is coupled electrically with opening

and closing of the secondary switch.

• When the door is opened, the secondary switch is

opened and when the door is closed, the secondary

switch is closed.

• The cooking time stops counting down.

• Relay stops functioning.

• As the door is opened, if the contact of primary switch

and relay 2 and/or secondary switch fails to open, the

fuse opens due to the large current surge caused by

the monitor switch activation, which in turn stops

magnetron oscillation.

FUSE

TRANS-

FORMER

RELAY 2

MICOM CONTROLLER

SECONDARY

SWITCH

MONITOR

SWITCH

PRIMARY

MONITOR

SWITCH

FUSE

RELAY 2

MICOM CONTROLLER

SECONDARY

SWITCH

PRIMARY

SWITCH

CIRCUIT DESCRIPTION

TRANS-

FORMER

SERVICE INFORMATION

PARTS LIST

Part Code Part Name Qty/unit Positon

12270000000055 Cavity Assembly 1 A00

12270000008244 Thermostat Bracket 1 A13

12570000000005 Plate Cover *Inner Assembly 1 A30

12270000000005 Baseplate 1 B01

12270000006204 Hinge Assembly 1 B03

17270000B56728 + 17170000001145 Control Panel Assembly 1 C00

12170000002937 Control Panel 1 C01

12270000004436 C/Panel Decoration 1 C02

17170000022997 Mi Assembly 1 C18

17170000001145 Membrane Switch 1 C17

12670000000009 Sealing Ring 1 C50

12270000B60274 + 12570000000410 Door Assembly 1 D00

12270000003760 Door Frame Assembly 1 D01

12170000003856 Latch 1 D02

12970000000365 Latch Spring 1 D03

12270000006147 Hinge 1 D04

12170000009513 Door Film 1 D05

12570000000410 Glass Door Screen 1 D06

12170000A31661 Door Panel Assembly 1 D07+D09

12170000009562 Door Gasket 1 D08

12970000000563 Handle Assembly 1 D14

17470000002377 Magnetron 1 E01

17470000007043 H.V.Transformer 1 E05

17470000006823 H.V.Capacitor 1 E06

17470000001016 H.V.Diode 1 E07

17170000004586 Noise Fliter 1 E10

17470000005683 Fuse 1 E11

17470000009104 Integrated Lamp 1 E13

17470000000231 Power Cord 1 E16

17470000009127 Thermostat 1 E35

17470000001481 Thermostat 1 E44

12170000003401 Latch Board 1 L01

12170000007318 Interlock Lever 1 L02

Part Code Part Name Qty/unit Positon

17470000002294 Microswitch 2 L03

17470000002313 Microswitch 1 L04

17470000002444 Main Wire Harness 1 L05

12270000010792 Stirrer Fan Assembly 1 T00

11002014000013 Synchronous Motor 1 T01

12170000003988 Sealing Water Bracket 1 T36

12170000004303 Fan Guide 1 W01

12170000000209 Fan 1 W02

11002017001305 Brushless DC Motor 1 W03

12270000000150 Wind Guide Cover 1 W06

12270000033201 MOUNTING PLATE 1 W17

12270000000158 Wind Guide Cover 1 W20

12270000000176 Lamp Shade 1 Y38

12270000006211 Capacitor Holder 1 Z01

12270000005872 Cover 1 Z24

PARTS LIST

3 4

4 5

2 5 6 7

32 6 7

9 10 11 12

H H

13 14 15 16

PARTS DIAGRAM

3 4

4 5

2 5 6 7

32 6 7

9 10 11 12

13 14 15 16

3 4

4 5

2 5 6 7

32 6 7

9 10 11 12

13 14 15 16

PARTS DIAGRAM

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