Merrychef EIKON E4S Service Manual

Download

Page 1

eikon

Service & Parts Manual

WARNING MICROWAVE EMISSIONS

DO NOT BECOME EXPOSED TO EMISSIONS FROM THE MICROWAVE GENERATOR OR PARTS CONDUCTING MICROWAVE ENERGY.

Service & Parts Manual original instructions

Part Number 32Z3870 GB

Issue 4

Page 2

SYMBOLS

The symbols below are used, where applicable, as visual guidance throughout this manual.

The relevant safety precautions MUST be observed and implemented at all times.

DANGER!

This symbol is shown if there is a immediate risk of severe personal physical injury or death.

WARNING

This symbol is shown if there is a possible risk of severe personal physical injury.

CAUTION

This symbol is shown if there is a possible risk of personal physical injury.

NOTICE

This lettering is shown if damage may occur to the equipment.

INFORMATION

This symbol is used to highlight useful or important information. For example: The manual consists of main sections (tab markers on the extreme left and right of the pages), followed by the main subject heading, sub-headings and text. Text with a reference number or letter, such as (1) refers to the same reference on the image.

Service & Parts Manual original instructions

Part Number 32Z3870 GB

Issue 4

Page 3

CONTENTS

SAFETY & REGULATIONS

1 SAFETY REQUIREMENTS 4

PRODUCT DETAILS

2 PRODUCT OVERVIEW & FUNCTIONS 5

3 MAIN FEATURES 6

4 TECHNICAL SPECIFICATIONS 7

4.1 Specications 7

4.2 Serial Number (Rating Plate) 7

4.3 Compliances 7

5 INSTALLATION 9

6 ELECTRICAL INSTALLATION 10

7 ELECTRICAL INSTALLATION GUIDE 11

7.1 Phase Loading 11

8 OVEN CONTROL SETTINGS 12

8.1 Oven mode/navigation settings (A) 12

8.2 Language options (B) 12

8.3 Oven temperature settings and labels (C) 12

8.4 Recipe counters (E) 13

8.5 Date and Time settings (F) 13

8.6 Sound levels (G) 13

8.7 Oven Timer (H) 13

8.8 USB oven programs (J) 14

8.9 Temperature Band (K) 14

8.10 Change Password (L) 14

8.11 Screen saver (M) 14

9 COOLING THE OVEN DOWN BEFORE CLEANING 15

9.1 Oven cool down 15

9.2 Preparing to clean the oven 15

10 COLD OVEN CLEANING INSTRUCTIONS 16

SERVICING

11 SERVICING THE OVEN 17

11.1 Servicing Procedure 17

11.2 Enter Service Mode 17

12 ERRORS & DIAGNOSTICS 18

12.1 ERROR MESSAGES 18

12.2 COPYING ERROR MESSAGES 18

12.3 ERROR LOG 18

12.4 OVEN COUNTERS 18

12.5 VISUAL VIEW 19

13 FIRMWARE UPDATES 20

TESTING COMPONENTS

14 OVEN TESTING 23

14.1 Equipment required 23

14.2 Earth/Insulation Test 23

14.3 Screen Calibration 23

14.4 Oven Tests 24

14.5 Microwave Power Test 24

14.6 Microwave Leakage Test 25

14.7 Temperature Control Test 26

14.8 Soak Test 27

14.9 Recommission Test 27

15 HIGH VOLTAGE COMPONENTS 28

15.1 High Voltage Transformer Test 28

15.2 High Voltage Rectier Test (Diode Board) 28

15.3 High Voltage Capacitor Test 29

15.4 High Voltage Magnetron Test 29

16 MAINS VOLTAGE COMPONENTS 30

16.1 Door Interlock Adjustment 30

16.2 Convection Fan Motor & Controller 31

SPARES & REPLACEMENT

17 OVEN COMPONENTS 32

18 SRB & QTS Circuit Boards 34

18.1 SRB replacement 34

18.2 QTS replacement 34

18.3 PM (Personality Module) replacement 35

19 SPARE PARTS EXPLODED VIEW 36

20 SPARE PARTS 37

21 FAULT FINDING 40

21.1 Operations Communication 40

21.2 Error Code List 41

21.3 Error Code for Re-commission test messages 43

21.4 Normal Messages 43

21.5 Error Messages. The Oven stops operating 43

ELECTRICAL CIRCUITS

22 SRB & QTS Circuit Boards 44

22.1 QTS LEDs 44

22.2 QTS Terminal Locations 44

22.3 SRB LED’s 45

22.4 SRB Terminal Locations: 46

23 CIRCUIT DIAGRAMS 47

23.1 POWER CONNECTIONS e4s 51

23.2 CONTROL CIRCUIT e4s 52

23.3 HEATER CIRCUIT e4s 53

23.4 MICROWAVE CIRCUIT e4s 54

COMMISSIONING

24 Commissioning the oven 55

24.1 Initial installation 55

24.2 After Service 55

SAFETY &

REGULATIONS

DETAILS

PRODUCT

SERVICINGSPARES &

TESTING

COMPONENTS

REPLACEMENT

FAULT FINDINGELECTRICAL

CIRCUITS

Service & Parts Manual original instructions

Part Number 32Z3870 GB

Issue 4

COMMISSIONING

Page 4

REGULATIONS

SAFETY &

1 SAFETY REQUIREMENTS

IMPORTANT INFORMATION  READ CAREFULLY

This manual provides technical guidance for engineers who have successfully undertaken a recognised product familiarisation and training course run by Merrychef to carry out service/repair tasks to the appliance/s shown on the front cover of this manual which must not be used for any other make or model of appliance.

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 or others and to protect the appliance from possible damage, ensure you have read and understand all the relevant instructions and ALWAYS follow the Safety Codes when servicing an oven.

1.0.1 Before attempting to repair the oven, check the oven for microwave emissions using a calibrated microwave emission detector.

1.0.2 Check that the oven is not emitting microwaves, even when supposedly not in operation.

1.0.3 Check that the oven is not operating continuously, whether the display indicates cooking or not.

1.0.4 Never manipulate the mains power lead whilst it is live.

1.0.5 Before removing the oven casing ALWAYS isolate the oven from the mains electricity power supply. Switch o and disconnect the oven plug from the wall socket, turn o isolator switch to disconnect xed wired ovens.

NOTE: The oven switch does not provide adequate protection against electric shock as it does not isolate all of the internal wiring from the mains.

1.0.6 Ensure electrical supply is locked-o to prevent the oven from being inadvertently powered up.

1.0.7 Do not leave the oven unattended without the oven panels tted and keep within sight of other personnel when testing the oven, ensuring persons other than trained engineers are denied access.

1.0.8 The minimum number of panels should be removed and the HT capacitors must be discharged before working on the oven using a suitably insulated 10 MΩ Resistor.

1.0.9 Temporary insulation should be used to prevent accidental contact with dangerous conductors.

1.0.10 Do not touch any internal wiring or connectors within the oven, whether you believe it is live or not and avoid touching the metalwork (casing, panels, etc) of the oven with your body.

1.0.11 Only use electrically rated screwdrivers for adjusting ‘Pots’ etc., ensuring the tool touches nothing else.

1.0.12 Ensure the Test Equipment is set correctly before use.

1.0.13 Test Equipment such as meter test leads or clamps must be tted and removed whilst the unit is dead, for each and every test.

1.0.14 Do not undertake functional Magnetron testing with the oven panels removed.

1.0.15 Avoid touching the Test Equipment, unless necessary for the operation.

IF SMOKE IS OBSERVED

SWITCH OFF THE OVEN  DISCONNECT/ ISOLATE FROM THE ELECTRICAL SUPPLY  KEEP THE OVEN DOOR CLOSED TO STIFLE ANY FLAMES.

DANGER!

BEFORE REMOVING THE OVEN CASING, ISOLATE THE OVEN FROM THE MAINS ELECTRICITY POWER SUPPLY; SWITCH OFF, DISCONNECT OVEN PLUG FROM WALL SOCKET, TURN OFF ISOLATOR SWITCH TO DISCONNECT FIXED WIRED OVENS AND LOCKOFF.

WARNING

ALWAYS DISCHARGE THE HT CAPACITORS BEFORE WORKING ON THE OVEN USING A SUITABLY INSULATED 10M RESISTOR.

1.0.16 Upon completion of a service follow the steps for “Commissioning the oven” under the “Commissioning” section of this manual.

Service & Parts Manual original instructions

Part Number 32Z3870 GB

Issue 4

Page 5

2 PRODUCT OVERVIEW & FUNCTIONS

CONSTRUCTION

Stainless Steel cavity and casework.

CONTROL SYSTEM

Colour touchscreen, icon driven.

Storage for up to 1024 programs with 6 stages per cooking program providing a user instruction for each stage.

USB memory stick data transfer.

Safety system: ensures control area temperature is within limits.

MICROWAVE POWER

Two magnetrons.

Distribution system, rotating active antennae.

Microwave settings, o or 5-100% in 1% increments.

Safety system: agency approved monitored interlock door system, current monitoring and overheat detection for magnetrons.

PRODUCT

DETAILS

CONVECTED HEAT

Temperature settings 0°C o and from 100°C to 275°C in 1° C steps.

Distribution system, recirculating airow impingement.

Convection fan setting, 10-100% in 1% increments.

Safety system: oven cavity overheat detection.

START UP SEQUENCE

With the oven switch in the OFF position and the mains power ON, the QTS & SRB boards boot up. When the oven switch is turned ON the splash screen briey displays oven information and the cabinet cooling fan is activated.

After completing a successful logic test, the safety relay is energised and the oven preheats or displays a preheat temperature choice. Once preheated the oven displays the main menu if in FS mode or a recipe selection if in QSR mode.

HOW IT WORKS

The convection fan pulls air in through the Air Diuser (1) This is then heated and returned to the cavity through the catalyst (2) and impinger plates (3) to produce an even heat pattern in the oven. This heat pattern allows food to cook evenly and produces a crisp golden nish, everytime.

SHUTTING DOWN SEQUENCE

When oven switch is turned OFF the screen displays ‘Shutting Down’ and the cooling fan operates until the cabinet temperature has been suciently reduced (cavity temperature of 50°C).

The safety relay is de-energised and the QTS & SRB boards remain active.

Service & Parts Manual original instructions

Part Number 32Z3870 GB

Issue 4

Page 6

PRODUCT

DETAILS

3 MAIN FEATURES

1 ON/OFF SWITCH

ON (I) activates the oven, OFF (0) switches the oven to standby mode. IT DOES NOT ISOLATE INTERNAL WIRING FROM THE MAINS SUPPLY.

2 CONTROL PANEL

Touch sensitive controls (easyToUCH®) for controlling oven functions, including diagnostics and service mode.

3 USB MenuKey®

A socket, located under the logo, allows a USB MenuKey® to be used to update the cooking programs and oven rmware on the pcb’s.

4 OVEN CAVITY

The oven cavity is mostly constructed from stainless steel panels which must be kept clean to avoid contamination of food products and allow the oven to perform at peak eciency.

5 IMPINGER PLATES (Upper & Lower)

Direct the air in the cavity. They must be cleaned on a regular basis, and kept free of debris.

6 OVEN DOOR

The twin-skinned door has a thermally insulated inner section to lower the surface temperature and incorporates a microwave choke.

7 DOOR SEAL

Provides a tight seal around the door and must be kept clean. The seal must be checked regularly and replaced if worn or damaged.

8 AIR FILTER

The air intake provides cooling air for internal components and must be cleaned daily and must NOT be obstructed. The lter must be in place for the oven to function.

9 STEAM VENT

Vents steam from the oven cavity.

10 HOT AIR FAN

Circulates hot air through the catalytic convertors and oven cavity.

11 RATING PLATE

The rating plate, located on the rear oven cover, states the Model, Serial Number, Electrical Ratings and Manufacturers telephone number.

12 MAINS ELECTRIC POWER CABLE

Located on the rear of the oven and must be replaced if worn or damaged.

13 OH STAT ACCESS BOLT

To reset cavity OH Stat remove bolt to gain access to stat.

Service & Parts Manual original instructions

Part Number 32Z3870 GB

Issue 4

Page 7

4 TECHNICAL SPECIFICATIONS

4.1 Specications

Description unit

Touch screen controls programs

Ambient operating temperature °C/°F

External HxWxD mm

External HxWxD inches

Internal HxWxD mm

Internal HxWxD inches

Cooking chamber Ltr (cu.ins)

Power output microwave Watts

Power output convection kW

Power supply Hz

Power supply V

Power supply kW

Unpackaged oven weight net Kg (lbs)

Sound pressure level dB(A)

e4s

1024

<40/104

591x584x750

23.3x23.0x29.5

218x375x361

8.6x14.8x14.2

29.5 (1800)

1800

3.2

50 or 60

230 (50Hz), 208/240 or 220 (60Hz)

6.2

86.3 (190)

<60

PRODUCT

DETAILS

4.2 Serial Number (Rating Plate)

Serial number: YY MM SITE SERIAL

i.e. 10 06 2130 12345 (1006213012345)

Oven manufactured 2013 in June at Sheeld (UK), production number 12345.

Model Number: MODEL CONVECTION MICROWAVE VOLTAGE HERTZ LEAD PLUG COMMUNICATION VERSION CUSTOMER/ACCESSORY COUNTRY

i.e. e4s S T 30 5 H E U 1 GM EU (e4SST305HEU1GMEU)

model e4s, 3200W, 1800W, 230V, 50Hz, L+N+E(4mm EU), 3-pin plug, USB, 1, General Market, European.

4.3 Compliances

EU Directives

EMC 2004/108/EC

LVD 2006/95/EC

RoHS 2011/65/EU

MD 2006/42/EC

23.0in

584mm

29.5in

750mm

25.3in

643mm

23.3in

14.0in

356mm

591m

Service & Parts Manual original instructions

Part Number 32Z3870 GB

Issue 4

Page 8

PRODUCT

DETAILS

EC Declaration of Conformity

Manufacturer

Manitowoc Foodservice UK Limited

Manitowoc, Provincial Park, Nether Lane, Eccleseld, Sheeld, S35 9ZX

Equipment details

Generic Model Numbers eikon e4s Description Commercial Combination Microwave Oven

Declaration of Conformity with directives and standards

The manufacturer hereby declares that its commercial combination microwave ovens listed above comply with the following directives and standards.

Compliance with Directives

The commercial combination microwave ovens comply with the relevant provisions of the following European Directives EMC 2004/108/EC LVD 2006/95/EC RoHS 2011/65/EU MD 2006/42/EC

Harmonised Standards Applied

The commercial combination microwave ovens comply with the relevant requirements of the following European standards.

• EN 60335-2-90: 2006 +A1 (excluding Annex EE ship board requirements)

• EN 60335-1: 2012

• EN 62233:2008

• EN 55014-2:2009 in accordance with Category IV requirements

Electrostatic discharge IEC 61000-4-2:2008

Radiated RF interference IEC 61000-4-3:2006

Fast transient common mode, AC port IEC 61000-4-4:2004

Mains surge, AC port IEC 61000-4-5:2005

RF current, common mode, AC port IEC 61000-4-6:2008

Mains voltage dips & interruptions IEC 61000-4-11:2004

Flicker IEC 61000-3-11:2000

• EN 55011:2009 Classication: Class A, Group 2

Mains terminal disturbance voltage Table 6

Radiated disturbance, magnetic eld* Table 9

Radiated disturbance, electric eld Table 9

• AS/NZS CISPR 11

Radiated disturbance CISPR 11:2009 Class A Conducted disturbance CISPR 11:2009 Class A

Quality and environmental management

Manitowoc Foodservice UK Limited (Sheeld) employs a quality management system in accordance with EN ISO 9001:2008 and a certied environmental management system in accordance with EN ISO 14001.

Service & Parts Manual original instructions

Part Number 32Z3870 GB

Issue 4

Page 9

5 INSTALLATION

OVEN LOCATION AND POSITIONING

Choose a site away from major heat sources.

DO NOT position so that hot air is drawn in from fryers, grills, griddles, etc.

A heat barrier to the height of the oven must be installed if sited next to a burner, stove or range.

Place the oven on a permanent nonslip/ nonammable at surface that is LEVEL, STABLE and STRONG enough for the oven and contents.

Allow a minimum clearance (A) of 2 inches (50mm) around the oven for hot air to escape.

Allow sucient clearance (B), in front of the oven for the door to open fully.

The air intake is located at the lower front of the oven (1) and it is important that the airow is as cool as possible and not preheated by other appliances such as burners, stoves, ranges, fryers, grills and griddles as this will deteriorate the life and performance of the oven.

Do not ax labels/stickers to oven other than those applied or approved by the manufacturer.

A A

A B

DETAILS

PRODUCT

The oven will not operate without the AIR FILTER correctly tted in place.

HANDLING & STORAGE

When moving an oven always observe and follow national and local requirements for lifting and moving heavy objects. Do not use the oven door handle to lift oven.

When not in use, electrically disconnect the oven and store safely in a dry cool place, do not stack ovens.

5.3.1 OVEN STACKING

Maximum of 2 high using stacking clamps (2), part number ?????.

Service & Parts Manual original instructions

Part Number 32Z3870 GB

Issue 4

Page 10

PRODUCT

DETAILS

6 ELECTRICAL INSTALLATION

DANGER!

THIS APPLIANCE MUST BE EARTHED. FAILURE TO DO SO MAY RESULT IN ELECTRIC SHOCK AND DEATH.

The oven must be connected to a separate electrical supply installed by a qualied and approved electrician.

A suitably rated isolating switch with a 3mm contact gap on all poles should be tted for each oven installed.

Establishments with standard (Type ‘B’) circuit breakers are sensitive to ‘surges’ which occur on switching on freezers, refrigerators and other catering equipment, including microwave ovens. Because of this, we strongly recommend that a separate Type ‘C’ circuit breaker (designed specically for this type of equipment) must be tted. An individual, suitably rated circuit breaker should be tted for each oven installed.

This equipment complies with EN61000-3-11, however, when connecting sensitive equipment to the same supply as the oven, the user should determine in consultation with the supply authority, if necessary, that a low impedance supply is used.

SINGLE PHASE (1)

UK models are tted with a Blue 32Amp Plug to IEC 60309 (EN 60309)

The Circuit Breaker should be rated at 40A (Type C).

TWIN PHASE (2)

Twin Phase models should be connected as shown.

The Circuit Breaker should be rated at 20A/Phase (Type C).

WARNING

HIGH LEAKAGE CURRENT  EARTH CONNECTION IS ESSENTIAL.

EQUIPOTENTIAL

An Equipotential Earth point is provided on the rear panel of the oven for independent Earth (GND) connection.

SINGLE PHASE

BLUE (NEUTRAL)

TWIN PHASE

GREEN & YELLOW (EARTH)

BLUE (NEUTRAL)

GREEN & YELLOW (EARTH)

BROWN (LIVE)

BROWN TO LIVE No.1

BLACK TO LIVE No.2

POWER SUPPLY: EARTH LEAKAGE CIRCUIT BREAKERS

If the oven is connected to an Earth Leakage Circuit Breaker device, this should allow a minimum of 30 milliamperes earth current without interrupting the circuit.

Service & Parts Manual original instructions

Part Number 32Z3870 GB

Issue 4

IF YOU ARE IN ANY DOUBT ABOUT YOUR ELECTRICAL SUPPLY, SEEK THE ADVICE OF A QUALIFIED ELECTRICIAN.

Page 11

7 ELECTRICAL INSTALLATION GUIDE

DANGER!

THIS APPLIANCE MUST BE EARTHED. FAILURE TO DO SO MAY RESULT IN ELECTRIC SHOCK AND DEATH.

The oven must be connected to a separate electrical supply installed by a qualied and approved electrician.

A suitably rated isolating switch with a 3mm contact gap on all poles should be tted for each oven installed.

OTHER

EQUIPMENT

ELECTRICAL

SUPPLY

230V

WARNING

HIGH LEAKAGE CURRENT

EQUIPOTENTIAL

An Equipotential Earth point is provided on the rear panel of the oven for independent Earth (GND) connection.

TWIN PHASE OVEN

Brown

16 Amps

Blue

400V

SINGLE PHASE OVEN

Brown

32 Amps

Blue

PRODUCT

DETAILS

230V

Grey

Earth connection is essential.

Phase Loading Diagram

7.2 Phase Loading

7.1

Oven loading per phase is not equal therefore we recommend that other electrical equipment is connected to L3+ N.

Circuit Breakers

TWIN PHASE

Circuit Breakers should be rated at 20A per Phase

and be Time Delay, Motor Start Type (European Type C).

SINGLE PHASE

Circuit Breakers should be rated at 40A per Phase

and be Time Delay, Motor Start Type (European Type C).

Earth Leakage Circuit:

If the oven is connected to an Earth Leakage Circuit Breaker device, this should allow a minimum of 30 milliamps earth current without interrupting the circuit.

If you are in any doubt about your electrical supply, seek the advice of a qualied electrician.

230V

16 Amps

Black

Yellow/GreenEarth

RED

Rear view of plug

Plug Type:

Three Phase

32Amp

IEC 60309

[EN60309]

L1+ L2+ N+ E

[L3 is not used]

20 Amp

BLUE

Rear view of plug

Plug Type:

Single Phase

32Amp

IEC 60309

[EN60309]

L1+N+E

40 Amp

Service & Parts Manual original instructions

Part Number 32Z3870 GB

Issue 4

Page 12

8 OVEN CONTROL SETTINGS

PRODUCT

DETAILS

1. Select the ‘settings’ symbol from the main menu screen.

2. Enter the password and select OK to display the Settings menu (3) comprising:

A. Oven mode/navigation settings.

B. Language options.

C. Oven temperature settings and labels.

D. Service information and error logs (password required).

E. Recipe counters.

F. Date & time settings.

G. Speaker sound levels.

H. Oven Timer (Temperature/ON/OFF).

J. USB program connection.

K. Temperature Band.

L. Change Settings/Service access passwords.

M. Screen saver.

When nished with a setting, select backspace to return to the main settings menu.

To exit the settings menu, select backspace, a prompt will be displayed to either ‘SAVE’ or ‘DISCARD’ any changed settings (4).

8.1 Oven mode/navigation settings (A)

8.1.1 Select the oven mode/navigation symbol (A) from the ‘Settings’ menu.

8.1.2 Select ‘Quick Serve Mode’ for cooking only, or ‘Full Serve Mode’ for cooking & development programs or ‘Manual Mode’ to manually cook only via the ‘chef’s hat’ symbol.

8.1.3 Select ‘Enable Settings’ to display an ‘unlock’ symbol on the Quick Serve Mode screen to allow access to the ‘Settings’ menu.

1 2

A B

MAGNETRON ENERGY

DELAY

ENERGY SAVING

8.2 Language options (B)

8.2.1 Select the ‘Globe’ symbol (B).

8.2.2 Select the checkbox of the required language/s from the list shown. Select the ‘Enable Globe’ checkbox to display the ‘Globe’ icon in the menu screens to select a preset language.

8.3 Oven temperature settings and labels (C)

8.3.1 To change the oven preheat temperature, select the temperature symbol (C) to display the keypad. Enter the required temperature and select OK.

NOTE: The temperature options screen is only displayed at start up when two or more temperatures are set above minimum.

8.3.2 To change a temperature label, select the label to display the keyboard, enter the required label name and select OK.

For Service information & error logs (D) refer to Servicing.

Service & Parts Manual original instructions

Part Number 32Z3870 GB

Issue 4

Page 13

8.4 Recipe counters (E)

8.4.1 Select the clipboard symbol to display a listing of recipe counters.

8.4.2 If shown, use the arrows (bottom right) to scroll up and down the list.

8.5 Date and Time settings (F)

8.5.1 Select the time/date symbol to display the setting options.

8.5.2 CHANGE THE DATE: Select ‘MONTH’, enter the correct month on the keypad and select OK.

8.5.3 Select ‘DAY’, enter the correct day on the keypad and select OK.

8.5.4 Select ‘YEAR’, enter the correct last two digits of the year on the keypad and select OK.

8.5.5 To display the month rst, followed by the day and year, select the ‘MM-DD-YY’ checkbox.

NOTE: The error logs are recorded using these settings.

8.5.6 CHANGE THE TIME: Select ‘HOUR’, enter the correct hour on the keypad and select OK.

8.5.7 Select ‘MIN’, enter the correct minutes on the keypad and select OK.

8.5.8 Select the day name shown to cycle through to display the correct weekday.

DETAILS

PRODUCT

8.6 Sound levels (G)

8.6.1 Select the speaker symbol to adjust the volume level suitable for the environment from none (OFF) to the loudest (100%).

8.6.2 Select music note symbol to set LOW, MED or HIGH tone.

8.6.3 Select the keypad symbol to switch the sound ON or OFF when the touchscreen is pressed.

8.7 Oven Timer (H)

8.7.1 Select the thermometer/timer symbol.

8.7.2 Select the ‘Timer Enabled’ checkbox (green check mark).

8.7.3 Select a weekday using the up/down arrows.

8.7.4 Select an empty ‘Time’ box (maximum of 5 per day) or clear the box using the wipe symbol.

8.7.5 Enter the start time on the keypad and select OK.

8.7.6 Select an empty ‘Temperature’ box opposite the time box displaying the time just entered, or clear the box using the wipe symbol next to it.

8.7.7 Enter the cavity temperature required on the keypad and select OK.

NOTE: You can also select zero to turn the heat o. Selecting the red circle symbol will switch the oven OFF.

Service & Parts Manual original instructions

Part Number 32Z3870 GB

Issue 4

Page 14

PRODUCT

DETAILS

8.8 USB oven programs (J)

IMPORTANT: Downloading from a USB will clear all the existing programs.

Check that the key has the correct number/code for the programs you want to load into the oven memory (1 ‘.cbr’ + ‘autoupd.ate’).

8.8.1 With the oven switched o, slide the Merrychef badge (oven front top right) upwards and insert the USB Memory Stick into the slot.

8.8.2 Switch the oven ON.

8.8.3 The les automatically download from the USB showing the progress and conrmation screens for the update.

8.8.4 On completion the oven displays the start up screen, then the thermometer symbol is displayed.

8.8.5 Remove the USB and keep it in a safe place. Reposition the USB cover.

8.9 Temperature Band (K)

8.9.1 Select the ‘Temp Band’ symbol at which the oven controls, e.g. 50°C.

8.9.2 Select the required temperature band checkbox, shown by a green check mark.

NOTE: Although the lowest practical Temp Band should be used, if the set oven temperature falls by more than the selected Temp Band, the ready to cook mode and Temp Band are deactivated until the oven reaches the preheat temperature.

8.10 Change Password (L)

8.10.1 Select the key symbol to change the oven passwords.

8.10.2 Select the oven settings or Service symbol.

8.10.3 Enter the existing password and select OK to conrm.

8.10.4 Enter the new password, select OK.

8.10.5 Conrm new password, select OK.

8.11 Screen saver (M)

8.11.1 Select the ENABLED checkbox to switch the screen saver ON or OFF.

8.11.2 Select the time box below to enter a time delay on the keypad from 1 to 60 minutes before the screen saver starts and select OK to conrm.

Service & Parts Manual original instructions

Part Number 32Z3870 GB

Issue 4

Page 15

9 COOLING THE OVEN DOWN BEFORE CLEANING

9.1 Oven cool down

IMPORTANT: the oven must be cooled down before the cleaning processes are carried out.

1. In Full Serve mode, select the CLEANING symbol from the main menu.

2. In Full or Quick Serve mode, select the blue thermometer symbol to disable heating and start the cooling cycle.

3. Taking all necessary precautions place a suitable container of ice or cold water (to speed up the cooling process) into the hot oven cavity. Select the OK symbol to continue.

4. The cooling progress is displayed and takes approximately 30 minutes. Note that the oven will continue to cool should the door be opened during the cool down procedure.

5. Once the cooling process is complete, carefully remove the cool down pan. The pan and water maybe hot so an oven cloth or gloves should be used.

6. The oven is now ready for cleaning. Select OK on the screen after completing each stage.

DETAILS

PRODUCT

9.2 Preparing to clean the oven

For the oven to operate at peak eciency, the cavity, door, air lter and grease lter 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 eciency of your oven.

Equipment required (not supplied)

● Merrychef® approved oven cleaner

● Merrychef® approved oven protector (optional)

● Heat proof gloves

● Protective rubber gloves

● Non–abrasive nylon scrub pad

● Cleaning towel and cloths

● Eye protection

● Dust mask (optional)

CAUTION

WEAR PROTECTIVE RUBBER GLOVES WHEN CLEANING THE OVEN.

NOTICE

DO NOT USE CAUSTIC CLEANERS ON ANY PART OF THE OVEN OR OVEN CAVITY AS IT WILL CAUSE PERMANENT DAMAGE TO THE CATALYTIC CONVERTERS.

Service & Parts Manual original instructions

Part Number 32Z3870 GB

Issue 4

Page 16

10 COLD OVEN CLEANING INSTRUCTIONS

PRODUCT

DETAILS

Complete COOL DOWN procedure and allow the oven and accessories to cool before commencing cleaning.

NOTICE

DO NOT USE TOOLS. NEVER USE SHARP IMPLEMENTS OR HARSH ABRASIVES ON ANY PART OF THE OVEN.

REMOVE & CLEAN OVEN PARTS

1. Switch o the oven.

2. Remove the air lter at the base of the oven.

3. Open the oven door and remove any cooking trays/rack.

4. Wash all parts in warm soapy water. Wash o using a clean cloth and plenty of clean, warm water. Ensure all components are dry before re-tting them.

5. Dry using a fresh, clean cloth.

CLEAN THE OVEN

1. Remove any spillages with suitable cloth/paper towel.

Use a dry clean brush to remove any food particles from between the oven oor and the inside of the front door.

2. Wear protective rubber gloves and protective glasses following manufacturer’s recommendations. Carefully spray a Merrychef® approved oven cleaner onto all the internal surfaces of the oven except the door seal (A).

DO NOT spray directly into the fan opening at the rear inside of the oven.

3. For dicult areas, leave to soak for 10 minutes with the oven door open.

Use a non–abrasive nylon scrub pad/sponge to clean the cavity, roof and the inside of the door. Do not scrub the door seal or use metallic scourers.

4. Wash o using a clean cloth and plenty of clean warm water and dry using a fresh clean cloth or paper towel. Ensure all components are dry before re-tting them.

5. Replace all the cleaned oven parts.

6. Close the oven door and wipe the outside of the oven with a damp cloth.

7. Now press the green check mark.

NOTICE

DO NOT USE THE OVEN WITHOUT A CLEAN AIR FILTER IN PLACE.

1 2

3 4

APPLY OVEN PROTECTOR

1. Only apply to a clean oven. Spray a Merrychef® approved oven protector onto a sponge.

2. Spread oven protector lightly onto all internal surfaces of the oven avoiding cooking surfaces, fan inlets and outlets.

3. Spread oven protector lightly onto the internal surface of the oven door avoiding the door seal.

4. Close the door and switch on the oven. If the air lter has not been replaced the touch screen will display a warning. Replace the air lter and then press the green check mark.

5. Preheat the oven. Once the oven has reached operating temperature, it will take about 30 minutes to cure the oven protector.

NOTE: Oven protector turns light brown when cured.

Service & Parts Manual original instructions

Part Number 32Z3870 GB

Issue 4

Page 17

11 SERVICING THE OVEN

11.1 Servicing Procedure

11.1.1 Disconnect/isolate the oven from the power supply.

11.1.2 Check the oven is correctly installed as described in the Installation Instructions (“Product Details” section).

11.1.3 Visually check the cleanliness/condition of the power supply/cable/gland, oven casing, cavity and door for signs of wear, damage, distortion etc. If required, refer to the “Spares & Replacement” section.

11.1.4 Complete an ‘Earth/Insulation test’ (“Testing Components” section) on the oven before switching on.

11.1.5 Check the display for Error Messages, if an error is shown, refer to “Errors & Diagnostics” (“Servicing” section).

NOTE: If a rmware update is required, follow the instructions under “Firmware Updates” (“Servicing” section) before continuing with the service procedure.

11.2 Enter Service Mode

1 On start up, tap the top right of the splash

screen to bypass oven preheat.

2 Enter the authorised user password, for

example, MANAGER and select OK to display the ‘Settings’ menu.

3 Select the spanner symbol. 4 Enter the service password, for example SERVICE

on the keyboard and select OK to display the error log, service information and test options.

11.2.1 Check the Error Log for details of any logged oven errors. See “Errors & Diagnostics” (“Servicing” section) for more details.

11.2.2 Check the ‘Oven Counters’ to nd the usage of components and the Controls area temperature within the cabinet (see “Errors & Diagnostics”, “Servicing” sections).

11.2.3 Check the operational performance of the main components using the Visual View (see “Errors & Diagnostics”, “Servicing” sections).

11.2.4 Perform the Oven Tests (see “Testing Components” section). If required refer to the “Spares and Replacement” section for any repairs needed before continuing with the Oven Tests.

11.2.5 Follow the procedures under the “Commissioning” section before commissioning the oven for use.

DANGER!

WARNING

ALLOW OVEN TO COOL. OBSERVE AND FOLLOW ALL SAFETY PRECAUTIONS INCLUDING THOSE DESCRIBED UNDER THE “SAFETY REGULATIONS” SECTION OF THIS MANUAL BEFORE ATTEMPTING A SERVICE OR REPAIR.

WARNING MICROWAVE EMISSIONS

DO NOT BECOME EXPOSED TO EMISSIONS FROM THE MICROWAVE GENERATOR OR PARTS CONDUCTING MICROWAVE ENERGY.

SERVICING

Service & Parts Manual original instructions

Part Number 32Z3870 GB

Issue 4

Page 18

12 ERRORS & DIAGNOSTICS

12.1 ERROR MESSAGES

12.1.1 A description of the type of error is shown. Check for a number following ‘ERROR:’ (A) and refer to the Error Codes (“Fault Finding” section) for more details. The Oven Serial Number, Model, UI (QTS) version and SRB version information is also displayed below.

12.1.2 Clear the error message by power cycling the mains power supply to the oven (not the oven ON/ OFF switch).

12.2 COPYING ERROR MESSAGES

12.2.1 Enter oven settings menu (B) and select the USB symbol.

SERVICING

12.2.2 Slide up the USB cover and insert the USB memory stick.

12.2.3 S elect ‘Upload Files’.

12.2.4 S elect ‘Error Log’.

12.2.5 Select OK to copy the Error Log to the USB memory stick. The upload progress is shown followed by the upload status.

12.2.6 Select backspace 3 times to return to the main menu.

12.2.7 Remove the USB memory stick and replace the USB cover.

12.3 ERROR LOG

12.3.1 Enter Service Mode and select ‘ERROR LOG’ (C) to display a listing of oven component errors. Error details include: component description, error caused, date & time of the error with details of failure and range.

12.3.2 Scroll down the list (if necessary) and select an error from the list to display individual records.

12.3.3 Select backspace to return to the list, again to return to the Service menu.

12.4 OVEN COUNTERS

12.4.1 Select ‘OVEN COUNTERS’ (D) to display the oven component usage and ambient controls area temperature. Details include the number of screen touches, lter cycles, door cycles, total oven, magnetron and heater element power on time and the ambient controls area temperature in the cabinet.

12.4.2 Select backspace to return to the Service menu.

Service & Parts Manual original instructions

Part Number 32Z3870 GB

Issue 4

Page 19

12.5 VISUAL VIEW

12.5.1 Select VISUAL VIEW (E) to check the main oven components. Select a component symbol to switch on (red), select again to increase the level or turn o (green).

12.5.2 Remove the front air intake lter, the colour should change from green to red on the display indicating that the magnetic reed switch circuit for the air intake lter is operating. Replace the lter and the colour should change back to green.

12.5.3 Open the oven door and check the colour changes from green to red on the display to check the door microswitch/interlock circuit is operating. Place door spacers onto the oven door (refer to Door Interlock Adjustment (“Testing Components” section) for details), close the door and check the colour on the display. Green indicates the door adjustment is ok, red indicates that the Door Interlock Adjustment procedure must be completed.

12.5.4 Select the cooling fan and check it’s operating correctly.

12.5.5 Place a microwave safe container of water into the oven, close the oven door and select a magnetron to test the current draw at maximum output, this will time-out after 30 seconds. For dual magnetron models, test the magnetrons individually and together. Using heat proof gloves, remove the container and close the oven door. Individual Magnetron Test. If there is a magnetron error present, then rst reset the error. If during the magnetron test the amps show between

1.1 - 2.2 amps and the error re-occurs after 8 seconds then the failure can be found in the 230V circuit. Refer to the schematics to nd the fault for repair (fuses, SRB, door switches, connections, power supply). If during the magnetron test 0 amp and the error reoccurs after 8 seconds then the failure can be found in the high voltage circuit. Replace HV components (diode, capacitor or magnetron) to nd out the failing component never measure in the HV circuit and disconnect the oven from the main supply before working on the HV circuit also the capacitor has to be discharged.

12.5.6 Select the Convection Fan and check it is operating correctly.

12.5.7 Select the Heating Element, it increases to maximum temperature then cycles (the Convection Fan is on by default). Check the cavity temperature and heater element current draw at maximum are correct.

SERVICING

Service & Parts Manual original instructions

Part Number 32Z3870 GB

Issue 4

Page 20

13 FIRMWARE UPDATES

NOTE: If icons are not displayed on the screen, press in the same positions on screen as the missing icons to select.

13.5.1 Switch on the oven.

13.5.2 Tap the top right of the screen (1) or the same position if it is not displayed to bypass oven preheat.

13.5.3 Enter a password (i.e. “Manager”) and select OK (2) or the same position if the green check mark is not displayed.

13.5.4 Select the USB symbol (3) or the same position if it is not displayed.

13.5.5 Select one of the USB options (4) or the same position if it is not displayed: ‘Firmware’ for QTS & SRB

SERVICING

updates and ‘Recipe’ for Icons. Install the SRB update rst, the QTS update second and Icons third or if you have the Autoupd.ate le present on the USB be aware that all les of your USB will be loaded and overwrites the existing les. Also the Menu les must be saved before uploading les. If you have a menu le on your USB then the menu of the oven will be over written. If you have no menu le on your USB the oven menu stays as is.

13.5.6 Select the rmware to install and select OK (5) to conrm or the same position for the OK (green check mark), if it is not displayed.

13.5.7 The update screen displays the le version and product, select OK (green check mark) to conrm installation (6) or the same position if it is not displayed.

Service & Parts Manual original instructions

Part Number 32Z3870 GB

Issue 4

Page 21

IMPORTANT:

Downloading from a USB will clear all existing programs. Update the ‘SRB’ rst, the ‘QTS’ second and the ‘Icons’ third (found under the USB ‘Recipe’ heading).

13.5.8 Switch on the oven and tap the top right of the screen (1) to bypass the preheat stage.

13.5.9 Enter the password and select OK to display the Settings menu, see (2).

13.5.10 Select the USB symbol (4).

13.5.11 Slide the Merrychef badge (oven front top right) upwards and insert the USB Memory Stick into the slot (3).

NOTICE

DO NOT REMOVE USB DURING DOWNLOAD SEQUENCE AS THIS COULD CORRUPT THE USB DATA.

13.5.12 Once the USB has stopped ashing, select the ‘FIRMWARE’ USB symbol (5).

13.5.13 The current QTS (Touch Screen) & SRB (Smart Relay Board) Firmware versions are displayed at the top left of the screen (6).

SERVICING

SRB FIRMWARE UPDATE

13.5.14 Select the ‘SRB’ le required (7).

13.5.15 Check the le information is correct before selecting OK (8).

13.5.16 Update progress is displayed (9).

13.5.17 Select backspace (10) 3x to return to the USB screen shown (11).

13.5.18 If the rmware versions are far apart an SRB conict could cause an error message (12) to be displayed.

QTS FIRMWARE UPDATE

13.5.19 Select the ‘QTS’ le (13) with the correct le version number. Note; a tinted band over a le name indicates the le is not valid for that oven.

13.5.20 Check the le information shown is correct before selecting OK (14), if not, select ‘X’ and locate the correct le.

13.5.21 The le update progress is displayed (15). At 50% the cooling fan stops operating, after 100% various screen displays appear as the software reboots.

13.5.22 Check the screen shows the correct QTS version was installed (16), if not, repeat the process using the correct le.

13.5.23 Remove the USB and keep in a safe place. Reposition the USB cover.

Service & Parts Manual original instructions

Part Number 32Z3870 GB

Issue 4

Page 22

NOTICE

DO NOT REMOVE USB DURING DOWNLOAD SEQUENCE AS THIS COULD CORRUPT THE USB DATA.

IMPORTANT:

Downloading from a USB will clear all existing programs.

Only use an empty USB memory stick formatted as follows:

A) FAT16 to update from UI QTS-XXXXXXX-V1.2.16

B) FAT16 or FAT32 to update from UI QTS-XXXXXXX-V1.2.17 or later.

SERVICING

Copy the following rmware les to the ROOT directory of the USB memory stick:

● QTS-eX-XXX-VX.X.XX.BIN

● SRB-eX_X_X_XXX.BIN

● VX-APP-eX.CBR

● Autoupd.ATE

For update A) follow all instructions:

For update B) follow the rst 2 instructions:

13.5.24 With the oven switched o, slide the Merrychef badge (oven front top right) upwards and insert the USB Memory Stick into the slot (1).

13.5.25 Switch the oven ON (2).

13.5.26 Tap the top right of the screen (3) to bypass the preheat stage.

13.5.27 Enter the password and select OK to display the Settings menu, see (4).

13.5.28 Select the USB symbol (5).

13.5.29 Select the ‘FIRMWARE’ USB symbol (6).

13.5.30 Select the ‘QTS’ le (7) with the correct le version number. Note; a tinted band over a le name indicates the le is not valid for that oven.

13.5.31 Check the le information shown is correct before selecting OK (8), if not, select ‘X’ and locate the correct le.

13.5.32 The CBR le is checked and the download progress from the USB is displayed (9) followed by the update status and conrmation screens.

13.5.33 The QTS, SRB and Application Icon les then download automatically showing the progress, status and reboot conrmation screens for each le update.

13.5.34 On completion the oven start up screen (10) is displayed showing the updated rmware versions followed by the oven pre-heat temperature screen.

CONFIRMING THE OVEN UPDATE

After an oven update the oven copies les back to the USB memory stick.

13.5.35 Load the les from the USB memory stick to a computer and open the update (UPDATE.txt) le.

13.5.36 An oven update is conrmed below the oven serial number with ‘updated’ following the QTS/SRB rmware and App Icons.

Service & Parts Manual original instructions

Part Number 32Z3870 GB

Issue 4

Page 23

14 OVEN TESTING

14.1 Equipment required

● Portable Appliance Tester (P.A.T.).

● Digital Multi-meter (D.M.M.).

● Megger / similar 500V d.c. resistance meter.

● Microwave detection / leakage meter.

● Temperature reader.

● Continuity meter.

● Door Spacer Kit (Part No. SA1109).

● Microwave safe 600ml glass beaker

● Microwave safe 2 litre container.

DANGER!

THIS APPLIANCE MUST BE EARTHED. FAILURE TO DO SO MAY RESULT IN ELECTRIC SHOCK AND DEATH.

DANGER!

WARNING

ALWAYS DISCHARGE THE HT CAPACITORS BEFORE WORKING ON THE OVEN USING A SUITABLY INSULATED 10M RESISTOR.

WARNING

ALLOW OVEN TO COOL. OBSERVE AND FOLLOW ALL SAFETY PRECAUTIONS INCLUDING THOSE DESCRIBED UNDER THE “SAFETY REGULATIONS” SECTION OF THIS MANUAL BEFORE ATTEMPTING A SERVICE OR REPAIR.

WARNING MICROWAVE EMISSIONS

DO NOT BECOME EXPOSED TO EMISSIONS FROM THE MICROWAVE GENERATOR OR PARTS CONDUCTING MICROWAVE ENERGY.

14.2 Earth/Insulation Test

14.2.1 Disconnect/isolate the oven from the power supply.

14.2.2 Connect the mains lead from the oven to a P.A.T. (Portable Application Tester).

14.2.3 Connect the Earth from the P.A.T. to the oven hinge (A).

14.2.4 Place the P.A.T. in an open area, such as the oor, away from any persons.

14.2.5 Perform a Class 1 test, a PASS indicates the oven Earthing circuit is functioning ok.

14.2.6 If a FAIL is indicated, remove the oven casing and check ALL earth connections before retesting.

14.2.7 NEVER operate an oven that has failed this test as it could be potentially dangerous.

14.3 Screen Calibration

14.3.1 Apply continuous light pressure to the screen while switching the oven on. Continue to hold until the progress bar has completed.

14.3.2 Using a non-abrasive pointer, such as a ball point pen, accurately press the center of each crosshair displayed on the screen. Once calibrated the screen will display the oven information.

TESTING

COMPONENTS

Service & Parts Manual original instructions

Part Number 32Z3870 GB

Issue 4

Page 24

COMPONENTS

TESTING

14.4 Oven Tests

14.4.1 Enter Service Mode (see “Servicing” section).

14.4.2 Select the down arrow to display the individual Oven tests (A) for the oven to perform.

14.5 Microwave Power Test

Measuring the power output:

NOTE: The power output is established under IEC 705 standard method which is only workable in laboratory controlled conditions. Power output is also aected by line voltage under load, so this test is an approximation only.

14.5.1 Ensure the oven is cold, then enter Service mode to bypass oven preheating.

14.5.2 Select Visual View (B) to check the oven cavity temperature reading is as close to 0°C as possible.

1 Fill a microwave safe container (glass or plastic)

with one litre (1.78 pints) of tap water at about 20°C (68°F).

2 Measure and record the water temperature in

the container using a thermometer capable of reading ±0.1 degree increments.

3 Place the container centrally inside the oven. 4 Select ‘Microwave Power Test’ (C) from the

service mode tests (microwave power 100% for 63 seconds, fan minimum).

5 When the countdown has nished, remove the

container from the oven, immediately stir with a plastic implement and measure the water temperature.

6 Calculate the temperature rise of the water (end

temperature minus the start temperature).

The Temperature Rise should be:

21.5°C (42°F) ±10%

If the temperature rise is outside these limits:

● Check the microwave circuit and components (see “Testing Components” section). Replace magnetron and/or HV diode board if required.

Service & Parts Manual original instructions

Part Number 32Z3870 GB

Issue 4

Page 25

14.6 Microwave Leakage Test

Note before measuring:

● Make sure that the survey meter you are using has been calibrated and is suitable for measuring frequencies of 2,450 MHz.

● Do not exceed meter full scale deection, leakage meter should initially be set to the highest scale, then adjusted down as necessary to ensure that low readings are measured on the most sensitive range.

● To prevent false readings, hold the probe on the grip provided and move at 2.5cm/second.

● Always hold the probe at right angles to the oven and point of measurement, ensuring the probe is reading 50mm from the test area.

● The leakage should not exceed 5mW/cm².

Procedure:

14.6.1 Add 275ml of cold water into a 600ml microwave safe container.

14.6.2 Place the 600ml container in the centre of oven and close the door.

14.6.3 Enter Service mode and select ‘Microwave leakage test’ (A) from the oven tests.

14.6.4 Set the leakage meter to the appropriate scale/ range.

14.6.5 Move the survey meter probe across all casework joins and vent areas including those marked in yellow, shown opposite.

14.6.6 When the Magnetron circuit stops after 30 seconds, change the water and re-select the test to continue.

14.6.7 Select the red ‘X’ on the display to stop the test at any time.

14.6.8 Readings must be below 5mW/cm². If a level greater than 5mW/cm² is observed, this should be reported to the Merrychef Service Department immediately, and the oven should not be used.

14.6.9 Notes should be kept of any leakage that is observed in terms of the level and position on the oven. This information should be kept with the service documentation.

TESTING

COMPONENTS

Service & Parts Manual original instructions

Part Number 32Z3870 GB

Issue 4

Page 26

COMPONENTS

TESTING

14.7 Temperature Control Test

Measuring the oven cavity temperature.

NOTE: Re-calibrating the Thermocouple with the SRB is normally only required when the Thermocouple has been replaced or the oven is under or over cooking.

Procedure:

14.7.1 Place the probe of a temperature reader (A) onto a heat sink or a metal plate in the centre of the oven cavity and close the oven door.

14.7.2 Select ‘Temperature Control Test’ (B) from the service mode tests. The oven heats up and cycles at the maximum set point temperature over 30 minutes.

14.7.3 Once the oven is up to maximum temperature check for a stable temperature reading.

14.7.4 Select the red X to nish the test, if necessary.

14.7.5 If the temperature reading is dierent to the maximum set point, scroll up (C) to select TEMP. COMP. (Temperature Compensation) (D) and enter the password.

14.7.6 Enter the gure from the temperature reader on the keypad (E) and select OK to calibrate the SRB to the thermocouple.

14.7.7 Retest to check that the oven cavity temperature reading is the same as the oven maximum set point temperature.

If the temperature reading is unstable:

1 Disconnect and isolate the oven from the

electricity supply.

2 Allow the oven to cool down. 3 Remove the oven casing. 4 Check the cavity temperature sensor wire and

connections.

5 If the wire and connections are ok replace

the cavity temperature sensor (see “Spares & Replacement” section).

6 Replace oven casing, switch ON and retest. 7 If the temperature is still unstable repeat

steps 1 to 3, replace the SRB (see “Spares & Replacement” section), repeat step 6.

NOTE: Reuse the existing PM (Personality Module) on the new SRB (enter Serial No. on reboot).

14.7.8 Repeat the Temperature Control Test procedure.

A B

Service & Parts Manual original instructions

Part Number 32Z3870 GB

Issue 4

Page 27

14.8 Soak Test

Checking the oven cavity integrity.

Procedure:

14.8.1 Place an oven/microwave safe container with approx. 2 litres of water into the oven.

14.8.2 Close the oven door and select ‘Soak Test’ (A) from the Service mode oven tests (maximum oven temperature, 50% microwave power, maximum fan speed).

14.8.3 Run the test (30 minutes), carefully checking the oven casing, joints and door seal for signs of steam or water escaping from the oven cavity.

14.8.4 If necessary, rectify any leaks and repeat the test.

14.8.5 Safely remove the container from the oven.

14.9 Recommission Test

The Recommission tests are performed following the completion of a service or repair to ensure the oven is operational before handing back to the customer.

Some of the tests have a countdown timer where failing to carry out a test within the time limit will cause a test failure and the Recommission test will have to be restarted.

Procedure:

14.9.1 Select ‘Recommission Test’ (A) from the service mode oven tests and follow the on screen instructions to perform the tests. Do not select the red ‘X’unless you want to stop the test.

14.9.2 After a test has successfully passed, select OK to continue.

14.9.3 When all the tests have been successfully performed the display shows the Recommission test has passed, select OK to conrm.

14.9.4 In the event of a Recommission test failure, the detail will be recorded in the Error log. Any error should be rectied and the Recommission test run again.

TESTING

COMPONENTS

Service & Parts Manual original instructions

Part Number 32Z3870 GB

Issue 4

Page 28

15 HIGH VOLTAGE COMPONENTS

COMPONENTS

TESTING

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 lament.

15.1 High Voltage Transformer Test

15.1.1 Disconnect and isolate the oven from the electricity supply.

15.1.2 Allow the oven to cool down.

15.1.3 Remove the oven casing.

15.1.4 Ensure that the High Voltage Capacitor is discharged before commencing work.

15.1.5 Remove all connections from the Power Transformer.

15.1.6 Using a D.M.M., check the resistance of the windings. Results should be as follows:

1 Mains winding between tags, approx. 1.1 Ω 2 High Voltage winding, approx. 60 Ω 3 Filament winding between terminals, less than

1 Ω

15.1.7 Using a Megger, test the insulation resistance between:

● Primary winding and chassis, pass if reading is over 10 MΩ

● Filament winding and chassis, pass if reading is over 10 MΩ

One end of the High Voltage winding is connected to the chassis, so this is not tested.

DANGER!

WARNING

ALWAYS DISCHARGE THE HT CAPACITORS BEFORE WORKING ON THE OVEN USING A SUITABLY INSULATED 10M RESISTOR.

WARNING

ALLOW OVEN TO COOL. OBSERVE AND FOLLOW ALL SAFETY PRECAUTIONS INCLUDING THOSE DESCRIBED UNDER THE “SAFETY REGULATIONS” SECTION OF THIS MANUAL BEFORE ATTEMPTING A SERVICE OR REPAIR.

WARNING MICROWAVE EMISSIONS

DO NOT BECOME EXPOSED TO EMISSIONS FROM THE MICROWAVE GENERATOR OR PARTS CONDUCTING MICROWAVE ENERGY.

15.2 High Voltage Rectier Test (Diode Board)

15.2.1 Disconnect and isolate the oven from the electricity supply.

15.2.2 Allow the oven to cool down.

15.2.3 Remove the oven casing.

15.2.4 Ensure that the High Voltage Capacitor is discharged before commencing work.

15.2.5 Remove all connections from the High Voltage Rectier.

15.2.6 Using a Megger, test for continuity in both directions. Results should be as follows:

● Open circuit both ways - FAIL

● Conducts one-way only - PASS

● Short circuit both ways - FAIL

● Conducts one way, leaks the other - FAIL

Service & Parts Manual original instructions

Part Number 32Z3870 GB

Issue 4

Page 29

15.3 High Voltage Capacitor Test

15.3.1 Disconnect and isolate the oven from the electricity supply.

15.3.2 Allow the oven to cool down.

15.3.3 Remove the oven casing.

15.3.4 Ensure that the High Voltage Capacitor is discharged before commencing work.

15.3.5 Remove all connections from the High Voltage Capacitor.

15.3.6 Using a D.M.M., check for continuity between the terminals. Results should be as follows:

1 Between Terminals, pass if approx. 10 MΩ 2 Between Terminals and case, pass if open circuit.

15.3.7 Using a Megger, test the insulation resistance between the Terminals and case, pass if reading is over 100 MΩ.

TESTING

COMPONENTS

15.4 High Voltage Magnetron Test

15.4.1 Disconnect and isolate the oven from the electricity supply.

15.4.2 Allow the oven to cool down.

15.4.3 Remove the oven casing.

15.4.4 Ensure that the High Voltage Capacitor is discharged before commencing work.

15.4.5 Remove all connections from the High Voltage Magnetron.

15.4.6 Using a Megger check for continuity. Results should be as follows:

1 Filament terminals, pass if 1 Ω or less. 2 Between each lament terminal and the metal

outer case should read open.

Service & Parts Manual original instructions

Part Number 32Z3870 GB

Issue 4

Page 30

16 MAINS VOLTAGE COMPONENTS

COMPONENTS

TESTING

16.1 Door Interlock Adjustment

Located on the door hinges are 3 safety interlock microswitches, to prevent microwave emissions escaping when the oven door is opened:

The Primary (SW3) breaks the electrical supply circuit to the transformers.

The Secondary (SW2) breaks the microwave circuit if the primary fails.

The Monitor switch (SW1) will short out the Microwave circuit blowing the fuse if both Primary and Secondary interlocks fail.

IMPORTANT: in the event that the Monitor switch causes the Microwave circuit fuse to blow, the Secondary (SW2) and Monitor (SW1) microswitches must be replaced due to exposure from high short-circuit currents.

The purpose of the following adjustment procedure is to set the interlock to switch o the Microwave circuit when the door is opened more than 4mm and for the Microwave circuit to operate when the door is closed and the door seal expands.

16.1.1 Door Interlock Adjustment procedure:

16.1.2 Disconnect and isolate the oven from the electricity supply.

16.1.3 Allow the oven to cool down.

16.1.4 Remove the oven casing.

16.1.5 Ensure that the High Voltage Capacitor is discharged before commencing work.

16.1.6 Door Spacer Kit SA1109

1 Position Green 2mm spacers over the top

corners of the door seal and carefully close the door ensuring the spacer is still in position.

2 Slacken the pivot screw. 3 Release the adjusting screws and move the

backplate until microswitch SW3 just activates then secure all screws.

4 Open door to replace the Green 2mm spacers

with Red 4mm spacers and close the door.

5 Slacken the pivot screw. 6 Release the adjusting screws and move the

backplate until microswitch SW2 just activates then secure all screws.

7 Remove the spacers, then open and close the

oven door 5-10 times.

IMPORTANT: CHECK THE SWITCHES OPERATE IN THE FOLLOWING SEQUENCE AS MICROSWITCH SW3 MUST SWITCH THE LOAD CURRENT.

Closing the door:

● SW1 opens rst

● SW2 closes second

● SW3 closes third

Opening the door:

● SW3 opens rst

● SW2 opens second

● SW1 closes third

Service & Parts Manual original instructions

Part Number 32Z3870 GB

Issue 4

OVEN DOOR OPEN

OVEN DOOR CLOSED

SW2

SW1

SW2

SW1

SW3

SW2

SW3

SW1

Page 31

16.2 Convection Fan Motor & Controller

16.2.1 Convection Fan Motor.

The convection motor Is a 3-phase AC motor having a maximum speed of 7200 rpm controlled by a motor speed controller.

The windings are thermally protected and in the event of a thermal fault a trip inside the motor will operate and shut down the motor speed controller.

16.2.2 Motor Controller

Provides a 3-phase AC switched mode drive to the convection motor and is controlled by a 0 - 10 Volt signal from the SRB. This allows the motor to be adjusted from approximately 1500 rpm to 7000 rpm in steps of 5%.

● Door Open, 1500 RPM (20% @ 2V)

● Door Closed (not cooking), 2190 RPM (31% @

3.1V)

● Door Closed (cooking), speed as specied by program or setting up to a Maximum of 7000 RPM, 100% @ 10V)

16.2.3 LED Status display (A):

● Inverter O/No supply, LED OFF.

● Power On/Ready, LED ashes ON/OFF x1 per second.

● Inverter Running, LED ON continuously.

● General Warning, LED ON/OFF x2 per second.

● Fault Condition, LED ON/OFF x10 per second.

Convection Fan Motor & Controller tests:

16.2.4 Disconnect and isolate the oven from the electricity supply.

16.2.5 Allow the oven to cool down.

16.2.6 Remove the oven casing.

16.2.7 Ensure that the High Voltage Capacitor is discharged before commencing work.

16.2.8 Check the following:

1 Electrical supply into motor controller. 2 Three phase connections to motor. 3 Speed Controller connections to SRB. 4 Motor thermal cut-out (short circuit). 5 Motor rotates freely/not seized. 6 Motor winding resistances:

● Blue-Black 3 - 4 Ohms.

● Black-Brown 3 - 4 Ohms.

● Brown-Blue 3 - 4 Ohms.

● Black or Brown or Blue to Earth (Open circuit).

TESTING

L2/N

COMPONENTS

Service & Parts Manual original instructions

Part Number 32Z3870 GB

Issue 4

Page 32

17 OVEN COMPONENTS

DANGER!

WARNING

ALLOW OVEN TO COOL. OBSERVE AND FOLLOW ALL SAFETY PRECAUTIONS INCLUDING THOSE DESCRIBED UNDER THE “SAFETY REGULATIONS” SECTION OF THIS MANUAL BEFORE ATTEMPTING A SERVICE OR REPAIR.

WARNING MICROWAVE EMISSIONS

DO NOT BECOME EXPOSED TO EMISSIONS FROM THE MICROWAVE GENERATOR OR PARTS CONDUCTING MICROWAVE ENERGY.

REPLACEMENT

SPARES &

63 Door oven

80 Microswitch SW1, SW2

69 Stirrer motor assembly

77 Wave guide

41 Overheat stat oven cavity

78 Air intake lter (front)

79 Hinge assembly door RH

16 SRB Smart Relay Board with in-built 1.25A fuse (Located in front of 24V transformer)

10 30Z1488 RFI Filter 30A

86 30Z1534 RFI Filter 20A x 2

84 HV capacitor

77 Wave guide

57 Temperature sensor (Thermocouple) oven cavity

69 Stirrer motor assembly

82 Microswitch SW3

83 Controller convection fan motor

81 Hinge assembly door LH

7 Fuse (20A)

5 Fuse Control circuit (13A) F3

8 Fuse LH Transformer (13A) F4

9 Fuse RH Transformer (13A) F5

Service & Parts Manual original instructions

Part Number 32Z3870 GB

Issue 4

Page 33

51 Magnetron cooling duct RH

11 Magnetron

33 Heater element x2 (connectors shown)

65 Motor assembly convection fan

24 Gland Power supply cable

52 Magnetron cooling duct LH

62 HT Diode

85 Transformer

69 Cooling fan motor

9 Capacitor 1.5µF (Silver) motor start

13 Overheat stat Magnetron

17 QTS Touch Screen PCB

6 Switch oven ON/OFF (rear connection)

40 Speaker unit

27 Ethernet port

SPARES &

REPLACEMENT

Service & Parts Manual original instructions

Part Number 32Z3870 GB

Issue 4

Page 34

18 SRB & QTS Circuit Boards

18.1 SRB replacement

18.1.1 Disconnect and isolate the oven from the electricity supply.

18.1.2 Allow the oven to cool down.

18.1.3 Remove the oven casing.

18.1.4 Ensure that the High Voltage Capacitor is discharged before commencing work.

18.1.5 Taking anti-static precautions, disconnect all connections on the SRB.

18.1.6 Remove the PM (Personality Module) from the SRB and place safely aside.

18.1.7 Release retaining screws and remove the SRB.

18.1.8 Replace SRB and secure retaining screws.

18.1.9 Reconnect all connections to the SRB, for details see “SRB Terminal Locations” (“Electrical Circuits” section).

1 Ensure the thermocouple negative (-)

connection (white) and positive (+) connection (green) are tted the correct way round or the oven temperature readings will be wrong.

2 Ret the PM removed from the old SRB to the

new SRB. Refer to the following PM replacement if a new PM is tted.

18.2 QTS replacement

18.2.1 Disconnect and isolate the oven from the electricity supply.

REPLACEMENT

18.2.2 Allow the oven to cool down.

18.2.3 Remove the oven casing.

SPARES &

18.2.4 Ensure that the High Voltage Capacitor is discharged before commencing work.

18.2.5 Remove the top front panel.

18.2.6 Taking anti-static precautions, disconnect all connections on the QTS.

18.2.7 Remove the PM (Personality Module) (3) from the QTS and place safely aside.

18.2.8 Release the four retaining nuts and remove the QTS assembly (4).

18.2.9 Ret the PM removed from the old QTS to the new QTS. Refer to the following PM replacement if a new PM is tted.

18.2.10 Replace the QTS assembly and secure with the retaining nuts.

18.2.11 Reconnect all connections to the QTS, for details see “QTS Terminal Locations” (“Electrical Circuits” section).

Service & Parts Manual original instructions

Part Number 32Z3870 GB

Issue 4

Page 35

18.3 PM (Personality Module) replacement

The PM on the SRB contains the Firmware. The PM on the QTS contains the Firmware, Oven Serial Number, Temperature Calibration, Cooking Programs, Application Icons and the Recipe Images.

18.3.1 With a new PM tted and casing retted, switch on the oven and tap the screen to hold and check the QTS and SRB versions (1) are the latest release, if not, execute a Firmware update using the latest versions. For details see “Firmware Updates” (“Servicing” section).

18.3.2 Tap the top right of the screen to bypass the preheat stage (2).

18.3.3 Enter the service password and select OK to display the Settings menu, see (3).

18.3.4 Select the USB symbol (4).

18.3.5 Slide the Merrychef badge upwards and insert the USB Memory Stick into the slot (5).

18.3.6 Once the USB has stopped ashing, select the required USB recipe symbol (6).

18.3.7 Select the Application Icons le to download (7).

NOTE: A tinted band over a le name indicates the le is not valid for that oven.

18.3.8 Check the le information shown is correct before selecting OK (8), if not, select ‘X’ and locate the correct le.

18.3.9 When completed, select recipes to load the cooking programs (9). Once the programs are loaded the oven restarts.

18.3.10 Enter the Date & Time settings (10). For details see under ‘Oven Control Settings’ (see “Product Information” section).

18.3.11 Enter the oven serial number (Found on the oven Rating Plate at the rear of the oven)

18.3.12 Turn the oven switch OFF/ON.

18.3.13 Remove the USB and keep in a safe place. Reposition the USB cover.

SPARES &

REPLACEMENT

Service & Parts Manual original instructions

Part Number 32Z3870 GB

Issue 4

Page 36

1288

19 SPARE PARTS EXPLODED VIEW

REPLACEMENT

SPARES &

Service & Parts Manual original instructions

Part Number 32Z3870 GB

Issue 4

Page 37

Recommended Parts List

Part Number

Description

Qty Per

Oven

Unit

1-10

Ovens

11-50

Ovens

51-100

Ovens

1st

Aid/To

Go Box

Service

Centre

Kit

e4s

Unique

Parts

over e4

105005 M3 CAGE NUT 10 EA 10 30 60 30Z0503 SWITCH ON/OFF ROCKER DPST 1 EA 1 2 4 1 1 30Z1177 20 AMP LITTLEFUSE FLM020 2 EA 2 6 12 2 4 30Z1178 30A FUSE HOLDER 2 EA 2 6 12 1 2 30Z1427 MAGNETRON OVERHEAT STAT 2 EA 2 6 12 1 1 30Z1430 MICROSWITCH (LARGE) 1 EA 2 6 12 1 1 30Z1459 MICROSWITCH 2 EA 1 3 6 1 4 30Z1521 e4s MOTOR SPEED CONTROLLER 1 EA 0 1 2 1 1 30Z5009

eikon TOUCH SCREEN & PCB

1EA136 1

30Z5011

CONTROL PCB

e4s SRB

1EA136 1 1 30Z5013 HT DIODE 750mA 2 EA 2 6 12 2 2 2 31Z0115 INSULATOR PAD 2 EA 2 6 12 31Z0186 SILASTIC BLACK (DOOR SEAL) TUBE 1 3 6 1 1 31Z0600 USB ADAPTOR MODULE 1 EA 1 3 6 1 31Z0620 BTS UI SRB CABLE (WHITE) 1 EA 1 3 6 1 1 31Z1252 BOLT M4 X 10 HEX HD FLANGE SS 8 EA 8 24 48 8 31Z1255 PG21 CABLE GLAND BLACK 1 EA 1 3 6 31Z1256 PG21 CABLE GLAND NUT 1 EA 1 3 6 31Z1259 SHEET COVER CAP 12MM DIA 4 EA 4 12 24 32Z4028 HALF SIZE GASTRONOM DISH 1 EA 1 3 6 32Z7075

PERSONALITY MODULE

SRB e4s

1EA136 1 1 32Z7076

PERSONALITY MODULE

QTS e4s

1EA136 1 1 6004011 RUBBER FOOT 0 40 X 25 1 EA 1 3 6 DR0006 REED SWITCH 1 EA 1 3 6 1 1 DR0007 MERRYCHEF BADGE 1 EA 1 3 6 DR0008 MERRYCHEF BADGE SLIDER 1 EA 1 3 6 DR0009 MERRYCHEF BADGE GUIDE 2 EA 2 6 12 DR0011 TOUCHSCREEN OVERLAY 1 EA 1 3 6 1 DR0021 HARMONISED SPEAKER 1 EA 1 3 6 1 DR0030 HANDLE SPACER 2 EA 2 6 12 DR0047 MERRYCHEF BADGE SEAL 1 EA 1 3 6 DR0060 STIRRER COVER - CERAMIC 2 EA 2 6 12 2 2 DR0079 OVEN TEMP STAT 1 EA 1 3 6 1 1 DV0168VIT DOOR CHOKE PRESSED VITREOUS 1 EA 1 3 6 DV0187 TOP PANEL (PRESSED) 1 EA 0 1 2 DV0202 CERAMIC PLATE RETAINER 4 EA 0 1 2 4 DV0370 LOWER IMPINGER HANDLE 1 EA 1 3 6 1 DV0403 CAST REAR DUCTING LH 1 EA 1 3 6 DV0431 DOOR HANDLE 1 EA 1 3 6 DV0437 LOWER FASCIA FINISHED 1 EA 1 3 6 DV0452 CAPACITOR CLIP 2 EA 0 1 2 DV0692 SEAL - CERAMIC COVER 2 EA 2 6 12 2 2 DV0714 e4s WIRE RACK 1 EA 0 1 2 1 DV0773 CAVITY HOT BOX FINISHED 1 EA 1 3 6 1 DV0815 e4s CAVITY THERMOCOUPLE 1 EA 1 3 6 1 1 1 DV0825 e4s CAST RH DUCT MODIFIED 1 EA 1 3 6 1 DV0838 CONTROL PANEL e4/e4s 1 EA 0 1 2 DV0840 e4s RH SIDE PANEL 1 EA 0 1 2 1 DV0841 e4s LH SIDE PANEL 1 EA 0 1 2 1 P30Z1415 MAGNETRON 2M303H 2 EA 0 1 2 1 2 PSA1215 e4s DOOR ASSEMBLY (COMPLETE) 1 EA 1 3 6 1 PSA1240 e4s UPPER IMPINGER PLATE 1 EA 0 1 2 1 PSA1241 e4s HOT AIR MOTOR ASSY KIT 1 EA 1 3 6 1 1

Merrychef eikon e4s Oven

Recommended Minimum Stock Holding & Service Kits

20 SPARE PARTS

Parts list & recommended minimum stock holding & Service Kits

Service & Parts Manual original instructions

Part Number 32Z3870 GB

SPARES &

REPLACEMENT

Issue 4

Page 38

Recommended Parts List

Part Number

Description

Qty Per

Oven

Unit

1-10

Ovens

11-50

Ovens

51-100

Ovens

1st

Aid/To

Go Box

Service

Centre

Kit

e4s

Unique

Parts

over e4

PSA1242 e4s HEATER ASSEMBLY KIT 1 EA 1 3 6 1 1 PSA1243 e4s GASKET KIT 1 EA 1 3 6 1 1 PSA2144 DOOR SKIN ASSY e4 1 EA 0 1 2 PSA2191 e4s IMPINGER PLATE LOW ER 1 EA 1 3 6 1 PSA2195 e4s COOLING FAN ASSEMBLY 1 EA 0 1 2 1 1 PSA2197 e4s DOOR+CHOKE ASSY 1 EA 0 1 2 1 PSA2201 e4s WAVEGUIDE ASSY 2 EA 1 3 6 2 PSA288 STIRRER MOTOR ASSY (PINNED) 2 EA 0 1 2 2 PSA291 STIRRER ASSY (PINNED) 2 EA 0 1 2 2 PSA3113 DOOR SEAL 1 EA 1 3 6 1 1 PSR e4s EIKON DOOR HINGE KIT EA 1 3 6 1 PSR102 EIKON M/SWITCH BRACKET KIT EA 1 3 6 1 SA3114 e4s CAVITY ASSY 1 EA 0 1 2 SA3127 AIR FILTER ASSY e4 1 EA 1 3 6 1 1 SA3132 e4s CAVITY INNER STEAM PIPE 1 EA 1 3 6 1 SA3134 REAR PANEL WELDED ASSY e4s 1 EA 1 3 6 1 SA3136 CAVITY WRAP KIT 1 EA 0 1 2 1 SA3150 e4s LOWER CAT ASSY 1 EA 0 1 2 1 SA3151 e4s UPPER CAT ASSY 1 EA 0 1 2 1 SA3153 e4s AIR DIFFUSER ASSY 1 EA 1 3 6 1 1 1

eikon e4s 230Volts 50Hz - UK/EU - Single Phase - Unique Parts

30Z0231 FUSEHOLDER 1in (13A) 3 EA 3 9 18 3 6 30Z0456 FUSE 1in 13A HRC 3 EA 3 9 18 3 6 30Z1425 TRANSFORMER 240V 50/60Hz 1 EA 1 3 6 1 2 30Z1431 1.2uF 2500V CAPACITOR 2 EA 2 6 12 2 2 2 30Z1488 e4s MAINS FILTER 1 EA 1 3 6 1 2 1 P30Z1413 230V 50Hz TRANSFORMER 2 EA 2 6 12 2

POWER SUPPLY LEAD (UK) 3C 1 EA 1 3 6

eikon e4s 230Volts 50Hz - UK/EU - Twin Phase - Unique Parts

30Z0231 FUSEHOLDER 1in (13A) 3 EA 3 9 18 3 6 30Z0456 FUSE 1in 13A HRC 3 EA 3 9 18 3 6 30Z1425 TRANSFORMER 240V 50/60Hz 1 EA 1 3 6 1 2 30Z1431 1.2uF 2500V CAPACITOR 2 EA 2 6 12 2 2 30Z1534 e4s MAINS FILTER 20A 2 EA 2 6 12 1 2 1 P30Z1413 230V 50Hz TRANSFORMER 2 EA 2 6 12 2 SR233 e4s MAINS CABLE AZ 5P 1 EA 1 3 6

Merrychef eikon e4s Oven

Recommended Minimum Stock Holding & Service Kits

eikon e4s 230Volts 50Hz - AZ - Unique Parts

REPLACEMENT

SPARES &

Service & Parts Manual original instructions

Part Number 32Z3870 GB

Issue 4

Page 39

Recommended Parts List

Part Number

Description

Qty Per

Oven

Unit

1-10

Ovens

11-50

Ovens

51-100

Ovens

1st

Aid/To

Go Box

Service

Centre

Kit

e4s

Unique

Parts

over e4

30Z0231 FUSEHOLDER 1in (13A) 3 EA 3 9 18 3 6 30Z0456 FUSE 1in 13A HRC 3 EA 3 9 18 3 6 30Z1425 TRANSFORMER 240V 50/60Hz 1 EA 1 3 6 1 2 30Z1331 1.00uF 2500V CAPACITOR 2 EA 2 6 12 2 2 30Z1488 e4s MAINS FILTER 1 EA 1 3 6 1 2 1 P30Z1230 60HZ TRANS MULTI TAP 2 EA 2 6 12 2

POWER SUPPLY LEAD HE (EU) 1 EA 1 3 6

30Z0285 FUSEHOLDER 1 1/4in (13A) 3 EA 3 9 18 3 6 30Z1331 1.00uF 2500V CAPACITOR 2 EA 2 6 12 2 2 30Z1439 OMRON RELAY 12V 2 EA 2 6 12 1 2 30Z1455 TRANSFORMER LV CLASS 2 1 EA 1 3 6 1 2 30Z1488 e4s MAINS FILTER 1 EA 1 3 6 1 2 1 30Z1507 e4s USA 12A FUSE SLOW/B 3 EA 3 9 18 3 6 3

PLUG & LEAD ASSY (SUBWAY) 1 EA 1 3 6

P30Z1230 60HZ TRANS MULTI TAP 2 EA 2 6 12 2

Merrychef eikon e4s Oven

Recommended Minimum Stock Holding & Service Kits

eikon e4s 220Volts 60Hz - SA - Unique Parts

eikon e4s 208V & 240V 60Hz - USA - Unique Parts

Service & Parts Manual original instructions

Part Number 32Z3870 GB

FAULT FINDING

Issue 4

Page 40

21 FAULT FINDING

21.1 Operations Communication

21.1.1 The oven has 2 main parts being the QTS assembly (Keyboard, Screen, Logic) and the SRB (Relay board to switch and monitor the required operation).

21.1.2 The QTS is the master of the oven and instructs the SRB what to do, in turn the SRB communicates information on the operation back to the QTS.

21.1.3 The QTS and SRB have their own Personality Module tted with the respective software to be able to communicate and work with each other.

21.1.4 The power provision to the QTS and the communication between QTS and SRB is enabled via ONE cable with RJ45 connectors tted.

USB Memory Stick Connection:

21.1.5 Menu loading from USB into the oven (Recipes)

21.1.6 Software loading from the USB to the oven (Firmware)

21.1.7 Error log saving from the oven to the USB (Upload)

21.1.8 Menu copying from the oven to the USB (Upload)

21.1.9 Recipe counter copying from the oven to the USB (Upload)

FAULT FINDING

Service & Parts Manual original instructions

Part Number 32Z3870 GB

Issue 4

Page 41

21.2 Error Code List

Error Code

E 101

E 102

E 103

Error Condition Description Trigger Possible Causes

The current

Magnetron failed to energise

Detects a magnetron is not working correctly

measured by the current sensing transformer was outside of

Failure of component/s in the microwave circuit

tolerance.

If some current >1A, one or more heater elements could have failed. If current measured <1A possible wiring fault stopping power reaching element.

Cooling fan failed. Cooling fan wired incorrectly. Inlet air too hot. Blocked inlet lter.

Heater incorrect current

Ambient overheat >70°C

Detects a heating element is not working correctly

Detects if the controls area is operating above temperature

The current measured by the sensing transformer on the SRB was <1A when heating cycled on or >1A when heating cycled o.

The ambient temperature measured on the QTS and SRB was >70°C

Error Level

Critical

System Response

Display error message until system is power cycled.

Display error message until ambient controls area temperature is below 60°C

E 104

E 105

E 106

E 107

Magnetron / Cavity Overheat

Supply Frequency high / low

Cavity reaches 25°C above setpoint once it has been controlling at setpoint

Communication error

Detects if the cavity and magnetrons are above temperature

Detects if the power supply Frequency is outside specication

Detects if the cavity temperature has risen above limits

No communication can be made between the QTS and SRB

Cavity and magnetron overheat thermostats

The power supply to the oven Frequency sensor on the SRB measures too high / low

The setpoint of the oven was exceeded

Loss of communication between the SBR and QTS

Cooling fan failed.

E103 / E106 not triggering. Failed SRB. Magnetron failure. Wiring / connection fault.

Blocked Inlet lter.

Incorrect mains voltage. Poor internal / external wiring connections. Faulty SRB.

Cavity re. Failed convection fan. No impeller or loose impeller on convection fan.

SRB / QTS connection cable unplugged or damaged. Faulty QTS or SRB.

Critical

Display error message until service call and the magnetron cools down or the cavity stat is reset.

Display error message until system power cycled.

Display error message until system is power cycled.

FAULT FINDING

E 108 QTS PM error

Wrong PM found / no PM found

The QTS or SRB either has an incorrect PM (Personality Module) tted or no PM is tted

The PM has been changed and is incorrect. The PM has been removed.

Service & Parts Manual original instructions

Critical

Part Number 32Z3870 GB

Display error message until system is power cycled.

Issue 4

Page 42

Error Code

Error Condition Description Trigger Possible Causes

Error Level

System Response

E 110

E 111

SRB version conict

Cavity sensor error

E112 SRB Sensor Fail

E 113

Magnetron Fail On without request

SRB rmware version incompatible with QTS version

Cavity sensor broken / unplugged

SRB Ambient temperature sensor failure

Magnetron operates without being requested to do so.

The QTS has found that the rmware running the SRB is not supported.

The controller is reading an open circuit across the thermocouple input

Shorted SRB Temperature sensor

Magnetron current sensed at >1 Amp

Firmware update has been carried out to the QTS and the SRB has not been updated to match.

The thermocouple is not connected. The thermocouple is broken open circuit. Failed SRB.

Shorted Ambient temp sensor on the SRB

Triac, Diode or relay short circuited on SRB

Critical

Display error message until system is power cycled.

Display error message until service call and the magnetron cools down or the cavity stat

Display error message until service call and the magnetron cools down or the cavity stat is reset.

E114

E116

Free – Currently not used

Heater o on request

FAULT FINDING

E117

N/A

N/A Air Filter removed

Magnetron Overheat stat

Oven door open longer than 1 min.

No heater current detected when requested

Mag overheat stat has been triggered as a result of excessive temperature

Oven door open. Oven inoperable.

Air lter not tted. Oven inoperable.

Cavity does not reach 100°C in 30mins

Magnetron stat is open circuit when running microwave

Break in switched feed on SRB

Filter not tted.

Oven heater element failure

Blocked air lters/High environmental temperatures/ Positioning next to heat sources or failed magnetron

Door left open. Failed door switch/s or SRB. Faulty wiring or connection.

Failed reed switch/s or SRB. Faulty wiring or connection.

Critical

Warning

Display error message until service call and the magnetron cools down or the cavity stat is reset.

Display warning message until door is closed.

Display error message until lter replaced.

N/A Screen Frozen

Service & Parts Manual original instructions

Part Number 32Z3870 GB

Issue 4

Touch screen inoperable

Continual pressure of the touch screen

Damaged touch screen/touch screen depress for more than 15 seconds

Warning

Display error message until touch screen press released

Page 43

21.3 Error Code for re-commission test messages

89 Cooling Test Fail

90 Convection Test Fail

91 Turntable Test Fail

92 Heater Test Fail

93 Magnetron Test Fail

94 Filter In Test Fail

95 Filter Out Test Fail

96 Door Closed Test Fail

97 Door Open Test Fail

98 Incomplete Cleaning

21.4 Normal Messages

86 On/O Switch Operated

99 Air Filter Override Accepted by the customer

100 Main Power On, oven connected to the supply Door open (for more than 1 minute)

If ‘Door Open’ message is shown while the door is closed, check the Magnetron 230V circuit power supply, see “Tips for Fault Finding”.

21.5 Error Messages. The oven stops operating

88 Supply Voltage Error (+/- 10% of rated voltage)

101 Magnetron Failed On Request

102 Heater On Without Request

103 Ambient Overheat

104 Magnetron/Cavity Overheat trip, when oven in idle mode, (also see E117)

105 Supply Frequency Error (+/- 2Hz)

106 Cavity Reaches 75°C above set point or 25°C at 275°C

107 Communication Error QTS-SRB

108 QTS PM Error

109 SRB PM Error

110 Incompatible SRB Version

111 Cavity Sensor Failed

112 SRB Board Sensor Failed

113 Magnetron On Without Request

114 Free - Currently Not Used

115 Convection Fan Feedback (Speed controller cable disconnected)

116 Heater O On Request

117 Magnetron/Cavity trip during cook operation cycle (OH-12V gone for > 1sec)

If this OH trip happens in idle mode you get E104.

FAULT FINDING

To reset the error, disconnect the oven from the power supply and re-connect.

Service & Parts Manual original instructions

Part Number 32Z3870 GB

Issue 4

Page 44

22 SRB & QTS Circuit Boards

22.1 QTS LEDs

● Run - Pulsing 1 second ash, indicating that the board has booted up.

● Power - Lit to show that there is a power supply from the SRB.

● P-Bus - Irregular ashing, indicating data communication with SRB.

● C-Bus - Lit to show data being loaded from the PM onto the QTS.

● LD5 - Lit to show that a USB key is tted.

1 LD5 2 Power, Run, P-Bus, C-Bus.

4 5

22.2 QTS Terminal Locations

3 X6 - Speaker 4 X5 - USB socket 5 X4 - Communications to SRB 6 X11 - Screen backlight 7 X13 - Touch pad 8 X9 - Display Screen PCB

ELECTRICAL

CIRCUITS

Service & Parts Manual original instructions

Part Number 32Z3870 GB

Issue 4

Page 45

22.3 SRB LED’s

● P-Bus - Irregular ashing, indicating data communication with QTS.

● Run - Pulsing 1 second ash, indicating that the board has booted up.

● 12v & 5v - Lit to show voltage outputs from inboard transformer.

● Relay & Triac - Lit to show that a signal has been sent to energise that component.

1 Cooling fan. 2 Convection fan. 3 Stirrer. 4 5v supply. 5 12v supply. 6 Heater safety. 7 Heater drive. 8 P-BUS: ashes when data is being sent /

received. RUN: 1 second ash.

9 Oven Door. 10 Microwave safety relay. 11 Microwave 2 drive. 12 Microwave 1 drive. 13 LED (Lit to show that signal is recieved via

overheat trips). if lit it is ok.

ELECTRICAL

CIRCUITS

Service & Parts Manual original instructions

Part Number 32Z3870 GB

Issue 4

Page 46

22.4 SRB Terminal Locations:

1 X3 - Output for e4s Convection Fan Speed

Controller.

2 X101 - Voltage Selection Relay coil feeds.(US

Only)

3 X18b - Air intake Filter Reed Switch. 4 X18e - Right Magnetron Overheat Thermostat. 5 X18d - Left Magnetron Overheat Thermostat. 6 X18c - Cavity Overheat Thermostat. 7 X18a - On/O Switch. 8 X14 - Cavity Temperature Thermocouple.

9 X5 - Fan RPM Input. 10 X13 - P Bus, Ethernet Port. 11 X12 - C Bus, Development PC Port. 12 X11 - P/C Bus, BTS Cable. 13 X1 - 24V supply from Low Voltage Transformer. 14 X8 - Cooling Fan. 15 X17 - Not used. 16 X20 - Microwave Stirrers. 17 X9 - Mains Output, Convection Fan Controller. 18 X103.1 - Mains Output to Low Voltage

Transformer.

19 X103 - Mains Input, Live & Neutral. 20 X2.1 - Mains Input, Live for Heaters. 21 X2.2 - Mains Output, Live to Heaters. 22 X102a - Mains Input, Neutral for Magnetron

Transformers & Monitor Door Switch.

23 X102b - Mains Output, Neutral to Magnetron

Transformers & Monitor Door Switch.

24 X4a - Door Switch signal from Secondary Door

Switch (Live for Magnetron Transformers).

25 X10 - Connector Block for door switches. 26 X4b - Live for Magnetron Transformers.

ELECTRICAL

CIRCUITS

Service & Parts Manual original instructions

Part Number 32Z3870 GB

Issue 4

Page 47

3rd ANGLE PROJECTION













1 2

5 6 8

1 2

5 6 8

SW3

N/C

N/O

Secondary Micro Switch

Monitor Micro Switch Primary Micro Switch

Note

Switches Shown in

Door Closed Position

U V W

Convection Fan

Motor Speed Controller

Black

Brow n

Blue

Green

Red

Blue

Mains Filter

On/Off Switch

Blue

Brow n

Black

Blue

Brow n

Cooling Fan

Fuse Rating

US ROW

25 Amp 25 Amp

12 Amp 13 Amp

Fuse

F4 12 Amp 13 Amp

F5 12 Amp 13 Amp

Mains Input

L1 N

E E

Star Delt a

Triac 1A Output

Triac 2A Output

Triac 1A Output

Volt age Selec tion

Relay s Driver

Current Sense Hybri d Relay 1

Triac 16A Output

Safety Relay Aux

Line V oltage M onitorin g

Conv ection F an

0...10V Passive Isolated Output

Safet y Relay H eater

Safety Relay M.W.

Door Switch

Comm on Connect ors Bloc k

Interlock Switches

Power Switc h Feedback

Air Filter Feedback

MCU

Power Supply



12V 5V

Thermocouple

Motor Feedbac k

C/B Bus

C-Bus

P-Bus

2 1

1 2 3

1 2

1 2 3

2 1

1 2 3 4

1 2 3

1 2

Triac Out put Sch

Safety Relay Sch

Line Volt age Monitoring Sch

0—10V-out Sc h

Safety Relay Sch

Lcs Heater

Hybrid Rel ay Sch

Triac Out put Sch

Safety Relay Sch

Lcs MW

Door Switch De tection Sch

Current Sence Sch

Lcs MW

Voltage Selection Relay Driver Sch

Thermocoupl e Input Sch

Power Supply Sc h

Feedback Sch

MCU Sch

Safety Relay Sch

Feedback Sch

C-P Bus Sch

+12V

X102(N)

X2.1

X4a

Ext GND

X3.1 X3.2

X103

Aux

Power

X103.1

X102a

X4a

X2.1

X18b

X18a

X10

X18c

X18d

X18e

SRB Transform er

M.W. Supply

Speed Controll er Rela y Coil

Heater Supply

Neutral In

Inter lock

Swit ch

Conn ector

24VAC Supply

Overh eat Cavit y

Air Filter

On/Off

Overh eat MW1

Cooli ng Fan

X17

X20

Stirrer Motor 1

X2.2

Heater Supply Out

X4b

MW 1

X101

Volt age Selec tion Rel ay MW1

X102b

Neut ral MW1

Interlock switches

Temperature Input

X14

P/C - Bus RJ-45

Coms Modules C - Bus RJ-12

P - Bus RJ-11

BTS

1 2 3

X11

X12

X13

16 17

25 26

71 72

60 61

37 38

NOT USED

73 74

Overh eat MW2

Current Sense

Current Sence Sch

Safety Relay Supply (Heater & MW Only)

66 67 68

Convection Fan

RED (0 - 10V) GREEN - (10V) BLUE - (GND)

Stirrer Motor 2

MW 2

51 52

MW 1

MW 2

Neut ral MW2

Hybri d Relay 2

G N D

1 2 3

X4b wires 30 & 44 being swapped will cause left & right reference to be incorrect in visual view, error messages etc for the magnetrons but will not affect the oven safety.

X102b wires 31, 45 & 21 - common Neutral points as long as the wires have not changed the order is not relevant.

X20 wires 60, 61, 62 & 63 being reversed will not affect the stirrer motor operation.

23 CIRCUIT DIAGRAMS

Service & Parts Manual original instructions

Part Number 32Z3870 GB

Issue 4

CIRCUITS

ELECTRICAL

Page 48













5 6 8

eikon e4s

e4s Wiring Diagram 50/60Hz

DRG.No. 32Z3845

 



First issue

Mains filter change

21/06/201 2

SRB Schematic

23/10/201 2

Concession to wire locations

11/07/201 3

20A Fuses changed to 25A

30/09/201 3

72 71

Magnetron 1

Overheat Stat

Cavity Overheat Stat

N/C

N/O

Secondary Micro Switch

SW2

N/O

N/C

SW1

N/C

N/O

Monitor Micro Switch Primary Micro Switch

Stirrer Motor

Speaker Wire

Auxiliary Transformer

208/240V

24V

16 19

Stirrer Motor

74 73

Magnetron 2

Overheat Stat

77 78

Heater 1.6kW

Blue

Brow n

Black

Blue

Brow n

Cooling Fan

Diode

HV07 - 16

MW 2

230

Diode

HV07 - 16

MW 2

230

MW2 Right Ha nd Side

(From The Front)

MW1 left Hand Side

(From The Front)

50Hz

Diode

HV07 - 16

MW 2

208

240

60Hz

32a

Diode

HV07 - 16

MW 2

208

240

45a

MW2 Right Ha nd Side

(From The Front)

MW1 left Hand Side

(From The Front)

Cooli ng Fan

Stirrer Motor 1

Heater Supply Out

MW 1

Neut ral MW1

Interlock switches

Temperature Input

BTS

NOT USED

Stirrer Motor 2

MW 2

MW 1

MW 2

Neut ral MW2

X4b wires 30 & 44 being swapped will cause left & right reference to be incorrect in visual view, error messages etc for the magnetrons but will not affect the oven safety.

X102b wires 31, 45 & 21 - common Neutral points as long as the wires have not changed the order is not relevant.

X20 wires 60, 61, 62 & 63 being reversed will not affect the stirrer motor operation.

ELECTRICAL

CIRCUITS

Service & Parts Manual original instructions

Part Number 32Z3870 GB

Issue 4

Page 49

1 2

5 6 8

N/C

N/O

Secondary Micro Switch

Switches Shown in

Door Closed Position

Blue

Brow n

Black

Blue

Brow n

Cooling Fan

Cooli ng Fan

Stirrer Motor 1

Heater Supply Out

MW 1

Volt age Selec tion Rel ay MW1

Neut ral MW1

Interlock switches

Temperature Input

Coms Modules

BTS

NOT USED

Stirrer Motor 2

MW 2

MW 1

MW 2

Neut ral MW2

X4b wires 30 & 44 being swapped wil l cause left & right reference to be incorrect in visual view, error messages etc for the magnetrons but will not affect the oven safety.

X102b wires 31, 45 & 21 - common Neutral points as long as the wires have not changed the order is not relevant.

X20 wires 60, 61, 62 & 63 being reversed will not affect the stirrer motor operation.

3rd ANGLE PROJECTION







Speed Controll er Relay Coil







Mains Filters

Mains Input

Fuse

25 Amp 25 Amp

12 Amp 13 Amp

F4 12 Amp 13 Amp

F5 12 Amp 13 Amp

X103

Power

SRB T ransform er

Convection F an

RED (0 - 10V) GREEN - (10V) BLUE - (GND)

Heater Supply

M.W. Supply

Neutral In

Inter lock

Swit ch

Conn ector

24VAC Supply

On/Off

Air Filter

Overh eat Cavit y

Overh eat MW1

Overh eat MW2

Aux

66 67 68

16 17

64 65

20 22 23

18 19

25 26

X18b

X18c

69 70

X18d

71 72

X18e

73 74

X103.1

2 1

1 2 3

X2.1

X4a

X102a

X10

1 2 3

1 2

X18a

1 2 3

1 2

+12V

1 2

Fuse Rating

US ROW

X3.1 X3.2

Ext GND

X2.1

X4a

X102(N)

Safety Relay Sch

Safety Relay Aux

Line Volta ge Monitoring Sch

Line V oltage M onitorin g

0—10V-out Sc h

Conv ection Fan

0...10V Passive Isolated Output

Safety Relay Sch

Safet y Relay H eater

Safety Relay Sch

Safety Relay M.W.

Door Switch De tection Sch

Door Switch

Comm on Connect ors Bloc k

Interlock Switches

Power Supply Sc h

Power Supply



12V 5V

Feedback Sch

Power Switch Feedback

Air Filter Feedback

MCU Sch

MCU

Safety Relay Sch

Safety Relay Supply (Heater & MW Only)

On/Off Switch

Lcs Heater

Lcs MW

Motor Speed Controller

U V W

Black

Brow n

Convection Fan

Triac Output Sch

Triac 1A Output

Triac Output Sch

Triac 2A Output

Triac Output Sch

Triac 1A Output

Current Sence Sch

Current Sense

Current Sence Sch

Current Sense Hyb rid Relay 1

Triac Output Sch

Triac 16A Output

Hybrid Rel ay Sch

Lcs MW

Hybri d Relay 2

Volt age Selec tion

Relay s Driver

Voltage Selection Relay Driver Sch

Thermocoupl e Input Sch

Thermocouple

Feedback Sch

Motor Feedbac k

C-P Bus Sch

C/B Bus

C-P Bus Sch

C-Bus

C-P Bus Sch

P-Bus

Green

Red

Blue

Green

Service & Parts Manual original instructions

Part Number 32Z3870 GB

Issue 4

SW3

Note

X17

2 1

X20

1 2

3 4

62 63

X2.2

X4b

X101

1 2

X102b

X14

1 2 3

P/C - Bus

X11

RJ-45

X12

C - Bus RJ-12

P - Bus

X13

RJ-11

G N D

CIRCUITS

ELECTRICAL

Page 50

5 6 8

N/C

Brow n

Blue

Cooli ng Fan

NOT USED

Stirrer Motor 1

Stirrer Motor 2

N/O

Blue

Brow n

Black

Monitor Micro Switch

Secondary Micro Switch

Cooling Fan

SW1

SW2

N/O

N/C

N/O

50Hz

MW1 left Hand Side

(From The Front)

Cavity Overheat Stat

Speaker Wire

Heater 1.6kW

72 71

First issue

14/05/201 3



Diode

HV07 - 16

11/07/201 3

30/09/201 3





Magnetron 1

Concession to wire locations

Overheat Stat

74 73

20A Fuses changed to 25A

Magnetron 2

Overheat Stat

77 78

208/240V

16 19

Auxiliary Transformer

24V

230

Stirrer Motor

MW2

Heater Supply Out

MW 1 MW 2

MW 1

MW 2

Neut ral MW1

Neut ral MW2

Interlock switches

Temperature Input

ELECTRICAL

CIRCUITS

BTS

X4b wires 30 & 44 being swapped wil l cause left & right reference to be incorrect in visual view, error messages etc for the magnetrons but will not affect the oven safety.

X102b wires 31, 45 & 21 - common Neutral points as long as the wires have not changed the order is not relevant.

X20 wires 60, 61, 62 & 63 being reversed will not affect the stirrer motor operation.

5 6 8

MW2 Right Hand Side

(From The Front)

60Hz

MW1 left Hand Side

(From The Front)

MW2 Right Hand Side

(From The Front)

45a

 



32a



230

208

240

208

240

e4s Twin Ph ase Wiring Diagr am

MW2

Diode

HV07 - 16

MW2

Diode

HV07 - 16

MW2

Diode

HV07 - 16

eikon e4s

DRG.No. 32Z3885







Service & Parts Manual original instructions

Part Number 32Z3870 GB

Issue 4

Page 51

23.1 POWER CONNECTIONS e4s

Product e4s

Single Phase & Neutral Model

Microwave 1800W

Convection heater 3.2kW

Neutral

Live

Heater circuit

Microwave circuit

Control circuit

Heater circuit

Microwave circuit

Control circuit

Product e4s

Twin Phase & Neutral Model

Microwave 1800W

Convection heater 3.2kW

Neutral

L2 (Phase 2)

L1 (Phase 1)

Heater circuit

Control circuit

Heater circuit

Control circuit

Microwave circuit

ELECTRICAL

CIRCUITS

Service & Parts Manual original instructions

Part Number 32Z3870 GB

Issue 4

Page 52

23.2 CONTROL CIRCUIT e4s

ELECTRICAL

CIRCUITS

Service & Parts Manual original instructions

Part Number 32Z3870 GB

Issue 4

Page 53

23.3 HEATER CIRCUIT e4s

Mains Input - L2

RFI Filter

20 Amp

Safety Heater Relay

Relay

SRB Board

x2.1

Input for

Current

Sense

Processor Controlled

x2.2

7829 78

x14.1

x14.2

Temperature

Thermocouple

Heater Element

RFI Filter

Mains Input - L1

7711

CIRCUITS

ELECTRICAL

Service & Parts Manual original instructions

Part Number 32Z3870 GB

Issue 4

Page 54

23.4 MICROWAVE CIRCUIT e4s

Mains Input - L2

RFI Filter

20 Amp

21 22

Microwave Powered

By Safety Supply Relay

x102b x102a

RFI Filter

Safety Relay

RHS SW2

Normally

Open

Door Interlock Switches Shown in

x.10

LHS SW3

Door Open Position so the switches are not activated

Normally

Open

x4a

Current Sense

To SRB E101 Sence

Hybrid

Relay

x4b2

30 44

13 Amp

SRB Board

x4b1

13 Amp

Mains Input - L1

ELECTRICAL

CIRCUITS

MW2

Diode

208

240

Service & Parts Manual original instructions

Part Number 32Z3870 GB

Issue 4

208

240

MW1

Diode

Page 55

24 Commissioning the oven

24.1 Initial installation

1 Unpack the Oven and check for damage. 2 Check Oven Accessories. 3 Check location will provide adequate Ventilation. 4 Locate Oven onto a strong, level, non-ammable

Surface.

5 Remove panels & check all wiring and components for

security.

6 Ret panels. 7 Position the Oven with a minimum air gap of 50mm,

sides & rear.

8 Check Electrical supply and connect. 9 Place a container of water within the oven and switch

it on.

10 Record Model version & check against serial plate. 11 Record QTS (UI) version. 12 Record SRB version. 13 Record Serial Number & check against serial plate. 14 Enter Service Mode. 15 Record Voltage & Frequency. 16 Record Magnetron Current Draw. 17 Check for Microwave leakage. 18 Record Heater current. 19 Check door opening on display. 20 Check lter removal on display. 21 Check fan speed. 22 Turn o the oven and remove the water. 23 Switch on oven and run up to temperature. 24 Operate Oven, Cooking a Standard Batch. 25 Supply User information & contact details to Customer. 26 Instruct Users with an Overview of the equipment,

Operation & Safety (Hazards).

27 Complete Service Report.

24.2 After Service

Complete the following checks after the Oven has been Serviced/Repaired/Tested before connecting to the mains electricity power supply:

24.2.1 All internal electrical connections are correct (see wiring diagrams).

24.2.2 All wiring insulation is correct and is not touching any sharp edges.

24.2.3 All grounding connections are electrically and mechanically secure.

24.2.4 All door safety interlocks are secure and mechanically sound.

24.2.5 The door activates all of the door interlock switches and in the correct order.

24.2.6 The door operation is smooth, and the arms run freely in the slots.

24.2.7 The temperature sensor is correctly connected to the SRB.

24.2.8 The casing is securely retted with no trapped wires.

Before nishing a service call, recheck the following points:

24.2.9 Run the Recommission tests to ensure the oven is functioning correctly and the touch screen is working.

24.2.10 Microwave emissions are below permissible limit of 5mW/cm².

24.2.11 The power output of the oven is checked in accordance with the procedure.

24.2.12 The oven has correct 50mm (2 inches) air gap all round and 50mm (2 inches) above. Air ow should not be restricted.

24.2.13 Complete the Service Report.

Service & Parts Manual original instructions

Part Number 32Z3870 GB

Issue 4

COMMISSIONING

Page 56

Service & Parts Manual original instructions

Part Number 32Z3870 GB

Issue 4

Page 57

Correct disposal of this product (Waste Electrical & Electronic Equipment)

Applicable in the European Union and other European countries with separate collection systems.

This marking shown on the product or its literature indicates that it should

not be disposed with other household wastes at the end of its working life. To prevent possible harm to the environment or human health from uncontrolled waste disposal, please separate this from other types of wastes and recycle it responsibly to promote the sustainable reuse of material resources.

Household users should contact either the retailer where they purchased this product, or their local government oce for details of where and how they can take this item for environmentally safe recycling.

Business users should contact their supplier and check the terms and conditions of the purchase contract. This product should not be mixed with other commercial wastes for disposal.

Service & Parts Manual original instructions

Part Number 32Z3870 GB

Issue 4

Merrychef EIKON E4S Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual