Merrychef EIKON E4S Service Manual

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

1

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.

1

2

Service & Parts Manual original instructions

Part Number 32Z3870 GB

Issue 4

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

3

COMMISSIONING

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.

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Service & Parts Manual original instructions

Part Number 32Z3870 GB

Issue 4

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

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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.

13

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Service & Parts Manual original instructions

Part Number 32Z3870 GB

Issue 4

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

7

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.

8

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Part Number 32Z3870 GB

Issue 4

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

1

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 ?????.

2

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Part Number 32Z3870 GB

Issue 4

9

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.

1

SINGLE PHASE

BLUE (NEUTRAL)

2

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.

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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.

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

LOADING

Brown

16 Amps

Blue

400V

SINGLE PHASE OVEN

LOADING

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

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Part Number 32Z3870 GB

Issue 4

11

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

3

A B

D

G

A

B

C

E

F

J

H

4

K

M

L

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.

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Issue 4

C

D

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.

E

DETAILS

PRODUCT

F

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.

G

H

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Part Number 32Z3870 GB

Issue 4

13

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.

J

K

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.

L

M

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Part Number 32Z3870 GB

Issue 4

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.

1

3

2

DETAILS

PRODUCT

4

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.

5

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

15

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

1

2

3

A

4

1

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.

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Part Number 32Z3870 GB

Issue 4

2

3

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!

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

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

1

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Service & Parts Manual original instructions

Part Number 32Z3870 GB

Issue 4

17

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.

A

B

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.

C

D

18

Service & Parts Manual original instructions

Part Number 32Z3870 GB

Issue 4