Users are cautioned that maintenance and repairs should be performed by a Merrychef authorized service agent using
genuine Merrychef replacement parts. Merrychef will have no obligation with respect to any product that has been
improperly installed, adjusted, operated or not maintained in accordance with national and local codes or installation
instructions provided with the product, or any product that has its serial number defaced, obliterated or removed, or which
has been modified or repaired using unauthorized parts or by unauthorized service agents. For a list of authorized service
agents, please refer to the inside back page of this booklet. The information contained herein ( including design and parts
specifications ) may be superseded and is subject to change without notice.
1
Page 2
PRECAUTIONS TO AVOID POSSIBLE EXPOSURE
TO EXCESSIVE MICROWAVE ENERGY
a) Do not attempt to operate this oven with the
door open since open-door operation can result
in harmful exposure to microwave energy. It is
important not to defeat or tamper with the
safety interlocks.
b) Do not place any object between the oven front
face and the door or allow soil or cleaner
residue to accumalate on sealing surfaces.
It is particularly important that the oven
door closes properly and that there is no
damage to the (1) door ( bent )
(2) hinges and latches ( broken or
loosened ) (3) door seals and sealing
surfaces.
d) The oven should not be adjusted or
repaired by anyone except properly
qualified service personnel
When using electrical appliances basic safety
precautions should be followed, including the following:
WARNING To reduce the risk of burns, electric shock,
fire, injury to persons, or exposure to excessive
microwave energy:
1. Read all instructions before using the appliance.
2. Read and follow the specific “PRECAUTIONS TO
AVOID POSSIBLE EXPOSURE TO EXCESSIVE
MICROWAVE ENERGY” FOUND ON
PAGE 2.
3. This appliance must be grounded. Connect only to a
properly grounded outlet.
See “GROUNDING INSTRUCTIONS” found on page 4.
4. Install or locate this appliance only in accordance
with the provided installation instructions
5. Some products such as whole eggs and sealed
containers — for example, closed jars — may explode
and should not be heated in this oven.
6. Use this appliance only for its intended use as
described in the manual. Do not use corrosive
chemicals or vapors in this appliance. This type of oven
is specifically designed to heat, cook or dry food. It is
not designed for industrial or laboratory use.
7. This appliance should not be used by children.
8. Do not operate this appliance if it has a damaged
cord or plug, if it is not working properly, or if it has
been damaged or dropped.
9. This appliance should be serviced only by qualified
service personnel. Contact the nearest authorized
service facility for examination, repair or adjustment.
10 Do not cover or block any openings on the appliance
including air vents/filters and steam outlet.
11 Do not store this appliance outdoors. Do not use
this product near water —– for example, near a kitchen
sink, in a wet basement, or near a swimming pool, and
the like.
12. Do not immerse the cord or plug in water.
13. Keep the cord away from heated surfaces.
14. Do not let cord hang over edge of table or counter.
15. Either:
i) When cleaning surfaces of door and oven that
come together on closing the door, use only
mild non-abrasive soaps, or detergents applied
with a sponge or soft cloth.
ii) When separate cleaning instructions are
provided, see door surface cleaning
instructions.
16. To reduce risk of fire in the cavity:
i) Do not overcook food. Carefully attend
appliance if paper, plastic or other combustible
materials are placed inside the oven to
facilitate cooking.
ii) Remove wire twist-ties from paper or plastic
bags before placing bag in oven
iii) If materials inside the oven should ignite, keep
oven door closed, turn oven off, and disconnect
the power cord , or shut off power at the fuse or
circuit breaker panel.
iv) Do not use the cavity for storage purposes. Do
not leave paper products, cooking utensils or
food in the cavity when not in use.
17. DO NOT operate using microwave only or
combination function without food or liquid inside the
oven as this may result in overheating and may cause
damage.
18. NEVER remove the exterior of the oven.
19. NEVER remove any fixed internal parts of the
oven.
20. NEVER tamper with the control panel, door, seals,
or any other part oven.
21. DO NOT obstruct air vents/filters or steam outlet.
22. NEVER hang dish towels or cloths on any part of
the oven.
23. If the door seals are damaged, the oven must be
repaired by an approved Service Agent.
24. If the power cable is damaged in any way it MUST
be replaced by an approved Service Agent.
25. When handling hot liquids, foods, and containers,
care should be taken to avoid scalds and burns.
26. When heating liquids using microwave only or
combination function, the contents should be stirred
prior to heating to avoid eruptive boiling.
27. Feeding bottles and baby food jars should be
opened when heating, the contents stirred or shaken
and the temperature checked prior to consumption to
avoid burns.
28. Never use the oven to heat alcohol, e.g. brandy,
rum etc. Also, food containing alcohol can more easily
catch fire if overheated.
29. Never attempt to deep fry in the oven.
SAVE THESE INSTRUCTIONS
3
Page 4
ELECTRICAL INSTALLATION
For all cord connected appliances:
GROUNDING INSTRUCTIONS
This appliance must be grounded. In the event of an electrical short circuit, grounding reduces the risk of
electric shock by providing an escape wire for the electric current. This appliance is equipped with a cord having
a grounding wire with a grounding plug. The plug must be plugged into an outlet that is properly installed and
grounded.
WARNING — Improper use of the grounding can result in the risk of electric shock.
Consult a qualified electrician or Serviceman if the grounding instructions are not completely understood or if
doubt exists as to whether the appliance is properly grounded.
Do not use an extension cord. If the power supply cord is too short, have a qualified electrician or
serviceman install an outlet near the appliance.
For a permanently connected appliance:
GROUNDING INSTRUCTIONS
This appliance must be connected to a grounded, metallic, permanent wiring system, or an equipment grounding conductor should be run with the circuit conductors and connected to the equipment grounding terminal or
lead on the appliance.
POWER SUPPLY: CIRCUIT BREAKERS
If the oven is connected to a ground fault detection device, it is required that the GFP or GFEP will allow a
minimum of 30 milliamps ground current without interrupting the circuit.
In case of Radio or Television Interference
This equipment generates and uses radio frequency energy and if not installed and operated
correctly, in strict accordance with the manufacturer’s instructions, may cause harmful
interference to authorized radio communication services.
It has been type tested and found to comply with the limits for Part 18.307 conducted emissions for nonconsumer equipment and Part 18.305 radiated emissions, which are designed to provide reasonable protection
against such interference. However, there is no guarantee that interference will not occur in a particular
installation. If this equipment does cause interference to radio or television reception, which can be determined
by turning the equipment off and on, the user is encouraged to try and correct the interference by one or more
of the following measures:
1) Re-orientate the receiving antenna.
2) Relocate the microwave with respect to the receiver.
3) Plug the microwave into a different outlet so that the receiver and microwave are on different branch circuits.
If necessary the user should consult the dealer or an experienced radio/television technician for additional
suggestions.
Note: Modifications should only be carried out by the manufacturer or authorized representative to ensure
continuing conformance.
4
Page 5
PRECAUTIONS TO BE OBSERVED
1.Read this manual before using your oven.
2.As with all electrical appliances, it is wise to have the electrical connections
inspected periodically.
3.The oven interior and door seals should be cleaned frequently, following the
instructions described in the CLEANING section.
4.There is no need to switch off your oven after each function but remember to switch
off at the end of the day or period of operation.
5.Microwave energy should not be used to dry linen or warm plates.
6.As with any cooking appliance, care should be taken to avoid combustion of the
items within the oven.
If smoke is observed:
zSwitch off
zIsolate from the electrical supply
zKeep the door closed to stifle any flames
7.Ensure food is placed in the centre of the oven cavity for best results.
8.When using the microwave only function, cover the food to prevent splashing the
walls of the cavity.
9.Food in combustible plastic or paper containers should only be used in microwave
only function and checked frequently to avoid the possibility of ignition.
10. Items should be unwrapped when using convection and combination functions.
11. Eggs and whole hard-boiled eggs should not be heated using the microwave or
combination function as they may explode.
12. Food with a skin, e.g. potatoes, apples, sausages, etc. should be pierced before
heating.
13. Food should not be heated in a completely sealed container as the build-up of
steam may cause it to explode.
14. Excess fat should be removed during ‘roasting’ and before lifting heavy containers
from the oven.
15. In the event of glass breaking or shattering within the oven, ensure that food is
totally free of glass particles. If in doubt, dispose of any food that was in the oven at
the time of the breakage.
5
Page 6
INSTALLATION
Remove packing material and protective film from the oven.
Included inside your oven: Rack
Upper and lower impinger plates
Check for obvious signs of transit damage.
If necessary, inform the freight company IMMEDIATELY.
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.
Position the oven with at least the
minimum clearances shown
Note:
The air intake is located
under each side of the oven,
even with the clearance
specified below it is
important that airflow is as
cool as possible and not preheated by other appliances
such as fryers, grills and
griddles as this will
deteriorate the life and
performance of the oven.
WARNING:
Check that the
AIR FILTERS are in place
prior to operation
( see MAIN FEATURES )
Position the oven with at least the
minimum clearances shown
Dimensions in inches
Place the oven on a flat surface that is LEVEL, STRONG and
STABLE.
Allow a minimum clearance of 2 inches (50mm) to the rear, top and
each side to allow air to circulate freely.
The air intake is located under each side of the oven, even with the
clearance specified above, it is important that airflow is as cool as
possible and not pre-heated by other appliances such as fryers, grills
or griddles.
Allow a minimum of 2 inches (50mm) clearance above the oven for
hot air to escape.
Allow sufficient clearance, 12 inches (305mm) in front of the oven for
the door to open fully.
Do not affix labels/stickers to oven other than those applied or
approved by the manufacturer.
6
Page 7
SUITABLE COOKING UTENSILS
Manufacturer’s instructions should be checked to determine the suitability of individual
containers or utensils using each of the cooking functions.
Do NOT place metal trays or containers on the BOTTOM of the oven as arcing may occur.
The following chart provides general guidelines:
combination
convection only
Heat resistant containers
Toughened glass
Vitreous ceramics
Earthenware
(porcelain, crockery, china etc.)
Metallic & Foil Trays
Metallic trays
DO NOT USE ANY OTHER
METAL OR FOIL CONTAINERS
Plastic containers
Rigid, boilable, plastic
containers
Disposables
DO NOT USE
Combustibles(paper, card, etc)
Microwave-suitable cling film
Do not use items with metallic
decoration.
Metallic trays may only be used
when placed on the vitreous rack in
the oven cavity ( See IMPORTANT
Note )
Dual-ovenable plastic containers
(up to certain temperatures) are now
available.
Check manufacturer’s instructions
before use
DO NOT USE disposable
packaging or metal foil containers
Other utensils
Tie tags
Cutlery
Temperature probes
IMPORTANT
The oven will accomodate ¼ size bun/sheet pans. Metal sheet pans may be used when
placed on the special vitreous enamel rack ONLY.
No kitchen utensil should be left in
food while it is cooking
7
Page 8
MAIN FEATURES
7
6
12
1
11
2
1
8
13
3
Rear view
4
5
910
4
1
AIR OUTLETS
These vents on the rear panels enable air which
has been used to cool internal components to
escape. It will not allow microwave energy to
escape into the environment. They must be kept
free from obstruction.
2
OVEN CAVITY
The cavity is constructed from stainless steel and
vitreous enamelled panels. It must be kept clean
(see CLEANING).
CONVECTION FAN, GREASE FILTER & CATALYTIC
3
CONVERTOR
The convection fan, which is located behind the
catalytic convertor pulls air in through the filter which
removes the majority of the smoke from the air flow.
The air is then heated and returned to the cavity
through the impinger plates to produce an even
heat pattern in the oven. This layout minimises
areas where grease build up can occur.
Great care should be taken when cleaning this area
of the oven - please note the cleaning requirements
pages 12-14.
The metal grease filter grill covering the fan must be
kept clean and free of debris (See CLEANING)
AIR INLET FILTERS ( LEFT & RIGHT )
4
Situated at the left and right hand side of the base at
the front. These are part of the ventilation system
and must be kept free of obstruction and cleaned
on a daily basis.
DOOR HANDLE
5
This is a rigid bar which is pulled downwards and
towards you to open.
CONTROL PANEL
6
See page 10.
ON/OFF SWITCH
7
When switched ON, the control panel will illuminate.
The fan and ventilation system will also operate.
RATING PLATE
8
Found on the rear panel, this states the serial
number, model type & electrical specifications.
DOOR
9
This is a precision-made energy barrier with three
microwave safety interlocks. It must be kept clean
(see CLEANING section). The door should NOT be
used to support heavy dishes.
DOOR SEALS
10
These ensure a tight seal around the door. They
should be kept clean and checked regularly for
signs of damage. At the first sign of wear they
should be replaced by a Merrychef approved Service
Agent.
STEAM VENT (on rear of oven)
11
This enables steam to escape and prevents build
up of condensation. It will not allow microwave
energy to escape.
MenuKey 2
12
Changes the programs on the oven ( See MenuKey
section for downloading programs on a MenuKey).
Rack
13
Should be removed daily for cleaning
(see CLEANING section).
8
Page 9
CONTROL PANEL
PREHEAT &
COOL DOWN PAD
PROGRAM PAD
PROGRAM NUMBER PADS
These pads are used for setting the cooking time in 1
second steps to a maximum of 10 minutes.
They are also used for storing and recalling programs
from 0-499
MenuKey
The MenuKey System automatically changes all the
cooking programs with an electronic key and allows
program names to be identified
PREHEAT & COOL DOWN
The preheat pad switches the oven into and out of PreHeat Mode. To enter cool down mode press and hold
the Pad for 5 seconds.
PROGRAM
Activates program mode for storing and running pre-set
programs from memory. Programs can also be
downloaded from a MenuKey
(see MenuKey: CHANGING OVEN MENU PROGRAMS)
DISPLAY PANELMenuKeY
FUNCTION PADPROGRAM NUMBER PADS
CANCEL PAD
Cancels all timed cooking cycles, pre-programmed
operations and stops the microwave energy. It does not
alter the oven temperature. If the oven is hot, food will
continue to cook and should be removed from the oven
immediately. This pad will also cancel any incorrect
operations. It will not erase programs.
MAIN DISPLAY PANEL
Shows the principal functions of the oven.
When cooking, the time remaining counts down.
Also displays error messages and oven temperature.
When storing and recalling a program the display
indicates the program number and details.
START PAD
SOCKET
CANCEL PAD
Start up sequence and oven specification
When the oven is switched on the WAWA logo is displayed followed by
information about the oven:
Model No.
Software
MenuKey serial No.
The oven then displays the cold standby screen.
9
MODEL NUMBER:402S
SOFTWARE:
MENUKEY2 CODE:000
MENUKEY CS:0000
Page 10
RUNNING A PROGRAM
Using number pad keys to run a program
Programs 0 to 499 can be recalled using the number pad keys.
The following procedure should be used to activate these programs.
( Programs are installed from a MenuKey see page 11)
Switch the oven ON
1
The display briefly shows the model
no., software issue and MenuKey No.
before showing the OVEN COLD
standby screen.
To heat the oven up to its pre-set cooking temperature
2
press the PREHEAT/COOLDOWN Pad.
The oven will take approximately 20 minutes to reach
the preset temperature, the display will show the
current oven cavity temperature during warm up.
The display will then show READY AT TEMP°F
when cooking temperature is reached.
Press the program number pad(s) you wish to activate
3
(0-499).
The program number and the program name will appear
on the display.
example:
preset temperature 525
OVEN COLD
Press Preheat
READY AT 525°F
RUN PROGRAM - - -
°F
READY AT 525°F
RUN PROGRAM - - -
PROGRAM NAME
example: Program 8
Taking all the necessary precautions to
4
ensure you do not burn yourself, place the
food into the hot oven cavity and close the
door.
Press START Pad to begin cooking
Always keep the period that the door is open
to a minimum.
The program will now operate with the
total remaining time displayed counting
down on the display (all stage time added
together).
When the time reaches “00:00” the
display shows cooking completed and an
audible signal will be given.
Taking all the necessary precautions to
ensure you do not burn yourself remove the
food from the oven and close the door.
example: 2minutes 35seconds
Hot surface
hazard
PROGRAM 008
02.35
PROGRAM NAME
COOKING
COMPLETED
Programs can be halted and cancelled at
any time by pressing the CANCEL key.
Warning: the oven will remain at the pre-set
cooking temperature and food inside the
oven will
10
Page 11
MenuKey : CHANGING OVEN MENU PROGRAMS
The MenuKey System automatically changes all the cooking programs on
the oven from a pre-programmed electronic key.
To change the menus on the oven:
1
Ensure the power switch is OFF.
Lift the MenuKey cover in the top
2
front panel of the oven and put
the key in the slot.
With the key still in place switch
3
the power switch ON.
The oven will now go through the
program download sequence by
displaying the following:
The MenuKey Code. e.g. 555
The MenuKey CS e.g. 0A06
MenuKey CS (checksum)
confirms the menus on this key
are valid for the MenuKey Code.
Confirm that the MenuKey Code
4
and MenuKey CS are correct and
press Download Function key to
load the programs into the Oven
memory.
Do not remove the key
during download sequence
as this could corrupt
the data on the key
MENUKEY2 DETECTED
MK CODE555
MK CS0A06
DownloadUpload
Download
MENUKEY2 DETECTED
MK CODE555
MK CS0A06
DownloadUpload
Note: Downloading from a
MenuKey will clear all the
existing programs
Check that the key is correct
then press the Continue function
key to proceed with the Download
On completion of the download
press the Exit function key to
return the oven to standby mode.
The display briefly will show the
following:
Oven Model No. Software
& MenuKey serial No.
The standby screen will then
display
Continue
Exit
MENUKEY2
DOWNLOADING
MODEL NUMBER:402S
SOFTWARE:
MENUKEY2 CODE:000
MENUKEY CS:0000
WARNING
ALL OVEN PROGRAMS
WILL BE OVERWRITTEN
ExitContinue
MENUKEY2
VERYIFYING
MENUKEY2 DOWNLOAD
COMPLETE
CHECKSUM:0A06
Exit
OVEN COLD
PRESS PREHEAT
Remove the MenuKey and keep
in a safe place.
11
Page 12
CLEANING: 1
For the oven to operate at peak efficiency, the cavity, door and air filters and grease filter
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 efficiency of your oven.
Follow the SAFETY INSTRUCTIONS at the beginning of this manual.
WARNING: DO NOT use caustic cleaners on any part of the oven or oven
cavity as it will cause permanent damage to the Catalytic Convertors
• ALWAYS switch off at the electrical supply before
cleaning
• Complete COOL DOWN procedure and allow the
oven and accessories to cool before commencing
cleaning
• As required wipe out spillages with disposable
Hot surface
Hazard
paper wipes
• NEVER use steel wool, knives or harsh abrasives
on any part of the oven
As with all electrical appliances, it is wise to have the
Faults arising from neglect or misuse
including use without clean filters in
place are not covered by the
guarantee. Service visits as a result
of such faults will be chargeable.
electrical connections inspected periodically.
DO NOT use the oven without clean air filters and cavity grease filter in place
START UP: OVEN COATING PROCEDURE ( clean oven )
1.
Spray Merrychef Oven
Protector onto the sponge
2.
Spread Oven Protector
lightly onto all internal
surfaces of the oven
3.
Spread Oven Protector
lightly onto the internal
surface of the oven door
4.
Switch on the oven and
press PREHEAT. When
the oven has reached
operating temperature it
will take about 30mins to
cure the Oven Protector.
Note: oven protector turns light brown when cured
12
Page 13
CLEANING: 2
COOL DOWN PROCEDURE: ( 30 minutes approx. )
Equipment :– Cooling tray filled with Ice.
1.
With the Oven hot, press
and hold the
PREHEAT/COOL DOWN
pad on the control panel
for 5 seconds to disable
heating and start the cool
down cycle.
2.
Taking all necessary
precautions place a
suitable heaped
container of ice, into the
cavity.
COOL DOWN MODE
PLACE ICE IN CAVITY
Continue
Hot surface
Hazard
3.
Close the door and Press
Continue function key.
Continue
4.
The oven now cools the
oven cavity. This process
will take approximately
30 minutes.
COOL DOWN MODE
OVEN HOT
PLEASE WAIT
alternating warning
( spanish )
COOL DOWN MODE
HORNO CALIENTE
PLEASE WAIT
5.
Wait until the message
below is displayed.
COOL DOWN COMPLETE
READY FOR CLEANING
6.
Switch the oven OFF.
The oven is now ready for
cleaning.
See: CLEANING
INSTRUCTIONS.
13
Page 14
CLEANING: 3
• ALWAYS switch off at the electrical supply and allow oven to cool before cleaning
See COOL DOWN PROCEDURE
• CAUTION: Allow the oven and accessories to cool before commencing cleaning
WARNING: DO NOT use caustic cleaners on any part of the oven or oven
cavity as it will cause permanent damage to the Catalytic Convertors
abrasive nylon scrub pad, cleaning towel and cloths, eye protection and dust mask (optional)
COLD OVEN: CLEANING INSTRUCTIONS ( following cool down )
CAUTION: Wear protective rubber gloves when cleaning the oven
Oven Parts and filters
& Oven Cavity
Remove air filters
both sides
If the door seals are damaged, the oven
must be repaired by an approved Servicer.
DO NOT spray directly into the fan opening at the rear of the oven
1.
Wear protective rubber
gloves and protective
glasses carefully spray
Merrychef Oven Cleaner
onto the internal surfaces
of the oven except door
seals.
DO NOT spray directly
into the fan opening at
the rear of the oven
Wash all parts in warm soapy water. Wash off using a clean cloth and plenty of
clean, warm water. Dry using a fresh, clean cloth.
Remove the rack and lift
out bottom impinger plate
2.
For difficult areas leave
to soak for 10 minutes.
Leave the oven door open
during cleaning.
Use a non–abrasive
nylon scrub pad/sponge
to clean all internal
surfaces and the inside
of the door.
Remove top impinger
3.
Wash off using a clean
cloth and plenty of clean
warm water to rinse top,
sides and back of oven.
Dry using a fresh clean
cloth or paper towel.
Wipe the outside of the
oven with a damp cloth.
plate
Undo fasteners
Remove grease filter
undo the 4 thumb
screws
4.
Replace clean oven
parts
Grease Filter*
Top plate*
Bottom plate*
Air filters x2
DO NOT
USE TOOLS
DO NOT use the oven without clean
air filters and cavity grease filter in place
14
*When replacing impinger plates and the cavity grease
filter use firm finger pressure to tighten fasteners
DO NOT USE TOOLS
Page 15
TROUBLESHOOTING
Oven display
message
No display
Oven not ready
Cavity sensor
Mag OH
Ambient temperature
Invalid time
Invalid temperature
Possible causes
Oven not switched on
no electrical supply to oven
Oven is warming up
Cavity sensor not working
correctly
Magnetron overheating
blocked air filter
failed magnetron
Oven overheating
Cooking time is more than
10 minutes
PREHEAT temperature and
program temperature
do not match
Solutions
Switch oven on
check power supply
call service engineer
Wait until oven reaches ready
state
Call service engineer
clean air filters at base of oven
call service engineer
clean air filters at base of oven
call service engineer
Enter a stage time 10.00 minutes
or less
Check PREHEAT temperature
in configuration set-up
MenuKey error
Display reads ‘READY’
program will not start
Cooking Issues
Core temperatures not achieved
MenuKey is invalid
Door not closed properly
Wrong program used
settings wrong
Try downloading again
Request new MenuKey
Close door
Identify correct program
check settings
15
Page 16
TECHNICAL SPECIFICATIONS
Height
Merrychef EC402S
External Dimensions
( inches )
Power supply ( See Product Rating Label )
Service RequiredModel No.
402S208_
208V ac 60Hz 30A
2P & G
402S240_
240V ac 60Hz 30A
Width
( inches )
( inches )
23.023.027.5
Depth
Wt.
Power output
( lb.s)
187
Microwave
Convection
Power output
( watts )
( watts )
15003250
Approved Service Agent
Merrychef and Menukey are registered trademarks of Merrychef Ltd.
16
Pt No. 32Z3521 Issue 01
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