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Merrychef
®
®
GB
32Z3765GB
402s V4 Service Handbook
Issue 1
1
CONTENTS
Safety instructions
1.0 Operating Instructions
How it works
1.1 Quick Start Guide
1.2 Cleaning Instructions
1.3 Installation & commissioning
Electrical Installation
Parts Explosion
2.1 Firmware/Software & MenuKey
3.0 Troubleshooting
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superseded and is subject to change without notice.
Merrychef
Station Road West
Ash Vale
Aldershot
Hampshire GU12 5XA
Phone:+44 (0) 1252 371000
Fax: +44 (0) 1252 371007
e-mail: info@merrychef.com
This equipment complies with the following EEC directives:
EMC 89/336 EEC
LVD 73/23 EEC
www.merrychef.com
Merrychef reserves the right to alter specifications without prior
notice.
Merrychef and Menukey are registered trademarks of Merrychef Ltd.
2
IMPORTANT SAFETY INSTRUCTIONS
PLEASE READ THE FOLLOWING SAFETY INSTRUCTIONS CAREFULLY
This manual is designed to assist engineers who have been on
a recognised product familiarisation and training course run by
Merrychef. It has been prepared to offer technical guidance for the
402s range of Ovens.
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, and to protect the appliance from possible
damage, please follow this Safety Code when servicing these ovens.
Before attempting to repair the oven, check it for microwave emission
using a calibrated emission detector.
Check that the oven is not emitting microwaves, even when
supposedly not in operation.
Check that the oven is not operating continuously, whether the
display indicates cooking or not.
Always discharge the HT capacitors before working on the oven
using a suitably insulated 10 MW Resistor.
When testing the oven with covers off run for short periods of time
only or magnetrons will overheat and the display will show Error
condition.
Before removing any covers from the oven, do all of the following.
Switch off the mains supply and remove the plug from the wall
socket.
or
If the oven is hard wired, ensure that the power is turned off at the
isolator switch.
Note:
The On/Off switch on the oven is not adequate protection against
electric shock, as it does not isolate all of the internal wiring from the
mains.
Upon completion of a service the oven, or before reconnecting the
appliance to the electrical supply for testing, check all of the following
points:
•
•
•
•
•
•
•
All internal electrical connections are correct (see wiring
diagram).
All wiring insulation is correct and is not touching a sharp
edge.
All grounding connections are electrically and
mechanically secure.
All door safety interlocks are secure and mechanically
sound.
The door operation is smooth, and the arms run freely in
the slots.
The door activates all four of the door interlock switches
and in the correct order
The temperature sensor is correctly connected to the
Power PCB.
Before finishing a service call, recheck the following points:
•
•
•
•
All of the electronics are functioning correctly and all of the
touch pads are working.
Microwave emissions are below permissible limit of 5 mW/
cm².
The power output of the oven is checked in accordance
with the procedure page.
Oven has correct 50mm (2 inches) air gap all round and
50mm (2 inches) above.
Air flow should not be restricted.
3
Standard Features
Accelerated Cooking Technology®
combines three heat technologies:
• Convection
• Microwave
• Impingement
• Ventless operation
• Up to15x faster than a
conventional oven
• Stainless Steel construction
• Easy to use Digital Control Panel
• MenuKey ®­technology allows users to upload & download
cooking menu items in up to 256 Programs
• In-built diagnostics
• Easy to clean interior
• Cool to touch door­­
Options &
Accessories
• Griddle Pan
• Rack
• Cool Down Pan
• Vitreous Enamel Oven Tray
• Handle
• Grill Pan Set
(includes 4 Pans, 2 Handles & 2 Carriers )
• Bread Basket
• Pizza Paddle
• Oven Cleaner
• Oven Protector
Remote monitoring available
Specifications
Upper catalytic
converter
Introducing the latest innovation in ventless accelerated cooking
from Merrychef.
Heater elements
How it works:
The convection fan pulls air in through the grease filter [1] which
removes the majority of particulates from the air flow. The air is
then heated and returned to the cavity through the catalysts [2]
and impinger plates [3] to produce an even heat pattern in the
oven. This heat layout minimises the areas where grease can build
up, allowing food to cook evenly to produce a crisp golden finish.
3
Impinger
plates
• The unit includes in-built catalytic converters eliminating the
need for a ventilation hood.
2
Convection
fan
2
Heater
elements
1
3
• A standard metal baking tray can be used.
• Oven controls allow multi-stage programming. Each programme
Grease
filter
offers up to six stages each with its own time, fan speed and
microwave power settings.
• The Merrychef MenuKey allows the user to upload and download
new programmes. A change of menu could be implemented
simultaneously in remote sites using this feature.
Lower catalytic
converter
4
MAIN FEATURES
7
6
12
1
11
8
1
2
13
3
Rear view
4
10
9
5
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).
3 CONVECTION FAN, GREASE FILTER & CATALYTIC
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 on see CLEANING.
The metal grease filter grill covering the fan must be kept
clean and free of debris (See CLEANING)
4 AIR INLET FILTERS ( LEFT & RIGHT )
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.
5 DOOR HANDLE
This is a rigid bar which is pulled downwards and towards you
to open.
4
6 CONTROL PANEL
7 ON/OFF SWITCH
When switched ON, the control panel will illuminate. The fan
and ventilation system will also operate.
8 RATING PLATE
Found on the rear panel, this states the serial number, model
type & electrical specifications.
9 DOOR
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.
10 DOOR SEALS
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.
11 STEAM VENT (on rear of oven)
This enables steam to escape and prevents build up of
condensation. It will not allow microwave energy to escape.
12 MenuKey 2
Changes the programs on the oven ( See MenuKey section
for downloading programs on a MenuKey).
13 RACK
Should be removed daily for cleaning
(see CLEANING section).
5
Low Voltage Transformer
Control Panel
Magnetron Fuse
Logic PCB
Fuses
& Power supply/Mains filters
Relay Board
Control Box
Hot Box & Catalytic Converters
Upper Heater Elements [x3]
Magnetron Fuse
Temperature Sensor
Magnetron LH
Microswitch Assembly
Convection Hot Air Motor
Stirrer Motor
Cavity Overheat Sensor
Magnetron RH
Lower Heater Elements [x2]
Hot Air
Motor Controller
Rear
Panel
Cooling Fan
HV Capacitor
HV Transformer
HV Transformer
HV Capacitor
Oven software
The 402s Oven uses 2 types of software CodeKey
and MenuKey, supplied on similar solid state ‘keys’.
CodeKey installs the oven firmware version, referred to
as Software on the control panel OVEN INFORMATION
screen at start up. The MenuKey is loaded with pre-set
oven Cooking programs organised in Category groups.
Using a MenuKey a complete set of cooking programs
can be loaded into the Oven’s memory in one simple
operation.
CodeKey:
CodeKey installs the oven firmware version which
enables and disables various features.
KFC and all QSR ovens have Firmware version 4.0
which disables Manual operation and set up functions.
To perform engineering functions download Firmware/
Software version 4.3 to enable Manual controls.
6
Quick Start Guide
CONTROL PANEL
COOL DOWN
PROGRAM PADS
BREAKFAST
DISPLAY
FUNCTION PAD
CATEGORIES
CANCEL
USING A COOKING PROGRAM e.g. BREAKFAST/BACON
1
Switch the oven ON
2
Select the Category e.g BREAKFAST
Taking all the necessary precautions to
ensure you do not burn yourself, place
the food onto the rack in the hot oven and
close the door.
Hot surface
Hazard
3
TO BEGIN COOKING
Select the program name
e.g. BACON
The oven heats up to its PREHEAT temperature
this will take approximately
20 minutes.
The oven is ready to use when the CATEGORIES
screen is in the display.
Standby
If the oven is not used for 3 minutes
the oven goes into standby mode.
Press CANCEL to return to the
Categories screen.
>>
PRESS
CLEANING: COOL DOWN : (approx. 30 minutes)
With the oven hot press
the Cool Down pad to
switch off the heaters.
Taking all necessary
Close the door and Press the
precautions place a suitable function key START to begin the
heaped container of ice, into Cool Down cycle.
the cavity.
COOL DOWN MODE
PLACE LOAD IN CAVITY
AND PRESS START
Start
Hot surface
Hazard
COOL DOWN MODE
OVEN HOT
PLEASE WAIT
>>
Switch the oven OFF.
The oven is now ready for cleaning refer to the CLEANING procedure.
30 minutes
Note: Ovens on a filter base have one
large filter only
7
CLEANING:
• ALWAYS switch off at the electrical supply and allow oven to cool before cleaning
• Complete COOL DOWN procedure and 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
Equipment: Merrychef oven cleaner, heat proof gloves, protective rubber gloves, non–abrasive nylon scrub pad,
cleaning towel and cloths, eye protection and dust mask (optional)
COLD OVEN: CLEANING INSTRUCTIONS (After cool down)
CAUTION: Wear protective rubber gloves when cleaning the oven
Oven Parts and filters
& Oven Cavity
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 air filter at the
base of the oven
Remove the rack and lift
out bottom impinger plate
Remove top impinger plate
Undo fasteners
To remove grease filter
pull handle and lift out
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
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.
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.
4.
Replace clean oven
parts
Grease Filter
Top plate*
Bottom plate
Air filters x2
DO NOT
USE TOOLS
*When replacing impinger plates and the cavity grease
filter use firm finger pressure to tighten fasteners.
DO NOT USE TOOLS
DO NOT use the oven without a clean air
filter and cavity grease filter in place
8
Install Guide
BUILT IN INSTALLATION GUIDE
The Merrychef 402s is primarily designed for
counter top installation and is not recommended
for built-in enclosures. Should it be necessary
to enclose the oven then please observe the
following clearance and ventilation requirements.
The clearances specified in the diagram are
minimum, increased clearances will aid reliability
and improve the life of the product.
Please give consideration to access for
service in the future, including access to
electrical supply service plug/ isolation
switch. The operator will be charged an
additional fee to cover the cost of gaining
safe access to the oven.
Ventilation Fan
500m³/hour
Not supplied.
Note:
That the additional fan within the enclosure
should be rated at 500m³/hour.
Unobstructed
air flow
into these
areas
Note that the additional fan within
the enclosure should be rated at
500m³/hour
COUNTER TOP CLEARANCE OF MAJOR HEAT SOURCES
The Merrychef 402s draws in a significant airflow
for cooling purposes. It is essential that the oven is
not located near or is isolated away from any major
heat sources using distances and thermal barriers
as shown in the diagram.
Minimum
For grills and hotplates allow at least 150mm
clearance either side of the oven.
For a fat fryer allow 300mm inches clearance.
Thermal
Barrier
Runs the whole
depth of the oven.
Please give consideration to access for
service in the future, including access to
electrical supply service plug/ isolation
switch. The operator will be charged an
additional fee to cover the cost of gaining
safe access to the oven.
Grill/
Hotplate
9
Minimum
Thermal
Barrier
Runs the
whole depth
of the oven.
Fryer
Filter Base:
If the filter is not correctly installed the Magnetic reed
switch will trip the contactor and the main power supply
to the oven will be disconnected.
Plug
Contactor
Socket
Magnetic/Reed
Switch in
Filter Housing
10
Recommended Electrical Installation Guide
WARNING
This appliance must be earthed. Failure to do
so may result in electric shock and death.
EQUIPOTENTIAL
An Equipotential Earth point is provided on the rear
panel of the oven for independent Earth (GND)
connection
WARNING: HIGH LEAKAGE CURRENT Earth
connection is essential
The Oven must be connected to a separate electrical supply and
installed by a qualified and approved electrician. A suitably rated
isolating switch with a 3mm contact gap on all poles should be
fitted for each oven installed.
Phase Loading Diagram
Other
Equipment
Twin Phase
Oven loading
Electrical Supply
Single Phase
Oven loading
L1
L1
L1
230V
Brown
32 Amps
16 Amps
N
N
400V
N
N
230V
230V
Blue
L3
L3
Brown
N
Blue
16 Amps
L2
L2
Black
Yellow/Green
Earth
Phase Loading
Oven loading per phase is not equal therefore we recommend that other electrical
equipment is connected to L3+ N.
Circuit Breakers
RED
BLUE
L1
N
TWIN PHASE
Circuit Breakers should be rated at 20A per Phase
and be Time Delay, Motor Start Type (European Type C).
L3
[L3 Not used]
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
11
N
L2
viewed from
back of plug
viewed from
back of plug
Plug Type:
Three Phase
32Amp
IEC 60309
[ EN60309]
L1+ L2+ N+ E
Plug Type:
Single Phase
32Amp
IEC 60309
[ EN60309]
L1+N+E
20Amp
40Amp
[L3 is not used]
If you are in any doubt about your electrical supply,
seek the advice of a qualified electrician
L1
Troubleshooting Guide
OVEN NOT FUNCTIONING:
COOKING ISSUES:
1. Is the oven plugged in and the
If food products are not cooking correctly then
please use the following questions to try to
pinpoint the problem.
Merrychef service technicians can only change
oven settings by the use of the correct Menukey.
Please note that not all questions may be
applicable to the issue you are experiencing:
ON/OFF switch in the ON position?
2. Is the display blank?
If YES is the electrical supply definitely turned on?
Have you tried the plug in another socket (if available)?
3. Are there any Error Codes or Messages on the screen?
4. Is the oven preheating to the Correct Temperature
1. Was this problem present at the time you
received your Merrychef oven?
(250°C), when the oven is turned on? The display
2. Did the problem correspond with a new
will show the CATEGORIES screen when the correct
shipment of product(s)?
temperature is reached.
(Note: This can take up to 30 minutes.)
product changed since the menu has been
5. When you start to cook a product does the oven display
Error Codes or Warning Messages?
(Normally the display will show a timer counting down to
zero)
developed).
3. Is this an intermittent problem or always
present?
4. Does the problem happen regardless of the
6. When the cooking cycle is complete
type of food you are cooking?
does the warning bell sound?
(as opposed to happening only when a
specific type of food is cooked)?
Display Panel messages:
Message
(For example, perhaps the size of the
Condition
ERROR MAGNETRON 1
Magnetron 1 has overheated
ERROR MAGNETRON 2
Magnetron 2 has overheated
ERROR MAGNETRON
1& 2
Magnetron 1 and 2 have
overheated
MAGNETRON 1 FAILED
Magnetron 1 has Failed
MAGNETRON 2 FAILED
Magnetron 2 has Failed
MAGNETRON 1 & 2
FAILED
Magnetron 1 & 2 has Failed
CAVITY SENSOR ERROR
Cavity temperature exceeds
more than 50°C above
PREHEAT temperature setting
during heat cycle
6. Are you using the correct programme?
Possible cause
Blocked Air filter(s)
Oven located
near hot air sources
Oven being used empty
Call Service Engineer
Component failure
Call Service Engineer
(Review the Operations Guide if you are
unsure).
7. Are all employees following correct cooking
procedures?
8. Are there any alarm codes or warning
messages on the screen?
Indicates combustion
( fire ) in oven cavity
9. Is the food item being cooked at the correct
starting temperature?
10.Is the food item being removed from the oven
immediately when the cooking is complete?
12
Standard Tests
Before carrying out diagnostics on the oven.
1. Check the Power Supply and confirm the Voltage is within +/- 10%
of the nominal supply rating.
2. Check that the Oven is installed properly
3. The Filter is installed correctly postioned in the Filter Base (
Incorrect fitting will cut the power to the oven
4. The oven is plugged in to the correct type of power supply.
5. Error messages in the display
Service diagnosis measurement is recommended as follows:
Please notice what is happening when the oven is switched on:
Using the Circuit Flow diagram on page 14 as a
Guide.
Check the input power supply at the Terminal Block is typically
between 220-230 Volt (L1 and L2 versus neutral)
If Fuse 4 blows check that the Door operated Micro-switches at each
side of the oven are adjusted correctly
The Low Voltage should be present at the logic board and the relay
board which control the operation of the oven.
LED’s will come on if Low Voltage is present on the Logic board and
the Relay board.
The on/off switch also initiates the Microwave Stirrer Motors left and
right to run.
The on/off switch initiates the Cooling Fan to run
The on/off switch initiates the Convection Hot Air Motor to run (Only if
the Low Voltage is present)
The display lights up with informational text.
If some of the above does not occur use the Circuit Flow diagram for
ease of fault finding. (page …)
If this all works the oven can be tested on the 3 Oven heating/cooking
aspects.
1. Hot air motor,
2. The heating elements
3. Microwave
ensure the following:
During PREHEAT start up (from cold) the Heating elements current
draw can be measured on wire 40 at Fuse 2 (20 Amp) typically 14.5
– 15.1 Amp
There are 5 elements of each 650 W, So a failing element can drop
the current with approx. 2.8 Amp per element
Circuit Flow Diagram (Page 15) provides you with the current
diagram and easy fault finding information.
The Hot Air Motor Controller can be checked by listening to the
decrease in hot air motor speed if you open the door. The Hot air
motor runs at 50% of the speed when the door is closed and on 20%
if the door is opened. By measuring the DC voltage on connector JP
15 Logic Board wires Blue and Yellow you can double check. 20% is
typically 1.9 – 2.1 VDC and 50% is typically 4.9 – 5.1 VDC
The Hot Air Motor Controller can be checked by listening to the
decrease in hot air motor speed if you open the door. The Hot air
motor runs at 50% of the speed when the door is closed and on 20%
if the door is opened. By measuring the DC voltage on connector JP
15 Logic Board wires Blue and Yellow you can double check. 20% is
typically 1.9 – 2.1 VDC and 50% is typically 4.9 – 5.1 VDC
To measure the Magnetron current draw you will need to set the
oven to Manual Mode (set the pre-heat to zero) and operate the
magnetrons (WARNING do not forget to put a load in the cavity, not
with an empty oven) You may notice the LED’s on the Logic PCB for
the Magnetron detect from the Fibre optics, also notice the LED’s
D15 and D20 on the Relay Board while measuring the current on wire
44 at Fuse 8 and wire 46 at Fuse 7.
Typical current draw is between 5.6 – 6.5 Amps (Using Circuit Flow
Diagram on page 16 will help to follow the circuit)
Do not forget to carry out a component measurement test in case you
find errors in the magnetron environment. (WARNING Disconnect
from the power supply and discharge the capacitor before touching
any component)
Download the menu back from your MenuKey to the oven or set the
PREHEAT temperature back to the original setting as it should be
and save the settings.
Carry out an emission measurement test.
The Hot Air Motor Controller can be checked by listening to the
decrease in hot air motor speed if you open the door. The Hot air
motor runs at 50% of the speed when the door is closed and on 20%
if the door is opened. By measuring the DC voltage on connector JP
15 Logic Board wires Blue and Yellow you can double check. 20% is
typically 1.9 – 2.1 VDC and 50% is typically 4.9 – 5.1 VDC
13
Circuit Flow Diagram: Motors, Fans and Low Voltage Circuit
Terminal
Block
36
37
Terminal
Block
Fuse 6 [10A]
41
Mains
Filter MF3
Mains
Filter Mf3
56
51
31
Power
Switch
30
Power
Switch
Fuse 1
1.6 Amp
Relay PCB
25
24
21
Stirrer
Motor
LHS
M
Stirrer
Motor
RHS
20
23
22
27
Cooling
Fan
Hot Air
Motor
26
29
Low Voltage
Power to
Logic PCB
Cavity
Overheat
Sensor
[Reset
Possible]
M
47
Fuse 9
1 Amp
Blue
M
Brown
48
Black
Cooling
Fan
Logic
PCB
Blue 0V
Yellow
Red 10V
Low Voltage
Transformer
Hot Air Motor
Controller
M
14
28
Jp1
Circuit Flow Diagram: Cavity Heaters
Live Phase
Power In
Terminal
Block
Power
Switch
38
Fuse 2 [20A]
40
31
Mains
Filter MF1
29
58
SSR
JP17
Logic PCB
Fuse 9 [1A]
Blue/Red
06
Relay
switch
Low Voltage
Transformer
Relay PCB
05
5x Heating
Element
3250W
49
32
Mains
Filter MF1
Terminal
Block
Overheat
Sensor
Power
Return
Connections
Live Phase
15
Circuit Flow Diagram: Magnetrons and HV Circuit
Live Phase
Power In
Neutral
Live 2
Terminal
Block
Terminal
Block
35
33
Fuse 4
[20A]
Mains
Filter MF2
42
Mains
Filter MF2
50
SW1
SW2
OPEN
[RHS]
CLOSED
[LHS]
18
17
SW3
CLOSED
19
13
Gold Resistor
220Ω
10
9
7
Relay PCB
14
15
11
12
Fuse 7
[10Amp]
Fuse 8
[10Amp]
46
44
Mains
Filter MF4
Mains
Filter MF5
Magnetron LHS
Magnetron RHS
T1
Filament
voltage
T2
62
60
53
FO1
Filament
voltage
54
52
61
16
Phase
Light
55
63
FO2
Fibre optic1
Logic PCB
Fibre optic2
Logic PCB
Mains
Filter MF4
Mains
Filter MF5
16
L3
L2
L1
35
37
38
36
32
33
34
BLACK
N
35
37
38
36
32
33
34
Issue 17
REMOVE WIRE 37 FOR
TWIN PHASE WIRING
L2
L1
BROWN
BLUE
MAINS IN
EUROPE/REST OF WORLD
WHITE
BLACK
36
34
F6
3
F2
40
1
2
4
58
49
INTERCONNECTOR
44
01 02 03
JP5
JP1
JP2
JP3
34
F4
42
1
3
2
5
05
04
4
05
04
6
06
06
HEATERS
1
7
07
07
2
4
50
51
56
58
08
220 OHMS
09
10
MICROWAVE
SSR
1
2
6
12 13
12 13
14
14
31
20
22
24
26
28
30
15 16
15 16
31
30
11 12 13 14 15 16
11
11
SW4
30
MAINS ON/OFF
SWITCH SHOWN IN
OFF STATE
RELAY BOARD
MF3 – MAINS FILTER CONTROL
MF3
35
16
58
49
MF2 – MAINS FILTER MICROWAVE
MF2
33
3
4
38
MAG RHS SENSOR
T3
32
MF1 – MAINS FILTER HEATER
MF1
MAG LHS SENSOR
CAVITY SENSOR
36
35
33
38
32
HR
NORTH AMERICA
49
5
5
57
4
4
21
19
18
17
18
17
23
25
27
29
31
21
20
22
24
26
28
19
23
25
27
29
31
30
19
18
17
28
29
26
27
24
25
22
23
20
21
30
31
E / RoW OVEN FIT WIRE 57.
CABLE TIE WIRE 4 TO LOOM
Europe/
RoW
Heater
North
America
Heater
5
5
MAINS IN
TWIN
PHASE
49
12
1
JP18
F8
JP17
20A
20A
10A
10A
10A
1A
14
1
SK1
52
53
54
55
63
FO2
61
300C / 572F
INTERCONNECTOR
FO1 LHS
FO2 RHS
MENUKEY
PCB
CONTROLS
Fibre Optic Links
10
T1
60
PHASE CHECK
T2
62
CAVITY OH STAT
JP20
DET1
HEATERS CIRCUIT
MICROWAVE / INTERLOCKS
CONTROL CIRCUIT
TRANSFORMER 2
TRANSFORMER 1
AUX TRANSFORMER 3
HEATER ELEMENTS
650 WATT PER ELEMENT
2
4
2
4
JP19
DET2
NOTES
MEMBRANE
PANEL
20
JP13/14
Daughter
PCB
11K0013
Logic PCB
11K0012
4
DISPLAY
45
MF4
3
LHS NOTE 0V TAPPING
FUSE VALUE FUNCTION
F2
F4
F6
F7
F8
F9
46
3
F7
RHS NOTE 0V TAPPING
JP15
NOTE: DOOR
SWITCH SHOWN IN
DOOR CLOSED
POSITION
HR
MSC
11
15
MF5
ILLUMINATES IF CORRECTLY
WIRED OUT OF PHASE.
SW5
DOOR
INDICATOR
12
14
11
15
MICROWAVE
FO1
26
27
22
23
26
27
29
29
18 17 19
18 17 19
47
F9
BLUE
BROWN
V W
U
CONVECTION
MOTOR
48
BLUE
21
M
20
20
25
25
M
24
24
MSC
COOLING
FAN
BLUE 0V
YELLOW 0-10V+
RED 10V+
BLACK
2uF
BROWN
10
9
8
07
T3
T3
NOTE: USE 208V TAPPING FOR
208V OVEN. ALL OTHER
VOLTAGES USE 230V TAPPING
28
TERMINAL BLOCK
MOTORS
CAVITY
OH STAT
to
28
STIRRER MOTOR LHS
21
07
NOTE: SWITCHES
SHOWN IN DOOR
CLOSED POSITION
LHS SW3
SECONDARY
INTERLOCKS
CAVITY STAT AND LOW
VOLTAGE TRANSFORMER
RHS SW2
PRIMARY
MOTOR SPEED
CONTROLLER 36
50
13
13
STIRRER MOTOR RHS
22
23
50
RHS SW1
MONITOR
BLUE
BLACK
HEATERS / MAINS SWITCH
BROWN
MAINS IN
GREY
GREY
17
SWITCH OFF THE HEATERS (Disable PREHEAT)
The oven has a constant operating temperature for
cooking shown as the PREHEAT TEMPERATURE in the
display when the oven is switched on.
When the cold oven is switched on it heats up to the
PREHEAT temperature before cooking with programs
can commence. This temperature is set initially at 275°C.
1. Switch oven OFF
Switch the oven ON and press and hold
the Edit Preheat Temp function key to
display OVEN TEMPERATURE.
( Note: this screen is available for 5
seconds )
+
The Display shows the Start up sequence and oven
specification for 2-3 seconds
followed by the Edit PreHeat Temp screen.
OVEN TEMPERATURE
<< -
+ >>
Save >>
Set to 0C to switch heaters off and Save.
ENABLE MANUAL & PROGRAM MODE
1. Switch oven OFF
Switch the oven ON and press and hold the
Lower Right ( Edit Oven profile is hidden in
the display ) function key to display OVEN
PROFILE.
( Note: this screen is available for 5 seconds )
275°C
+
PROGRAM MODE
OFF Programs are protected and cannot be edited.
ON
Allows Programs to be edited and added,
MenuKey can be created
MANUAL MODE
OFF Manual controls are disabled. Only pre-set
Programs can be used
ON Manual controls operate the oven directly
from the control panel
Press Save to save the settings and exit
18
OPERATING INSTRUCTIONS: MANUAL MODE
WARNING:
DO NOT APPLY MICROWAVE ENERGY WHEN OVEN IS EMPTY
DO NOT USE THE OVEN WITHOUT
CLEAN AIR FILTERS IN POSITION
To familiarize yourself with the controls place a heatproof bowl
containing approximately 1.5 litres of water in the oven.
The oven can be operated in manual
or programmed mode. In order to use
the manual controls MANUAL MODE
should be set to ON in the oven
profile.
Using Manual Mode
1 Switch the oven ON
The oven heats up to its PREHEAT temperature this will
take approximately 20 minutes.
The display will show the current oven cavity temperature.
When PREHEAT cooking temperature is reached the
display will show the CATEGORIES screen. 2 To enter MANUAL MODE press the Lower
Right Hand Function Pad under the display
CAT 001
CAT 002
CAT 003
CAT 004
CATEGORIES
CAT 005
CAT 006
CAT 007
CAT 008
Increase or decrease the fan speed
( in 5% steps) use the -/+ pads
Manual Mode
MANUAL MODE
Time: 00:00
Fan: 050%
Clear Time
PWR:000%
Press and hold the -/+ Pad
will increase/decrease the
time rapidly.
19
Start
CodeKey: Firmware download
1 Ensure the power switch is OFF.
2 Lift the MenuKey cover in the top front panel of the
oven and put the Codekey in the slot.
3 Warning:
During the next step the screen will go blank for
approximately 1 minute during this time.
DO NOT REMOVE THE CODEKEY/DO NOT TURN
THE OVEN OFF as this will permanently damage the
Logic Board.
With the key still in place, switch the power switch ON.
After 1 minute the oven will boot up, press pause to
hold the OVEN INFORMATION screen.
Confirm that the Firmware/Software version is correct.
OVEN INFORMATION
Oven on time:
00001 Hours
Magnetron on Time:
00000
Door Operations:
00000
Software Version:
4.4LD
MenuKey Code:
000
MenuKey Checksum:
4741
Firmware/Software Version
20
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:
WARNING
Downloading from a MenuKey will clear
all the existing programs
Do not remove the key
during download sequence
as this could corrupt
the data on the key
MENUKEY2
Check that the key has the correct
number/code for the programs you want
to load into the oven memory
1 Ensure the power switch is OFF.
2 Lift the MenuKey cover in the top front panel of
the oven and put the key in the slot.
3 With the key still in place switch the power switch ON.
The oven will now go through the program download
sequence by displaying the following:
Copying Programs from
MenuKey to Oven
MenuKey Detected
Please Wait
Verifying Programs
Copied Correctly
MenuKey Copied
Successfully
The display briefly will show the following : Oven Model No., Software & MenuKey serial No.
The Oven will then commence heating up to the PREHEAT temperature ready to cook.
4 Remove the MenuKey and keep in a safe place.
Saving Programs to a MenuKey
In the CATEGORIES screen select EDIT SCREEN ( Pad name hidden) then select CREATE MENUKEY
CAT 001
CAT 002
CAT 003
CAT 004
CATEGORIES
EDIT
CAT 005
CAT 006
CAT 007
CAT 008
EDIT CATEGORY NAME
EDIT A PROGRAM
CREATE MENUKEY
EDIT SCREEN
1 Enter a number for the MenuKey Code to identify
the new MenuKey, use the +/- Function Pads.
MENUKEY PROFILE
MenuKey Code: 000
Program Mode : ON
Temperature Scale : °C
Cooking Range: OFF
For an explanation of the following features see
Setting the Oven Profile Page 11
2
3
4
5
Cooking Range: OFF
Set the Program Mode to ON or OFF,
Set Manual Mode to ON or OFF:
Enter the Lower Band temperature setting 15-75°C
Set the oven Temperature Scale °C
Insert a MenuKey and press START to copy the programs.
The display shows the following:
Copying Programs from
Oven to MenuKey
Verifying Programs
Copied Correctly
START
WARNING
Any programs already
on the key will be deleted
MenuKey Copied
Successfully
The Display returns to the CATEGORIES screen and the Oven will heat up to the PREHEAT temperature ready
to cook.
21
PCB Connections & LED Indicators
Relay PCB:
D15 Magnetron
active
Cavity
Temperature
Sensor
Input
D15 Magnetron active
D16 Magnetron soft start
D16 Magnetron
soft start
D19 Heating elements heating up
D20 ON when Low Voltage power is on, is OFF when microwave is
operated.
D19 Heater ON
Magentron
Overheat sensor
Inputs
D20 LED
ON
when power is on
OFF
when Microwave is
operated.
Connector To
Logic PCB
U1 Ambient air
temperature
sensor
Di splay
Fuse
Fuse
Not Used
AC input from
Aux Transformer
Piezo sounder
output
Logic board:
D6 Is in series with signal to the Motor Speed Controller output.
Bright when fan speed is 100%, dimmed when Fan speed is
10% with the oven door open.
D7 Low voltage power on
D8 Flashes typically 1x per second to indicate that internal memory
is being accessed.
D11ON when door is closed,
OFF when door is opened
D10Illuminates when the main micro processor is accessing the
MenuKey socket.
Spare input
(not used)
Display
Connecter
Temp Calibration
Relay PCB 15 way
Connecter
Door
Switch IP
D11
Door switch
Indicator
ON when door
closed
D8
D10
Remote data
point
D6
MenuKey
Socket
Connector
Program
memory storage.
Chip may be
exchanged
with New PCB if
PCB replaced.
Fibre Optic Magnetron
Detection
Solid State Relay
Heat er regulation
circuit
Motor speed
controller
Membrane panel
connector
Fibre Optic
Detector 2 to RHS
D7
D7 Power LED
Indicates Logic PCB
is powered
See Troubleshooting
Guide
Fibre Optic
Detector 1 to LHS
Magnetron 1
Magnetron 2
22