Mychef iCOOK Operating manual

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TECHNICAL SUPPORT SERVICE MANUAL iCOOK | iBAKE | COOK | BAKE | SNACK | BAKERSHOP - DT.MS.CB.2202.2
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iCOOK | iBAKE | COOK
BAKE | SNACK
BAKERSHOP
Technical Support Service Manual

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TECHNICAL SUPPORT SERVICE MANUAL iCOOK | iBAKE | COOK | BAKE | SNACK | BAKERSHOP - DT.MS.CB.2202.2
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INDEX
1. DISASSEMBLY FOR SERVICE ACCESS..................................................................... 4
1.1. Removing the door............................................................................................................ 4
1.1.1. Side-opening ovens ................................................................................................ 4
1.1.2. Front-opening ovens .............................................................................................. 5
1.2. Removing the top panel.................................................................................................... 6
1.3. Removing the real panel ................................................................................................... 7
1.3.1. COOK, iCOOK, BAKE, iBAKE ................................................................................ 7
1.3.2. BAKERSHOP 6 and 10 600x400 trays ................................................................... 8
1.3.3. BAKERSHOP and SNACK of 3 and 4 trays............................................................ 9
1.4. Removing the side panel .................................................................................................. 9
1.5. Removing the convection fan cover plate..................................................................... 10
1.6. Accessing the siphon....................................................................................................... 12
2. TROUBLESHOOTING ............................................................................................ 14
2.1. Checking electrical elements ......................................................................................... 14
2.2. Checking power supplies ............................................................................................... 14
2.2.1. Three-phase models ............................................................................................. 14
2.2.2. Single-phase models ............................................................................................ 15
2.2.3. Safety thermostat................................................................................................... 15
2.2.4. Safety contactor..................................................................................................... 16
2.2.5. Relay board LED status......................................................................................... 18
2.2.6. Communication cable........................................................................................... 18
2.2.7. Control board ........................................................................................................ 19
2.3. Solutions to common problems..................................................................................... 19
2.3.1. The oven does not turn on ................................................................................... 19
2.3.2. The oven does not start ........................................................................................ 20
2.3.3. The oven does not heat up .................................................................................. 21
2.3.4. The oven turns itself off or the electronics do not respond ............................. 22
2.3.5. The oven burns the food ...................................................................................... 23
2.3.6. The oven does not produce steam ..................................................................... 23
2.3.7. The drain is clogged ............................................................................................. 24
2.4. Automatic error detection .............................................................................................. 26
2.4.1. Mychef COOK/ iCOOK/BAKE/iBAKE/BAKERSHOP/SNACK ........................... 26

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3. SETTINGS MENU .................................................................................................. 29
3.1. Access password.............................................................................................................. 29
3.2. Mychef COOK / BAKE / BAKERSHOP / SNACK ........................................................... 29
3.2.1. Oven configuration ............................................................................................... 30
3.3. Mychef iCOOK / iBAKE ................................................................................................... 36
3.3.1. Oven configuration ............................................................................................... 38
4. FIRMWARE UPDATE............................................................................................. 43
4.1. Firmware ........................................................................................................................... 43
4.2. Wi-Fi module .................................................................................................................... 44
5. REPLACEMENT OF ELEMENTS ............................................................................. 45
5.1. Replacing the chamber light .......................................................................................... 45
5.2. Replacement of the chamber probe ............................................................................. 47
5.3. Replacement of the relay board..................................................................................... 49
5.4. Replacement of contactors ............................................................................................. 51
5.5. Replacement of the control board................................................................................. 51
5.6. Replacement of solenoid valves..................................................................................... 54
5.7. Replacement of the safety thermostat........................................................................... 55
5.8. Replacement of the steam injection pipe ..................................................................... 56
5.9. Replacement of the oven motor turbine....................................................................... 57
5.10. Replacement of the oven motor.................................................................................. 58
5.11. Replacement of the oven motor seal .......................................................................... 60
5.12. Replacement of the resistor ......................................................................................... 61
5.13. Replacement of the suction solenoid.......................................................................... 62
5.14. Replacement of the latch hook.................................................................................... 63
5.15. Replacing the door handle........................................................................................... 64
5.16. Replacing the door sensor ........................................................................................... 64
5.16.1. iCOOK/iBAKE/COOK/BAKE............................................................................ 64
5.16.2. SNACK/BAKERSHOP ........................................................................................ 66
5.17. Replacement of the door magnet ............................................................................... 67
5.18. Replacement of the cooling fan................................................................................... 68
6. GENERAL WIRING DIAGRAM ............................................................................... 69
6.1. Mychef 9 relays board ..................................................................................................... 69
6.2. Mychef 17 relay board..................................................................................................... 70
6.3. Mychef COOK, BAKE, BAKERSHOP, AND SNACK controls....................................... 71
6.4. Mychef iCOOK and iBAKE controls ............................................................................... 71

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TECHNICAL SUPPORT SERVICE MANUAL iCOOK | iBAKE | COOK | BAKE | SNACK | BAKERSHOP - DT.MS.CB.2202.2
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1. DISASSEMBLY FOR SERVICE ACCESS
Warning: Before proceeding to disassemble any component, make sure
that the equipment is disconnected from the power supply.
1.1.Removing the door
Before removing the door, disconnect the communications cable attached to the oven
control. See chapter 5.5.
1.1.1. Side-opening ovens
The following picture shows how to remove the door on side-opening models. Remove the
3 screws in the picture and pull the door upwards.
Removing the door (side-opening models)

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1.1.2. Front-opening ovens
On front-opening ovens, turn the locking tabs on the right and left hinges. Then lift the door
until it is released.
Removing the door (front-opening models)

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1.2. Removing the top panel
For side-opening ovens, the door must first be removed. On the upper part of the oven,
remove the 6 M5 screws, the door plate and the brackets holding it in place (circled below
in red).
Upper top panel screws
Front-opening ovens have the top panel attached to the sides. Remove the rear panel (see
next chapter) and then remove all the screws from the side of the top panel.

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1.3. Removing the real panel
1.3.1. COOK, iCOOK, BAKE, iBAKE
The following picture shows how to remove the rear panel. Remove the M5 screws circled
in red and pull the rear panel downwards.
Removing the rear panel

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1.3.2. BAKERSHOP 6 and 10 600x400 trays
For the 600x400 size BAKERSHOP model, remove the screws at the rear of the oven.
Removing the rear panel

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1.3.3. BAKERSHOP and SNACK of 3 and 4 trays
On BAKERSHOP and SNACK models with 3 and 4 trays, remove the screws at the rear of
the oven.
Removing the rear panel
1.4. Removing the side panel
The following picture shows how to remove the side panel. Remove the 4 screws circled in
red from the bottom of the left side.
Lower screws on the side

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To remove the screws on the upper side, the upper side of the oven must first be removed,
as they are the same. See Figure 2.
Open the side panel at the rear and pull it backwards. At this point the side panel should
release from the tabs on the chamber frame.
1.5. Removing the convection fan cover plate
The part that separates the cooking chamber with the fan and the heating element can be
removed to clean this area. First, remove the tray supports. Move them upwards and then
towards the inside of the oven.
Removing the tray supports (bolt-on models)
On some models, the guide supports are screwed to the cooking chamber. Unscrew and
proceed in the same way to remove the guides.
Removing the tray supports (screw models)

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Once the supports have been removed, repeat the same operation with the part that
separates the cooking chamber from the fan and the heating element. A flat-blade
screwdriver or other levering tool can be used to pry and make it easier.
Removing the protective plate (bolt-on models)
Removing the protective plate (screw models)

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Once it has been removed, it can be cleaned, either manually or automatically.
Use extreme caution when cleaning this part of the oven. Leave the door
ajar and wait until the chamber fan stops.
When this process has been completed, replace the chamber fan suction part in reverse
order.
1.6. Accessing the siphon
In ovens equipped with a siphon (COOK PRO, BAKE, iCOOK, and iBAKE), the siphon can
be accessed from the inside of the cooking chamber or from the bottom of the oven.
To access the siphon cooling pipes or the front water tray drain, remove the side panel.
Oven models that do not have a siphon condensation cooling system instead of the cooling
pipe will have a plug in the inlet.
Siphon
Cooling pipe
Water drain pipe
Siphon

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Recirculation siphon
Drain pipe
Recirculation pipe

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2. TROUBLESHOOTING
2.1. Checking electrical elements
By entering the relay test mode, the oven can activate each relay individually, operating the
element connected to it (motor, chimney solenoid, light, etc.).
To check the relays, see chapter 3.2.1.5.
To check the door sensor and the motor safety thermostat, see section 3.3.1.7.
2.2. Checking power supplies
Before starting a troubleshooting process, verify that the voltages are correctly reaching the
relay board, contactor (three-phase models only), and control board.
Dismantle the rear part to access the electronics (see 1.3).
2.2.1. Three-phase models
Check the voltage at the power connector.
Checking input voltages (three-phase models)

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N - L1 = 230VAC
N - L2 = 230VAC (only for ovens with three-phase connection)
N - L3 = 230VAC (only for ovens with three-phase connection)
If this is not the case, check the customer's power cable and electrical installation.
2.2.2. Single-phase models
Single-phase models do not have a general contactor, so the voltage must be measured at
the relay board terminals.
Checking input voltages (single-phase models)
Check that the voltage N - L is 230VAC.
2.2.3. Safety thermostat
Depending on the model, the reset button is located on the rear or bottom of the oven. If it
has tripped, press it.

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Reset safety thermostat (lower)
Reset safety thermostat (rear)
2.2.4. Safety contactor
The contactor is controlled by the safety thermostat on three-phase ovens. With the oven
switched on, press the power switch.

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ON/OFF switch
Open the rear of the oven and check that the safety contactor is armed.
Safety contactor checks
If not, check that the voltage between poles A1 and A2 is 230VAC. If not, check the condition
of the safety thermostat, the ON/OFF switch and the wiring between the three elements.

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2.2.5. Relay board LED status
Check that the LEDs on the power supply (green) and on the relay board (red) are lit up.
Correct voltage LED on power supply and Mychef relay board
If not, check the wiring condition between the contactor, power supply and relay board.
2.2.6. Communication cable
Check that the Modbus communication cable linking the relay board and the control board
is correctly inserted.

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Modbus cable between boards
2.2.7. Control board
The control board should switch on automatically when powered. If not, check the modbus
cable and the control board.
2.3.Solutions to common problems
2.3.1. The oven does not turn on
The oven must switch on and standby when the oven ON/OFF switch is pressed. When
doing so, in three-phase ovens we must listen to the interlocking of the general safety
contactor. See chapter 2.2.4. To start the oven, press the START/STOP button on the front
panel of the oven.
If this is not the case, check the following points step by step. Before doing so, check that
the power supply cable is properly connected and that no safety mechanism has been
activated in the customer's electrical installation (differential, magnetothermic, etc.).
Check the power supply, as specified in the chapter 2.2.

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2.3.2. The oven does not start
If an oven does not start, the door sensor may not detect that the door is properly closed.
On COOK, BAKE, iCOOK and iBAKE ovens, place a magnet near the door sensor area. If
the oven responds and the motor and resistor start, the problem is that the door is too far
away from the strut.
Door sensor (COOK, BAKE, iCOOK and iBAKE)
If placing a magnet next to the door sensor does not start the oven, check that the door
sensor is connected properly and that no wires are loose or cut.
The BAKERSHOP and SNACK models are equipped with a mechanical micro switch. Check
by manually pressing the switch.
Door sensor (SNACK and BAKERSHOP)
Check the door sensor cable on the relay board.