Fri-Jado STO6-INTELLIGENT User manual

WWW.FRIJADO.COM Service Manual STO6-i form 9123720 rev. 12/2008
SINGLE UNITS:
STO6-i UK
STO6-i EURO
SERVICE MANUAL
STO6-INTELLIGENT
- NOTICE -
This manual is prepared for the use of trained Service Technicians and should
not be used by those not properly qualified. If you have attended a training
for this product, you may be qualified to perform all the procedures in this
manual.
This manual is not intended to be all encompassing. If you have not attended a
training for this product, you should read, in its entirety, the repair procedure
you wish to perform to determine if you have the necessary tools, instru-
ments and skills required to perform the procedure. Procedures for which you
do not have the necessary tools, instruments and skills should be performed
by a trained technician.
Reproduction or other use of this Manual, without the express written consent of
Fri-Jado, is prohibited.
STACKED UNITS:
STO6-i+STG8-i TURBO
STO6-i+STG7-i TURBO
STO6-i+STO6-i

Service Manual STO6-i form.9123720 rev. 12/2008
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TABLE OF CONTENTS
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Service Manual STO6-i form.9123720 rev. 12/2008 Page 3
TABLE OF CONTENTS
INDEX
Index............................................................................................................................................ 3
General technical data ............................................................................................................... 5
Programming instructions for the STO6-I................................................................................. 6
Mains supply .............................................................................................................................................................................. 6
Display and keys ........................................................................................................................................................................ 6
General information.................................................................................................................................................................. 7
Starting the unit ........................................................................................................................................................................ 7
Switching off the unit ............................................................................................................................................................... 7
Programming functions ............................................................................................................................................................ 8
Programming menu .................................................................................................................................................................. 8
Example of adding a program.................................................................................................................................................. 8
Program start ............................................................................................................................................................................. 9
Stop a program.......................................................................................................................................................................... 9
Introduction ............................................................................................................................................................................. 10
Reaching the parameter menus ............................................................................................................................................. 10
Parameter listing STO6-i .......................................................................................................... 10
Adapting parameters .............................................................................................................................................................. 11
Removal and replacement of parts ........................................................................................ 12
Right or left side panel............................................................................................................................................................ 12
Top cover.................................................................................................................................................................................. 12
Rear panel ................................................................................................................................................................................ 12
Removal of the tray supports right and left side .................................................................................................................. 13
Removal of the filter assembly ............................................................................................................................................... 13
Fuse........................................................................................................................................................................................... 14
Halogen lamp (holder) ............................................................................................................................................................ 14
Electronic transformer............................................................................................................................................................. 14
Power / I/O board and fan control board .............................................................................................................................. 15
High limit thermostat.............................................................................................................................................................. 15
Contactor ................................................................................................................................................................................. 16
PT1000 sensor .......................................................................................................................................................................... 16
Heating element...................................................................................................................................................................... 16
Glass panel with back plate .................................................................................................................................................... 17
Cooling fan .............................................................................................................................................................................. 18
CPU board ................................................................................................................................................................................ 18
Blower motor........................................................................................................................................................................... 19
Blower capacitor...................................................................................................................................................................... 19
Main switch.............................................................................................................................................................................. 20
Door switch .............................................................................................................................................................................. 20
Door adjustment (left side)..................................................................................................................................................... 20
Door glass inside...................................................................................................................................................................... 21
Replacement of door glass outside ........................................................................................................................................ 21
Electrical tests and service procedures.................................................................................... 22
PT 1000 Sensor ......................................................................................................................................................................... 22
Heating element...................................................................................................................................................................... 22
Main switch.............................................................................................................................................................................. 22
Door switch .............................................................................................................................................................................. 23
Troubleshooting for the STO6-i ............................................................................................... 24
Trouble shooting list................................................................................................................................................................ 24

Service Manual STO6-i form.9123720 rev. 12/2008
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TABLE OF CONTENTS
Exploded views & partlists....................................................................................................... 26
Electrical diagrams .................................................................................................................... 32
Appendix .................................................................................................................................... 1
Replacement of shaft sealing for blower moter ovens ........................................................................................................... 2

GENERAL TECHNICAL DATA
Service Manual STO6-i form.9123720 rev. 12/2008 Page 5
GENERAL TECHNICAL DATA
This manual covers the STO 6-i series ovens. They are based on a STG SB (Solid Back) housing
and can only be stacked with SB housings such as another STO 6-i , a STG 8-i Turbo and STG
7-i Turbo
• ST06-i is a Super Turbo Oven with a special outer glass that protects against high tempera-
tures. It is provided with 6 racks and operated by means of an I-control panel
There are 2 versions:
The UK version, that has a main switch and a shielded cable of 3 meters with plug.•
The EURO version, that has no main switch and a standard cable of 3 meters with plug.•
When units are stacked, both I-control units are placed in the upper unit . Mains supply is
connected internally and comes out as one cable with plug. In the UK version the cable
comes out of the upper unit, in the EURO version it comes out of the lower unit.
All of the information, illustrations and specifications contained in this manual are based on
the latest product information available at the time of printing.
Type STO-6i single ST0-6i stacked
Power 11.200 W max. 22.400 W
Fuses needed with power connection
400V, 3N~50...60 Hz
(3 phases with zero)
3 x 16A 3 x 32A
Power connection 400/230V, 3N~50..60 Hz 400/230V, 3N~50..60 Hz
Standard plug from factory CEE-form
5-pole
16A 32A
Net weight 175 kg max. 360 kg
Gross weight 215 kg max. 440 kg
Height 1025 mm 2100 mm
Width 985 mm 985 mm
Depth 865 mm 865 mm
Tools
• Standard set of tools.
• Metric wrenches, sockets and hex socket key wrenches.
• Multi meter and AC current clamp meter.
• Temperature tester.
• Insulation value tester (Megger).
• Field Service Grounding Kit.
TECHNICAL DATA

PROGRAMMING INSTRUCTIONS
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PROGRAMMING INSTRUCTIONS FOR THE STO6-I
MAINS SUPPLY
If there is a main switch present ,turn it to
“1”. Power will be supllied to the STO now.
DISPLAY AND KEYS
Start/Pause key
OK/Enter key
On/Off key
Selection keys (3x)
Display
Door open(not used)
Turning knob
Stop/Cancel key

PROGRAMMING INSTRUCTIONS
Service Manual STO6-i form. 9123720 rev. 12/2008 Page 7
STARTING THE UNIT
Press and hold the On-Off key for 2 seconds.
The display lights up and the oven is ON.
On/Off key
SWITCHING OFF THE UNIT
Press and hold both keys On/Off and Settings
until the display light goes out and the oven
is turned OFF.(this will take about 3 seconds.)
GENERAL INFORMATION
The steps described in this chapter are a summary of the steps described in
form 9123687 - Service Manual I-control.
Please refer to this manual for further information about the function you
want to perform.

PROGRAMMING INSTRUCTIONS
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PROGRAMMING MENU
PROGRAMMING FUNCTIONS
- Adding a program
- Editing a program
- Deleting a program
- Testing a program
- Sorting programs
Note: When the oven is protected by a pin-
code, ask the manager to give in the pincode
or read the pincode in the service menu. This
is described in chapter 05-parameter listings
or in the I-control manual, chapter 6B.
Choose the function you want to perform by
using the turning knob or arrows and con-
firm with OK
Note:
With the test program, you can change va-
lues during the run.
Be aware that these values will be saved
when leaving this program with OK.
Overview of program functions
EXAMPLE OF ADDING A PROGRAM
In the time row select the cell and confirm
with OK. Set the time of the cooking step
with he turning knob and confirm with OK.
In the temperature column select the
corresponding cell and confirm with OK. Set
the temperature of the cooking step and
confirm with OK.
In the blower speed column the speed of the
blower can be set to 1 to 4.
It is possible to program a HOLD
temperature. Select the next cell in the time
column and set this to HOLD by turning the
knob counter clockwise and confirm with OK.
Select a temperature as described earlier.
Select save and confirm with OK.
- Turning knob: in menu: Selecting function
in field: changing value
- Arrows: selecting function or field
in field: changing value
- OK : Confirming your choice.
- Cancel: interrupt /stop
Overview of keyboard functions

PROGRAMMING INSTRUCTIONS
Service Manual STO6-i form. 9123720 rev. 12/2008 Page 9
PROGRAM START
Press the operate key.
Select a program with the turning knob and
confirm with OK.
When no preheating is activated, the process
starts and is indicated by means of a heating
diagram.
Press the cancel key.
Confirm the cancellation by selecting YES
and pressing the OK key.
STOP A PROGRAM

PARAMETER LISTINGS
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Note: Please make sure you read the paragraph titled “adapting parameters” 1212 before
changing parameters. It contains important information concerning the programming of the
parameters.
INTRODUCTION
REACHING THE PARAMETER MENUS
To reach the settings menus, press the far
right settings key. These are located above the
screen of the control system.
There are three different options in this
screen: “information”, “manager” and “ser-
vice”.
To access the different sections, select an
option using the turning knob or arrow keys
and confirm with OK.
To leave a section use the “cancel” key.
Note: The service section is by default
protected with a default password of “4878”.
Note: The manager section can be protected
by a seperate password, this password can be
set inside the manager menu. It is possible to
view the password through the service menu.
PARAMETER LISTING STO6-I
This chapter describes how to reach the parameters in the unit and where to
find more information about them.
Please refer to form 9123687 - Service Manual I-control for more detailed infor-
mation about the function you want to perform or the parameter value(s) you
want to check or change.

PARAMETER LISTINGS
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The i-control system utilises a large set of parameters, of which a select group is open to
customization. This means that these parameters can be adjusted to offer functionality
more fitting to the intended purpose of the unit.
Manager parameters:
The manager parameters are open to modification. It is important to know what a parame-
ter does before changing it. A detailed description of all parameters can be found in
I-control manual.
Service parameters: (see I-control manual.)
The parameters marked in grey are considered critical and should not be changed. If a para-
meter needs to be adjusted , the Fri-jado Service Department will contact you with a request
to make the adjustment.
Generally speaking all other service parameters are considered important and can only be
adjusted within the values listed in the parameter list in this document.
Before changing a parameter be aware of the consequences that it might have for a correct
working of the unit.
When you are not sure, please contact the Fri-Jado Service Department first to prevent pos-
sible damage or unwanted behaviour of the unit.
ADAPTING PARAMETERS

REMOVAL AND REPLACEMENT OF PARTS
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WARNING: Disconnect the electrical power to the machine at the main circuit
box or pull the plug. Place a tag on the circuit box indicating the circuit is
being serviced.
REMOVAL AND REPLACEMENT OF PARTS
1. Remove the 4 screws that secure the
panel to the frame.
2. Remove the panel
3. Reverse the procedure to install.
Remove the left side panel according1.
prior procedure.
Remove the screws securing the top cover.2.
Remove the top cover. (Lift at left side3.
and remove to the left).
Reverse the procedure to install.4.
RIGHT OR LEFT SIDE PANEL
TOP COVER
Remove the top cover according1.
prior procedure.
Remove the 2 screws securing the rear2.
panel.
Remove the panel by lifting it and pulling3.
it out of the holes.
Reverse the procedure to install.4.
REAR PANEL

REMOVAL AND REPLACEMENT OF PARTS
Service Manual STO6-i form.9123720 rev. 12/2008 Page 13
REMOVAL OF THE TRAY SUPPORTS RIGHT AND LEFT SIDE
REMOVAL OF THE FILTER ASSEMBLY
Remove the trays or racks1.
Remove the tray supports by lifting them2.
out of their support pins and pulling them
to the centre of the cabinet.
Remove the tray support out of the cabi-3.
net.
Reverse the procedure to install them. The4.
right and left side cannot be swapped and
therefore they are marked R(right) and
L(left).
The filters itself can be removed by lifting
them and pulling them from the support
pins.
Removing the whole assembly:
Remove the tray supports as described1.
above.
Lift the filter assembly by means of the 22.
grips and pull it towards yourself.
Reverse the procedure to install.3.

REMOVAL AND REPLACEMENT OF PARTS
Service Manual STO6-i form. 9123720 rev. 12/2008
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Replacing the lamp or glass:
Remove the glass by turning the glass coun-
ter clockwise. Replace the glass or lamp.
Replacing the lampholder:
On a single unit or on the top side of a
stacked unit(UK) : remove the top cover and
access the connector and lampholder from
this side. See photo 1 + 2.
Otherwise:
Remove the glass and lamp. See above.1.
Bend the 4 flaps on the inside straight2.
with a screwdriver and push them back.
The lampholder should come out now.
Lower the lampholder until the connector3.
is on the inside of the cabinet.(photo 1)
Disconnect the wiring from the connector.4.
Remove the holder. Take a new holder,5.
reconnect the wiring and click it in the
ceiling.
Put the lamp back in or replace it and put6.
the glass back by turning it clockwise.
HALOGEN LAMP (HOLDER)
Remove the right side panel according1.
prior procedure.
Remove the wiring.2.
Remove the screws that secures the trans-3.
former (bottom side) and remove the
transformer.
Reverse the procedure to install.4.
ELECTRONIC TRANSFORMER
FUSE
Remove the right side panel according1.
prior procedure.
The fuse is situated just above the contac-2.
tor on the electrical panel (see arrow and
exploded view of electr. assembly)
Push the fuseholder open with a screwdri-3.
ver and measure the fuse.
Replace it by the same type and value.4.
Reverse the procedure to install.5.
Transformer must be placed as shown in the right
photo, because of the thermal fuse that is inside the
transformer.
Photo 1: connecting/disconnecting wires
Photo 2: deform lampholder if necessary
12

REMOVAL AND REPLACEMENT OF PARTS
Service Manual STO6-i form.9123720 rev. 12/2008 Page 15
Remove the right side panel according1.
prior procedure.
Disconnect wiring and flat cable on the2.
board you want to remove.
Number or mark the wiring if necessary.3.
Remove the board from the clips by pres-4.
sing the clips together.
Reverse the procedure to install.5.
POWER / I/O BOARD AND FAN CONTROL BOARD
Remove the right side panel according1.
prior procedure.
Measure inside the cabinet how far the2.
sensor comes out of the side panel.
Remove the sensor by loosening the nut3.
and pulling it out of the cabinet.
Remove the screws on the electric panel4.
that secure the thermostat.
Remove the thermostat and disconnect5.
the wiring.
Reverse the procedure to install. Place the6.
sensor in the same position as measured
before.
HIGH LIMIT THERMOSTAT

REMOVAL AND REPLACEMENT OF PARTS
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Remove the right side panel according1.
prior procedure.
Disconnect the wires to the contactor.2.
Push down the locking tab and remove3.
the contactor from the mounting bracket.
Reverse the procedure to install.4.
CONTACTOR
Remove the right side panel according to1.
prior procedure.
Disconnect the wiring of the sensor from2.
the powerboard.
Measure in the cabinet how far the sensor3.
comes out of the side panel.
Loosen the nut that secures the sensor4.
and remove the sensor.
Reverse the procedure to install. Replace5.
the sensor in the same position that you
measured before.
.
PT1000 SENSOR
Remove the rear panel according to prior1.
procedure.
Remove the tray supports left and right2.
according to prior procedure.
Remove the filter plate according to prior3.
procedure.
Disconnect the wiring from the element.4.
at the rear side. See Note 1.
Remove the mounting screws from the5.
front side.
HEATING ELEMENT

REMOVAL AND REPLACEMENT OF PARTS
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Remove the right side panel according1.
prior procedure.
Remove the screws that secure the small2.
top cover plate and remove that cover
plate.
Remove the 2 nuts on the rear side of the3.
operating panel.
Remove the nut from the ground wire on4.
the main board and remove the ground
wire.
Remove the grey flat cable from the main5.
board.
Lift the operating panel out of the loc-6.
king slots and remove the panel.
Remove the flatcables on the CPU board.7.
Remove the 4 nuts that secure the main8.
board and remove the board.
Reverse the procedure to install.9.
Note:On a stacked unit both i-controls are
located on the top unit.
GLASS PANEL WITH BACK PLATE
6. Remove the element out of the cabinet-
from the front side.
7. Reverse the procedure to install.
Note 1:
When disconnecting or connecting the
wiring, secure the element by holding the
rear nut with an open-ended spanner.

REMOVAL AND REPLACEMENT OF PARTS
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COOLING FAN
Remove the right panel side according1.
prior procedure.
Loosen the screws from the small top co-2.
ver at the rearside for about 10 mm.
Disconnect the wiring from the power3.
board.
Remove the small rear panel by loosening4.
the 2 M5 nuts and lifting the rear panel
out of the slotted holes.
Remove the 4 screws from the outside en5.
remove the fan.
Reverse the procedure to install.6.
CPU BOARD
Remove the right side panel according1.
prior procedure.
Remove the nut from the ground wire on2.
the cpu board and remove the ground
wire.
Remove the grey flat cable from the CPU3.
board.
Loosen de keyboard connectors. (see ar-4.
rows)
Remove the 4 nuts that secure the CPU5.
board. Be careful not to damage the com-
ponents on the board near the nuts.
Remove the board.6.
Reverse the procedure to install.7.
Note:On a stacked unit both i-controls are
located on the top unit.

REMOVAL AND REPLACEMENT OF PARTS
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BLOWER CAPACITOR
Remove the right panel side according1.
prior procedure.
Disconnect the defective capacitor.2.
Remove the bracket from the cabinet.3.
Replace the defective capacitor.4.
Reverse the procedure to install.5.
BLOWER MOTOR
Remove the right panel side according1.
prior procedure.
Remove the rear panel according prior2.
procedure.
Remove the filter assembly according3.
prior procedure.
Remove the fan blades of the 2 blowers,4.
that are on the same vertical subframe.
Disconnect the 2 blowers from the fan-5.
board. If they are not numbered, please
do so before disconnecting them.
Remove the subframe, pull the wiring6.
through the gap in the side plate.
Replace the defective motor.7.
Place new shaft seals for both motors!!8.
See appendix “Replacement of shaft sea-
ling” for more details.
9. Reverse the procedure to install.
Note: Keep the fan blades and blowers with
the same numbers together as a set.

REMOVAL AND REPLACEMENT OF PARTS
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DOOR SWITCH
Remove the right panel side according1.
prior procedure.
Open the door.2.
Remove both screws of the bracket, that3.
holds the microswitch.
Remove the microswitch from the bracket4.
and replace it by a simular one.
Switch the wiring from the old to the new5.
switch
Mount the bracket and check that the6.
switch works OK by measuring the con-
tacts (zero ohms) when the door is closed.
Remove the left side panel according1.
prior procedure.
Loosen the nuts of the upper hinge a bit.2.
The door must be closed.
Loosen the locknut and adjust the bolt in3.
or out to adjust the door.
Tighten the nuts of the hinge and mount4.
the left side panel.
DOOR ADJUSTMENT (LEFT SIDE)
MAIN SWITCH
DISCONNECT THE MAINS SUPPLY !!!1.
Remove the right panel side according2.
prior procedure.
Disconnect the wiring from the switch,3.
if they are not numbered, please do so
before disconnecting them.
Remove the cap and the knob at the front4.
Loosen both screws and the switch will5.
come off.
Reverse the procedure to install.6.