Fri-Jado STG8 P User manual

MODELS
Programmable controls STG8 P
Versions:
Solid Back
Pass-Through
Pass-Through with rotor button
WWW.FRIJADO.COM Service Manual STG8 P form 9123539 rev. 04/2014
SERVICE MANUAL
STG ROTISSERIE OVEN MODELS
Model STG8 P solid back
- 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 trianing 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
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, instruments 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.

Page 2 Service Manual STG8 P form 9123539 rev. 04/2014

Versions
Version Issue date
dd/mm/yy
Remarks
02/2007 01/02/2007 First release.
04/2010 01/04/2010 Textual changes. Troubleshooting adaped.
03/2014 01/03/2014 Textual changes. Electrical tests adaped.
Page 3
Service Manual STG8 P form 9123539 rev. 04/2014

Page 4 Service Manual STG8 P form 9123539 rev. 04/2014
INDEX
Index .......................................................................................................................................................... 4
General technical data.............................................................................................................................. 6
Technical Data .................................................................................................................................. 6
Programming instructions for the STG8 P............................................................................................... 7
Optional settings for the HR8 P............................................................................................................... 9
Removal and replacement of parts for the STG8 P .............................................................................. 11
Right or left side panel.................................................................................................................. 11
Top cover ........................................................................................................................................ 11
Knob ............................................................................................................................................... 11
Operating panel............................................................................................................................. 12
Electric panel.................................................................................................................................. 12
Display ............................................................................................................................................ 13
Panel and keypad assembly .......................................................................................................... 13
Namepanel ..................................................................................................................................... 13
Ceramic Element ............................................................................................................................ 14
Halogen Lamp Holder ................................................................................................................... 14
Transformer halogen lamps .......................................................................................................... 15
Electronic Transformer halogen lamps (till serial number 100044773) ...................................... 15
Power and I/O board ..................................................................................................................... 15
High limit thermostat .................................................................................................................... 16
Main switch .................................................................................................................................... 16
Contactor........................................................................................................................................ 17
Blower motor ................................................................................................................................. 17
Blower motor bottom rotisserie (stacked STG8 P)....................................................................... 18
PT500 sensor................................................................................................................................... 18
Drive motor .................................................................................................................................... 19
Heating element ............................................................................................................................ 20
Door adjustment (left side) ........................................................................................................... 20
Door glass inside ............................................................................................................................ 20
Door outside ................................................................................................................................. 21
Electrical tests and service procedures.................................................................................................. 22
Heating element test..................................................................................................................... 22
Contactor, drive motor and blower test....................................................................................... 22
PT500 Sensor test ........................................................................................................................... 23
Keypad test .................................................................................................................................... 23
Control location ............................................................................................................................. 24

Page 5
Service Manual STG8 P form 9123539 rev. 04/2014
General troubleshooting list.................................................................................................................. 25
Troubleshooting the STG 8 P rotisserie......................................................................................... 25
Analytic troubleshooting list ................................................................................................................. 26
Servicing and repairing of the rotisserie STG 8 P......................................................................... 26
STG8 P solid back - sheet iron work.............................................................................................. 32
STG8 P solid back - components ................................................................................................... 34
STG8 + 8P solid back - sheet iron work......................................................................................... 36
STG8 + 8P solid back - components .............................................................................................. 38
STG8 + 8P with keypad protection, solid back - sheet iron work ............................................... 42
STG8 + 8P with keypad protection, solid back - components..................................................... 44
STG8 + 8P pass-through with keypad protection and rotor button - sheet iron work ............. 46
STG8 + 8P pass-through with keypad protection and rotor button - components ................... 48
Electrical diagrams.................................................................................................................................. 51
STG8 P solid back - circuit diagram............................................................................................... 51
STG8 P solid back - circuit diagram (till serial number 100044773) ............................................ 52
STG8 P solid back - wiring diagram (till serial number 100044773)............................................ 53
STG8 P solid back - circuit diagram (till 31-12-2006).................................................................... 54
STG8 P solid back - wiring diagram (till 31-12-2006) ................................................................... 55
STG8 P + rotor switch - circuit diagram ........................................................................................ 56
STG8 P + rotor switch - circuit diagram (till serial number 100044773) ..................................... 57
STG8 P + rotor switch - wiring diagram (till serial number 100044773)..................................... 58
STG8 P + rotor switch - circuit diagram (till 31-12-2006)............................................................. 59
STG8 P + rotor switch - circuit diagram (till 31-12-2006)............................................................. 60

Page 6 Service Manual STG8 P form 9123539 rev. 04/2014
GENERAL TECHNICAL DATA
This manual covers the STG8 P series rotisserie ovens. Ovens will also be delivered in stacked
versions.
• STG8 P - Oven with eight spits ( 32 to 40 chickens )
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 STG 8 Pass Through STG 8 P Solid Back
Power 10.500 W 10.500 W
Fuses needed with power connection
400V, 3N~50...60 Hz
(3 phases with zero)
3 x 16A 3 x 16A
Fuses needed with power connection
200 or 230V, 3~50...60 Hz
(3 phases without zero)
3 x 32A 3 x 32A
Standard plug from factory 5-pole
Acc IEC309 and CEE-form
16A
3P+N+E
16A
3P+N+E
Net weight 181 kg 181 kg
Gross weight 217 kg 217 kg
Height 1025 mm 1025 mm
Width 985 mm 985 mm
Depth 865 mm 850 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.
GENERAL TECHNICAL DATA
TECHNICAL DATA

Temperature Display
Program indicators
Program keys
Buzzer key
Probe key
Temperature key
Up-Down key
Time key
Time Display
Temperature indicator
Second step indicator
First step indicator
Start / Stop
Rotor key
Time of day
Program end
Second grilling step
First grilling step
Temperature hold process
8888888210 0030
Page 7
Service Manual STG8 P form 9123539 rev. 04/2014
PROGRAMMING INSTRUCTIONS
PROGRAMMING INSTRUCTIONS FOR THE STG8 P
DISPLAY AND KEYS
SETTING THE STG8 P
When the main switch is turned to “1” the
display lights up and the rotisserie is ON.

888210 88881040 888
P01 888815pr
888
P01 8888prog 888000 88880040
888210 88880040 888000 88880030
Page 8 Service Manual STG8 P form 9123539 rev. 04/2014
PROGRAMMING INSTRUCTIONS
SETTING ACTUAL TIME 15 PROGRAMS
Press and hold Time of
day key
Press Up or Down key
Release Time of day key
After the unit is swit-
ched-on the time display
indicates: 15PR
Key 1:
1x = program 01
2x = program 06
3x = program 11
Key 2:
1x = program 02
2x = program 07
3x = program 12
ENTERING A PROGRAM
Select Program number
Press both Up and Down
keys during 2 seconds
FIRST COOKING STEP (TIME)
Press Cooking process
key
Cooking symbol lights
up
Press and hold the Time
key
Press Up or Down key
SECOND COOKING STEP (TIME)
Press Grilling process key
Grilling symbol lights up
Press and hold the Time
key
Press Up or Down key
FIRST COOKING STEP (TEMP.)
Press and hold the Tem-
perature key
Press Up or Down key

888180 88880030 888085 88880000
888085 88880000 888000 88880040
888195 88880046 888
P01 88881055
Page 9
Service Manual STG8 P form 9123539 rev. 04/2014
PROGRAMMING INSTRUCTIONS
Press Temperature Hold
process key
Temperature Hold sym-
bol lights up
Press and hold the Tem-
perature key
Press Up or Down key
Press Start / Stop key
On indicator lights up
Press Rotor key to start
turning the rotor
Press Rotor key again to
stop
Load the rotisserie with
products
SECOND COOKING STEP (TEMP.) TEMPERATURE HOLD
Press and hold Tempera-
ture key
Press Up or Down key
LOADING PROGRAM
Press program number
to load pre-set values
PROGRAM START & LOADING
INTERRUPTING ACTIVE PROGRAM
Press Rotor key
Heaters and front lamp
switch off
Rotor stops
On indicator is blinking
Process time in hold
OPTIONAL SETTINGS FOR THE HR8 P
SET ADDITIONAL BUZZER SIGNAL
Select a pre-defined
program
Press and hold Buzzer
key
Press Down key

888
P01 88881030 888210 88880040
888200 88880035 888prh 88880059
888085 88880046
Page 10 Service Manual STG8 P form 9123539 rev. 04/2014
PROGRAMMING INSTRUCTIONS
Select a pre-defined
program
Press and hold the Pro-
gram end key
Press Up key
Press and hold Tempera-
ture or Time key
Adjust temperature or
time with Up or Down
key
SET PROGRAM END TIME DISPLAY SET TIME & TEMPERATURE
Select a pre-defined
program
Press Cooking, Grilling
or Temperature hold key
No time indictaion for
Temperature hold
Visible during process or
program selection
ADJUSTING ACTIVE PROGRAM
TEMPERATURE PROBE (OPTIONAL)
Press the Rotor key
Insert the probe in the
meat up to the core
Press Temperature sen-
sor key; after 20 seconds
the temperature reading
swtiches off
PREHEAT INDICATION
Under 40°C (104°F) the
display shows PRH
INDICATIONS DURING PROCESS
• Process indicators shows actual process
after completion indicator switches off.
• Time display shows remaining program
time which is the sum of the remaining
cooking and grilling time.
• Temperature display indicates actual
temperature in the grill. Under 40°C
(104°F) the display shows PRH (preheat).
• When remaining time reaches 0, the
process indicators and the On-indicator
switches off.

Service Manual STG8 P form 9123539 rev. 04/2014 Page 11
REMOVAL AND REPLACEMENT OF PARTS
WARNING: Disconnect the electrical power to the machine
at the main circuit box. Place a tag on the circuit box indica-
ting the circuit is being serviced.
1. Remove the screws that secure the panel
to the frame.
2. Remove the panel.
3. Reverse the procedure to install.
1. Remove the left side panel according
prior procedure.
2. Remove the screws securing both large
and small top covers.
3. Remove the top cover. (Lift at left side
and remove to the left).
4. Reverse the procedure to install.
1. Remove cover plate on the knob with a
small screw driver.
2. Loosen the srew inside the knob.
3. Remove the knob with ring.
4. Reverse the procedure to install.
Note: check that the ring behind the knob
is in the right position and runs free from
the panel.
REMOVAL AND REPLACEMENT OF PARTS FOR THE STG8 P
RIGHT OR LEFT SIDE PANEL
TOP COVER
KNOB

Service Manual STG8 P form 9123539 rev. 04/2014
Page 12
REMOVAL AND REPLACEMENT OF PARTS
1. Remove the right side panel according
prior procedure.
2. Remove the knobs according prior proce-
dure.
3. Remove the screw that secures the panel.
4. Remove the 2 bolts on the backside of the
operating panel.
5. Remove the screws that secure the meat
probe holder and remove the holder (if
supplied).
6. Remove the flatcable on the power sec-
tion.
7. Remove the clip on the back, top left side
that secures panel and frame.
8. Remove the operating panel.
9. Reverse the procedure to install.
1. Remove the operating panel according
prior procedure.
2. Remove on the front side the screws that
secure the panel.
3. Remove on the inside bottom of the elec-
tric panel the bolt and nuts.
4. Disconnect the wiring.
5. Slide the electrical panel backwards.
6. Reverse the procedure to install.
OPERATING PANEL
ELECTRIC PANEL

Service Manual STG8 P form 9123539 rev. 04/2014 Page 13
REMOVAL AND REPLACEMENT OF PARTS
1. Remove the right side panel according
prior procedure.
2. Disconnect the flatcable on the display.
3. Remove the clip on the back, top left side
that secures panel and frame.
4. Remove the nuts and washers on the
backside of the display and remove the
metal cover.
5. Remove the nuts and plastic rings that
secure the board and remove the board.
Do not forget to disconnect the blue con-
nector on the board.
6. Reverse the procedure to install.
1. Remove the operating panel according
prior procedure.
2. Remove the display according prior proce-
dure.
3. Remove the nuts that secure the panel
with foil and remove panel.
4. Reverse the procedure to install.
1. Remove the operating panel according
prior procedure.
2. Remove the 4 nuts that secure the panel
and remove the panel.
3. Reverse the procedure to install.
DISPLAY
PANEL AND KEYPAD ASSEMBLY
NAMEPANEL

Service Manual STG8 P form 9123539 rev. 04/2014
Page 14
REMOVAL AND REPLACEMENT OF PARTS
1. Remove the rotor discs, suction and fan
plate according prior procedures.
2. Remove the 3 screws that secure the re-
flector ass. and lower the reflector.
3. Loosen the bolts that secure the cover
plate and turn the cover plate open to-
wards yourself.
4. Lower the reflector until the connector is
on the inside of the cabinet.
5. Remove the wiring of the ceramic element
on the connector.
6. Remove the ceramic element from the
reflector by sliding off the clip.
7. Reverse the procedure to install.
Note: On a single unit or on the top side of
a stacked unit it is easier to remove the top
plate and access the connector from this side.
CERAMIC ELEMENT
1. Remove the screws that secure the lamp
holder.
2. Lower the lamp holder until the connector
is on the inside of the cabinet.
3. Remove the glass and lamp from the lamp
holder. Turning direction of glass is coun-
ter clockwise.
4. Remove the wiring of the lamp on the
connector.
5. Remove the holder. You have to deform
the holder to take it out.
6. Insert a new holder and click this in.
7. Reverse the procedure to install.
Note: On a single unit or on the top side of
a stacked unit it is easier to remove the top
plate and access the connector from this side.
HALOGEN LAMP HOLDER

JP3 & JP4
Service Manual STG8 P form 9123539 rev. 04/2014 Page 15
REMOVAL AND REPLACEMENT OF PARTS
1. Remove the right side panel according
prior procedure.
2. Disconnect wiring and flatcable on the
board.
3. Remove the board from the clips by pres-
sing the clips together.
4. Reverse the procedure to install.
Note: When installing new board, ensure
that JP3 and JP4 on new board are set the
same as on the old board.
POWER AND I/O BOARD
1. Remove the right side panel according
prior procedure.
2. Remove the screw that secures the cover
plate and remove the cover plate.
3. Remove the wiring.
4. Remove the screw that secures the trans-
former and remove the transformer.
5. Reverse the procedure to install.
ELECTRONIC TRANSFORMER HALOGEN LAMPS (TILL SERIAL NUMBER 100044773)
TRANSFORMER HALOGEN LAMPS
1. Remove the right side panel according
prior procedure.
2. Remove the wiring.
3. Remove the screws that secures the trans-
former (bottom side) and remove the
transformer.
4. Reverse the procedure to install.

Service Manual STG8 P form 9123539 rev. 04/2014
Page 16
REMOVAL AND REPLACEMENT OF PARTS
1. Remove the right side panel according
prior procedure.
2. Remove the suction and fan plate on the
inside of the oven.
3. Remove the thermostat-probe from the
clip in the oven and guide it outside
through the opening in the side wall.
4. Remove the screws on the electric panel
that secure the thermostat.
5. Remove the thermostat and disconnect
the wiring.
6. Reverse the procedure to install.
Note: Set the new high limit thermostat to its
maximum position.
1. Remove the instrument panel according
prior procedure.
2. Loosen the screws on the electric panel
that secure the switch.
3. Remove the switch and disconnect the
wiring.
4. Reverse the procedure to install.
HIGH LIMIT THERMOSTAT
MAIN SWITCH

Service Manual STG8 P form 9123539 rev. 04/2014 Page 17
REMOVAL AND REPLACEMENT OF PARTS
1. Remove the right side panel according
prior procedure.
2. Disconnect the lead wires to the contactor.
3. Push the locking tab down with a screw
driver and lift the contactor out to remove
it from the mounting bracket.
4. Reverse the procedure to install.
1. Remove the right side panel and the top
cover according to prior procedures.
2. Remove the rotor discs, suction and fan
plate in the oven.
3. Remove the wing nut on the fan blade and
remove fan blade. (Left handed threads)
4. Disconnect wiring of the motor.
5. Remove the screws that secure the motor
and remove the motor.
6. Reverse the procedure to install.
Note: The blowers are equipped with a capaci-
tor of 1,5 uF. Check the direction of rotation of
the motor (clockwise, see arrow) and change
the wiring if necessary.
CONTACTOR
BLOWER MOTOR

Service Manual STG8 P form 9123539 rev. 04/2014
Page 18
REMOVAL AND REPLACEMENT OF PARTS
1. Remove the right side panel according
prior procedures.
2. Remove the rotor discs, suction and fan
plate on the ceiling inside the bottom
oven.
3. Remove the wing nut on the fan blade
and remove fan blade. Left handed
threads.
4. Remove fat drawer from the upper oven.
5. Remove the bolts that secure the interme-
diate plate and remove this plate.
6. Remove the drip trays from the upper
oven.
7. Remove the bolts that secure the top plate
and remove the top plate.
8. Disconnect the wiring of the motor.
9. Remove the screws that secure the motor
and remove the motor.
10. Reverse the procedure to install.
Note: The blowers are equipped with a capa-
citor of 1,5 uF. Check the direction of rotation
of the motor (clockwise, see arrow) and chan-
ge the wiring if necessary.
1. Remove the right side panel according to
prior procedure.
2. Disconnect the wiring of the sensor.
3. Remove the screw that secures the sensor
and remove the sensor.
4. Reverse the procedure to install.
Note: The wiring cable is an insulated cable
with an earthing screen.
BLOWER MOTOR BOTTOM ROTISSERIE (STACKED STG8 P)
PT500 SENSOR

Service Manual STG8 P form 9123539 rev. 04/2014 Page 19
REMOVAL AND REPLACEMENT OF PARTS
DRIVE MOTOR
1. Remove the right side panel and rotor discs
according prior procedure.
2. Disconnect the wiring of the motor. Check
where the wire, marked A is connected.
3. Remove the screws that secure the fan co-
ver and remove the cover.
4. Set the drive arm in a position vertical
downwards. This can be done electrically by
pushing the rotor key or manually by turning
the fan blade by hand.
5. Note down how far the drive arm sticks out
from the inner wall (see white arrow).
6. Mark the position of the motor on the sup-
port and the support on the side wall with a
marker.
7. Remove the bolts that secure the motor and
the nuts that secure the motor support and
remove the motor.
8. Check the white Teflon ring. Replace this if
necessary.
9. Check the position of the red gasket bet-
ween motor support and the side wall. Repla-
ce this if necessary.
10. Install the fan blade of the old motor on
the new motor.
11. Reverse the procedure to install.
Note: Always make a test run of 15 minutes
on maximum temperature to insure the motor
is well mounted and adjusted and turns paral-
lel to the side wall.

A
A
B
C
Service Manual STG8 P form 9123539 rev. 04/2014
Page 20
REMOVAL AND REPLACEMENT OF PARTS
1. Remove the left side panel according prior
procedure.
2. Loosen the nuts (A) of the upper hinge.
The door must be closed.
3. Loosen the locknut (B) and adjust the bolt
(C) in or out to adjust the door.
4. Tighten the nuts of the hinge and mount
the left-hand panel.
1. Lift the door upward out of the hinges
and place on a table.
2. Remove the cap nuts and rings on the pro-
files of the door.
3. Remove the profiles from the glass.
4. Mount the profiles on the new glass. Do
not forget the teflon rings of 2 mm inside
the holes.
5. Mount the cap nuts and rings.
Note! Tightening of nuts max. 6 Nm.
6. Place the door in the hinges.
DOOR ADJUSTMENT (LEFT SIDE)
DOOR GLASS INSIDE
1. Remove the rotor discs, right side panel,
suction and fan plate according prior pro-
cedures.
2. Disconnect the wiring from the element.
3. Remove the mounting nut.
4. Remove the element from the mounting
clip and pull it from the wall.
5. Reverse the procedure to install.
HEATING ELEMENT