Fisher & Paykel OB24SDPX1 User manual

599468
Service Manual
Built in Ovens
Model:
OB24SDPX1

599468 SEPTEMBER 2007
The model covered by this manual is listed on the front cover.
The information detailed in this manual is subject to change without notice. The latest version is indicated by
the reprint date and replaces any earlier editions.
The front cover picture shows the type of product and may not necessarily be an exact image of the model
covered by the manual.
2

599468
Fisher & Paykel Appliances
5900 Skylab Road
Huntington Beach
CA 92647
Telephone: [phone]
COPYRIGHT ©FISHER & PAYKEL LTD 2007 - ALL RIGHTS RESERVED
3
PRODUCTS
Brand Fisher & Paykel
Model Description Product Code Market
OB24SDPX1 Designer, electronic clock, pyrolytic 88487-A US

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CONTENTS
1SPECIFICATIONS...................................................................................................................5
1.1 Model Descriptions..........................................................................................................5
1.2 Electrical Ratings ............................................................................................................5
2SERIAL LABEL.......................................................................................................................6
3INSTALLATION.......................................................................................................................7
3.1 Cabinetry.........................................................................................................................7
3.2 Securing The Oven.........................................................................................................7
3.3 Air Circulation..................................................................................................................7
4OPERATION............................................................................................................................8
4.1 Setting The Clock............................................................................................................8
4.2 Conditioning The Oven ...................................................................................................8
4.3 Protecting The Enamel Surface......................................................................................8
4.4 Condensation And Hot Knobs.........................................................................................8
4.5 Cleaning..........................................................................................................................8
4.5.1 Door Glass...............................................................................................................8
4.5.2 Enamel Surfaces......................................................................................................9
4.6 Replacing The Oven Lamp .............................................................................................9
4.7 Setting oF/oC On The Display..........................................................................................9
5SERVICING............................................................................................................................10
5.1 Pyrolytic Ovens.............................................................................................................10
5.1.1 Electronic Programmer ..........................................................................................10
5.1.1.1 Operating Principles........................................................................................10
5.1.1.2 Electronic Programmer Testing.......................................................................12
5.1.1.3 Wiring Diagram (Old Version Programmer) ....................................................15
5.1.1.4 Wiring Diagram (New Version Programmer)...................................................16
5.1.2 Door Lock Mechanism ...........................................................................................17
5.1.2.1 Principles of Operation....................................................................................17
5.1.2.2 Door Lock Related Issues...............................................................................19
5.1.2.3 Door Latch Adjustments..................................................................................19
5.1.2.4 Door Lock Clearance Adjustment ...................................................................21
5.1.2.5 Door Lock Status Wiring Diagrams.................................................................22
5.2 Wiring Diagram .............................................................................................................27
6FAULT CODES......................................................................................................................28
6.1 Electronic Oven Fault Codes ........................................................................................28
6.2 Pyrolytic Oven Fault Codes...........................................................................................30
7WARRANTY ..........................................................................................................................32

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1 SPECIFICATIONS
1.1 Model Descriptions
Type OB = Oven - Built in
Width 24 = 24 in
Cavity B = Double cavity
H = Double under bench oven
N = Compact oven
S = Single cavity
Family C = Classic
D = Designer
L = Commercial
V = Exclusive
Features E = Electronic clock
F = Large font graphics on control panel for visually impaired customers
M = Electronic minute timer
P = Pyrolytic
T = Electronic (soft touch) controller
Colour M = Iridium
W = White
X = Brushed stainless
Series 1 = 1st iteration
1.2 Electrical Ratings
AC 120/240V, 60 Hz
Pyrolytic model
OB24SDPX1 3095 W, 12.9 A

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2 SERIAL LABEL
• Ser n0= serial number, composed of ABBCC-NNNN , where:
- A is the last number of the year of manufacture e.g. 7 = 2007.
- BB is the week of manufacture e.g. 08 = week 08.
- CC – ignore this.
- NNNN is the progressive product number.
• Part Nr. = product code.
- Future service version changes will be indicated with a change of letter after the product
code, e.g. 88487-B.
• Location:

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3 INSTALLATION
3.1 Cabinetry
There is no requirement to install the product in an air-sealed cavity.
3.2 Securing The Oven
Secure the oven into the cabinetry using the screws provided.
3.3 Air Circulation
The space between the bottom of the door and the lower trim is important for the correct air
circulation into the oven. Ensure the lower trim is not damaged. The feet may be removed but the
product must not rest on the lower trim.

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4 OPERATION
4.1 Setting The Clock
The oven will not work if the clock has not been set. Refer to the user guide for instructions on
how to set the clock.
4.2 Conditioning The Oven
Condition the oven before using it for the first time.
- Slide in the shelves and grill pan.
- Heat the oven to maximum on the following functions (where available) for;
- 60 min on the bake function
- 30 min on the fan forced function
- 15 min on the fan grill function
- 15 minutes on the grill function
4.3 Protecting The Enamel Surface
Ensure that aluminium foil, dishes, trays, water or ice are not placed on the oven floor as this will
irreversibly damage the enamel.
4.4 Condensation And Hot Knobs
The oven fan comes on automatically at different stages of the cooking cycle. Hot air can blow
from under the control panel as part of the oven’s cooling system, (and this can result in knobs
becoming hot). When the oven is turned off, the cooling fan may stay on until the oven cools
down.
Condensation is a normal byproduct of cooking, and can be kept to a minimum by covering food
while it is cooking.
4.5 Cleaning
4.5.1 Door Glass
Do not use harsh abrasive cleaners or sharp metal scrapers to clean the oven door glass as this
may scratch the surface and result in the glass shattering, or damage the heat reflective coating.
The pyrolytic models have four panes of glass, but these cannot be removed for cleaning.
Take care not to damage the rubber spacers when replacing the inner door glass.
Ensure the inner door top gasket is re-fitted the correct way up.

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4.5.2 Enamel Surfaces
Avoid leaving alkaline or acidic substances (such as lemon juice or vinegar) on the oven surfaces.
Do not use cleaning products with a chlorine or acidic base.
4.6 Replacing The Oven Lamp
Never use screwdrivers or other utensils to remove the cover as this could damage the enamel,
the cover or the lampholder. Hands only must be used. For details of the wattage of the oven
lamp, refer to the appropriate parts manual.
4.7 Setting
oF/oC On The Display
• Turn the oven selector knob to a cooking function.
• Press button 5 on the programmer to reduce the displayed temperature until the minimum
value is reached (120oF/50oC).
• With oFor oCflashing on the display, press button 5 again (if oFor oCis not flashing, press
button 4 before pressing button 5) until OFF appears on the display.
• Press button 4 for about 3 to 5 seconds until the display changes from oCto oFor vice
versa. During selection, oCor oFis flashing.
• When OFF appears again on the display, turn the selector knob to 0 (OFF) position. The
selection to oC or oF has been completed.

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5 SERVICING
5.1 Pyrolytic Ovens
5.1.1 Electronic Programmer
Old Version New Version
EL1000
The Siebe®electronic Programmer is the primary control and monitor device and incorporates the
following features:
• Oven temperature control.
• LED display.
• Clock 24 Hour.
• Minute minder & automatic baking function.
• Self clean function with door lock/unlock input.
• Baking mode selection.
• EEPROM unit to store and back up electronic data.
• Single handed operation.
• 0F indication.
• Temperature probe input.
5.1.1.1 Operating Principles
The programmer is designed to detect various input control signals from the following:
• Oven temperature probe ST1
• Variable Temperature Control ST2
• Door status microswitch ST3
• Oven mode selector switch ST4
and outputs these signals to the following relays and triac, supplying power to the various cooking
circuits:
• Thermostat Relay 1
• Oven Fan Relay 2
• Lock/Unlock Relay 3
• Cooling Fan Relay 4 (New version programmer)
• Cooling Fan Triac 1 (Old version programmer)
Supplied with mains 240 volts, the onboard transformer reduces the working voltage of the
programmer to 15 volts AC.

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Connected to the mode selector (ST4), the electronic programmer (EL1000) verifies the
programme selection by comparing the resistance on the selector with that stored on the
programmer’s microchip.
When the selected programme has been chosen, a confirmation will be given on the onboard LED
display as follows:
• Off Time of Day
• Oven light Time of Day
• Defrost frozen foods dEF
• Convection cooking with ventilation 3200F
• Traditional convection cooking 3500F
• Ventilated cooking with double grill 4800F
• Grilling 4800F
• Ventilated grilling 4800F
• Self cleaning function P0.00
If the door is open when the mode selector is operated, “door” symbol will appear and an audible
warning will sound for 30 seconds with the “door” symbol flashing.
Normal Baking & Grilling Function
When a baking or grilling function is selected and the customer verifies the temperature, the
following will be triggered by the Electronic Programmer (EL1000):
• Set Temperature displayed on LCD (min 1220F - max 4820F).
• Internal cavity temperature confirmed by ST1 probe.
• Thermostat relay 1 operated and the thermostat contacts closed.
• Door status confirmed by ST3 microswitch.
• Cooling fan triggered by Triac 1 (old version programmer) or relay 4 (new version
programmer).
• Oven fan relay 2 operated.
Power is now supplied via the safety thermal overload to the various switch terminal configurations
on the mode selector and on to the various elements.
The internal cavity temperature is now constantly monitored by the ST1 probe and will trigger the
making and breaking of the thermostat relay 1 to ensure correct temperature control. The oven
thermostat light will also illuminate to indicate power to the elements.
Triac 1 (old version programmer) or relay 4 (new version programmer) maintains cooling fan
operation until the selector switch is turned to the “Off” ,”Light” or “Defrost” position and the inside
oven cavity drops below 2120F.
Note: Full user set up details for the normal baking and grilling functions can be found in the User
Operating Instructions.

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Self-Clean (Pyrolytic) Function
When the self-clean function is selected on the mode selector, the Electronic Programmer
(EL1000) will trigger the following.
• Internal cavity temperature confirmed by ST1 probe.
• Door closed status confirmed by ST3 microswitch and door lock light is illuminated.
• P0-00 displayed on LCD.
• P1-30 displayed on PCB after key 3 verification (Max P3-00 available).
• Door lock / unlock relay 3 operated (term 3 – 4) locking oven door latch (<30 seconds).
• Cooling fan triggered by Triac 1 (old version programmer) or relay 4 (new version
programmer).
• Thermostat relay 1 operated and thermostat contacts closed.
• Time to run verified on PCB: P3-00, P2-30, etc.
• P0-00 and auto symbol flash at end of cycle.
• Door lock neon illuminated within 30 seconds of relay 3 operation.
Power is now supplied via the safety thermal overload to the various switch terminal configurations
on the mode selector and on to the grill element and external bottom oven element.
The oven cavity is heated up to the maximum self-clean temperature of 9140F and is controlled by
the ST1 probe and thermostat relay 1.
The oven door will be remained locked until the self-clean cycle has finished and the cavity
temperature has dropped to below 5630F. Above this temperature, the display will show “DoLo”.
Triac 1 (old version programmer) or relay 4 (new version programmer) maintains the cooling fan
operation until the selector switch is turned to the “Off” ,”Light” or “Defrost” position and the inside
oven cavity drops below 2120F.
Note: Full user set up details and customer message readings for the normal self-clean function
can be found in the User Operating Instructions.
5.1.1.2 Electronic Programmer Testing
Quick Test
A simple test to verify the correct sequence of programmes are being registered by the PCB is to
turn the selector switch through all settings and compare the digital readout with the following:
Setting Programme Display Readout
0 Off Time of Day (hh:mm)
1 Lamp Time of Day (hh:mm)
2 Defrost dEF
3 Convection Bake Oven Ambient Temperature
4 Bake Oven Ambient Temperature
5 Double Grill Oven Ambient Temperature
6 Grill Oven Ambient Temperature
7 Fan Grill Oven Ambient Temperature
8 Self-Clean P1-30 (Ph:mm)
By referring to the test procedure for the control switch, it is possible to make further checks to
verify the resistance being read by the electronic programmer from the control switch, however the
above chart should be sufficient in most cases.

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Full Engineer Test Mode
This special mode is for testing single components of the control board. It can only be activated
within 10 seconds of the power being supplied and as soon as the cavity temperature has been
evaluated.
If the cavity temperature is higher than the door locking temperature, the door gets locked and the
test mode cannot be entered.
To enter test mode, turn on the appliance and within 10 seconds, turn the mode selector switch to
the ‘Self-Clean’ position and press timer buttons 5 and 6 together.
The display reads ”tE” for test mode.
To exit test mode and return to power on mode, press timer buttons 5 and 6 again. If no button is
pressed within 25 seconds, the test mode is automatically abandoned and the control returns to
power on mode.
The test mode is performed in 3 levels:
Level 0 Outputs, button and function test. Also program information.
Level 1 Inputs test
Level 2 Analogue (AD) values test **
When entering the test mode, the default level is level 0. To change the level, keep timer buttons
2 and 3 pressed.
The display reads "tE °x" while the degree sign flashes. Pressing the PLUS/MINUS key will set the
actual test level 0, 1, or 2.
**Test level 2 is not mentioned in this section as it is only applicable to the internal software
configuration and is not considered relevant to general service and repair work.
Level 0
This test is performed pressing the timer buttons as follows:
Button 1 Display and Buzzer test.(Each press of the button moves to the next step.)
Step 1 All segments and symbols are illuminated and the buzzer sounds.
Step 2 All odd segments (A, C, E, G) and symbols (Bell, Pot, AUTO) are illuminated.
Step 3 All even segments (B, D, F) and symbols (P, AUTO), Dot, Celsius-Symbol) are
illuminated.
Button 2 Relay 1 (Thermostat) function test.
Display message ”tE E1” (listen for click of relay to confirm operation).
Button 3 Relay 2 (Main Oven Fan) function test.
Display message ”tE E2” (Listen for click of relay and observe main oven fan operation).
Button 4 Same as key 1
Button 5 Relay 3 (Lock / Unlock Relay) function test.
Display message ”tE E3” (Listen for click of relay and look at lock neon to confirm operation).
Button 6 Relay 4 / Triac 1 (Cooling Fan) function test.
Display message ”tE E4” (observe cooling fan operation).
Button 1 & 3 Program number (30-xxxx).
Display message ”1009”/”1082” for 50/60Hz version.
Button 1 & 5 Oven type.
i.e. valid oven temperature offset table A or B. Displays message "a" or "b".

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Level 1
Button 1 Oven sensor temperature.
Display message "xxx°F"
Button 2 Baking mode 0 to 8.
Display message "b1” to “B8” corresponding with chosen selector switch position.
Button 3 PV +/- position.
Display message “Pr xx”. xx is 0 = Neutral, 1 = plus, -1 = minus.
Button 4 Same as key 1.
Button 5 Door position.
Display message 0d = door closed, 1d = door open.
Button 6 Cavity temperature.
Display message "xxx°F"
Note: Some of the above key operations have been deleted as they are only applicable to the
internal software configuration and are not considered relevant to general service and repair work.
The PCB on the electronic programmer has been programmed via the EEPROM (electrically
erasable programmable read-only memory) and has been configured to work for various
applications.
The Electronic Programmer for the EU/Australain market has been configured for use with or
without spit motor. For those models not using a spit motor, the unit has been set up as table “b”
and will reflect different internal sensor settings from that of table “a”.
The correct table identifier can be seen as the first digit when the appliance is switched on and
should be verified for correct usage and setting if either the Electronic Programmer has been
replaced or the customer has complained of poor cooking performance.
To change over from Table “a” to table “b”, the following procedure should be carried out:
• Turn the power off and on.
• Turn the selector button to the self-clean position and press button 6.
• Then, within one second, press button 2 and then button 1.
• Select Table “a” by pressing the minus button.
• Select Table “b” by pressing the plus button.
• Confirm the selection by pressing buttons 2 and 3 together.
Note: The table selection should only be changed if it is incorrect for the appliance being used.
An incorrect setting may effect the cooking results.
The test procedures in this section should only be carried out by qualified service
technicians with applicable product knowledge and an understanding of the appliance
related components.
The testing of the internal circuitry and components on the programme board is not
recommended.

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5.1.1.3 Wiring Diagram (Old Version Programmer)

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5.1.1.4 Wiring Diagram (New Version Programmer)

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5.1.2 Door Lock Mechanism
The door lock mechanism is a bimetal operated door looking system that is used to ensure the
oven door is mechanically locked and cannot be opened while the oven is in the self clean mode.
5.1.2.1 Principles of Operation
When the oven is switched to the self-clean mode, the main control board on the oven will verify
via the door lock microswitch (figure 1), that the door is closed.
Figure 1
Satisfied that the door is closed, a voltage will be supplied by the PCB via contacts 3 and 4 to a
small PTC heating device mounted on the door lock (figure 2). This will heat up and cause the
bimetallic contact arm to mechanically push the latch mechanism into the lock position and close
the oven door latch switch (contacts 33 and 34) and lock the door latch in the closed position.

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Figure 2
The door lock mechanism will be locked approximately 30 seconds after the self-clean programme
has been selected and will be indicated by the illumination of the “lock” neon mounted on the
control panel.
If, after selecting the self-clean function, the door is not closed or the PCB cannot verify a closed
position via the door lock microswitch, the PCB display will flash “DOOR” and the self-clean
function will not operate. If, after 5 minutes, the door has not been closed, an audible signal will be
heard for approximately 30 seconds.
The door will remain locked for the duration of the self-clean period and will not unlock until the
oven cavity temperature has dropped to below 5720F.
Should the power supply to the appliance be disrupted, the door will remain mechanically locked.
Note: Refer to the user operating instructions for full self-cleaning functions and operations.
Unlock Lock
Bimetallic contact
arm.
Terminals 2 & 3
Microswitch
Bimetallic
contact arm.
Terminals 3 & 4.
PTC element
(lock)
Oven door latch
switch.
Terminals 33 & 34.
PTC element
(unlock)

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5.1.2.2 Door Lock Related Issues
The customer may not be initially aware of a failure of the door lock mechanism and the first
indication the customer will have is when the control display shows the flashing “DOOR” symbol or
an audible sound can be heard.
Under normal circumstances, the door lock is very reliable and has a life cycle of many thousands
of operations. However, customer misuse or incorrect assembly after service could give rise to
problems.
If the door is shut with great force, or the customer tries to open the door when it is locked closed,
it may in some circumstances be possible to break the door latch. To ensure that the oven will not
work in the self-clean” mode if the door is forced open, the door latch is designed in such a way
that the latch body will break at a defined break point before the latch head (figure 3).
Figure 3
The breaking of the latch body will ensure that the microwswitch will register a door open condition
and disable the self-clean” mode, instead of breaking the latch head and allowing the door to be
opened.
5.1.2.3 Door Latch Adjustments
Although no adjustment to the internal mechanism of the door lock is required, adjustment and
positioning of the whole assembly after the unit has been removed or tested is critical for its correct
functioning.
The following tests and adjustments should be made whenever a door lock mechanism is removed
or replaced.
5.1.2.3.1 Door Locking Adjustment
When removing the door lock mechanism, it is important to ensure that the shim washers are
retained and correctly positioned as shown (Figure 4).
Figure 4
Break Point
Latch Head
Latch Body
Shim Washer

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The door lock mechanism should be positioned through the control panel as shown (Figure 5)
ensuring that the shim washers are correctly located (Figure 4).
Figure 5
The securing screws for the door lock assembly should only be screwed in enough to allow the
the lock assembly to still be moved.
With the door closed, the latch operation should be observed from the front of the appliance to
ensure that the latch can be manually pushed into the closed position and can be seen to be
locking the door shut.
With the latch being held in the down position, the door lock mechanism should then be manualy
tested by pushing over the lock mechanism with a screwdriver (figure 6). The lock mechanism
should be free to lock and unlock without any undue strain. If the lock mechanism cannot be
moved freely, the door lock assembly should be moved slightly and retested as above. The door
lock screws should then be fully tightened.
Figure 6