Fisher & Paykel OB76DD Service Manual
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Fisher & Paykel OB76DD Service Manual

Fisher & Paykel OB76DD Service Manual

Oven
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WALL OVEN
OB76DD and OB76SD
V models
SERVICE MANUAL
NZ AU

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Summary of Contents for Fisher & Paykel OB76DD

  • Page 1 WALL OVEN OB76DD and OB76SD V models SERVICE MANUAL NZ AU...
  • Page 2 FEATURED PRODUCT & CONTACT ADDRESSES Model Description CA New logo Market 80887 81488 OB76SDEPX3 Single oven, designer, pyrolytic self clean, stainless steel. 80971 81824 80888 81489 OB76DDEPX3 Single oven, designer, pyrolytic self clean, stainless steel 81825 80972 Fisher & Paykel Appliances Ltd Fisher &...

  • Page 3: Table Of Contents

    CONTENTS HEALTY AND SAFETY SPECIFICATIONS Oven Weights & Cavity Dimensions Electrical Specifications Product Dimensions MODEL/SERIAL NUMBER LOCATION & IDENTIFICATION Data Label and Location TECHNICAL OVERVIEW Oven Cavity Fan Cooling Fan Active Vent Fan Outer Grill Element Inner Grill Element Bake Element Fan Element Temperature Sensor Halogen Bulbs...
  • Page 4 CONTENTS 4.23 Pyrolytic Self Clean 4.24 Oven Mode Elements and Fan Profiles OPERATION Control Panels Clock Setting the Clock To Change the Time Oven Functions User Preference Settings Sabbath Mode DIAGNOSTICS Entering the Technician Mode Technician Mode Navigation FAULT DIAGNOSTICS User Alert Codes Failure Alerts Symptom: oven under cooking...
  • Page 5 CONTENTS SERVICING THE COMPONENTS Removal from the Joinery Removal of the Door Disassembly of the Door Remove the Door (New hinge style) Removal of the control panel Dissassembly of the Control Panel Removal of the Power Module Removal of the Power Transformer Removal of a Thermal Limiter 8.10 Removal of the fan Shroud...

  • Page 6: Healty And Safety

    1 HEALTH & SAFETY IMPORTANT ! PLEASE RETAIN THIS MANUAL FOR FUTURE REFERENCE. Note: When servicing the walloven, Health and Safety issues must be considered at all times. Specific safety issues are listed below with their appropriate icon. These are illustrated throughout the service information to remind service people of the Health and Safety issues.

  • Page 7: Specifications

    2 SPECIFICATIONS 2.1 Oven Weights & Cavity Dimensions OB76SD weight: 86kg OB76DD weight: 154kg Internal Cavity dimensions : 402mm H x 604mm W x 400mm D 2.2 Electrical Specifications MODEL VOLTAGE FREQUENCY MAX POWER OB76SD 220/240 50Hz 4.7kw OB76DD 220/240 50Hz 8.5kw...
  • Page 8 2 SPECIFICATIONS FRONT SIDE Product dimensions (mm) overall height of product overall width of product overall depth of product (excluding handle and dials) height of chassis width of chassis depth of chassis depth of oven frame and control panel 16-20 mm (=distance between front of chassis and front of oven door, excl.

  • Page 9: Model/Serial Number Location & Identification

    3 MODEL / SERIAL NUMBER LOCATION & IDENTIFICATION 3.1 Data Label and Location The product data plate is located on the left hand side behind the grill, between the control panel and the oven door (top oven on double models). The data label contains information specific to that model, like product code number, model number and serial number.
  • Page 10 The serial number consists of three letters and six digits and contains the information shown in the following example: 123456 Sequential serial number Manufacturing plant code FISHERPAYKUL code indicating month of manufacture CUMBERLAND code indicating year of manufacture Cumberland code Letter Year Fisherpaykul code...

  • Page 11: Technical Overview

    4 TECHNICAL OVERVIEW 4.1 Oven Cavity Fan The oven cavity fan will turn on eight seconds after the mode is selected. The fan should always operate when the fan element is on. Operational Modes: Fan Forced Fan Bake Fan Grill Roast (first 20 minutes only) Warm Bake (pre-heat assistance only)

  • Page 12: Active Vent Fan

    4.3 Active Vent Fan The vent fan will operate for the first thirteen minutes of all oven modes except Bake (does not operate) and in Self-Clean Cycle, Grill modes (runs continuously). Voltage: 220/240 VAC Wattage: 18 watt Frequency: 50/60 HZ 4.4 Outer Grill Element The outer grill element will turn on eight seconds after a mode is selected.

  • Page 13: Fan Element

    4.7 Fan Element The fan element and oven fan will turn on eight seconds after the mode is selected. Operational Modes: Fan Forced Bake (pre-heat assistance only) Fan Bake Pastry Bake (pre-heat assistance only) Voltage: 220/240 VAC Wattage: 2500 watt 4.8 Temperature Sensor Voltage: 5 VDC...

  • Page 14: Halogen Bulbs

    4.9 Halogen Bulbs The oven cavity lights will come on when the door is opened or when an oven mode is selected. The lights will turn off when the door is closed (if no oven mode is selected) or if the programmed oven cook time has finished.

  • Page 15: Function Module

    4.12 Function Module The OB76 models use a function module as a customer interface, and shows the cooking function selected by illuminating the icon on the control panel. The module uses a harness to communicate with the clock module, and has an encoder for the customer to select the oven function.

  • Page 16: Power Transformer

    4.15 Power Transformer Voltage: 12v/240 50hz 4.16 Thermal Limiter If a thermal limiter has tripped there will be no continuity across its contacts. Double ovens have 2 thermal limiters , one on the upper cavity and one on the lower cavity. Single ovens have one thermal limiter.

  • Page 17: Meat Probe And Socket

    4.17 Meat Probe and Socket Voltage: 5 VDC To test the meat probe: Using a multimeter, check between these 2 points, should read 60K ohms when cold While checking the resistance, heat the end of the meat probe, the resistance will decrease as the temperature goes up.

  • Page 18: Cooling Fan Resistor

    4.18 Cooling Fan Resistor Power Rating: 50 watt Resistance: 220 Ohms Max Ambient Temp: 85 ºC 4.19 Isolation Relay The isolation relay is now part of the main power board. 4.20 XY Capacitor This capacitor provides surge protection for the oven.

  • Page 19: Pyrolytic Self Clean

    4.23 Pyrolytic Self Clean Duration: 4 or 5hr option Pyro Temp: 440 ºC Heat-up time: 55 minutes approx. Holding time: 145/205 minutes approx Cool-down time: 40 minutes If a Self-Clean Cycle will not start, check that there are no meat probes inserted and that the control knobs of the cavity that is not being cleaned (in a double oven) are in the ‘OFF’...

  • Page 20: Oven Mode Elements And Fan Profiles

    4.24 Oven Mode Elements and Fan Profiles Stage Oven Cooling Lights Vent Grill Grill Bake Fan 18W Outer Inner Element Element Element 2500W 1500W 2900W Bake preheat Cook X(67%) preheat Bake Cook X (67%) preheat Forced Cook Grill Cook Maxi Cook Grill Cook...

  • Page 21: Operation

    5 OPERATION 5.1 Control Panels Double Model Single Model 5.2 Clock The clock has 4 user interface buttons.

  • Page 22: Setting The Clock

    5.3 Setting the Clock 1.Power the oven on at the wall, the clock will start to flash 24 hr 2.Press the right scroll > button on the clock to change between 24 Hr and 12 Hr, then press the tick button to confirm.

  • Page 23: To Change The Time

    5.4 To Change the Time 1. Press and hold the left and right scroll < > buttons together for 3 seconds to enter the user preference menu. The display will either show 12 Hr or 24Hr 2. Press the tick button to confirm. The display will flash.

  • Page 24: Oven Functions

    5.5 Oven Functions Bake upper outer and lower elements Heat comes from both the upper and lower elements. The fan is not used in this function. Ideal for cakes and foods that require baking for a long time or at low temperatures. This function is not suitable for multi-shelf cooking.
  • Page 25 Fan Forced fan and rear element By using the central rear heating element and fan, hot air is blown into the cavity, providing a consistent temperature at all levels, making it perfect for multi-shelf cooking. Trays of cookies cooked on different shelves are crisp on the outside and chewy in the middle. Meat and poultry are deliciously browned and sizzling while remaining juicy and tender.
  • Page 26 Maxi Grill upper inner and outer elements Intense radiant heat is delivered from both top elements. There are 9 steps between ‘Lo’ and ‘Hi’ (100% power). Preheating is not essential although some people prefer to allow the element to heat for a few minutes before they place food under the grill.
  • Page 27 Pastry Bake fan plus lower element The fan circulates heat from the lower element throughout the oven. Excellent for cooking pizza as it crisps the base beautifully without overcooking the topping. Ideal for foods such as sweet and savoury pastry foods and delicate foods that require some top browning eg frittata, quiche.
  • Page 28 this is not a cooking function Provides a constant low heat of less than 90°C. Use to keep cooked food hot, or to warm plates and serving dishes. To Warm reheat food from cold, use another oven function to heat the food piping hot and only then change to Warm, as this function alone will not bring cold food up to a high enough temperature to kill any harmful bacteria.

  • Page 29: User Preference Settings

    5.6 User Preference Settings In the user preference setting, the oven can be changed to do the following: display the temperature in degrees Celsius or Fahrenheit give audio feedback (tones and beeps) or operate quietly display time as 12-hr or 24-hr operate with the display off have its lights on or off during cooking operate in Sabbath setting (see ‘Sabbath setting’...
  • Page 30 Press the right scroll button to scroll Press the select button to save the new through the options for that particular option . setting. Refer to the table below. For all options except ‘Display off’ : press the cancel button to quit the user preference menu.

  • Page 31: Sabbath Mode

    5.7 Sabbath Mode While your oven is in Sabbath setting The display, dial halos and indicators will be unlit, the buttons will be unresponsive. No tones or beeps will sound. No alert codes or temperature changes will be displayed. The oven lights will stay on. If you want the oven lights to be off during Sabbath setting, first select the ‘Lights off’...
  • Page 32 Press the select button to activate the Press the scroll buttons to set the time option. (hrs). You may set the time for up to 99 The display will flash hours. Double oven models only: Select the oven(s) you wish to use by pressing the UPPER or LOWER oven selector button Turn the function dial to Bake.

  • Page 33: Diagnostics

    6 DIAGNOSTICS 6.1 Entering the Technician Mode NOTE: The OB76 oven uses the GOEP Electronic Platform controller, which is a universal controller used in other OB models. Ensure the correct model ID is selected for the model you are working on. Also ensure you are selecting the correct cavity when testing the functional menu.
  • Page 34 6 DIAGNOSTICS Symbol Component Wattage (W) Upper Inner Element 2900 Upper Outer Element 1500 Lower Inner Element 1500 Lower Outer Element not used in OB76 Fan Element 2500 Cavity Fan Low Speed Cooling Fan High Speed Cooling Fan Rotisserie motor not used in OB76 Lights Upper vent actuator/vent fan...
  • Page 35 6 DIAGNOSTICS Menu 3: Software Version This menu will show the software version of the electronics, it will scroll through the User Interface (UI) and power board (Pb) software and will advise the following: ww.xx.yy.zz The individual identifiers describe: Safety version. Increments on approved changes to the safety critical software section. A change will result in a new checksum for the safety critical program code.

  • Page 36: Fault Diagnostics

    7 FAULT DIAGNOSTICS All errors of the Power Boards and the Clock Board are displayed using the seven segment digits on the Clock Board display. In the double models the upper cavity power board is the master board, the lower cavity power board is the slave board.

  • Page 37: User Alert Codes

    7.1 User Alert Codes Possible Cause What to Check The oven has overheated : • Power Board, Clock Board or cavity over-temperature. • Let the oven cool down, the alert should clear itself. The temperature around the power board is too hot. •...

  • Page 38: Failure Alerts

    7.2 Failure Alerts Clock Board Faults Error Description & Possible Solution Initialization error. No master power board found. • Check model ID is set correctly for the model you are working on, refer page 33. • Check harness connections to master power board. •...
  • Page 39 Power Board Faults 2 = Master Power Board (upper cavity) 3 = Slave Power Board ( lower cavity) Type Error Description & Possible Solution F2/3 Initialization error. No Clock Board found. • Check connection to Clock Board. • Replace Clock Board. Unknown Model ID.

  • Page 40: Symptom: Oven Under Cooking

    Type Error Description & Possible Solution F2/3 Crystal Oscillator fault. This can occur during baking with a lot of condensation. • Let the oven cool down and dry out. Then power the oven off and on. • If the problem persists, replace the Power Board. Critical software/hardware fault.

  • Page 41: Symptom: Baking Burns On The Top

    7.4 Symptom: Baking burns on top POSSIBLE CAUSES: • Incorrect oven use • Incorrect temperature scale used • Faulty temperature sensor • Faulty oven element • Faulty oven cavity fan • Faulty power module DIAGNOSIS: • Check that the oven is being operated correctly. •...

  • Page 42: Symptom: Oven Seems To Be Operating Normally But No Heat

    7.6 Symptom: Oven seems to be operating normally but not heating POSSIBLE CAUSES: • Faulty oven door switch or door not closed • Tripped thermal limiter • Faulty temperature sensor • Faulty oven element • Faulty power module DIAGNOSIS: • Check to see if the door switch is operating correctly •...

  • Page 43: Tracing Cavity Fan Faults

    7.9 Tracing Cooling Fan Faults PROCEDURE: If the cooling fan will not start Enter technician diagnostic mode to test the cooling fan operation. (refer section 6 on page 32) The cooling fan will operate at low speed in normal operation. When the cooling fan is •...

  • Page 44: Tracing Element Faults

    7.12 Tracing Element Faults PROCEDURE: If the element does not turn off (element run-away) Note: In normal operation the element will cycle (turn on & off) when the cavity temperature has reached the set point. This can be detected by listening for the switching noise of the element relay switch on the power module or using a current meter.

  • Page 45: Tracing Limiter Faults

    7.14 Tracing Limiter Faults PROCEDURE: Check the thermal limiter(s) for continuity across the limiter contacts. Replace the faulty thermal limiter(s) with correct value (refer section 4.16). Trace the component that is most likely to have caused the thermal limiter to trip. To trace the likely cause of tripping Enter technician mode to help determine the likely faulty component.

  • Page 46: Servicing The Components

    8 SERVICING THE COMPONENTS WARNING! Ensure the product is isolated from the power supply before servicing. Follow the health and safety precautions while servicing. 8.1 Removal from the Joinery Ensure the product is isolated from the power supply. Remove the oven doors, shelves and utensils. Remove the two screws on either side of the oven frame that secure the oven to the joinery.
  • Page 47 Glass Pane Removal Remove the screws securing the top retaining bracket. (no. 1) Loosen the screws on the insulation retainer panel. (no. 3) Slide out the heat reflective glass pane. (no. 4) Remove the inner glass pane and gasket. Note: If transferring the gasket to a replacement glass pane then ensure the gasket join is located at the top of the door.

  • Page 48: Remove The Door (New Hinge Style)

    Hinge Removal (old style) Door Hinge Removal Remove the heat reflective glass pane. (refer p43) Remove the door hinge retaining screw near the top of the stanchion. Lift the door hinge and hinge stanchion enough to clear the edge of the door cap. Caution: The inner edges of the stainless steel door cap are sharp.
  • Page 49 To separate the inner and outer door & remove the hinge Remove the door from the oven. 2. Lay the door face down on a flat, clean working surface. 3. Remove the four hinge screws on the bottom of the door and the eight retaining screws down the sides of the door.

  • Page 50: Removal Of The Control Panel

    8.5 Removal of the Control Panel Ensure the product is isolated from the power supply. Open the oven doors and remove the two screws on either side of the oven frame securing the oven to the joinery. Slide the oven forward out of the joinery to gain access to the control panel screws, approx 200mm.

  • Page 51: Dissassembly Of The Control Panel

    8.6 Disassembly of the Control Panel The control panel is made up of a clock module, function module and a temperature module. There are differences between double and single models, so ensure you order the correct parts from the correct parts book for the model you are servicing. Clock Module Removal Remove the wiring harnesses from the clock module.

  • Page 52: Removal Of The Power Module

    Temperature Module Removal Remove the wiring harnesses from the temperature module. Remove the knob by pulling it off the encoder shaft, and then remove the bezel by turning it anti clockwise to release. We recommend the use of a pair of Clips long nose pliers With the bezel removed the encoder will now...

  • Page 53: Removal Of The Power Transformer

    8.8 Removal of a Power Transformer Remove the oven doors. This makes the product lighter and easier to move, and will stop it tipping forward when pulled out from the joinery. Remove the screws securing the product to the joinery and slide the oven forward out of the joinery approx 250mm.

  • Page 54: Removal Of The Fan Shroud

    8.10 Removal of the Fan Shroud Ensure the product is isolated from the power supply. Remove the oven door and shelves. Remove the two screws on either side at the top of the fan shroud. Pull the shroud up slightly to remove the lower tabs from the cavity liner.

  • Page 55: Removal Of The Fan Element

    8.12 Removal of the Fan Element Ensure the product is isolated from the power supply. Remove the oven doors and shelves. Remove the fan shroud, refer 8.9. Remove the 3 screws from the element and retaining bracket. The element tail will pull through far enough to remove the wiring.

  • Page 56: Removing The Lamp Assembly

    8.14 Removing the lamp assembly For rear lamp assemblies Ensure the product is isolated from the power supply. Remove the oven lamp cover as per section 8.12. Remove the the lamp body retaining screws and the lamp holder retaining screws. Disconnect the lamp assembly wires at the connectors in the back panel area.

  • Page 57: Removal Of The Grill Element

    8.15 Removal of the Grill Element Ensure the product is isolated from the power supply. Remove the oven doors and shelves. Remove the fan shroud, refer 8.9. Remove the 2 screws securing the element and the 2 screws on the support frame on the cavity roof.

  • Page 58: Removal Of The Cooling Fan

    8.17 Removal of the Cooling Fan Ensure the product is isolated from the power supply. Remove the product from the joinery, refer to section 8.1. Remove the rear panel to gain access to the cooling fan(s). screws Single models and double upper cavity Remove the wires from the cooling fan motor.

  • Page 59: Removal Of The Oven Cavity Fan

    8.19 Removal of the Oven Cavity Fan Ensure the product is isolated from the power supply. Remove the product from the joinery, refer to section 8.1. Remove the rear panel to gain access to the cavity fan. Removal Remove the fan shroud to gain access to the fan blade.

  • Page 60: Removal Of The Door Lock Assembly

    8.21 Removal of the Oven Door Lock Assembly The door lock is situated on the left hand side of link arm the product. If the door lock is engaged and the door cannot be opened, refer to the following procedure. Remove the oven from the joinery (refer to Section 8.1) Remove the front door lock inspection...

  • Page 61: Wiring Diagrams

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  • Page 70 FISHERPAYKEL.COM © Fisher & Paykel Appliances 2019. All rights reserved. The product specifications in this booklet apply to the specific products and models described at the date of issue. Under our policy of continuous product improvement, these specifications may change at any time. You should therefore check with your Dealer to ensure this booklet correctly describes the product currently available.

This manual is also suitable for:

Ob76sdOb76sdepx3Ob76ddepx3

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