GE 240, Technical Service Manual

Page 1: ...EED COOK CONV BAKE WARM COOK DEFROST OVEN LIGHT EXPRESS REHEAT START CLEAR LOCK UNLOCK HOLD 5 SECONDS BACK POWER HELP OPIONS FAVORITE RECIPES TIMER TURN TO SELECT PRESS TO ENTER OVEN DEMO LOCKED TURN DIAL REM MUTE TIMER OVEN MICROWAVE BROIL PROOF TEMP PAUSE OFF PSB2200NWW PSB2200NBB PSB2201NSS ZSC2200NWW ZSC2200NBB ZSC2201NSS ZSC2202NSS https appliancetechmanuals com ...

Page 2: ...sconnect power before servicing this product If electrical power is required for diagnosis or test purposes disconnect the power immediately after performing the necessary checks RECONNECT ALL GROUNDING DEVICES If grounding wires screws straps clips nuts or washers used to complete a path to ground are removed for service they must be returned to their original position and properly fastened GE Co...

Page 3: ...AR AND OTHER DAMAGE 4 DAMAGE TO OR LOOSENING OF HINGES AND LATCHES 5 EVIDENCE OF DROPPING OR ABUSE D BEFORE TURNING ON MICROWAVE POWER FOR ANY TEST OR INSPECTION WITHIN THE MICROWAVE GENERATING COMPARTMENTS CHECK THE MAGNETRON WAVE GUIDE OR TRANSMISSION LINE AND CAVITY FOR PROPER ALIGNMENT INTEGRITY AND CONNECTIONS E ANY DEFECTIVE OR MISADJUSTED COMPONENTS IN THE INTERLOCK MONITOR DOOR SEAL AND MI...

Page 4: ...sor 43 Installation 16 Introduction 6 Left and Right Door Switch Assemblies 44 Lower Heater Assembly 40 Low Voltage Transformer 29 Magnetron and Magnetron TCO 34 Microwave Leak Test 48 Noise Filter 31 Noise Filter Fuse 31 Nomenclature 5 Oven Removal Partial Removal 24 Proof Feature 14 Schematics and Wiring Diagrams 51 Sensor Keypanel Failure Detection 48 Service Test Mode 49 Speed Cook System 10 S...

Page 5: ...nual is located behind the small access panel on the right side of the oven Nomenclature Nomenclature The letter designating the year repeats every 12 years Example T 1974 T 1986 T 1998 Serial Number The first two characters of the serial number identify the month and year of manufacture Example AR123456S January 2008 A JAN 2008 R D FEB 2007 M F MAR 2006 L G APR 2005 H H MAY 2004 G L JUN 2003 F M J...

Page 6: ... perfect cooking results Warming Oven Keeps prepared foods warm and fresh and retains perfect moistness and crispness Proof Feature Specialized mode allows dough to rise quickly 16 in Turntable Removable metal and glass trays easily handle large casserole dishes Rounded Rear Wall Allows complete turntable rotation of 9 in x 13 in casserole dish for even cooking Installation Flexibility Fits either...

Page 7: ...ble when using microwave features Place food or microwave safe cookware directly on tray Upper Halogen Lamps Two 1200W halogen lamps cook food from above in speedcook broil and toast Window Allows cooking to be viewed while keeping microwaves confined in the oven Door Handle Pull to open the door Door Latches The door must be securely latched fo the oven to operate Lower Ceramic Heater One 500W ce...

Page 8: ...crowave Press this pad to reheat previously cooked foods a plate of leftovers or beverages FAVORITE RECIPES Press this pad to add edit change or remove a recipe from the memory TIMER Press this pad to set the minute timer Display Shows and instructs the use of all features on the oven SELECTOR DIAL Turn to select press to enter First turn then press the dial to make option food power level or temp...

Page 9: ...d while using the microwave similar to the interference caused by other small appliances It does not indicate a problem with the microwave Move the radio or TV as far away from the microwave as possible or check the position of the TV radio antenna O N I G O O C OV E N 9 5 8 V E N I S L A M O P T I M Z N I I G E O O K T I M C OV E N 9 5 5 Lights When the oven is on light may be visible around the ...

Page 10: ...er cooks food from below Rear Convection Heat Element A 1500 watt convection element operates when using convection bake The 1500 watt convection element is automatically added with certain foods Microwave A microwave boost is automatically added with certain foods The oven can also be used as a 950 watt microwave oven https appliancetechmanuals com ...

Page 11: ... humidity released during cooking senses when the food is done and shuts the oven off at the appropriate time Sensor cooking is not available for 5 minutes immediately following Speedcook Power Levels Advantium uses power from high intensity halogen lamps a ceramic heater microwave energy as well as convection heating to simultaneously cook foods evenly and quickly average of one fourth the time o...

Page 12: ... Level Temperature Operation 0 Room See Note 1 1 300 F See Note 2 2 310 F See Note 2 3 320 F See Note 2 4 330 F See Note 2 5 340 F See Note 2 6 350 F See Note 3 7 375 F See Note 3 8 400 F See Note 3 9 425 F See Note 3 10 450 F See Note 3 Notes Convection element not ON 1 Reaches temperature and then cycles at 2 temperature for remainder of programmed time Reaches temperature and then cycles at 350...

Page 13: ...is added to the recipe The amount of voltage compensation required is dependent upon the incoming voltage at the start of the cooking cycle and the particular Speedcooking selection that is chosen Voltage compensation occurs after approximately 5 seconds of cooking operation The display will show OPTIMIZING COOK TIME The time will flash and then display the new adjusted time based on the amount of ...

Page 14: ...Lower the thermistor temperature by placing a chilled or frozen item against the thermistor 5 Connect power and enter proof mode 6 Check for approximately 120 VAC 12 3 Amps at the convection heater Thermal Compensation Note Thermal compensation only occurs once and only when using a preprogrammed menu item in Speedcook These items require compensation for accurate and consistent cooking results Wh...

Page 15: ...n a demo cook mode the inner halogen light will come on for 4 seconds 2 The DEMO icon will be lit whenever the unit is in sales mode regardless of settings or the feature being selected The sales demo mode is cleared by holding the POWER TEMP and START pads down at same time for a full 3 seconds The sales mode can only be cleared during the same initial SELECT TIME display that occurs when the uni...

Page 16: ...e or circuit breaker Power should be supplied from a separate dedicated 30 ampere branch circuit Installation Wire size must conform to the requirements of the National Electrical Code or the prevailing local code Combined Speedcook and Wall Oven Installation When installed in combination with a GE Monogram single wall oven use separate electrical junction boxes Refer to single oven installation i...

Page 17: ...embly Convection Fan Assembly Turntable High Voltage Transformer Magnetron Capacitor Diode Damper Assembly Low Voltage Transformer Upper Heater Assembly Relay Board Power Board Top View Vent Motor UHH1 TCO UHH2 TCO Surge Filter Circulation Blower https appliancetechmanuals com ...

Page 18: ... 18 Lower Heater Assembly Turntable Motor Bottom View Continued Next Page Oven Cavity TCO Humidity Sensor Lower Heater Assembly Control Panel Assembly Left Side View https appliancetechmanuals com ...

Page 19: ...ight Side View Continued Next Page Surge Filter Control Panel Assembly Shown separated Control Board Relay Board Power Board Selector Board Upper Display Board Control Panel Low Voltage Transformer Control Panel Bracket Lower Display Board Circulation Blower https appliancetechmanuals com ...

Page 20: ...ard CN1 CN5 RY7 RY7 Inner Halogen Heater RY9 Outer Halogen Heater RY11 Ceramic Heater RY12 Convection Heater RY14 Magnetron CN3 CN9 CN8 CN7 CN21 RY9 RY11 RY12 RY14 CN6 CN20 CN101 CN1 Low Voltage Transformer 1 Primary Winding CN5 Primary Interlock Noise Filter Oven Lamp CN6 Circulation Motor Damper Motor Convection Motor Vent Motor Turntable Motor CN20 Control Board CN101 Power Board https applianc...

Page 21: ...anel CN15 Selector Board CN16 Lower Display Board CN20 Relay Board CN21 Power Board CN101 Not Used Continued next page CN14 CN101 CN15 CN16 CN20 CN21 Upper Display Board CN9 Connector to CN10 on Control Board Lower Display Board CN16 https appliancetechmanuals com ...

Page 22: ... 22 Control Panel CN14 to Control Board Selector Board Wire Harness to Control Board CN15 https appliancetechmanuals com ...

Page 23: ...oor Assembly Fuse Noise Filter Turntable Support Control Panel Assembly Low Voltage Transformer Cavity Light Left and Right Door Switch Assemblies Fuses Surge Filter S e r v i c e a b i l i t y U n i t R e m o v e d Capacitor and Diode Magnetron and Magnetron TCO High Voltage Transformer Noise Filter Damper Assembly Circulation Blower Assembly Upper Heater TCOs Upper Heater Assembly Humidity Senso...

Page 24: ...rims 3 Oven shown without accessory storage drawer Note In the following step the bottom trim is not used if the Advantium oven is installed with an accessory storage drawer 6 Remove the 3 brass screws from the bottom of the trim 7 Disengage the tabs on the trim from the bottom of the oven 8 Carefully remove the oven completely from the cabinet or wall opening 9 Disconnect oven wiring from junctio...

Page 25: ...eakage test must be performed any time a door is removed replaced or adjusted for any reason See Diagnostic and Service Information Door Removal Caution Do not close the door beyond the door removal position Damage to the inner door panel will occur To remove the door open the door fully and insert a door removal tool Part WB01X10364 in each door hinge opening The door can then be slowly closed a ...

Page 26: ...ed position 1 See Oven Removal Partial Removal Remove the 3 Phillips head screws from the top 2 front of the outer cover 3 Remove the 2 recessed Phillips head screws that attach the control panel assembly to the top of the frame 5 Open the oven door Grasp the bottom of the control panel assembly 6 and lift to release the 2 tabs that hold the bottom of the control panel assembly to the oven frame D...

Page 27: ...ach 4 the power board to the control panel bracket Lift the power board to clear the retaining tab 5 Tab CN3 CN101 CN21 Foam Tape To remove the relay board Remove the control panel See 1 Control Panel Assembly Disconnect the wire harness from the relay 2 board at locations CN1 CN20 and CN101 Remove the 5 Phillips head screws that attach 3 the relay board to the control panel bracket Lift the relay...

Page 28: ...ness connector from 2 the display board Disconnect the wire harnesses from the selector 3 board at locations CN10 CN14 CN15 CN16 CN20 and CN21 Remove the 4 Phillips head screws that hold the 4 control board to the control panel To remove the upper display board The upper display board is attached to the control panel by 2 Phillips head screws and positioned by 2 pins The wire harness located at CN...

Page 29: ...with proper operating voltages The low voltage transformer is held in place by 2 Phillips head screws The control panel must be removed to access the low voltage transformer See Control Panel Assembly The low voltage transformer is connected to the power board at location CN3 and on the relay board at location CN1 Resistance Check Disconnect the harness from the relay board at 1 location CN1 Check...

Page 30: ...hed to the oven with 2 Phillips head screws A single wire harness is connected to the oven lamp It is necessary to remove the outer cover to access the oven lamp See Oven Removal Partial Removal The oven cavity light will only come on when the door is opened Harness Light Removed From Housing Interior Light Housing Interior Note The oven lamp is a 12 VAC 20 watt lamp Part WB01X10239 To replace the...

Page 31: ...e filter for approximate resistance value at the following locations White neutral input to white blue neutral output 0 Ω Red line input to black line output 0 Ω White neutral input to red line input 23 Ω Top View of Noise Filter Wires Removed from Relays for Clarity Screw Ground Wire Screw Noise Filter Noise Filter Fuse Important Note The primary interlock monitor interlock door sensing secondary ...

Page 32: ...urge Filter The surge filter protects components of the oven against damaging electrical surges or power spikes such as lightning The surge filter is located on the right side of the oven behind the circulation motor assembly and to the right of the magnetron The surge filter is held in place by a single Phillips head screw The surge filter ground wire is attached to the oven chassis with a single Phi...

Page 33: ...voltage transformer See Oven Removal Partial Removal The high voltage transformer is located behind the top access cover The top access cover is held in place by 2 Phillips head screws The transformer is held in place with 4 Phillips head screws Two of the screws are recessed from the top of the outer cover Access holes are provided A magnetic screwdriver is necessary to capture these screws Capac...

Page 34: ...acitor is discharged before servicing See Capacitor and Diode Use electrician s discharge pliers and electrician s gloves under Kevlar gloves or equivalent protective gloves when discharging the capacitor Note The capacitor has an internal discharge resistor that automatically discharges the capacitor when the oven turns OFF Under normal operation the capacitor should fully discharge within 30 sec...

Page 35: ... damper assembly is held in place by 2 pins and 3 Phillips head screws that attach the damper assembly to the oven chassis When removing move the damper assembly inward to disengage the 2 pins from the vent tube Cooking Mode Damper Position Switch Plunger Position Switch Contacts Microwave Open Not Depressed Closed Speedcook Closed Depressed Open Damper Door Operating Modes Damper Door Switch The ...

Page 36: ...Peel back the foam seal from the circulation 3 blower bracket to expose the 2 wire guide slots Remove wiring from the guide slots in the 4 circulation blower bracket Circulation Blower Assembly Blower Motor Wires Wire Retainer Foam Seal Guide Slot Guide Slot 5 Remove the single Phillips head screw that attaches the filter ground wire to the oven chassis 6 Remove the 3 Phillips head screws from the ...

Page 37: ...ard and all oven functions will not operate including the display When replacing a TCO be sure to determine the cause of failure The convection heater TCO can be accessed by removing the rear cover The outer cover must be removed to access the upper heaters magnetron and oven TCOs See Oven Removal Partial Removal The upper heater TCOs are mounted on the heat shield above the upper heater assembly ...

Page 38: ...ing 1 and remove the outer cover See Oven Removal Partial Removal Disconnect the wires from the exhaust motor 2 Upper Heater Assembly Each halogen heater has an approximate resistance value of 1 8 to 3 7 Ω The outer heater is connected with 2 red wires and the inner heater is connected with 2 white wires To remove the upper heater assembly Remove the oven from cabinet or wall opening 1 and remove ...

Page 39: ...s and the heater shield from the heater assembly 9 Remove the 5 Phillips head screws and straighten the 4 folded lock tabs then lift off the heater cover Tab Tab Tab Tab 10 Carefully lift the heater assembly from the oven chassis Bottom View of Halogen Heater Assembly Wire Tie Inner Heater Outer Heater https appliancetechmanuals com ...

Page 40: ...to the oven Disconnect the bottom heater and turntable 4 wire harnesses Remove the 4 Phillips head screws and the 5 reflector from the oven chassis Remove the single Phillips head screw that 6 holds the heater assembly to the oven chassis Bottom View with Baseplate Removed Heater Screw Reflector Screws Wire Harness Caution To prevent damage to the heater and turntable wiring be sure wiring is place...

Page 41: ...eater Element The convection heater assembly is held in place by two 7 mm hex nuts and 4 Phillips head screws The convection heater element has an approximate resistance value of 6 to 12 Ω Two Phillips head screws connect the power wires to the element terminals The oven must be removed from the cabinet or wall opening to access the convection heater assembly See Oven Removal Partial Removal Therm...

Page 42: ...me Each convection power level setting directs the convection cooking system to operate within certain parameters as shown in the table below ELECTRICAL TERMINAL RELEASE LOCKING TAB The convection fan motor is held in place by 3 Phillips head screws The convection fan motor has an approximate resistance value of 31 Ω Convection Fan Motor The convection fan motor wire leads have locking tabs that m...

Page 43: ... See Control Panel Assembly The humidity sensor wire harness must be disconnected from CN8 on the power board On the humidity sensor wire harness check for approximate resistance values between Black Red 6 5 K Ω Red White 3 25 K Ω Black White 3 25 K Ω Turntable Motor The turntable rotates food for even cooking during all cook cycles The turntable motor is held in place with 2 Phillips head screws ...

Page 44: ...nted on plastic latch boards The latch boards are attached to the left and right side of the oven cavity The left side latch board contains the door sensing secondary interlock and halogen switches The right side latch board contains the primary interlock and monitor interlock switches LEFT LATCH BOARD RIGHT LATCH BOARD Halogen Heater Interlock Monitor Interlock Switch Door Sensing Secondary Inter...

Page 45: ...er leads from primary interlock and door sensing switches and RY14 relay WARNING Primary interlock door sensing switch monitor switch and relay board must be replaced when the 20 amp fuse is blown due to operation of monitor switch Note Perform microwave leakage test when replacing or adjusting interlock switches or latch board How to Adjust the Interlocks The latch board is adjustable for proper ...

Page 46: ...ws are recessed from the top of the outer cover Access holes are provided A magnetic screwdriver is necessary to capture these screws 5 Remove the 2 Phillips head screws that attach the latch board to the oven chassis 6 Remove the door switches from the latch board To replace the latch boards Place the oven in a partially removed position 1 See Oven Removal Partial Removal Open the oven door 2 Rem...

Page 47: ...HEAT AND MICROWAVE RESISTANT GLASS BOWL NOTE Convection Heater is turned on and off automatically by the temperature of inside of the cavity It does not cycle over time like the hologen lamps ceramic heater and microwave https appliancetechmanuals com ...

Page 48: ...Scrolls Upper Thermal Sensor OPEN SERVICE MAY BE NEEDED Upper Thermal Sensor SHORTED Humidity Sensor OPEN Abnormal High Temp Lower Thermal Sensor OPEN Lower Thermal Sensor SHORTED Turn ON for 5 minute test 4 Hold probe perpendicular to surface being 5 tested Scan surfaces at the rate of one inch per second Scan entire perimeter of door control panel viewing surface of door window and exhaust vents...

Page 49: ... make sure that all loads i e the halogen lamps and magnetron can be energized Note that all safety components remain active in the service mode To start the service diagnostics mode press the SPEED COOK pad and the KNOB for 3 seconds To exit the service diagnostics mode press the CLEAR OFF key Upon entering into Field Service Mode SERVICE MODE ON is displayed S E R V I E M C O E O N D The main co...

Page 50: ...15 seconds You will need to open the door to check for heat coming from the lower heater The control will turn on the turntable motor and 4 oven light for 5 seconds The control will turn on the damper motor for 15 5 seconds Make sure to listen for the operation of the damper motor This is the only way to confirm the operation The control will turn on the convection fan and 6 heater for 15 seconds Y...

Page 51: ...D CURRENT HVT RESISTANCE AND CURRENT Normal Approximately Abnormal Input current Upper Halogens 1 2 2 5 ohms Infinite 10 A Lower Ceramic 23 33 ohms Infinite or several 4 2 A Conv Sheath 6 12 ohms Infinite 12 5 A H V T 0 2 0 8 ohms Infinite 16 A ohm meter scale R 1 https appliancetechmanuals com ...

Page 52: ... 52 https appliancetechmanuals com ...

Page 53: ...me except that it is LIMITED because you must pay to ship the product to the service shop or for the service technician s travel costs to your home All warranty service will be provided by our Factory Service Centers or by our authorized Customer Care servicers during normal working hours Should your appliance need service during warranty period or beyond in the USA call 800 444 1845 In Canada 800...