SERVICE DATA SHEET 318047306 (0509) Rev. A Electric Double Wall Ovens with Electronic Oven Control NOTICE This service data sheet is intended for use by persons having electrical and mechanical training and a level of knowledge of these subjects generally considered acceptable in the appliance repair trade. The manufacturer cannot be responsible, nor assume any liability, for injury or damage of any kind arising from the use of this data sheet. SAFE SERVICING PRACTICES To avoid the possibility of personal injury and/or property damage, it is important that safe servicing practices be observed. The following are some, but not all, examples of safe practices. 1. Do not attempt a product repair if you have any doubts as to your ability to complete it in a safe and satisfactory manner. 2. Before servicing or moving an appliance, remove power cord from electric outlet, trip circuit breaker to Off, or remove fuse. 3. Never interfere with the proper installation of any safety device. 4. USE ONLY REPLACEMENT PARTS SPECIFIED FOR THIS APPLIANCE. SUBSTITUTIONS MAY DEFEAT COMPLIANCE WITH SAFETY STANDARDS SET FOR HOME APPLIANCES. 5. GROUNDING: The standard color coding for safety ground wires is GREEN OR GREEN WITH YELLOW STRIPES. Ground leads are not to be used as current carrying conductors. IT IS EXTREMELY IMPORTANT THAT THE SERVICE TECHNICIAN REESTABLISH ALL SAFETY GROUNDS PRIOR TO COMPLETION OF SERVICE. FAILURE TO DO SO WILL CREATE A POTENTIAL HAZARD. 6. Prior to returning the product to service, ensure that: · All electric connections are correct and secure. · All electrical leads are properly dressed and secured away from sharp edges, high-temperature components, and moving parts. · All uninsulated electrical terminals, connectors, heaters, etc. are adequately spaced away from all metal parts and panels. · All safety grounds (both internal and external) are correctly and securely reassembled. · All panels are properly and securely reassembled. 1 ELECTRONIC OVEN CONTROL (EOC) 1. The EOC offers Bake, Broil, Preheat (some models), Speed Bake (some models), Convection Bake (some models) and Convection Roasting (some models) modes, Timed and Delayed Baking, and Cleaning functions. 2. Convection operates with an element and a fan dedicated to convection (some models). 3. Speed Bake operates with a fan dedicated to speed bake mode (some models). 4. This EOC has a touch sensitive membrane. 5. The EOC includes a display board and a relay board. NOTE: The EOC is not field repairable. Only temperature settings can be changed. See oven calibration. NOTE: Appearance may vary depending on model. Up p e r O v e n UPPER OVEN Lower Oven Even-Cook Convection Ovens LOWER OVEN Conv bake Pre heat Speed clean Bake time Oven light UPPER ROAST WARM BAKE CONV BROIL Conv bake UPPER TIMER REMOVE LOWER DOOR RACKS CLEAN CONV BROIL Pre heat Speed clean Bake time Oven light WARM BAKE DELAY LOWER ROAST LOCKED Conv convert Bake Clean Start time LOCKED DELAY TIMED TIMED Conv convert Bake Clean Start time 1 Conv roast Broil Maxx clean Keep warm 2 7 3 8 4 9 5 0 Clock Timer On/Off START 6 Conv roast Broil Maxx clean Keep warm START Up p e r Ov e n Bake Speed bake Speed clean Bake time Clear /Off Controls UPPER OVEN LOWER OVEN UPPER ROAST WARM BAKE CONV BROIL Lower Oven UPPER TIMER REMOVE LOWER DOOR RACKS CLEAN CONV BROIL WARM BAKE DELAY LOWER ROAST LOCKED Bake Speed bake Speed clean Bake time Clear /Off Controls LOCKED DELAY TIMED TIMED Broil Keep warm Clean Start time START Oven light Clock Timer On/Off Oven light Broil Keep warm Clean Start time START Up p e r Ov e n Bake Clean Bake time Clear /Off Controls UPPER OVEN LOWER OVEN UPPER ROAST WARM BAKE CONV BROIL Lower Oven UPPER TIMER REMOVE LOWER DOOR RACKS CLEAN CONV BROIL WARM BAKE DELAY LOWER ROAST LOCKED Bake Clean Bake time Clear /Off Controls LOCKED DELAY TIMED TIMED Broil Keep warm Start time START Oven light Clock Timer On/Off Oven light Broil Keep warm Start time START Electronic oven control relay board Relay Board Legend: P1 Double line break, upper oven. P2 Double line break, lower oven. P3 L2 in, upper oven. P4 L2 in, lower oven. P5 L1, upper oven. P6 L1, lower oven. P7 Broil, upper oven. P9 Bake, upper oven. P13 Convection element, upper oven. P15 L2 in. P16 Convection element, lower oven. P17 Not used. P18 Not used. P19 Not used. J1 J2 J3 J4 AC power input (120V) DC power output to display board. AC power outputs (conv fan, motor door latch, light, cooling fan) for upper oven. AC power outputs (conv fan, motor door latch, light, cooling fan) for lower oven. P8 P6 P10 P12 P2 P4 P18 J4 J1 J7 J5 J6 J2 P5 P7 P9 P11 P3 P17 P1 J3 P13 P19 P15 P16 J5 J6 J7 Relays control inputs (bake & broil elements, light, convection fan, motor door latch, DLB) for upper oven. Relays control inputs (cooling fan, conv. element) for both ovens. Relays control inputs (bake & broil elements, light, convection fan, motor door latch, DLB) for lower oven. 2 ELECTRONIC OVEN CONTROL (continued) Electronic oven control display board J2 P1 P2 P6 J3 J4 J5 P10 P8 Keyboard connection. Micro programming (not used). DC power input. Relays control outputs (bake & broil elements, light, MDL, conv. fan, DLB) for upper oven. J4 Relays control outputs (cooling fan, conv element) for both ovens. J2 P1 P2 J3 J5 Relays control outputs (bake & broil elements, light, MDL, conv. fan, DLB) for lower oven. P6 Temperature probe inputs. P8 Door switch and MDL switch for upper oven. P10 Door switch and MDL switch for lower oven. OVEN ELEMENT - OPERATION Baking mode -First rise (Models with Bake element is on 45 seconds per minute. hidden bake element): Broil element is on 15 seconds per minute. Convection element and fan are on all the time. -First rise (Models without Bake element is on 40-50 seconds per minute. hidden Bake element): Broil element is on 10-20 seconds per minute. -Normal baking: Broiling mode Speed bake mode: -First rise: -Speed bake: Convection Bake -First rise: The EOC will cycle through the bake element, broil element and off time to maintain the set temperature. Broil element is on for 60 seconds per minute. Bake element is on 40 seconds per minute. Broil element is on 20 secondes per minute. The EOC will cycle through the bake element, broil element and off time to maintain the set temperature. Bake element is on 45 seconds per minute. Broil element is on 15 seconds per minute. Convection element is on all the time 3 elements (bake, broil, convection) will cycle. Bake element is on 30 seconds per minute. Broil element is on 30 seconds per minute. Convection element is on all the time. 3 elements (bake, broil, convection) will cycle. Bake element is on 40 seconds per minute. Broil element is on 20 secondes per minute. Bake element is on all the time. Bake element is on 50 seconds per minute. Broil element is on 10 secondes per minute. Bake element is on 40 seconds per minute. Broil element is on 20 seconds per minute. -Convection baking: Convection Roast -First rise: -Convection roast: Clean mode: -First rise: (Models without hidden bake element) -Clean: (Models with hidden -First rise bake element) -Clean: NOTE: Self-cleaning cycle cannot be started if the other oven is in operation, and you cannot operate the second oven if the other oven in on a self-cleaning cycle. 3 ELECTRONIC OVEN CONTROL (FAULT CODES) ELECTRONIC OVEN CONTROL (EOC) FAULT CODE DESCRIPTIONS Note: Generally speaking "F1X" implies a control failure, "F3X" an oven probe problem, and "F9X" a latch motor problem. Failure Code/Condition/Cause F10 Control has sensed a potential runaway oven condition. Control may have shorted relay, RTD sensor probe may have a gone bad. Suggested Corrective Action - Check RTD sensor probe and replace if necessary. If oven is overheating, disconnect power. If oven continues to overheat when power is reapplied, replace power/relay board and/or display board. Severe overheating may require the entire oven to be replaced, should damage be extensive. - Press Clear or Cancel key. - If fault returns, replace the keyboard (membrane). - If the problem persist, replace the display board. F11 Shorted Key: a key has been detected as pressed (for more than the debounce period) will be considered a shorted key alarm and will terminate all oven activity. Control's internal checksum may have become corrupted. F13 - Press Clear or Cancel key. - Disconnect power, wait 30 seconds ad reapply power. If fault returns upon power-up, replace display board. F14 Misconnected keyboard cable. - Disconnect power. Verify the flat cable connection between the keyboard membrane and the display board on J2. - If the connection is good but the problem persist, replace the keyboard (membrane switch). - If the problem persist, replace the display board. - Replace the display board. - Check wiring in probe circuit for possible open condition. - Check RTD resistance at room temperature (compare to probe resistance chart). If resistance does not match the chart, replace the RTD sensor probe. - Let the oven cool down and restart the function. - If the problem persist, replace the display board. F15 F30 Controller self check failed. Open RTD sensor probe/ wiring problem. Note: EOC may initially display an "F10", thinking a runaway condition exists. Shorted RTD sensor probe / wiring problem. F31 Note: F30 or F31 is displayed when oven is in active mode or an attempt to enter an active mode is made. F90 Door motor mechanism failure. - Press CLEAR key. - If CLEAR key does not eliminate problem, turn off power for 30 seconds, then turn on power. - Check wiring of Lock Motor, Lock Switch and Door Switch circuits. - Unplug the lock motor from the board and apply power (L1) directly to the Lock Motor. If the motor does not rotate, replace Lock Motor Assembly. - Check Lock Switch for proper operation (do they open and close, check with ohmmeter). The Lock Motor may be powered as in above step to open and close Lock Switch. If the Lock Switch is defective, replace Motor Lock Assembly. - If all above steps fail to correct situation, replace the display board or the relay board in the event of a motor that does not rotate. 4 RTD SCALE Temp. °F 32 ± 1.9 75 ± 2.5 250 ± 4.4 350 ± 5.4 450 ± 6.9 550 ± 8.2 650 ± 9.6 900 ± 13.6 Temp. °C 0.0 ± 1.1 23.9 ± 1.4 121.1 ± 2.4 176.7 ± 3.0 232.2 ± 3.8 287.8 ± 4.6 343.3 ± 5.3 482.2 ± 7.6 Resistance (ohms) 1000 ± 4.0 1091 ± 5.3 1453 ± 8.9 1654 ± 10.8 1852 ± 13.5 2047 ± 15.8 2237 ± 18.5 2697 ± 24.4 ELECTRICAL RATING 27" KW rating 240/208 Bake Element Wattage Broil Element Wattage Convection Element Wattage 7.5/5.6 Vary depending on model: 2300W/17820W or 2700W/2028W 3400W/2554W 30" 7.5/5.6 3400W/2554W 2750W/2065W Vary depending on model: Vary depending on model: No convection element No convection element or 350W/263W element or 350W/263W OVEN TEMPERATURE SENSOR UPPER OVEN CIRCUIT ANALYSIS MATRIX On Display Board On Relay Board On Relay Board Cooling Cooling DLB Conv.Fan Light Door Motor Fan High Lock Motor Switch Door Switch L2 out Fan Low J3-4 J3-5 J3-6 Bake Broil Conv. speed J3-7 speed J3-8 P1 P8-3 / P8-5 P8-1 & P8-5 P9 P7 P13 ELEMENTS Bake Speed Bake Broil Conv. Bake Conv. Roast Clean Locking Locked Unlocking Unlocked Light Door Open Door Closed X X X X X X X X X X X X* X* X X X X X X X X X NO NC NC NO X X X X X X X X X X X X X LOWER OVEN CIRCUIT ANALYSIS MATRIX On Display Board On Relay Board On Relay Board Conv.Fan Light Door Motor DLB Cooling Cooling Fan Lock Motor Switch Door Switch L2 out Fan Low High speed J4-5 J4-6 J4-7 Bake Broil Conv. P10-1 & P10-6 P10-3 / P10-6 speed J4-8 J4-9 P2 P10 P8 P16 ELEMENTS Bake Speed Bake Broil Conv. Bake Conv. Roast Clean Locking Locked Unlocking Unlocked Light Door Open Door Closed X X X X X X X X X X X X* X* X X X X X X X X X NO NC NC NO X X X X X X X X X X X X X Relay will operate in this condition only * Convection element and fan are used for the first rise of temperature on the models with hidden bake element. 5 2 SPEED COOLING FAN The oven control controls the speed of the cooling fan. The cooling fan is activated at low speed during any cooking function. The high speed is activated during clean cycles only when the temperature is above approximately 575°F. EXPLODED VIEW OF CONVECTION OR SPEED BAKE SYSTEM (some models) Fan motor assembly Mounting Plate Oven cavity Fan nut Convection element (Convection models only) Fan blade Fan cover Fan cover screws FAN BLADE The fan blade is mounted in the rear of the unit and has a "D" shaped mounting hole. Only minimum clearance exists between the oven back, fan blade, and fan shroud. Be careful not to bend blade when removing or installing. Access to the fan blade is gained by removing the fan shroud, held in place by three screws, from the inside of the oven. The fan blade is held in plac ...