SERVICE DATA SHEET 318047305 (0406) Rev. B 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 and Convection Roasting modes (some models),Timed and Delayed Baking, and Cleaning functions. 2. Convection operates with an element and a fan dedicated to convection (some models). 3. This EOC has a touch sensitive membrane. 4. 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. Upper Oven Cook Time P R B Lower Oven AM PM P R B Bake Broil Bake Broil Cook Time CONV BROIL PRECONV BROIL PREDELAY TIMED BAKE DELAY TIMED BAKE CLEAN LOCK ON CLEAN OVEN 1 2 STOP ON TIMER CLEAN LOCK ON Select Clean Warm & STOP Clear 3 Hold Delay Start Set/Off Timer Add 1 Minute Select Clean Warm & STOP Clear 3 Hold Delay Start Oven Lockout Oven Lockout UPPER OVEN CONV BAKE CONV CONV ROAST CONVERT SLOW COOK DELAY START START P R B START AM PM P R B LOWER OVEN BAKE BROIL CONV BROIL PRECONV BROIL PREDELAY TIMED BAKE DELAY TIMED BAKE CLEAN LOCK ON CLEAN OVEN 1 2 STOP ON TIMER CLEAN LOCK ON CONV BAKE ADD 1 MINUTE CONV CONV ROAST CONVERT SLOW COOK DELAY START BAKE BROIL FLEX CLEAN OVEN LIGHT ON/OFF WARM & HOLD OVEN COOK TIME TIMED OVEN PRE HEAT FLEX CLEAN OVEN LIGHT ON/OFF WARM & HOLD OVEN COOK TIME TIMED OVEN PRE HEAT STOP CLEAR OVEN LOCKOUT CLOCK KITCHEN TIMER ON/OFF STOP CLEAR OVEN LOCKOUT Up p e r Ov e n Conv bake Pre heat Speed clean Bake time Oven light P R B Even-Cook Convection Ovens AM PM P R B L o we r Ov e n Conv bake Pre heat Speed clean Bake time Oven light CONV BROIL PRECONV BROIL PREDELAY TIMED BAKE DELAY TIMED BAKE CLEAN LOCK ON CLEAN OVEN 1 2 STOP ON TIMER CLEAN LOCK ON Conv convert Bake Clean Start time Clear /Off Controls UPPER OVEN LOWER OVEN Conv convert Bake Clean Start time Clear /Off Controls 1 6 2 7 3 8 4 9 5 0 Clock Timer On/Off Conv roast Broil Maxx clean Keep warm START 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 P R B Speed Bake Ovens AM PM P R B L owe r Ov e n Bake Speed bake Speed clean Bake time Clear /Off Controls CONV BROIL PRECONV BROIL PREDELAY TIMED BAKE DELAY TIMED BAKE CLEAN LOCK ON CLEAN OVEN 1 2 STOP ON TIMER CLEAN LOCK ON UPPER OVEN LOWER OVEN Broil Keep warm Clean Start time Oven light START Clock Timer On/Off Broil Keep warm Clean Start time Oven light START Electronic oven control relay board P19 J1 P28 P26 P27 P17 P31 A B P29 P2 P P3 P33 C D E P25 P24 O P4 N P9 M P10 F P32 L G H I J K P11 P34 P21 P20 P22 P23 P8 P1 P18 This relay serves to energize the upper and lower oven heating elements, convection and door lock motors, and oven lamp. It also powers the display board. Relay Board Legend: A. Lower MDL relay B. Lower convection fan relay C. Lower cooling fan relay D. Upper MDL relay E. Upper convection fan relay F. Upper cooling fan relay G. Upper light relay H. Lower light relay I. Lower DLB relay J. Upper DLB relay K. Lower convection relay L. Lower bake relay M. Lower broil relay N. Upper convection relay O. Upper bake relay P. Upper broil relay 2 ELECTRONIC OVEN CONTROL (continued) Electronic oven control display board P3 P8 P4 P2 P1 P1 connector: P3 connector: P4 connector: This 9 pin connector is connected to the relay board. This 1 or 2 X 17 pin connector is connected to the keyboard. This 6 pin connector is used for Micro programming. OVEN ELEMENT - OPERATION Baking mode -First rise: -Normal baking: Bake element is on 40 seconds per minute. Broil element is on 19 seconds per minute. Bake element is on between 40 and 42 seconds per minute. Broil element is on between 5 and 8 seconds per minute. Broil element is on for 60 seconds per minute. -First rise: -Convection baking: Convection Roast -First rise: -Convection roast: Bake element is on 40 seconds per minute. Broil element is on 19 seconds per minute. Convection element is on for 60 seconds per minute. Bake element is on 40 seconds per minute. Broil element is on 19 seconds per minute. Bake element is on for 50 seconds per minute. Broil element is on for 9 seconds per minute. Bake element is on for 60 seconds per minute and broil element is off. Bake element is on for 20 seconds per minute. Broil element is on for 40 seconds per minute. Broiling mode Convection mode Clean mode: -Models with hidden bake: 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 IS ON A SELF-CLEANING CYCLE. 3 TERMINAL BOARD CONNECTORS N P23 P22 P20 L 1 P21 N Display Board P3 (2x17 pins) KEYBOARD P1 & J1 Pin Designations: 1- Filament 1 5- RS485 Comm1 2- Filament 2 6- Rs485 Comm2 3- Ground 7- +12V 4- Vdisp 8- Not used 9- Second PB P1 (9 pins) J1 (9 pins) *Micro Programming P29 (6) Power Board P33-7 P31-4 Upper MDL (K13) Lower MDL (K16) Flash and eeprom P4 (6 pins) *Micro Programming Flash L1 P32-1 OR P34 P2 P3 L1 P33-5 OR P19 Upper Broil (K2) Upper Bake (K3) Upper Conv Ring (K4) Lower Light (K5) Upper Light (K6) Upper Cooling Fan (K7) Door 1 Position Door Lock 1 Common Door 1 Lock Door 1 Unlock RTD 1 P27-5 P27-3 P27-6 P27-7 P27-9 P4 P17 P32-3 P33-1 P33-2 Display * Micro Programming 1 - MISO 2 - +5V 3 - SCK 4 - MOSI 5 - Reset 6 - GND Beeper RTD Common 1 P27-10 DLB K1 P24 P1 P9 P10 P11 Lower Broil (K9) Lower Bake (K10) Lower Conv Ring (K11) Upper Conv Fan (K12) Lower Cooling Fan (K14) Lower Conv Fan (K15) Door 2 Position Door Lock 2 Common Door 2 Lock Door 2 Unlock RTD 2 P28-4 P28-3 P28-6 P28-7 P28-8 P18 P33-4 P31-1 DLB K8 P25 P8 P31-2 RTD Common 2 P28-9 L2 L1 4 ELECTRONIC OVEN CONTROL (FAULT CODES) ELECTRONIC OVEN CONTROL (EOC) FAULT CODE DESCRIPTIONS Note: Only four fault codes series are displayed by this control "F1", "F2", "F3" and "F9". Generally speaking "F1" implies a control failure, "F2" a bad communication between display board and relay board, "F3" an oven probe problem, and "F9" a latch motor problem. Fault Code Series Likely Failure 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 Press Clear or Cancel key. Check RTD sensor probe and replace if necessary. If oven is overheating, disconnect power. If oven continues to oveheat when power is reapplied, replace EOC. Severe overheating may require the entire oven to be replaced, should damage be extensive. Press Clear or Cancel key. F1 (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. (F13) Control's internal checksum may have become corrupted. Press Clear or Cancel key. Disconnect power, wait 30 seconds ad reapply power. If fault returns upon power-up, replace EOC. Press Clear or Cancel key. Replace Relay board. (F14) Relay watchdog failure. F2 F3 (F20) Bad communication between display board and relay board. (F30) Open RTD sensor probe/ wiring problem. Note: EOC may initially display an "F10", thinking a runaway condition exists. (F31) Shorted RTD sensor probe / wiring problem. Note: "F31" is displayed when oven is in active mode or an attempt to enter an active mode is made. (F32) Key loop is detected as an open cicuit. Press Clear or Cancel key. Verify connections between 2 boards (P1 and J1). Press Clear or Cancel key. 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 Press Clear or Cancel key. Verify if the the keyboard is connected (P3). 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, and 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 A 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 EOC. F9 (F90 and F95) Door motor mechanism failure. 5 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 Convection Element Wattage Broil Element Wattage KW rating 240/208 Bake Element Wattage ELECTRICAL RATING 27" 8.2/6.2 Vary depending on model: 2300W/17820W or 2700W/2028W 3400W/2554W 30" 8.2/6.2 3400W/2554W Vary depending on model: 2750W/2065W or 4000W/3004W Vary depending on model: No convection element or 350W element 2500W element Vary depending on model: No convection element or 350W element OVEN TEMPERATURE SENSOR UPPER OVEN CIRCUIT ANALYSIS MATRIX ELEMENTS Bake P3 Broil Conv. Conv.Fan P4 P2 P33-4 X* X X X X X* Light Door Motor P33-1 P33-7 Lock Motor Switches P27-3 A P27-3 & P27-7 & P27-6 Bake Broil Conv. Bake Conv. Roast Clean Locking Locked Unlocking Unlocked Light Door Open Door Closed X X X X Door Switch DLB L2 out P27-5 / P27-3 COM-NO P24 X X X X X Cooling Fan P33-2 Low Speed Low Speed Low Speed Low Speed Low & High Speed X X X X NC NO NO NC NO NC NC NO X * Denotes Top heat Relay will operate in this condition only LOWER OVEN CIRCUIT ANALYSIS MATRIX ELEMENTS Bake Broil Conv. Conv.Fan P10 P11 P9 P31-2 X* X X X X X X X X* X Light Door Motor P32-3 P31-4 Lock Motor Switches P28-3 A P28-3 & P28-7 & P28-6 Bake Broil Conv. Bake Conv. Roast Clean Locking Locked Unlocking Unlocked Light Door Open Door Closed Door Switch DLB L2 out P28-3 / P28-4 COM-NO P25 X X X X X Cooling Fan P31-1 Low Speed Low Speed Low Speed Low Speed Low & High Speed X X X X NC NO NO NC NO NC NC NO X * Denotes Top heat Relay will operate in this condition only 6 PREHEAT (some models) During a preheat mode, the oven uses a bake element to reach the controller set point. The element uses full power when it's on. When the set point is reached, the preheat mode is converted to a normal bake mode. NORMAL BAKE MODE During a normal bake mode, the oven uses top heat by cycling the broil element on for 5 - 8 seconds each minute. Both elements use full power when they are on. 2 SPEED COOLING FAN A relay and a thermostat (170°/140°) control the speeds of the blower. EXPLODED VIEW OF CONVECTION OR SPEED BAKE SYSTEM (some models) MOUNTING PLATE FAN MOTOR ASSEMBLY OVE ...