Wolf Wall Oven Series Electronic Control System
Electronic Control Terminology & Component Descriptions
All Wolf wall ovens utilize an electronic control system. This system monitors, regulates, and controls various functions, and displays error codes to identify potential problems. The following table defines basic electronic control system terminology and components:
| Term / Component | Definition / Description |
| Oven Controller | The printed circuit board containing the microprocessor and logic inputs, communicating with the oven display, keyboard, and stepper motor control board. |
| Relay Board | The printed circuit board containing the microprocessor, relays, and electrical connections that control and monitor unit functions. |
| Oven Display | A vacuum fluorescent display showing oven temperature, cooking modes, error codes, cook times, and stop time. |
| Stepper Motor Control Board | The printed circuit board with a transformer and logic control to drive the stepper motor. |
| Control Panel Assembly | The head assembly containing the oven display(s) and keyboard. |
| Relays | Electrical components on the relay board that switch other components ON and OFF as instructed by the microprocessor. |
| Microprocessor | An electrical component on the control board that receives electrical signals, processes information, and sends signals to relays and other components to switch them ON or OFF. |
| Keyboard | An assembly of glass and mylar connecting to the upper oven display. |
| Error Codes | A number or word description appearing on the oven display if specific problems related to electrical signals occur. |
| MDL | Motor door latch assembly including the latch motor drive, unlatch switch, latch switch, and door switch. |
| RTD | The oven(s) temperature sensing device. |
| DLB | A component on the relay board that connects and disconnects the L2 line to the elements when energized by logic from the oven controller. |
Unique Electronic Control Input Operations
The following sections detail electronic control input operations that customers may perform:
Field Option Mode
Allows adjustment of specific oven controller options:
- User Preference Offset: Adjusts oven temperature ±35°F in 1°F increments. Enter numeric value, then press TEMPERATURE to toggle ±. Accepted after 10 seconds or ENTER key press. Only works for °F.
- Temperature Display Preference: Choose between °F (Fahrenheit) or °C (Celsius). Press COOK TIME key to toggle. Accepted after 10 seconds or ENTER key press.
- Clock Display Preference: Choose between 12-hour or 24-hour clock. Press CLOCK key to toggle. Accepted after 10 seconds or ENTER key press.
Note: Field Option Mode must be entered with the oven(s) turned OFF. Press and hold TEMPERATURE for five seconds to initiate. CLEAR key cancels the mode.
Sabbath Feature
Incorporated for observance of religious holidays. Once entered, all oven functions are disabled except OFF. To initiate: Oven OFF, press Oven ON key (or Upper/Lower Oven ON for double ovens), press BAKE or ROAST key (sets 350°F), enter new temperature if desired, press ENTER. Then, press and hold ENTER for 5 seconds. "SABBATH" appears in the display. To exit, press Oven OFF key (or Upper/Lower Oven OFF).
Timed Cook Feature
Controls automatic oven timing (ON and OFF) by setting cooking time to start immediately and turn off upon completion. Requires the time of day clock to be set correctly. To initiate: Oven OFF, press Oven ON key, select cooking mode, set temperature, press COOK TIME key, enter hours/minutes. Oven starts heating after 5 seconds or ENTER press. To exit, press Oven OFF key.
Delayed Start Feature
Controls automatic oven timing (ON and OFF) to start later and turn off upon completion, or to turn off at a preset time. Requires the time of day clock to be set correctly. Not compatible with Broil, Convection Broil, and Bake Stone modes. To initiate: Oven OFF, press Oven ON key, select cooking mode, set temperature, press STOP TIME key, enter desired OFF time. Then, press COOK TIME key, enter hours/minutes oven will stay on. Press ENTER. To exit, press Oven OFF key.
Temperature Probe Feature
Measures internal food temperatures for precise doneness. For use, program recommended internal temperature minus 5°F. To initiate: Preheat oven, insert probe, plug into receptacle. Press PROBE key, enter temperature minus 5°F, press ENTER. "Lo" appears until probe reaches 100°F, then display shows rising temperature. Oven chimes when programmed temperature is reached. To exit, press Oven OFF key.
Self-Clean Mode
Heats oven to a high temperature (850°F) to burn off food soil, leaving ash residue. Door locks until temperature drops below 300°F. Average cycle time is 3 hours plus 1 hour cool down. For DO30, only one cavity can self-clean at a time. To initiate: Oven OFF, press Oven ON key, press SELF-CLEAN key, follow display prompts, press ENTER. Press ENTER again to activate. To exit, press Oven OFF key. Self-Clean time can be adjusted from 3 to 4 hours using the COOK TIME key.
Bake Mode
Uses hidden bake and broil elements. Hidden bake element operates ~80% of the time, broil element ~10%. Preheat is recommended. To initiate: Oven OFF, press Oven ON key, press BAKE key. Preset temperature is 350°F. Adjust temperature using number keys and ENTER. To exit, press Oven OFF key.
Convection Mode
Uses dual convection fans and heating elements for uniform air movement. Standard recipe temperature should be reduced by 25°F. Preheat is recommended. To initiate: Oven OFF, press Oven ON key, press CONVECTION key. Preset temperature is 325°F. Adjust temperature using number keys and ENTER. To exit, press Oven OFF key.
Convection Bake Mode
Combines heat from two convection elements and the hidden bake element. Ideal for pie baking. Convection elements are on 45% of the time, hidden bake element on 90%. Standard recipe temperature should be reduced by 25°F. Preheat is recommended. To initiate: Oven OFF, press Oven ON key, press CONVECTION BAKE key. Preset temperature is 375°F. Adjust temperature using number keys and ENTER. To exit, press Oven OFF key.
Broil Mode
Uses the top broil element for intense radiant heat. Food must be turned to finish cooking. Three broil levels: Hi (550°F), Medium (450°F), Lo (350°F). Preheat is not used. Oven door must be closed. To initiate: Oven OFF, press Oven ON key, press BROIL key. Preset is 550°F (HI). Select level using number keys (2 for Medium, 3 for Lo). Press ENTER. To exit, press Oven OFF key.
Convection Broil Mode
Uses top broil element and convection fans for continuous air movement. Shortens broiling times for thicker meats. Browns exterior, keeps interior moist. Preheat is not used. Oven door must be closed. To initiate: Oven OFF, press Oven ON key, press CONVECTION BROIL key. Preset temperature is 550°F (HI). Select level using number keys (2 for Medium, 3 for Lo). Press ENTER. To exit, press Oven OFF key.
Roast Mode
Uses hidden bake and broil elements. Hidden bake element operates 75% of the time, broil element 25%. Ideal for roasting tender cuts of meat. Preheat is recommended. To initiate: Oven OFF, press Oven ON key, press ROAST key. Preset temperature is 350°F. Adjust temperature using number keys and ENTER. To exit, press Oven OFF key.
Convection Roast Mode
Uses dual convection fans and convection elements, plus top broil element. Convection elements are on 46% of the time, broil element 16%, convection fans 100%. Intensifies convective and radiant heating. Browns exterior, seals in juices. Perfect for roasting tender meats. Preheat is recommended. To initiate: Oven OFF, press Oven ON key, press CONVECTION ROAST key. Preset temperature is 325°F. Adjust temperature using number keys and ENTER. To exit, press Oven OFF key.
Bake Stone Mode
Uses a specially designed rack, heating element, and ceramic stone. Bake stone element is on 58% of the time, broil element 42%. Convection fans are on 42% of the time. Remove all oven racks, insert bake stone element, place bake stone on rack. Preheat is recommended. To initiate: Oven OFF, press Oven ON key, press BAKE STONE key. Preset temperature is 400°F. Adjust temperature using number keys and ENTER. To exit, press Oven OFF key.
Dehydration Feature
Slowly dries out food. Requires an optional accessory package. To initiate: Oven OFF, press Oven ON key, press and hold CONVECTION key for 3 seconds. Preset temperature is 160°F. Adjust temperature using number keys and ENTER. Dehydration range: 110°F - 160°F. Preheat is not used. To exit, press Oven OFF key.
Proof Feature
Uses Broil, Convection, and Bake elements to heat and balance air for proofing bread dough. Maximum temperature is 110°F. If temperature exceeds 130°F, "HOT" is indicated. Open door to cool below 120°F. To initiate: Oven OFF, press Oven ON key, press and hold BAKE key for 3 seconds. Preset temperature is 85°F. Adjust temperature using number keys and ENTER. Proofing range: 85°F - 110°F. To exit, press Oven OFF key.
Panel Lock
Disables all modes and keypads except Oven OFF and PANEL LOCK touch pads for child safety. To set: Press and hold Panel Lock for 3 seconds. "PANEL LOCKED" appears. To exit: Press and hold Panel Lock for 3 seconds. "PANEL UNLOCKED" appears.
Time of Day Clock
Set the 12-hour clock to the current time after power up. Must be reset after power failure. Visible during all modes unless a timer is set. To set: Touch Clock pad, touch number pads for time, touch Clock or Enter to start.
Diagnostic Mode
Allows Service Technicians to inspect functionality of Oven Controller and Relay boards. Enter specific key combinations to access. Displays last seven errors. Double Oven stores fourteen errors (seven per oven). To clear errors, press COOK TIME and STOP TIME keys simultaneously while in Diagnostic Mode. To toggle between error codes, press ENTER key.
Initiating Diagnostic Mode
- Upper Oven: Oven OFF, press and hold TEMPERATURE and '0' keys for 3 seconds, release.
- Lower Oven: Oven OFF, press and hold TEMPERATURE and '0' keys for 3 seconds, release.
- Single Oven: Oven OFF, press and hold TEMPERATURE and '0' keys for 3 seconds, release.
Note: Diagnostic Mode ends 2 minutes after last key stroke or when CLEAR key is pressed.
Possible Error Indicators
The last occurring error is shown in the display. Pressing ENTER cycles through the last seven errors. COOK TIME and STOP TIME keys clear the last seven errors.
- F1: Door lock or unlock switches not sensed within 60 seconds (MDL failure).
- OVER TEMP: Oven reaches 630°F (unlocked door) or 930°F (locked door) (runaway temperature).
- RTD OPEN: Open circuit detected on RTD Oven Sensor (RTD failure).
- RTD SHORTED: Shorted circuit detected on RTD Oven Sensor (RTD failure).
- KEYBOARD ERROR: Failure between Oven Controller and Head Assembly.
- COMM ERR: Communication lost with Oven Controller Board (Head Assembly failure or cable fault).
- CHECKSUM: Eeprom Checksum incorrect (Oven Controller failure).
- PROBE SHORTED: Meat probe sensed as shorted (probe not inserted fully or probe failure).
- EEPROM: Cannot Read or Write to Eeprom (Oven Controller failure).
- SENSOR CAL: Analog to Digital Error during Calibration Phase (Oven Controller failure).
- CONTROL COM: Communication Lost with Oven Control Board (Oven Controller failure).
- RELAY CAL: Relay Phase Calibration Failed (relay timing problem with relay board).
- RELAY STUCK: Power Relay Shorted (failure of a Relay Board).
- COOL FAN: Cooling Fan failure.
- SPI COM ERR: SPI communication lost with main controller (bad main controller).
- FUSES WRONG: Controller configurations settings incorrect or code protection disabled.
Testing the Oven Relay Board
Access Diagnostic Mode. Press a key to activate an element. The element relay and double line breaker close to complete a 240/208 VAC circuit. OVEN ON illuminates if current is detected.
| Key Pressed | Relay(s) activated | Display Response |
| Bake | Inner Bake Element | Oven On Illuminated |
| Broil | Broil Element | Oven On Illuminated |
| Bake Stone | Bake Stone Element | Oven On Illuminated |
| Convection Bake | Outer Bake Element and Convection Fan | Oven On Illuminated |
| Convection Broil | Right Convection Element | Oven On Illuminated |
| Convection | Left Convection Element | Oven On Illuminated |
Fans and Motors
Access Diagnostic Mode. Press a key to activate a fan or motor. Fan and motor relays close to complete a 120 VAC circuit. An indicator illuminates if functionality is detected.
| Key Pressed | Relay(s) activated | Action | Display Response |
| Roast | Motor Door Lock (MDL) | MDL switch in open position MDL in transition |
Degree Icon (°) Illuminated Degree and Centigrade Icon Off |
| Convection Roast | Oven Light | Light turns on | Not applicable |
| Self Clean | Cool Fan Low | Cool Fan Low | COOL FAN LO |
| 0 | Cool Fan High | Cool Fan High | COOL FAN HI |
| Key 7 | Left Convection Fan | Left Convection Fan | L CONV ON |
| Key 9 | Right Convection Fan | Right Convection Fan | R CONV ON |
| Panel Lock | Fan Apparency logging | Used on units prior to serial number 11100847 which used fan apparency switches. | "L" = Fan apparency switch Note: No display means no fan apparency switches. |
Note: Prior to running tests on units produced after August 2007, set Temperature Display Preference to °F.
RTD Testing
Access Diagnostic Mode. RTD temperature as read by the Oven Controller is shown in the display.
Probe Testing
Access Diagnostic Mode. Probe temperature as read by the Oven Controller is shown in the Stop Cook digits. If probe not inserted, "0" is shown. If probe is shorted, "998" is shown.
