Troubleshooting
TROUBLESHOOTING
This section of the manual contains troubleshooting information which will help the Service Technician troubleshoot a Wolf E-Series Wall Oven. The table of contents below shows how the troubleshooting guide section of this manual is laid out.
Troubleshooting Table of Contents
Description | Page # |
---|---|
Glossary & General Information | 5-3 |
Diagnostic Mode | 5-4 |
Initiating Diagnostic Mode | 5-4 |
(Auto) Self Test | 5-5 |
Manual Test | 5-5 |
Non-Heating Device Test Table | 5-5 |
Heating Device (Element) Test Table | 5-6 |
Error History | 5-6 |
Version Information | 5-7 |
Statistics | 5-7 |
Possible Error Indicators | 5-8 |
Error Priority | 5-8 |
Error Table 1 - External Components | 5-8 |
Error Table 2 - Internal Components | 5-9 |
Error Table 3 - System Components | 5-10 |
General Troubleshooting Guide | 5-10 |
Relay Board Multi-color Status LED | 5-12 |
Diagnostics Flow Chart | 5-13 |
Manual Test Flow Chart | 5-14 |
Statistics Flow Chart | 5-15 |
User Options Flow Chart | 5-16 |
Resistance (Ohm) Charts - Single Oven | 5-17 |
Resistance (Ohm) Charts - Double Oven | 5-18 |
GLOSSARY & GENERAL INFORMATION
The following acronyms and their descriptions are relevant to the Wolf E-Series Wall Oven:
ACRONYM | ALTERNATE DESCRIPTION | DESCRIPTION | ALTERNATE DESCRIPTION |
---|---|---|---|
CRC | Cyclical Redundancy Check | ||
DLB | Double Line Break | ||
DLL | L2 Relay on Relay Board | ||
EON | End of Cycle | ||
FMEA | Failure Mode and Effects Analysis | ||
HSWD | HIV | High Side Watch Dog | |
HV | High Voltage Micro | ||
HIV | |||
LATD | Lower Auxiliary Time Display | ||
LCD | Liquid Crystal Display | ||
LIL | LILA | Lower Information Line | Display Phrase |
LV | LOV | Low Voltage Micro | |
MDL | MDS | Motor Door Lock | |
MTD | Main Temperature Display | ||
RM | RMA | Relay Module | |
RTF | RTD | Resistive Thermal Device | |
S/N | Serial Number | ||
SPI | Serial Peripheral Interface | ||
TCO | Thermal Cut-out | ||
TOD | TODD | Time of Day Display | Idle Mode |
UATD | Upper Auxiliary Time Display | ||
UIL | URL | Upper Information Line | |
UIM | UM | User Interface Module |
The display interface includes an UPPER INFORMATION LINE and a LOWER INFORMATION LINE, along with indicators for TIMER, CLOCK, PROBE, COOK TIME, and STOP TIME.
DIAGNOSTIC MODE
Diagnostic Mode allows the Service Technician to inspect the functionality of the Oven Controller and Relay boards, as well as electrical components. It displays the last twenty errors and monitors relays, temperature, and switches.
Initiating Diagnostics Mode
To enter Diagnostic Mode, press and hold the SET TIMER key for approximately five (5) seconds while both cavities are in Idle Mode. The system will prompt to enter Diagnostics/Showroom Menu mode. The Lower Information Line will scroll options like "PRESS 1 TO ENTER DIAGNOSTICS MODE." The Upper Information Line will show the Showroom mode status (ON or OFF).
With "SHOWROOM MODE OFF" displayed, press the “1” key to initiate Diagnostic Mode. The display will show "DIAGNOSTICS" and a menu will scroll across the bottom, offering options such as:
- PRESS 1 = SELF TEST
- PRESS 2 = MANUAL TEST
- PRESS 3 = ERROR HISTORY
- PRESS 4 = VERSION INFO
- PRESS 5 = STATISTICS
To exit Diagnostic Mode, press the OVEN OFF key. The mode also ends five (5) minutes after the last key press.
Figure 5-1. Selecting Diagnostics Mode shows a diagram of the control panel with instructions to press and hold the SET TIMER key for 5 seconds, then press 1 for Diagnostics.
(Auto) Self Test
After entering Diagnostics, press “1” for (Auto) Self Test and then “ENTER”. The display will show "SELF TEST ACTIVE" and "TESTING... PLEASE WAIT".
NOTES:
- Pressing the CLEAR key will stop the test and return to the previous menu.
- Pressing the OFF key will stop the test and display the Tim of Day.
When testing is complete, the display shows "SELF TEST RESULTS" with test results and service instructions. The CLEAR key returns to the initial Diagnostic Mode menu.
Figure 5-2 Selecting Self Test shows the control panel after entering Diagnostics Mode and selecting Self Test.
Manual Test
Manual Test uses the electronic control to force operation of electrical devices to verify their function. Additional equipment like a VOM may be needed for full verification.
After entering Diagnostics, press “2” for Manual Test. Then press the appropriate key for the desired test or press ENTER to cycle through tests. Refer to the tables for specific key presses and expected display responses.
NOTES:
- If a communication failure exists between UIM and Relay Module, Manual Test entry will be inhibited.
- When a test is initiated, power is supplied until the same key is pressed again.
- For double ovens, the UPPER/LOWER oven key is used to access specific oven devices.
- To exit Manual Tests: Press LOCK to return to the Initial Diagnostics Menu, CLEAR to revert to the previous test/menu, or OVEN OFF/UPPER/LOWER to turn off the current test.
Figure 5-3. Selecting Manual Test shows the control panel with instructions to press “2” to initiate Manual Test.
Non-Heating Devices Testing Table
Key Pressed | Relay(s) Activated | Action | Display Response |
---|---|---|---|
Key 6 | Cooling Fan | Cooling Fan | Cooling fan test on |
Key 7 | Motor Door Lock (MDL) | MDL Switch in open position | MDL is open |
Motor Door Lock (MDL) | MDL in transition | MDL is in process: Up arrow illuminated | |
Motor Door Lock (MDL) | MDL Switch in closed position | MDL is closed: Up arrow illuminated | |
Key 8 | Left Convection Fan | Left Convection Fan | Left Convection Fan test on |
Key 9 | Right Convection Fan | Right Convection Fan | Right Convection Fan test on |
Upper/Lower | Not Applicable | Switch to opposite cavity | |
Oven Light | Oven Light | Light turns on | Lights Test on |
Timed Cook | Beeper | Beeper | Beeper Test on |
Lock | None | Returns to Initial Service Menu |
Heating Devices (Element) Testing Table
Key Pressed | Relay(s) Activated | Display Response (Upper & Lower Information Lines) | |
---|---|---|---|
Bake | Inner Bake Element | Inner Bake Element On | Press Bake to toggle |
Broil | Broil Element | Broil Element | Press Broil to toggle |
Convection Bake | Outer Bake Element | Outer Bake Element | Press Conv. Bake to toggle |
Convection Broil | Right Convection Element | Right Conv. Element | Press Conv. Broil to toggle |
Convection | Left Convection Element | Left Conv. Element | Press Conv. to toggle |
Error History
After entering Diagnostics, press “3” for Error History. The display will show "Error History". If errors are stored, it will prompt "PRESS 1 TO VIEW ERROR HISTORY, PRESS 2 TO CLEAR ERROR HISTORY". If no errors are stored, it will display "NO ERRORS STORED. PRESS CLEAR TO RETURN".
Pressing “1” shows the first logged error, and the ENTER key cycles through multiple errors. After the last error, ENTER returns to the initial prompts.
To clear error history, re-enter Error History and press “2”. The prompt "Press 1 = No, 2 = Yes" will appear. Pressing “2” clears all history.
NOTES: Error History can be exited using the LOCK, CLEAR, or OVEN OFF keys.
Figure 5-4. Selecting Error History shows the control panel with instructions to press “3” to initiate Error History.
Version Information
Version information is used for manufacturing purposes. It includes:
- “RMHV” (Relay Module - High Voltage)
- “RMLV” (Relay Module - Low Voltage)
- “UIM" (User Interface Module)
- “CfgCRC” (UIM Configuration)
- "Data Logger Version"
- “S/N” (Serial Number)
To view Version Information, enter Diagnostics, press “4”. The display will show "Version Info" and then cycle through the listed areas of interest by pressing ENTER.
NOTES: Version Information can be exited using the LOCK, CLEAR, or OVEN OFF keys.
Statistics
To observe Statistical Information, enter Diagnostics, then press “5”. The display will show "Statistics" and prompt "Press ENTER for Stats". Toggling through statistics is done by pressing ENTER.
For double ovens, the UPPER/LOWER key switches between ovens. Pressing SET TIMER allows viewing the last 5 functions.
If statistical data is corrupted or missing, "NO MODE" will be displayed, and all data items will be 0.
NOTES: Statistics can be exited using the LOCK, CLEAR, or OVEN OFF keys.
Possible Error Indicator Displays
The tables below list error phrases that may appear on the LCD. The left column indicates priority (not displayed), the middle column shows the error phrase, and the right column explains the failed part or action.
Error Priority
There are three priority levels:
- Priority 1: Safety-related or catastrophic errors. The control is inoperable. These errors are continuously displayed, require a service call, and prevent user functions.
- Priority 2: Errors that limit proper functionality and may cause customer dissatisfaction. These are displayed during active modes or attempts to start a mode. They can be cancelled but will reappear if the condition persists.
- Priority 3: Errors that may cause minor or conditional impairment, often unnoticed by the end user. These are logged internally and generally not cancelable by the user.
ERROR TABLE #1 - EXTERNAL COMPONENTS
Priority | Displayed Phrase | Service Instruction |
---|---|---|
2 | RTD Open | (Upper/Lower) RTD failure (device or wiring) |
2 | RTD Shorted | (Upper/Lower) Meat Probe failure (device or wiring) |
2 | Temp Probe Short | |
3 | No Inner Bake element detect | Check specified element & wiring |
3 | No Outer Bake element detect | |
3 | No Broil element detect | |
3 | No Lt Conv element detect | |
3 | No Rt Cony element detect | |
3 | No MDL detect | Check specified MDL & wiring |
3 | No Left Convect Fan detect | Check specified fan & wiring |
3 | No Rt Convect Fan detect | |
3 | No Cooling Fan detect | |
3 | No Oven Light detect | Check specified oven light transformer & wiring |
2 | Lock inputs invalid | Check door motor assy & wiring |
2 | Lock/Door inputs invalid for Clean | |
2 | MDL run timeout | |
2 | TCO detect as open | Check air flow, verify cooling fan operational |
2 | Brownout error | Check home wiring, voltages, replace Relay Module |
2 | Inner Bake relay shorted | Check connections, replace Relay Module of the oven indicated |
ERROR TABLE #2 - INTERNAL COMPONENTS
Priority | Displayed Phrase | Service Instruction |
---|---|---|
2 | Outer Bake relay shorted | |
2 | Broil relay shorted | |
2 | Left Convect relay shorted | |
2 | Right Convect relay shorted | |
2 | MDL relay shorted | |
3 | Left Convect Fan triac shorted | |
3 | Right Convect Fan triac shorted | |
3 | Cooling Fan triac shorted | |
3 | Oven Light relay shorted | |
2 | DLB1 shorted | |
2 | DLB2 shorted | |
3 | Aux DLB shorted | |
3 | Inner Bake relay open | |
3 | Outer Bake relay open | |
3 | Broil relay open | |
3 | Left Convect relay open | |
3 | Right Convect relay open | |
3 | MDL relay open | |
3 | Left Convect Fan triac open | |
3 | Right Convect Fan triac open | |
2 | Cooling Fan triac open | |
3 | Oven Light relay open | |
2 | DLB1 relay or TCO open | |
2 | DLB2 relay open | |
2 | Aux DLB open | |
2 | RTD Circuitry error | |
3 | RM EE checksum error | |
3 | HIV SPI com err detected by RM control | |
3 | HIV SPI com err detected by HV-micro | |
3 | HIV micro feedback error | |
1 | RM LOV fuse error | |
3 | RM HIV fuse error | |
2 | HSWD active, should be inactive | |
2 | HSWD inactive, should be active | |
3 | RM Ambient Thermistor open error | |
3 | RM Ambient Thermistor shorted error | |
3 | RM Line Voltage A/D error | |
2 | MDL circuitry error | |
2 | RM FMEA circuitry error | |
1 | Keypad circuit error | Check keypad & connections |
1 | Keypad comm error detected by the UIM | |
1 | Keypad comm error detected by the Keypad | |
1 | Keypad FMEA error | |
1 | Keypad EE CRC error | |
3 | Keypad mains sync error |
ERROR TABLE #3 - SYSTEM COMPONENTS
Priority | Displayed Phrase | Service Instruction |
---|---|---|
3 | UIM EE checksum error | Replace UIM Module |
1 | UIM configuration data CRC error | |
1 | UIM fuse error | |
3 | UIM ambient thermistor open error | |
3 | UIM ambient thermistor shorted error | |
1 | LCD module error | |
2 | Communications error detected by the UIM | Check com harness, replace Relay Module |
2 | Communications error detected by the RM | Check com harness, replace UIM Module |
2 | Overtemp error - door unlocked | Check door motor assy & wiring, replace Relay Module |
2 | Overtemp error - door locked | Replace Relay Module |
2 | RM Ambient overtemp error | Check air flow, verify cooling fan operational, replace relay module |
2 | UIM Ambient overtemp error | Check air flow, verify cooling fan operational, replace UIM. |
3 | Self-clean rate-of rise error | Check oven for leaks, insulation problems. Run diagnostics, look for open outputs or loads |
General Troubleshooting Guide
Problems Associated with the Control Panel
- A. Oven Display NOT Working
- B. Unresponsive Key Pad
Problems Associated with Temperature
- C. Long Preheat Time
- D. No Preheat
- E. Oven Temperatures Too High or Too Low
- F. Temperature Probe NOT Working
Problems Associated with the Door Lock
- G. Door Will NOT Lock In Self-Clean Mode
Problems Associated with the Cooling Fan
- H. Cooling Fan Does NOT Work
- I. Cooling Fan Noisy
Problems Associated with the Convection Fan
- J. Convection Fan Does NOT Work
- K. Noisy Convection Fan
- L. Convection Fan Does NOT Shut Off When Door Open
Problems Associated with the Oven Light
- M. Oven Light Does NOT Work
Problems Associated with the Beeping
- N. Random beeping
PROBLEM | POSSIBLE CAUSE | TEST / ACTION |
---|---|---|
A. OVEN DISPLAY NOT WORKING | No power, circuit breaker tripped | Reset circuit breaker. May have to call an electrician |
Loose or defective wire connection(s) | Repair or replace wiring | |
Defective relay board | Perform testing procedure located at end of section 5 | |
Defective control board | Perform testing procedure located at end of section 5 | |
Defective head assembly | Perform testing procedure located at end of section 5 | |
B. UNRESPONSIVE KEY PAD(S) | Key panel in locked mode | Press and hold lock key for three seconds to unlock |
Oven in sabbath mode | Press Off key to exit sabbath mode | |
Loose connection to flat flex cable from control panel assy. to oven control board. | Check cable connections. Unplug and reseat. Test key again, still not working replace head assembly | |
Small Black two pin connector from power board to relay board not connected. | ||
C. LONG PREHEAT (In all modes except broil) | Defective element | Check for error codes in diagnostic mode. Perform element testing procedure. Replace if defective |
D. NO HEAT (In all modes) | Defective Door Switch | Replace Door Switch |
Loose or defective wire connection(s) | Repair or replace wiring | |
Shorted or open element | Check for error codes in diagnostic mode. Perform element testing procedure. Replace if defective | |
Defective relay board | Check for error codes in diagnostic mode. Perform testing procedure located at end of section 5 | |
TCO tripped or open | Check temperature reading of TCO, should be 350°F. If not, replace limit with correct part. Reset | |
E. OVEN TEMPERATURE TOO HIGH OR TOO LOW | Customer using wrong temperature | Refer to Use/Care Guide for operation |
User Preference Offset mis-calibrated | Check UPO setting. Refer to instructions on page 3-3. Before making any temperature changes to UPO, check oven temperature with thermometer. UPO setting can be ±35°F. | |
F. TEMPERATURE PROBE NOT WORKING | Defective RTD Sensor | Check ohms of RTD Sensor according to technical data. Replace if out of specification |
Wrong cooking mode for probe | Refer to Use/Care Guide for operation | |
Probe not inserted all the way into the receptacle | Check for error codes in diagnostic mode. Insert probe into receptacle first before initiating diagnostic mode | |
G. DOOR WILL NOT LOCK IN SELF-CLEAN MODE | Loose or defective wiring | Check for error codes in diagnostic mode. Perform testing procedure. Repair or replace wiring. Align door as needed for proper closure. |
Door Alignment | ||
H. COOLING FAN DOES NOT WORK | Defective MDL (Motor Door Lock) | Ohm switches and motor. Replace if defective |
Loose or defective wiring | Repair or replace wiring | |
No power to cooling fan | Check for power from J3 on relay board while using diagnostic mode to toggle between speeds. Low speed, J3 - Pin 3 to Neutral (E3); High speed, J3 - Pin 1 to Neutral (E3). 120VAC ± 10% should be present. If not, replace relay board. | |
I. COOLING FAN NOISY | Air diverter bracket loose | Tighten air diverter bracket screws or replace rivets |
Defective cooling fan motor | Check for error codes in diagnostic mode. Perform testing procedure. Ohm motor, replace if out of specifications according to technical data. | |
J. CONVECTION FAN DOES NOT WORK | Defective Door Switch | Replace Door Switch |
Loose or defective wire connection | Repair or replace wiring | |
Defective convection motor | Check for error codes in diagnostic mode. Perform testing procedure. Replace convection fan assembly | |
K. NOISY CONVECTION FAN | Fan blade out of balance | Replace convection motor assembly |
Loose fan blade | Tighten nut for fan blade | |
Loose mounting | Tighten screws for mounting | |
L. CONVECTION FAN DOES NOT SHUT OFF WHEN DOOR OPEN | Defective door switch | Check continuity of door switch. Replace if defective |
M. OVEN LIGHT DOES NOT WORK | Defective bulb (if only one bulb out) | Replace bulb |
Loose or defective wiring | Repair or replace wiring | |
Defective fuse (if both bulbs out) | Replace fuse | |
Defective door switch (if both bulbs out) | Check continuity of door switch. Replace if defective | |
Defective key pad (if both bulbs out) | Replace control panel assembly | |
Defective transformer (if both bulbs out) | Replace transformer | |
N. RANDOM BEEPING | Defective relay board | Replace relay board |
Noisy Input Power | Check grounding wire. Install if missing | |
Display Case Plastic Bushing | If plastic bushing is there, remove it | |
Low Input Power | Replace relay board. |
Relay Board Multi-Color Status LED
There is a status LED on the Relay Board that will indicate unit status to a field technician. If the access cover over the Relay Board is removed when the unit goes into self test (either during power-up or when selecting Self Test) this indicator will show the following unit condition:
- Green (fully functional)
- Orange (component failure detected)
- Red or non-existent (Relay Board is bad)
Flow Charts
DIAGNOSTICS FLOW CHART
This flowchart illustrates the process for entering and navigating the Diagnostic/Showroom Mode, including Auto Self Test, Manual Test, Error History, Version Info, and Statistics. Key presses like ENTER, CLEAR, and LOCK have specific functions within the mode.
MANUAL TEST FLOW CHART
This flowchart details the steps for performing various manual tests on the oven components. It outlines the entry into Manual Test, the selection of specific tests (e.g., Beeper Test, Broil Element Test, Cooling Fan Test), and the expected display responses and key presses for each test.
STATISTICS FLOW CHART
This flowchart maps out the process for accessing and viewing unit statistics. It covers unit operation time, last 5 functions, and various operational metrics like preheat duration, overshoot, and call-for-heat cycles for different cooking modes.
USER OPTIONS FLOW CHART
This flowchart guides the user through the User Option Mode, which allows customization of settings such as Language Selection, Temperature Display Preference, User Preference Offset, Clock Display Preference, Backlight Brightness, LCD Contrast, and Beeper Tone Selection.
Ohm Test SO Components
WARNING: TO AVOID ELECTRICAL SHOCK, POWER TO THE UNIT MUST BE DISCONNECTED BEFORE ATTEMPTING THE FOLLOWING TESTS.
This table lists various components and their expected resistance (Ω) values, along with test points A and B for ohm testing. It is important to test the resistance of heating elements only when they are disconnected from the board.
Component | Resistance Ω | Test Point A | Test Point B |
---|---|---|---|
Temperature Sensor RTD | 1091 @ 75°F | P2-10 | P2-8 |
Element, Convection Right | 23 to 26.6 | P13-3 | P12-6 |
Element, Convection Left | 23 to 26.6 | P13-3 | P12-1 |
Fan, Convection Right | approx. 50 | P6-7 | P6-5 |
Fan, Convection Left | approx. 50 | P6-7 | P6-4 |
Element, Bake Outer | 31 to 39 | P11-4 | P10-4 |
Element, Bake Inner | 29 to 35 | P11-4 | P10-1 |
Cooling Fan | approx. 36 | P6-7 | P6-6 |
Element, Broil 30 | 15.3 to 18.5 | P11-4 | P11-1 |
Motorized Latch Motor | 12K | P6-7 | P6-3 |
Motor Door Lock-LSW | 0Ω only when door lock is locked | P2-2 | P2-1 |
Motor Door Lock-UNLSW | 0Ω only when door lock is unlocked | P2-2 | P2-3 |
Door Shut Switch -DRSW | 0Ω only when door is shut | P2-4 | P2-5 |
Lighting Transformer | approx. 50 | P6-7 | P6-2 |
Meat Probe | If inserted verify 34,000 @ 90°F | P2-5 | P2-7 |
NOTE: Test the resistance of heating elements on the plugs only when they are disconnected from the board.
A diagram of the Relay Module with test points is provided.
Ohm Test DO Components
This table lists components for the double oven (DO) and their expected resistance (Ω) values, along with test points A and B.
Component | Resistance Ω | Test Point A | Test Point B |
---|---|---|---|
Temperature Sensor RTD - Upper | 1091@ 75°F | P2-10 | P2-8 |
Temperature Sensor RTD Lower | 1091 @ 75°F | P3-10 | P3-8 |
Element, Convection Right | 23 to 26.6 | P13-3 | P12-6 |
Element, Convection Left | 23 to 26.6 | P13-3 | P12-1 |
Fan, Convection Right | approx. 50 | P6-7 | P6-5 |
Fan, Convection Left | approx. 50 | P6-7 | P6-4 |
Element, Bake Outer Upper | 31 to 39 | P11-4 | P10-4 |
Element, Bake Inner Upper | 29 to 35 | P11-4 | P10-1 |
Element, Bake Outer Lower | 31 to 39 | P15-4 | P14-4 |
Element, Bake Inner Lower | 29 to 35 | P15-4 | P14-1 |
Upper Cooling Fan | approx. 36 | P6-7 | P6-6 |
Lower Cooling Fan | approx. 25 | P6-7 | P7-1 |
Element, Broil 30 Upper | 15.3 to 18.5 | P11-4 | P11-1 |
Element, Broil 30 Lower * | 15.3 to 18.5 | P15-4 | P15-1 |
Motorized Latch Motor Upper | 12K | P6-7 | P6-3 |
Motor Door Lock-LSW (Upper) | 0Ω only when door lock is locked | P2-2 | P2-1 |
Motor Door Lock-UNLSW (Upper) | 0Ω only when door lock is unlocked | P2-2 | P2-3 |
Door Shut Switch -DRSW (Upper) | 0Ω only when door is shut | P2-4 | P2-5 |
Motorized Latch Motor Lower | 12K | P3-2 | P3-1 |
Motor Door Lock-LSW (Lower) | 0Ω only when door lock is locked | P3-2 | P3-3 |
Motor Door Lock-UNLSW (Lower) | 0Ω only when door lock is unlocked | P3-2 | P3-4 |
Door Shut Switch -DRSW (Lower) | 0Ω only when door is shut | P3-4 | P3-6 |
Lighting Transformer (Upper) | approx. 50 | P6-7 | P6-2 |
Lighting Transformer (Lower) | approx. 50 | P6-7 | P7-5 |
Meat Probe | If inserted verify 34,000 @ 90°F | P2-5 | P2-7 |
A diagram illustrating the connections for various components to the Relay Module is provided.